Patent Application
20220370188
Embodiments of this disclosure relate to a printable composition comprising: about 1 weight percent (wt %) to about 40 wt % of one or more hydrophilic monomers; a swelling control agent selected from a hydrophobic monomer, a short chain crosslinker, or a combination thereof; about 0.01 wt % to about 2 wt % of a photo initiator; and 0 wt % to about 75 wt % of a vehicle comprising a protic solvent, by weight of the printable composition; provided that when the swelling control agent is a hydrophobic monomer then the printable composition has a weight ratio of the hydrophilic monomer to the hydrophobic monomer of about 20:1 to about 1:20; and when the swelling control agent is a short chain crosslinker then the printable composition comprises about 0.01 wt % to about 5 wt % of the short chain crosslinker. In some embodiments, the hydrophilic monomer comprises one or more of hydroxy C1-2 alkyl (meth)acrylates, poly(alkylene oxide) alkyl ether (meth)acrylates, N-hydroxy C1-2 alkyl (meth)acrylamides, or mixtures thereof. In some embodiments, the hydrophilic monomer comprises one or more of poly(ethylene glycol) methyl ether acrylate (PEGMEA), poly(ethylene glycol) methyl ether methacrylate, poly(propylene glycol) methyl ether acrylate, poly(propylene glycol) methyl ether methacrylate, hydroxyethyl acrylate (HEA), N-hydroxyethyl acrylamide (HEAA), or mixtures thereof. In some embodiments, the one or more hydrophilic monomers are selected from the group consisting of PEGMA, HEA, or mixtures thereof. In some embodiments, the printable composition comprises about 5 wt % to about 35 wt % of the one or more hydrophilic monomers. In some embodiments, the printable composition comprises from about 5 wt % to about 25 wt % of the one or more hydrophilic monomers. In some embodiments, the hydrophobic monomer comprises one or more of hydroxyl C3-6 alkyl (meth)acrylates, or mixtures thereof. In some embodiments, the hydrophobic monomer comprises one or more of hydroxyethyl methacrylate, hydroxypropyl acrylate (HPA 3-Hydroxypropyl acrylate and/or 2-Hydroxypropyl acrylate), hydroxypropylmethacrylate, hydroxybutyl acrylate (HBA), hydroxybutyl methacrylate, or mixtures thereof. In some embodiments, the weight ratio of hydrophilic monomers to hydrophobic monomers is about 15:1 to about 1:15. In some embodiments, the weight ratio of hydrophilic monomers to hydrophobic monomers is about 10:1 to about 1:10. In some embodiments, the weight ratio of hydrophilic monomers to hydrophobic monomers is about 5:1 to about 1:5. In some embodiments, the weight ratio of the hydrophilic monomers to the hydrophobic monomers is about 1:1 to about 1:3. In some embodiments, the printable composition comprises HPA and HEA present in a weight ratio of about 3:1 to about 1:3. In some embodiments, the printable composition comprises HBA and HEA present in a weight ratio of about 3:1 to about 1:3. In some embodiments, the short chain crosslinkers comprise poly(alkylene oxide) di(meth)acrylates having a weight average molecular weight (MW ) of about 400 to about 20,000, diethylene glycol di(meth)acrylate, tetraethylene glycol di(meth)acrylate, N,N′-methylenebis(acylamide), (poly)lactic acid di(meth)acrylate, (poly)glycolic acid di(meth)acrylate, (poly)lactic-coglycolide di(meth)acrylate, (poly)caprolactone di(meth)acrylate, (poly)dioxanone di(meth)acrylate, (poly)fumarate di(meth)acrylate, (caboxy)(methyl)cellulose di(meth)acrylate, hyaluronic acid di(meth)acrylate, heparan sulfphate di(meth)acrylate, dextran di(meth)acrylate, alginate di(meth)acrylate, pectin di(meth)acrylate, or collagen di(meth)acrylate or mixtures thereof. In some embodiments, the poly(alkylene oxide) di(meth)acrylate comprises poly(ethylene glycol) diacrylate. In some embodiments, the printable composition comprises about 0.5 wt % to about 3 wt % of the short chain crosslinkers. In some embodiments, the photo initiator comprises lithium phenyl-2,4,6-trimethylbenzoylphosphinate (LAP), Trimethylbenzoyl based photoinitiators, diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide (TPO nanoparticle) Irgacure class of photoinitiators, ruthenium, and riboflavin, or mixtures thereof. In some embodiments, the printable composition further comprises one or more additives comprising polymers, UV dyes, natural extracellular matrices, photoinitiators, Peptides, amino acids, growth factors, denature extracellular matrices, extracellular matrix fragments or mixtures thereof. In some embodiments, the protic solvent comprises water, polyethylene glycol, Glycol diacrylate derivatives or mixtures thereof.
Additional embodiments include a method of preparing a three-dimensional article comprising printing a printable composition according to any one of the embodiments to fabricate the three-dimensional article. In some embodiments, the printing fabricates a three-dimensional article of an organ, wherein the organ is a mammalian organ. In some embodiments, the printing comprises ink jet printing, extrusion printing, or layer-by-layer printing. In some embodiments, the three-dimensional article has a swelling percentage of less than about 300% by weight, based on the non-hydrated weight of the three-dimensional article. In some embodiments, the three-dimensional article has a swelling percentage of about 1% to less than about 300% by weight, based on the non-hydrated weight of the three-dimensional article. Additional embodiments include a three-dimensional article manufactured according to the method of these embodiments.
Additional embodiments include a method of manufacturing a three-dimensional article comprising: depositing a layer of a printable composition to a surface to obtain a deposited layer; irradiating the deposited layer; and repeating the depositing and irradiating steps until the deposited layers form the three-dimensional article, wherein the printable composition comprises: about 1 weight percent (wt %) to about 40 wt % of one or more hydrophilic monomers; a swelling control agent selected from a hydrophobic monomer, a short chain crosslinker, or a combination thereof; about 0.01 wt % to about 2 wt % of a photo initiator; and 0 wt % to about 75 wt % of a vehicle comprising a protic solvent, by weight of the printable composition; provided that when the swelling control agent is a hydrophobic monomer then the printable composition has a weight ratio of the hydrophilic monomer to the hydrophobic monomer of about 20:1 to about 1:20; and when the swelling control agent is a short chain crosslinker then the printable composition comprises about 0.01 wt % to about 5 wt % of the short chain crosslinkers. In some embodiments, the printable composition is a printable composition according to any one of the embodiments. In some embodiments, the deposited layer is irradiated at a wavelength from about 365 nm to about 405 nm.
The present disclosure includes printable composition comprising: hydrophilic monomer(s), hydrophobic monomer(s), a short chain crosslinker(s), a photo initiator, solvent and/or a combination thereof. These compositions may be hydrogels. By manipulating the content of the hydrogel, such as varying amounts of hydrophilic and/or hydrophobic monomer, the shape of the resulting hydrogel when exposed to an aqueous environment, including a physiological environment, can be controlled. The disclosure also includes methods of preparing a three-dimensional article comprising printing a printable composition, and three-dimensional articles manufactured according to these methods.
As used herein, the singular forms “a,” “an,” and “the” include plural referents unless the content clearly dictates otherwise. For example, reference to “a cell” includes a combination of two or more cells, and the like.
As used herein, “weight percent” (also expressed as “wt %”), refers to the percent of one or more components relative to the total mass of the composition. Thus, a composition with a mass of 100 grams comprising 10 grams of Compound A has a weight percent of 10% for Compound A. As used herein, weight percent is used synonymously with mass percent.
As used herein, the terms “object” and “article” may be used interchangeably and refer to items comprising the compositions of the invention.
As used herein, the term “comprising” or “comprises” is intended to mean that the compositions and methods include the recited elements, but not excluding others. “Consisting essentially of” when used to define compositions and methods, shall mean excluding other elements of any essential significance to the combination for the stated purpose. Thus, a composition consisting essentially of the elements as defined herein would not exclude other materials or steps that do not materially affect the basic and novel characteristic(s) of the claimed invention. “Consisting of” shall mean excluding more than trace elements of other ingredients and substantial method steps. Embodiments defined by each of these transition terms are within the scope of this invention. When an embodiment is defined by one of these terms (e.g., “comprising”) it should be understood that this disclosure also includes alternative embodiments. Some of these embodiments may include “consisting essentially of” and “consisting of” for said embodiment.
As used herein, “swelling percent” or “percent swelling” means, unless otherwise specified, the percent change in mass of an object before and after incubation in water. Thus, a positive percentage indicates that the object has increased in size and a negative percentage indicates the object has decreased in size.
As used herein, the terms “substantially” and “about” are used to describe and account for small variations. When used in conjunction with an event or circumstance, the terms can refer to instances in which the event or circumstance occurs precisely as well as instances in which the event or circumstance occurs to a close approximation. When used in conjunction with a numerical value, the terms can refer to a range of variation of less than or equal to ±10% of that numerical value, such as less than or equal to ±5%, less than or equal to ±4%, less than or equal to ±3%, less than or equal to ±2%, less than or equal to ±1%, less than or equal to ±0.5%, less than or equal to ±0.1%, or less than or equal to ±0.05%. When referring to a first numerical value as “substantially” or “about” the same as a second numerical value, the terms can refer to the first numerical value being within a range of variation of less than or equal to ±10% of the second numerical value, such as less than or equal to ±5%, less than or equal to ±4%, less than or equal to ±3%, less than or equal to ±2%, less than or equal to ±1%, less than or equal to ±0.5%, less than or equal to ±0.1%, or less than or equal to ±0.05%.
Additionally, amounts, ratios, and other numerical values are sometimes presented herein in a range format. It is to be understood that such range format is used for convenience and brevity and should be understood flexibly to include numerical values explicitly specified as limits of a range, but also to include all individual numerical values or sub-ranges encompassed within that range as if each numerical value and sub-range is explicitly specified. For example, a ratio in the range of about 1 to about 200 should be understood to include the explicitly recited limits of about 1 and about 200, but also to include individual ratios such as about 2, about 3, and about 4, and sub-ranges such as about 10 to about 50, about 20 to about 100, and so forth.
In some embodiments, the percent change is over a time period of the incubation in water of the object or article. In some embodiments, the time period is selected from about 5 s to about 30 s, about 30 s to about 1 min, about 1 min to about 10 min, about 10 min to about 30 min, about 30 min to about 1 hr, about 1 hr to about 3 hr, about 3 hr to about 12 hr, about 12 hr to about 24 hr, about 24 hr to about 1 week (w), about 1 w to about 4 w, about 1 month to about 6 months, about greater than 6 months, or any range between any two of the values.
In some embodiments, the object, article or composition, achieves a steady state of mass over a time period is selected from about 5 s to about 30 s, about 30 s to about 1 min, about 1 min to about 10 min, about 10 min to about 30 min, about 30 min to about 1 hr, about 1 hr to about 3 hr, about 3 hr to about 12 hr, about 12 hr to about 24 hr, about 24 hr to about 1 week (w), about 1 w to about 4 w, about 1 month to about 6 months, about greater than 6 months, or any range between any two of the values.
A “steady state of mass,” as used herein, comprises a state where the mass of the composition or article remains constant even upon remaining incubated in water.
The present application incorporates by reference in their entirety each of the following documents: (a) U.S. provisional application No. 63/185293 filed May 6, 2021 titled “USE OF FUNCTIONALIZED AND NON-FUNCTIONALIZED ECMS, ECM FRAGMENTS, PEPTIDES AND BIOACTIVE COMPONENTS TO CREATE CELL ADHESIVE 3D PRINTED OBJECTS” and U.S. non-provisional and/or PCT application(s) under the same title filed on May 6, 2022; (b) U.S. provisional application No. 63/185302 filed May 6, 2021 titled “MODIFIED 3D-PRINTED OBJECTS AND THEIR USES” and U.S. non-provisional and/or PCT application(s) under the same title filed on May 6, 2022; (c) U.S. provisional application No. 63/185305 filed May 6, 2021 titled “PHOTOCURABLE REINFORCEMENT OF 3D PRINTED HYDROGEL OBJECTS” and U.S. non-provisional and/or PCT application(s) under the same title filed on May 6, 2022; (d) U.S. provisional application No. 63/185299 filed May 6,2021 titled “ADDITIVE MANUFACTURING OF HYDROGEL TUBES FOR BIOMEDICAL APPLICATIONS” and U.S. non-provisional and/or PCT application(s) under the same title filed on May 6, 2022; (e) U.S. provisional application No. 63/185298 filed May 6, 2021 titled “MICROPHYSIOLOGICAL 3-D PRINTING AND ITS APPLICATIONS” and U.S. non-provisional and/or PCT application(s) under the same title filed on May 6, 2022.
Certain embodiments of the present disclosure relate to compositions comprising: hydrophilic monomer(s) and/or polymers, hydrophobic monomer(s) and/or polymers, a short chain crosslinker(s), a photo initiator, solvent and/or a combination thereof. In some embodiments, these compositions are printable, e.g., capable of being used in the 3-D printer.
Some embodiments include a printable composition comprising: about 1 weight percent (wt %) to about 40 wt % of one or more hydrophilic monomers; a swelling control agent selected from a hydrophobic monomer, a short chain crosslinker, or combinations thereof. The composition may comprise about 0.01 wt % to about 2 wt % of a photo initiator and/or 0 wt % to about 75 wt % of a vehicle comprising a protic solvent, by weight of the printable composition.
Hydrophilic monomers of the present disclosure are not particularly limited as long as they are suitable for the intended purposes. In some embodiments, the hydrophilic monomer comprises an acrylate or methacrylate moiety and a hydrophilic sidechain attached to the (meth)acrylate. In some embodiments, the hydrophilic monomer is water soluble, e.g., the monomer or a homopolymer is water soluble. Exemplary embodiments of the hydrophilic monomer include one or more of hydroxy C1-2 alkyl (meth)acrylates, poly(alkylene oxide) alkyl ether (meth)acrylates, N-hydroxy C1-2 alkyl (meth)acrylamides, and mixtures thereof. In additional embodiments of the hydrophilic monomer comprises one or more of poly(ethylene glycol) methyl ether acrylate (PEGMEA), poly(ethylene glycol) methyl ether methacrylate, poly(propylene glycol) methyl ether acrylate, poly(propylene glycol) methyl ether methacrylate, hydroxyethyl acrylate (HEA), N-hydroxyethyl acrylamide (HEAA), hydrophilic acrylate, hydrophilic vinyl, hydrophilic non-ionic, hydrophilic ionic, graft hydrophilic, hydrophobic acrylate, hydrophobic vinyl, hydrophobic non-ionic, hydrophobic ionic, graft hydrophobic, or mixtures thereof. In some embodiments, the composition may comprise peptides, cleavable peptide monomers, dithiol monomers, thiol-acrylates, diacrylates, and PEG-diacrylates. In particular embodiments, the one or more hydrophilic monomers are selected from the group consisting of PEGMA, HEA, or mixtures thereof. In particular embodiments, the one or more hydrophilic monomers include PEGMA and a second hydrophilic monomer. In some embodiments, the composition includes about 10, 15, 20, 25, or 30 wt % PEGMA and optionally a second hydrophilic monomer. In some embodiments, the second hydrophilic monomer is less hydrophilic and/or has a shorter side chain than the PEGMA. In some embodiments, the PEGMA includes the following monomer:
where a is an integer of 2-20 (e.g., 2, 3, 4, 8, 20, etc.). The integer a can be a mixture of a single value, for example:
In some embodiments, when the swelling control agent is a hydrophobic monomer then the printable composition has a weight ratio of the hydrophilic monomer to the hydrophobic monomer of about 100:1 to about 1:100. For example, certain embodiments include a weight ratio of the hydrophilic monomer to the hydrophobic monomer of about 100:1, about 90:1, about 80:1, about 70:1, about 60:1, about 50:1, about 40:1, about 30:1, about 20:1, about 10:1, about 1:1, about 1:10, about 1:20, about 1:30, about 1:40, about 1:50, about 1:60, about 1:70, about 1:80, about 1:90, or about 1:100, or any range between any two of the values. For example, in some embodiments, the weight ratio of the hydrophilic monomer to the hydrophobic monomer is about 20:1 to about 1:20, about 15:1 to about 1:15, about 10:1 to about 1:10, about 5:1 to about 1:5, about 3:1 to about 1:3, about 1:1 to about 1:3. These weight ratios of the hydrophilic monomer (or polymer) to the hydrophobic monomer (or polymer) include, e.g., HPA and HEA (or PEGMA) or HBA and HEA (or PEGMA). In some embodiments, hydrophobic and hydrophilic monomers can be used in place of or in addition to the monomers in the same ratios disclosed for the monomers. When polymers are used in combination with monomers, the ratios disclosed are the sum of hydrophobic and hydrophilic respectively (hydrophilic monomers +hydrophilic polymers:hydrophobic monomers +hydrophobic polymers).
Hydrophobic monomers of the present disclosure are not particularly limited as long as they are suitable for the intended purposes. In some embodiments, the hydrophobic monomer comprises an acrylate or methacrylate moiety and a hydrophobic sidechain attached to the (meth)acrylate. In some embodiments, the hydrophobic monomer is not water soluble, e.g., the monomer or a homopolymer is not water soluble. In some embodiments, the hydrophobic monomer is hydrophobic relative to the other monomers in the composition. Non-limiting examples of hydrophobic monomers include one or more of hydroxyl C3-10 alkyl (meth)acrylates, or mixtures thereof (e.g., hydroxyethyl methacrylate, hydroxypropyl acrylate (HPA), hydroxypropylmethacrylate, hydroxybutyl acrylate (HBA), hydroxybutyl methacrylate, hydrophilic acrylate, hydrophilic vinyl, hydrophilic non-ionic, hydrophilic ionic, graft hydrophilic, hydrophobic acrylate, hydrophobic vinyl, hydrophobic non-ionic, hydrophobic ionic, graft hydrophobic, or mixtures thereof). In some embodiments, the C3-io alkyl (meth)acrylate is a C3, C4, C5, C6, C7, C8, C9, C10 alkyl (meth)acrylate. In some embodiments, the alkyl (meth)acrylate is optionally substituted, e.g., with a hydrophobic moiety, such as an aryl group or a hydrocarbon group. In some embodiments, the composition comprises peptide monomers, cleveable peptide monomers, dithiol monomers, thiol-acrylates, diacrylates, PEG-diacrylates, and combinations thereof.
In some embodiments, when the swelling control agent is a short chain crosslinker then the printable composition comprises about 0.01 wt % to about 10 wt % of the short chain crosslinker. Exemplary embodiments include where the printable composition comprises about 0.05, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5, 5.5, 6., 6.5, 7., 7.5, 8, 8.5, 9, 9.5, or 10 wt % of the short chain crosslinker, or any range between any two of the values. For example, in some embodiments, the printable composition comprises about 0.01 wt % to about 5 wt % of the short chain crosslinker.
The short chain crosslinkers include, e.g., poly(alkylene oxide) di(meth)acrylates having a weight average molecular weight (MW ) of about 400 to about 20,000, diethylene glycol di(meth)acrylate, tetraethylene glycol di(meth)acrylate, N,N′-methylenebis(acylamide), (poly)lactic acid di(meth)acrylate, (poly)glycolic acid di(meth)acrylate, (poly)lactic-coglycolide di(meth)acrylate, (poly)caprolactone di(meth)acrylate, (poly)dioxanone di(meth)acrylate, (poly)fumarate di(meth)acrylate, (caboxy)(methyl)cellulose di(meth)acrylate, hyaluronic acid di(meth)acrylate, heparan sulfphate di(meth)acrylate, dextran di(meth)acrylate, alginate di(meth)acrylate, pectin di(meth)acrylate, or collagen di(meth)acrylate or mixtures thereof. In some embodiments, the poly(alkylene oxide) di(meth)acrylate comprises poly(ethylene glycol) diacrylate
The photo initiator is not particularly limited. In some embodiments, it is such as to allow for onset times from 0-60 seconds. In some embodiments, the photo initiator comprises lithium phenyl-2,4,6-trimethylbenzoylphosphinate (LAP), trimethylbenzoyl based photoinitiators, diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide (TPO nanoparticle) Irgacure class of photoinitiators, ruthenium, and riboflavin, or mixtures thereof.
The printable composition can further comprise one or more additives comprising polymers, UV dyes, natural extracellular matrices, peptides, amino acids, growth factors, denature extracellular matrices, extracellular matrix fragments or mixtures thereof.
The solvent is not particularly limited as long as it allows for 3-D printing and/or allows for polymerization. In some embodiments, the solvent is a protic solvent, e.g., a protic solvent that comprises water, polyethylene glycol, glycol diacrylate derivatives or mixtures thereof.
In some embodiments, the printable composition permits onset times from greater than 0 to about 60 seconds (e.g., about 1, 2, 3, 4, 5, 10, 15, 20, 30, 40, 50, 60 seconds). In some embodiments, the printable composition permits resolution down to 100, 50, 25, 25, 1 micron or less in a 3-D printer. In some embodiments, the printable composition results in a printed composition having a green strength ranging from about 10 kPa to about 1 MPa.
Certain embodiments of the present disclosure relate to preparing a three-dimensional article comprising printing a printable composition according to the embodiments herein. In some embodiments, the printing fabricates a three-dimensional organ or components of an organ. For example the three-dimensional object can be a mammalian organ, e.g., a lung, or a components of a mammalian organ, e.g., bronchioles. In some embodiments, the printing comprises ink jet printing, extrusion printing, or layer-by-layer printing. In some embodiments, the methods further include irradiating the printed composition. In some embodiments, the composition is irradiated at a wavelength from about 365 nm to about 405 nm.
Certain embodiments of the present disclosure relate to a method of manufacturing a three-dimensional article comprising: depositing a layer of a printable composition to a surface to obtain a deposited layer; irradiating the deposited layer; and repeating the depositing and irradiating steps until the deposited layers form the three-dimensional article, wherein the printable composition is a composition disclosed herein. In some embodiments, the deposited layer is irradiated at a wavelength from about 365 nm to about 405 nm.
In some embodiments the printable composition comprises: about 1 weight percent (wt %) to about 40 wt % of one or more hydrophilic monomers; a swelling control agent selected from a hydrophobic monomer, a short chain crosslinker, or a combination thereof; about 0.01 wt % to about 2 wt % of a photo initiator; and 0 wt % to about 75 wt % of a vehicle comprising a protic solvent, by weight of the printable composition; provided that when the swelling control agent is a hydrophobic monomer then the printable composition has a weight ratio of the hydrophilic monomer to the hydrophobic monomer of about 20:1 to about 1:20; and when the swelling control agent is a short chain crosslinker then the printable composition comprises about 0.01 wt % to about 5 wt % of the short chain crosslinkers.
In some embodiments, the three-dimensional article has a swelling percentage of less than about 300% by weight, based on the non-hydrated weight of the three-dimensional article. In some embodiments, the swelling percentage is less than about 300%, 250%, 200, 175%, 150% by weight, based on the non-hydrated weight of the three-dimensional article. In some embodiments, the swelling percentage is at least about 1%, 2%, 3%, 4%, 5%, 10%, 20%, 50%, 60%, 70%, 80%, 90%, or 100%, based on the non-hydrated weight of the three-dimensional article. The three-dimensional article may also have a swelling percentage within a range of the above values, for example, in some embodiments, the three-dimensional article has a swelling percentage of about 1% to less than about 300% by weight, based on the non-hydrated weight of the three-dimensional article.
In some embodiments, the methods further include one or more step of surface modification, post processing to promote cell attachment, addition of cells, mechanical stimulation: expansion, contraction, and/or perfusion.
The present disclosure also includes embodiments of a three-dimensional article manufactured according to the methods of this disclosure.
The following example describes specific aspects of some embodiments of this disclosure to illustrate and provide a description for those of ordinary skill in the art. The example should not be construed as limiting this disclosure, as the example merely provides specific methodology useful in understanding and practicing some embodiments of this disclosure.
30-45% PEGMEA hydrogel and 25-35% PEGMEA hydrogel
Hydrogels were formed by initiating polymerization of the following compositions:
Both compositions were weighed before and after being placed in an aequeous buffer overnight. As shown in
Additional hydrogels were synthesized based on the 25-35% PEGMEA hydrogel, where specific amounts of PEGMEA was replaced with hydrophobic 2-Hydroxypropyl acrylate (2-HPA).
As shown in
As shown in
As shown in the following tables, varying brush polymer to monomer ratio allowed for effective modulation of swelling outcome. This control was also reproducible.
Additional polymers were made with other monomers besides HPA, including HBA and HEA, thereby demonstrating that controlled swelling can be obtained with a broad range of monomers.
Next, polymers with increasing [HPA/HEA] ratios and [HBA/HEA] ratios were synthesized using the following compositions:
A 25-35 PEGMEA formulation without additional crosslinkers and with varying amounts of MBAA were synthesized. The compositions used were as follows.
As shown in
While the disclosure has been described with reference to the specific embodiments thereof, it should be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the true spirit and scope of the disclosure as defined by the appended claim(s). In addition, many modifications may be made to adapt a particular situation, material, composition of matter, method, operation or operations, to the objective, spirit and scope of the disclosure. All such modifications are intended to be within the scope of the claim(s) appended hereto. In particular, while certain methods may have been described with reference to particular operations performed in a particular order, it will be understood that these operations may be combined, sub-divided, or re-ordered to form an equivalent method without departing from the teachings of the disclosure. Accordingly, unless specifically indicated herein, the order and grouping of the operations is not a limitation of the disclosure.
This application claims priority to U.S. Provisional Application No. 63/185,300, filed May 6, 2021, the entire contents of which are incorporated herein by reference.
| Number | Date | Country | |
|---|---|---|---|
| 63185300 | May 2021 | US |
