1
|
Jeong H, Gu J, Mwasame P, Patankar K, Yu D, Sing CE. Modeling the competition between phase separation and polymerization under explicit polydispersity. SOFT MATTER 2024; 20:681-692. [PMID: 38164983 DOI: 10.1039/d3sm01411h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
The dynamics of phase separation for polymer blends is important in determining the final morphology and properties of polymer materials; in practical applications, this phase separation can be controlled by coupling to polymerization reaction kinetics via a process called 'polymerization-induced phase separation'. We develop a phase-field model for a polymer melt blend using a polymerizing Cahn-Hilliard (pCH) formalism to understand the fundamental processes underlying phase separation behavior of a mixture of two species independently undergoing linear step-growth polymerization. In our method, we explicitly model polydispersity in these systems to consider different molecular-weight components that will diffuse at different rates. We first show that this pCH model predicts results consistent with the Carothers predictions for step-growth polymerization kinetics, the Flory-Huggins theory of polymer mixing, and the classical predictions of spinodal decomposition in symmetric polymer blends. The model is then used to characterize (i) the competition between phase separation dynamics and polymerization kinetics, and (ii) the effect of unequal reaction rates between species. For large incompatibility between the species (i.e. high χ), our pCH model demonstrates that the strength for phase separation directly corresponds to the kinetics of phase separation. We find that increasing the reaction rate k̃, first induces faster phase separation but this trend reverses as we further increase k̃ due to the competition between molecular diffusion and polymerization. In this case, phase separation is delayed for faster polymerization rates due to the rapid accumulation of slow-moving, high molecular weight components.
Collapse
Affiliation(s)
- Hyeonmin Jeong
- Department of Chemical and Biomolecular Engineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA.
| | - Junsi Gu
- Dow Chemical Company, Midland, MI, 48667, USA
| | | | | | - Decai Yu
- Dow Chemical Company, Midland, MI, 48667, USA
| | - Charles E Sing
- Department of Chemical and Biomolecular Engineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA.
| |
Collapse
|
2
|
Naga N, Jinno M, Wang Y, Nakano T. The first space-filling polyhedrons of polymer cubic cells originated from Weaire-Phelan structure created by polymerization induced phase separation. Sci Rep 2022; 12:19141. [DOI: 10.1038/s41598-022-22058-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Accepted: 10/10/2022] [Indexed: 11/11/2022] Open
Abstract
AbstractThe Weaire–Phelan structure is a three-dimensional structure composed of two different polyhedra having the same volume, i.e., pyritohedron and truncated hexagonal trapezohedron. It was proposed by Weaire and Phelan in 1993 as a solution of the Kelvin problem of filling space with no gaps with cells of minimum surface area and equal volume. It was found in physical systems including liquid foam and a metal alloy while it has never been constructed as organic materials. We report herewith the first polymeric Weaire–Phelan structure constructed through phase-separation of a single polymer species that is synthesized by simple polyaddition between tetrakis(3-mercaptopropionate) and 1,6-diisocyanatohexane. The structure has the order of micrometers and is amorphous unlike reported crystal structures similar to the Weaire–Phelan structure.
Collapse
|
3
|
Shumovskyi NA, Longo TJ, Buldyrev SV, Anisimov MA. Modeling fluid polyamorphism through a maximum-valence approach. Phys Rev E 2022; 106:015305. [PMID: 35974620 DOI: 10.1103/physreve.106.015305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 06/07/2022] [Indexed: 06/15/2023]
Abstract
We suggest a simple model to describe polyamorphism in single-component fluids using a maximum-valence approach. The model contains three types of interactions: (i) Atoms attract each other by van der Waals forces that generate a liquid-gas transition at low pressures, (ii) atoms may form covalent bonds that induce association, and (iii) atoms with maximal valence attract or repel each other stronger than other atoms, thus generating liquid-liquid separation. As an example, we qualitatively compare this model with the behavior of liquid sulfur and show that condition (iii) generates a liquid-liquid phase transition in addition to the liquid-gas phase transition.
Collapse
Affiliation(s)
| | - Thomas J Longo
- Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742, USA
| | - Sergey V Buldyrev
- Department of Physics, Yeshiva University, New York, New York 10033, USA and Department of Physics, Boston University, Massachusetts 02215, USA
| | - Mikhail A Anisimov
- Department of Chemical and Biomolecular Engineering and Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742, USA
| |
Collapse
|
4
|
Contini C, Hu W, Elani Y. Manufacturing polymeric porous capsules. Chem Commun (Camb) 2022; 58:4409-4419. [PMID: 35298578 PMCID: PMC8981216 DOI: 10.1039/d1cc06565c] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 02/09/2022] [Indexed: 12/19/2022]
Abstract
Polymeric porous capsules represent hugely promising systems that allow a size-selective through-shell material exchange with their surroundings. They have vast potential in applications ranging from drug delivery and chemical microreactors to artificial cell science and synthetic biology. Due to their porous core-shell structure, polymeric porous capsules possess an enhanced permeability that enables the exchange of small molecules while retaining larger compounds and macromolecules. The cross-capsule transfer of material is regulated by their pore size cut-off, which depends on the molecular composition and adopted fabrication method. This review outlines the main strategies for manufacturing polymeric porous capsules and provides some practical guidance for designing polymeric capsules with controlled pore size.
Collapse
Affiliation(s)
- Claudia Contini
- Department of Chemical Engineering, Imperial College London, Exhibition Road, London SW7 2AZ, UK.
- FabriCELL, Molecular Sciences Research Hub, Imperial College London, 82 Wood Lane, London W12 0BZ, UK
| | - Wenyi Hu
- Department of Chemical Engineering, Imperial College London, Exhibition Road, London SW7 2AZ, UK.
| | - Yuval Elani
- Department of Chemical Engineering, Imperial College London, Exhibition Road, London SW7 2AZ, UK.
- FabriCELL, Molecular Sciences Research Hub, Imperial College London, 82 Wood Lane, London W12 0BZ, UK
| |
Collapse
|
5
|
Oya Y, Kikugawa G, Okabe T, Kawakatsu T. Density Functional Theory for Polymer Phase Separations Induced by Coupling of Chemical Reaction and Elastic Stress. ADVANCED THEORY AND SIMULATIONS 2021. [DOI: 10.1002/adts.202100385] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yutaka Oya
- Department of Physics Tohoku University Aramaki‐Aza‐Aoba, Aoba‐ku Sendai 980‐8578 Japan
| | - Gota Kikugawa
- Institute of Fluid Science Tohoku University Katahira, Aoba‐ku Sendai 980‐8577 Japan
| | - Tomonaga Okabe
- Department of Aerospace Engineering Tohoku University Aramaki‐Aza‐Aoba, Aoba‐ku Sendai 980‐8579 Japan
- Department of Material Science and Engineering University of Washington Seattle WA 98195 USA
| | - Toshihiro Kawakatsu
- Department of Physics Tohoku University Aramaki‐Aza‐Aoba, Aoba‐ku Sendai 980‐8578 Japan
| |
Collapse
|
6
|
Inguva PK, Walker PJ, Yew HW, Zhu K, Haslam AJ, Matar OK. Continuum-scale modelling of polymer blends using the Cahn-Hilliard equation: transport and thermodynamics. SOFT MATTER 2021; 17:5645-5665. [PMID: 34095939 DOI: 10.1039/d1sm00272d] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The Cahn-Hilliard equation is commonly used to study multi-component soft systems such as polymer blends at continuum scales. We first systematically explore various features of the equation system, which give rise to a deep connection between transport and thermodynamics-specifically that the Gibbs free energy of mixing function is central to formulating a well-posed model. Accordingly, we explore how thermodynamic models from three broad classes of approach (lattice-based, activity-based and perturbation methods) can be incorporated within the Cahn-Hilliard equation and examine how they impact the numerical solution for two model polymer blends, noting that although the analysis presented here is focused on binary mixtures, it is readily extensible to multi-component mixtures. It is observed that, although the predicted liquid-liquid interfacial tension is quite strongly affected, the choice of thermodynamic model has little influence on the development of the morphology.
Collapse
Affiliation(s)
- Pavan K Inguva
- Department of Chemical Engineering, Massachusetts Institute of Technology, 25 Ames Street, Cambridge, MA 02142, USA and Department of Chemical Engineering, Imperial College London, SW7 2AZ, UK.
| | - Pierre J Walker
- Department of Chemical Engineering, Imperial College London, SW7 2AZ, UK.
| | - Hon Wa Yew
- Department of Chemical Engineering, Imperial College London, SW7 2AZ, UK.
| | - Kezheng Zhu
- Department of Chemical Engineering, Imperial College London, SW7 2AZ, UK.
| | - Andrew J Haslam
- Department of Chemical Engineering, Imperial College London, SW7 2AZ, UK.
| | - Omar K Matar
- Department of Chemical Engineering, Imperial College London, SW7 2AZ, UK.
| |
Collapse
|
7
|
Wang F, Altschuh P, Ratke L, Zhang H, Selzer M, Nestler B. Progress Report on Phase Separation in Polymer Solutions. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1806733. [PMID: 30856293 DOI: 10.1002/adma.201806733] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 11/22/2018] [Indexed: 05/11/2023]
Abstract
Polymeric porous media (PPM) are widely used as advanced materials, such as sound dampening foams, lithium-ion batteries, stretchable sensors, and biofilters. The functionality, reliability, and durability of these materials have a strong dependence on the microstructural patterns of PPM. One underlying mechanism for the formation of porosity in PPM is phase separation, which engenders polymer-rich and polymer-poor (pore) phases. Herein, the phase separation in polymer solutions is discussed from two different aspects: diffusion and hydrodynamic effects. For phase separation governed by diffusion, two novel morphological transitions are reviewed: "cluster-to-percolation" and "percolation-to-droplets," which are attributed to an effect that the polymer-rich and the solvent-rich phases reach the equilibrium states asynchronously. In the case dictated by hydrodynamics, a deterministic nature for the microstructural evolution during phase separation is scrutinized. The deterministic nature is caused by an interfacial-tension-gradient (solutal Marangoni force), which can lead to directional movement of droplets as well as hydrodynamic instabilities during phase separation.
Collapse
Affiliation(s)
- Fei Wang
- Institute of Applied Materials-Computational Materials Science, Karlsruhe Institute of Technology (KIT), Straße am Forum 7, 76131, Karlsruhe, Germany
| | - Patrick Altschuh
- Institute of Applied Materials-Computational Materials Science, Karlsruhe Institute of Technology (KIT), Straße am Forum 7, 76131, Karlsruhe, Germany
- Institute of Digital Materials Science, Karlsruhe University of Applied Sciences, Moltkestraße 30, 76133, Karlsruhe, Germany
| | - Lorenz Ratke
- Institute of Materials Research, German Aerospace Center (DLR), Linder Hoehe, 51147, Cologne, Germany
| | - Haodong Zhang
- Institute of Applied Materials-Computational Materials Science, Karlsruhe Institute of Technology (KIT), Straße am Forum 7, 76131, Karlsruhe, Germany
| | - Michael Selzer
- Institute of Applied Materials-Computational Materials Science, Karlsruhe Institute of Technology (KIT), Straße am Forum 7, 76131, Karlsruhe, Germany
- Institute of Digital Materials Science, Karlsruhe University of Applied Sciences, Moltkestraße 30, 76133, Karlsruhe, Germany
| | - Britta Nestler
- Institute of Applied Materials-Computational Materials Science, Karlsruhe Institute of Technology (KIT), Straße am Forum 7, 76131, Karlsruhe, Germany
- Institute of Digital Materials Science, Karlsruhe University of Applied Sciences, Moltkestraße 30, 76133, Karlsruhe, Germany
| |
Collapse
|
8
|
Al-Abboodi A, Zhang S, Al-Saady M, Ong JW, Chan PPY, Fu J. Printing
in situ
tissue sealant with visible-light-crosslinked porous hydrogel. Biomed Mater 2019; 14:045010. [DOI: 10.1088/1748-605x/ab19fe] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
9
|
Li M, Joung D, Kozinski JA, Hwang DK. Fabrication of Highly Porous Nonspherical Particles Using Stop-Flow Lithography and the Study of Their Optical Properties. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:184-190. [PMID: 27933811 DOI: 10.1021/acs.langmuir.6b03358] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A microfluidic flow lithography approach was investigated to synthesize highly porous nonspherical particles and Janus particles in a one-step and high-throughput fashion. In this study, using common solvents as porogens, we were able to synthesize highly porous particles with different shapes using ultraviolet (UV) polymerization-induced phase separation in a microfluidic channel. We also studied the pore-forming process using operating parameters such as porogen type, porogen concentration, and UV intensity to tune the pore size and increase the pore size to submicron levels. By simply coflowing multiple streams in the microfluidic channel, we were able to create porous Janus particles; we showed that their anisotropic swelling/deswelling exhibit a unique optical shifting. The distinctive optical properties and the enlarged surface area of the highly porous particles can improve their performance in various applications such as optical sensors and drug loading.
Collapse
Affiliation(s)
- Minggan Li
- Department of Chemical Engineering, Ryerson University , 350 Victoria Street, Toronto, Ontario M5B 2K3, Canada
- Keenan Research Centre for Biomedical Science, St. Michael's Hospital , 30 Bond Street, Toronto, Ontario M5B 1W8, Canada
- Institute for Biomedical Engineering, Science and Technology (iBEST) , A partnership between Ryerson University and St. Michael's Hospital, 30 Bond Street, Toronto, Ontario M5B 1W8, Canada
| | - Dehi Joung
- Department of Chemical Engineering, Ryerson University , 350 Victoria Street, Toronto, Ontario M5B 2K3, Canada
- Keenan Research Centre for Biomedical Science, St. Michael's Hospital , 30 Bond Street, Toronto, Ontario M5B 1W8, Canada
- Institute for Biomedical Engineering, Science and Technology (iBEST) , A partnership between Ryerson University and St. Michael's Hospital, 30 Bond Street, Toronto, Ontario M5B 1W8, Canada
| | - Janusz A Kozinski
- Lassonde School of Engineering, York University , 4700 Keele Street, Toronto, Ontario M3J 1P3, Canada
| | - Dae Kun Hwang
- Department of Chemical Engineering, Ryerson University , 350 Victoria Street, Toronto, Ontario M5B 2K3, Canada
- Keenan Research Centre for Biomedical Science, St. Michael's Hospital , 30 Bond Street, Toronto, Ontario M5B 1W8, Canada
- Institute for Biomedical Engineering, Science and Technology (iBEST) , A partnership between Ryerson University and St. Michael's Hospital, 30 Bond Street, Toronto, Ontario M5B 1W8, Canada
| |
Collapse
|
10
|
Higuchi T, Yano Y, Aita T, Takami S, Adschiri T. Phase-Field Simulation of Polymerization-Induced Phase Separation: II. Effect of Volume Fraction and Mobility of Network Polymer. JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 2017. [DOI: 10.1252/jcej.16we037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Takeshi Higuchi
- Department of Chemistry and Chemical Engineering, Yamagata University
| | - Yusuke Yano
- Department of Chemistry and Chemical Engineering, Yamagata University
| | - Tadahiro Aita
- Department of Chemistry and Chemical Engineering, Yamagata University
| | - Seiichi Takami
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
| | - Tadafumi Adschiri
- World Premier International Research Center, Advanced Institute for Materials Research (WPI-AIMR), Tohoku University
| |
Collapse
|
11
|
Li M, Humayun M, Hughes B, Kozinski JA, Hwang DK. A microfluidic approach for the synthesis and assembly of multi-scale porous membranes. RSC Adv 2015. [DOI: 10.1039/c5ra21200f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Polymeric porous membranes with multiscale pores and heterogeneous functions are synthesized in a one-step fashion using a microfluidic approach.
Collapse
Affiliation(s)
- Minggan Li
- Department of Chemical Engineering
- Ryerson University
- Toronto
- Canada
| | - Mouhita Humayun
- Department of Chemical Engineering
- Ryerson University
- Toronto
- Canada
| | - Bethany Hughes
- Department of Chemical Engineering
- Ryerson University
- Toronto
- Canada
| | | | - Dae Kun Hwang
- Department of Chemical Engineering
- Ryerson University
- Toronto
- Canada
| |
Collapse
|
12
|
Abedin F, Ye Q, Good HJ, Parthasarathy R, Spencer P. Polymerization- and solvent-induced phase separation in hydrophilic-rich dentin adhesive mimic. Acta Biomater 2014; 10:3038-47. [PMID: 24631658 DOI: 10.1016/j.actbio.2014.03.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2013] [Revised: 02/12/2014] [Accepted: 03/03/2014] [Indexed: 11/30/2022]
Abstract
Current dental resin undergoes phase separation into hydrophobic-rich and hydrophilic-rich phases during infiltration of the over-wet demineralized collagen matrix. Such phase separation undermines the integrity and durability of the bond at the composite/tooth interface. This study marks the first time that the polymerization kinetics of model hydrophilic-rich phase of dental adhesive has been determined. Samples were prepared by adding varying water content to neat resins made from 95 and 99 wt.% hydroxyethylmethacrylate and 5 and 1 wt.% (2,2-bis[4-(2-hydroxy-3-methacryloxypropoxy)phenyl1]-propane prior to light curing. Viscosity of the formulations decreased with increased water content. The photopolymerization kinetics study was carried out with a time-resolved Fourier transform infrared spectrometer. All of the samples exhibited two-stage polymerization behavior which has not been reported previously for dental resin formulation. The lowest secondary rate maxima were observed for water contents of 10-30 wt.%. Differential scanning calorimetry (DSC) showed two glass transition temperatures for the hydrophilic-rich phase of dental adhesive. The DSC results indicate that the heterogeneity within the final polymer structure decreased with increasing water content. The results suggest a reaction mechanism involving both polymerization-induced phase separation and solvent-induced phase separation for the model hydrophilic-rich phase of dental resin.
Collapse
Affiliation(s)
- Farhana Abedin
- Bioengineering Research Center, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA; Bioengineering Graduate Program, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
| | - Qiang Ye
- Bioengineering Research Center, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA.
| | - Holly J Good
- Bioengineering Research Center, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
| | - Ranganathan Parthasarathy
- Bioengineering Research Center, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
| | - Paulette Spencer
- Bioengineering Research Center, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA; Department of Mechanical Engineering, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
| |
Collapse
|
13
|
Hara A, Inoue R, Takahashi N, Nishida K, Kanaya T. Trajectory of Critical Point in Polymerization-Induced Phase Separation of Epoxy/Oligoethylene Glycol Solutions. Macromolecules 2014. [DOI: 10.1021/ma5009258] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ayana Hara
- Institute
for Chemical Research, Kyoto University, Uji, Kyoto-fu 611-0011, Japan
| | - Rintaro Inoue
- Institute
for Chemical Research, Kyoto University, Uji, Kyoto-fu 611-0011, Japan
| | - Nobuaki Takahashi
- Institute
for Chemical Research, Kyoto University, Uji, Kyoto-fu 611-0011, Japan
| | - Koji Nishida
- Institute
for Chemical Research, Kyoto University, Uji, Kyoto-fu 611-0011, Japan
| | - Toshiji Kanaya
- Institute
for Chemical Research, Kyoto University, Uji, Kyoto-fu 611-0011, Japan
| |
Collapse
|
14
|
Al‐Abboodi A, Fu J, Doran PM, Tan TTY, Chan PPY. Injectable 3D hydrogel scaffold with tailorable porosity post-implantation. Adv Healthc Mater 2014; 3:725-36. [PMID: 24151286 DOI: 10.1002/adhm.201300303] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2013] [Indexed: 12/28/2022]
Abstract
Since rates of tissue growth vary significantly between tissue types, and also between individuals due to differences in age, dietary intake, and lifestyle-related factors, engineering a scaffold system that is appropriate for personalized tissue engineering remains a significant challenge. In this study, a gelatin-hydroxyphenylpropionic acid/carboxylmethylcellulose-tyramine (Gtn-HPA/CMC-Tyr) porous hydrogel system that allows the pore structure of scaffolds to be altered in vivo after implantation is developed. Cross-linking of Gtn-HPA/CMC-Tyr hydrogels via horseradish peroxidase oxidative coupling is examined both in vitro and in vivo. Post-implantation, further alteration of the hydrogel structure is achieved by injecting cellulase enzyme to digest the CMC component of the scaffold; this treatment yields a structure with larger pores and higher porosity than hydrogels without cellulase injection. Using this approach, the pore sizes of scaffolds are altered in vivo from 32-87 μm to 74-181 μm in a user-controled manner. The hydrogel is biocompatible to COS-7 cells and has mechanical properties similar to those of soft tissues. The new hydrogel system developed in this work provides clinicians with the ability to tailor the structure of scaffolds post-implantation depending on the growth rate of a tissue or an individual's recovery rate, and could thus be ideal for personalized tissue engineering.
Collapse
Affiliation(s)
- Aswan Al‐Abboodi
- Department of Chemical Engineering Monash University Clayton 3800 Australia
| | - Jing Fu
- Department of Mechanical & Aerospace Engineering Monash University Clayton 3800 Australia
| | - Pauline M. Doran
- Faculty of Life & Social Sciences Swinburne University of Technology Hawthorn 3122 Australia
| | - Timothy T. Y. Tan
- School of Chemical & Biomedical Engineering Nanyang Technological University 637459 Singapore
| | - Peggy P. Y. Chan
- MicroNanoPhysics Research Laboratory School of Applied Science RMIT University 3000, Australia, Melbourne Centre for Nanofabricaton Australian National Fabrication Facility Clayton 3168 Australia
| |
Collapse
|
15
|
Synthesis and morphology control of self-condensable naphthalene-containing polyimide by using reaction-induced crystallization. Eur Polym J 2013. [DOI: 10.1016/j.eurpolymj.2013.05.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
16
|
Benmouna F, Bouabdellah-Dembahri Z, Benmouna M. Polymerization-induced Phase Separation: Phase Behavior Developments and Hydrodynamic Interaction. J MACROMOL SCI B 2012. [DOI: 10.1080/00222348.2012.748617] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
17
|
Wakabayashi K, Sumi N, Yamazaki S, Uchida T, Kimura K. Morphosynthesis of poly(ether ketone) by reaction-induced crystallization during polymerization. Eur Polym J 2012. [DOI: 10.1016/j.eurpolymj.2012.07.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
18
|
Sawai T, Wakabayashi K, Yamazaki S, Uchida T, Kimura K. Morphosynthesis of poly[4-(1,4-phenylene)oxyphthalimide] and copolymers prepared by reaction-induced crystallization during polymerization. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/polb.23122] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
19
|
Zimnyakov DA, Isaeva AA, Isaeva EA, Ushakova OV, Chekmasov SP, Yuvchenko SA. Analysis of the scatter growth in dispersive media with the use of dynamic light scattering. APPLIED OPTICS 2012; 51:C62-C69. [PMID: 22505113 DOI: 10.1364/ao.51.000c62] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2011] [Accepted: 02/06/2012] [Indexed: 05/31/2023]
Abstract
Analysis of the structure functions of intensity fluctuations of scattered laser light was applied to monitor the phase separation in probed disperse media. UV-cured mixtures of a liquid crystal and prepolymer were studied during the formation of the structure of dispersive polymer-liquid crystal (DPLC) composites. The experimentally observed features of light beating induced by dynamic light scattering in DPLC systems (the scaling properties of the structure functions, the narrowing of the beating spectrum for certain weight fractions of the liquid-crystalline component) were interpreted in terms of the discrete scattering model using the results of statistical modeling.
Collapse
Affiliation(s)
- Dmitry A Zimnyakov
- Physics Department, Saratov State Technical University, Saratov, Russia.
| | | | | | | | | | | |
Collapse
|
20
|
Gong J, Uchida T, Yamazaki S, Kimura K. Morphology control of various aromatic Polyimidazoles-preparation of nanofibers. J Appl Polym Sci 2011. [DOI: 10.1002/app.33914] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
21
|
Wakabayashi K, Uchida T, Yamazaki S, Kimura K. Preparation of Poly(p-phenylenepyromelliteimide) Microspheres with Rugged Surfaces Using Crystallization During Isothermal Polymerization. MACROMOL CHEM PHYS 2010. [DOI: 10.1002/macp.201000510] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
22
|
Kimura K, Gong J, Kohama SI, Yamazaki S, Uchida T, Kimura K. Poly(2,5-benzimidazole) nanofibers prepared by reaction-induced crystallization. Polym J 2010. [DOI: 10.1038/pj.2010.20] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
23
|
Shen VK, Cheung JK, Errington JR, Truskett TM. Insights Into Crowding Effects on Protein Stability From a Coarse-Grained Model. J Biomech Eng 2009; 131:071002. [DOI: 10.1115/1.3127259] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Proteins aggregate and precipitate from high concentration solutions in a wide variety of problems of natural and technological interest. Consequently, there is a broad interest in developing new ways to model the thermodynamic and kinetic aspects of protein stability in these crowded cellular or solution environments. We use a coarse-grained modeling approach to study the effects of different crowding agents on the conformational equilibria of proteins and the thermodynamic phase behavior of their solutions. At low to moderate protein concentrations, we find that crowding species can either stabilize or destabilize the native state, depending on the strength of their attractive interaction with the proteins. At high protein concentrations, crowders tend to stabilize the native state due to excluded volume effects, irrespective of the strength of the crowder-protein attraction. Crowding agents reduce the tendency of protein solutions to undergo a liquid-liquid phase separation driven by strong protein-protein attractions. The aforementioned equilibrium trends represent, to our knowledge, the first simulation predictions for how the properties of crowding species impact the global thermodynamic stability of proteins and their solutions.
Collapse
Affiliation(s)
- Vincent K. Shen
- Physical and Chemical Properties Division, National Institute of Standards and Technology, Gaithersburg, MD 20899-8380
| | - Jason K. Cheung
- Biological and Sterile Product Development, Schering-Plough Research Institute, Summit, NJ 07091
| | - Jeffrey R. Errington
- Department of Chemical and Biological Engineering, The State University of New York at Buffalo, Buffalo, NY 14260-4200
| | - Thomas M. Truskett
- Department of Chemical Engineering, and Institute for Theoretical Chemistry, The University of Texas at Austin, Austin, TX 78712
| |
Collapse
|
24
|
Lee T, Cramer N, Hoyle C, Stansbury J, Bowman C. (Meth)Acrylate Vinyl Ester Hybrid Polymerizations. ACTA ACUST UNITED AC 2009; 47:2509-2517. [PMID: 19855853 DOI: 10.1002/pola.23327] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
In this study vinyl ester monomers were synthesized by an amine catalyzed Michael addition reaction between a multifunctional thiol and the acrylate double bond of vinyl acrylate. The copolymerization behavior of both methacrylate/vinyl ester and acrylate/vinyl ester systems was studied with near-infrared spectroscopy. In acrylate/vinyl ester systems, the acrylate groups polymerize faster than the vinyl ester groups resulting in an overall conversion of 80% for acrylate double bonds in the acrylate/vinyl ester system relative to only 50% in the bulk acrylate system. In the methacrylate/vinyl ester systems, the difference in reactivity is even more pronounced resulting in two distinguishable polymerization regimes, one dominated by methacrylate polymerization and a second dominated by vinyl ester polymerization. A faster polymerization rate and higher overall conversion of the methacrylate double bonds is thus achieved relative to polymerization of the pure methacrylate system. The methacrylate conversion in the methacrylate/vinyl ester system is near 100% compared to only ~60% in the pure methacrylate system. Utilizing hydrophilic vinyl ester and hydrophobic methacrylate monomers, polymerization-induced phase separation is observed. The phase separated domain size is on the order of ~1 μm under the polymerization conditions. The phase separated domains become larger and more distinct with slower polymerization and correspondingly increased time for diffusion.
Collapse
Affiliation(s)
- Taiyeon Lee
- University of Colorado, Department of Chemical and Biological Engineering, Boulder, CO 80309
| | | | | | | | | |
Collapse
|
25
|
Wakabayashi K, Uchida T, Yamazaki S, Kimura K. Preparation of Poly(4-phthalimide) Nanoribbon by Reaction-Induced Crystallization. Macromolecules 2008. [DOI: 10.1021/ma800874w] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kanji Wakabayashi
- Graduate School of Environmental Science and Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka Okayama, Japan 700-8530
| | - Tetsuya Uchida
- Graduate School of Environmental Science and Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka Okayama, Japan 700-8530
| | - Shinichi Yamazaki
- Graduate School of Environmental Science and Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka Okayama, Japan 700-8530
| | - Kunio Kimura
- Graduate School of Environmental Science and Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka Okayama, Japan 700-8530
| |
Collapse
|
26
|
Liu H, Qian HJ, Zhao Y, Lu ZY. Dissipative particle dynamics simulation study on the binary mixture phase separation coupled with polymerization. J Chem Phys 2007; 127:144903. [DOI: 10.1063/1.2790005] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
27
|
Application and New Developments in Polymer-Dispersed Liquid Crystal Simulation Studies. MACROMOL THEOR SIMUL 2007. [DOI: 10.1002/mats.200700008] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|