Article
Chemistry, Applied
Stanko Kramer, Janja Stergar, Irena Ban, Jernej Imperl, Mitja Kolar, Peter Krajnc
Summary: In this study, hierarchically porous microspheres were successfully synthesized using a multiple emulsion templating method. The content of magnetic nanoparticles affected the morphology and size of the microspheres. The resulting porous microspheres exhibited excellent performance in removing Pb2+.
REACTIVE & FUNCTIONAL POLYMERS
(2023)
Article
Engineering, Chemical
Hande Barkan-Oeztuerk, Angelika Menner, Alexander Bismarck
Summary: Micromixers made from emulsion templated macroporous polymers were used to continuously produce polymerizable high internal phase emulsions. The poly-Pickering-HIPE micromixers resulted in effective mixing by creating local vortices and shear, and the volume fraction and porosity of the produced HIPE templates can be varied during the process.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Tzu-Hsuan Lo, Sheng-Sheng Yu
Summary: This work presents a new technique of using MIPE ink to prepare 3D printable porous polymeric monoliths with sub-micrometer pores, demonstrating high mechanical strength and the ability to be reprogrammed into complex geometries difficult for common DIW processes. The proposed technique provides a new route to fabricate hierarchically porous monoliths with a drastic change of pore dimension, high mechanical strength, and tunable shape reconfiguration.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2022)
Article
Polymer Science
Camille Bakkali-Hassani, Jordan P. Hooker, Pieter-Jan Voorter, Maarten Rubens, Neil R. Cameron, Tanja Junkers
Summary: In this study, a method for targeted synthesis of biodegradable polymer precursors via continuous flow reactions was reported. The obtained precursors exhibited well-defined structures and properties, and could be used as precursors for networks and emulsion preparation in materials synthesis. This research is of great significance for the targeted and tunable access to biodegradable polymers.
Article
Chemistry, Physical
Lukas Koch, Sophia Botsch, Cosima Stubenrauch
Summary: The study synthesized monodisperse macroporous polymers with non-spherical pores and layered pore walls through emulsion polymerization. The formation of this morphology was found to be caused by surfactant diffusion and phase separation during polymerization. The experiment results indicated that the diffusion of surfactant molecules during polymerization affected the shape of the pores and the thickness of the layers.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Qi Li, Mayumi Hatakeyama, Takuya Kitaoka
Summary: This study presents a novel approach to fabricate aligned porous scaffolds for 3D cell cultures using Pickering emulsion-induced interface and freezing/lyophilization techniques. The resulting scaffolds exhibit highly porous and oriented structures, and show good biocompatibility for human liver cell culture.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Sebastijan Kovac, Bettina Schafzahl, Nadejda B. Matsko, Katharina Gruber, Martin Schmuck, Stefan Koller, Stefan A. Freunberger, Christian Slugovc
Summary: This work demonstrates the potential of pDCPD-based foams and hierarchically porous carbons as lightweight, tough, and stable matrix materials. The carbon foams exhibit uniform shrinkage, high porosity, and conductivity, while preserving the porous structure and 3D interconnectivity during carbonization. These materials show outstanding performance in Li-O2 batteries.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Polymer Science
Prachi Dhavalikar, Jason Shenoi, Karim Salhadar, Malgorzata Chwatko, Gabriel Rodriguez-Rivera, Joy Cheshire, Reza Foudazi, Elizabeth Cosgriff-Hernandez
Summary: This study systematically investigated the effects of common emulsion parameters on pore architecture, showing that changes in surfactant concentration had the largest impact on pore size. Additionally, organic phase viscosity significantly influenced pore size, while no clear trend was observed with molecular hydrophobicity. The use of 1,4-butanedithiol as a reactive diluent was found to reduce organic phase viscosity and increase pore size without affecting polymer fraction, which can help accelerate the design of polyHIPE architectures.
Article
Chemistry, Multidisciplinary
Zahra Abbasian Chaleshtari, Hamed Salimi-Kenari, Reza Foudazi
Summary: The current study investigates the colloidal behavior of nanoemulsions at different oil volume fractions and reveals the transition of nanoemulsions from liquid-like to viscoelastic gels at a volume fraction of 30%. Additionally, two regimes of colloidal interactions are proposed in the semidilute and concentrated regimes based on rheological results and pairwise interactions estimated between droplets.
Article
Polymer Science
Muchu Zhou, Alireza Bandegi, Reza Foudazi
Summary: The interconnectivity of porous polymers obtained from polymerized high internal phase emulsions (polyHIPEs) can be controlled by varying the attractive interdroplet interactions in the HIPE precursor.
Article
Materials Science, Ceramics
Binbin Dong, Li Wang, Zhiyu Min, Qingfeng Wang, Chaofan Yin, Tiekun Jia, Yujiang Wang, Xichen Zheng, Feihong Wang, Hamidreza Abadikhah, Xin Xu, Yongliang Zhang, Gang Wang
Summary: This study presents a novel method for fabricating porous Al2O3 membrane substrates with customizable pore size and high gas and water permeation. By adjusting the volume ratio of water and oil, the pore size and porosity can be controlled. This research is of great importance for the development of membrane technology.
CERAMICS INTERNATIONAL
(2022)
Article
Polymer Science
Rotem Horowitz, Melissa Lamson, Orit Cohen, Travis B. Fu, Julia Cuthbert, Krzysztof Matyjaszewski, Michael S. Silverstein
Summary: PolyHIPEs are macroporous polymers synthesized within high internal phase emulsions, stabilized using stars and crosslinked with polyhedral silsesquioxane (POSS) to produce shape memory polymer foams.
Article
Engineering, Chemical
Hande Barkan-Ozturk, Angelika Menner, Alexander Bismarck, Robert T. Woodward
Summary: Porous polymers with organophosphorus functionalities were synthesized using particle and surfactant stabilized emulsion templates followed by low-cost hypercrosslinking strategies. The resulting polyHIPEs displayed high surface areas and phosphorus concentrations, and showed excellent catalytic performance in a Suzuki-Miyaura coupling reaction. The coarse powder form of the polyHIPEs allowed for easy catalyst recovery and reuse.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Nika Vrtovec, Sarah Jurjevec, Natasa Zabukovec Logar, Matjaz Mazaj, Sebastijan Kovacic
Summary: Metal-organic (MOF)-polymer composites have attracted great interest for their potential in industrial applications. This study focuses on the combination of MOFs and polymerized high internal phase emulsions (polyHIPEs) to create highly porous composite materials. By using a hybridization method, MOFs can be grown in the polyHIPEs, resulting in a hierarchical structure with excellent mechanical stability and enhanced CO2 capture performance compared to pure MOFs. The composites also show fast adsorption and desorption kinetics, as well as high regeneration capacity.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Chemical
Mohammad Abshirini, Mrinal C. Saha, Laura Cummings, Thomas Robison
Summary: The effects of different surfactants on the porous PDMS structure were studied, revealing interconnected pores in the porous PDMS prepared from emulsions with an internal phase larger than 30%, with pore frequency and size dependent on the surfactant types.
POLYMER ENGINEERING AND SCIENCE
(2021)
Article
Materials Science, Paper & Wood
Tao Zhang, Yan Zhao, Michael S. Silverstein
Article
Chemistry, Multidisciplinary
Michael S. Silverstein
ISRAEL JOURNAL OF CHEMISTRY
(2020)
Article
Polymer Science
Michael S. Silverstein
Article
Polymer Science
Rotem Horowitz, Melissa Lamson, Orit Cohen, Travis B. Fu, Julia Cuthbert, Krzysztof Matyjaszewski, Michael S. Silverstein
Summary: PolyHIPEs are macroporous polymers synthesized within high internal phase emulsions, stabilized using stars and crosslinked with polyhedral silsesquioxane (POSS) to produce shape memory polymer foams.
Article
Polymer Science
Aurelie Ohana Benaddi, Orit Cohen, Krzysztof Matyjaszewski, Michael S. Silverstein
Summary: PolyHIPEs are porous polymers synthesized within high internal phase emulsions, with their properties being influenced by polymerization mechanism, initiator solubility, RAFT agent to initiator ratio, and crosslinking comonomer content. The use of surface-active RAFT agent can significantly enhance the structure of PolyHIPE. Substituting RAFT for FRP can lead to significant changes in thermal, mechanical, and uptake behaviors.
Editorial Material
Polymer Science
Michael S. Silverstein
Article
Polymer Science
Adi Horowitz, Gil Shaul, Michael S. Silverstein
Summary: This paper describes the generation of carbonaceous monoliths with hierarchically porous structures and nitrogen functionalities using a combination of hydrogel synthesis and hydrothermal carbonization. Different activation methods lead to variations in specific surface area and residual mass, while nitrogen-rich monomers result in different N/C ratios in the carbon monoliths. The hierarchically porous structures and chemical structures of these monoliths can be fine-tuned by modifying the composition and processing conditions of the high internal phase emulsions (HIPEs).
POLYMER INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Inna Berezovska, Katya Kapilov, Prachi Dhavalikar, Elizabeth Cosgriff-Hernandez, Michael S. Silverstein
Summary: PolyHIPEs are highly porous polymers synthesized within high internal phase emulsions, while Pickering HIPEs are an alternative stabilization strategy using solid nanoparticles. The successful design of an HIPE stabilization system based on a combination of nanoparticles and reactive surfactants generates the desired surface functionality and low leachable content.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2021)
Article
Polymer Science
Inna Berezovska, Rajashekharayya A. Sanguramath, Michael S. Silverstein
Summary: Low-density macroporous monoliths based on unmodified beta-cyclodextrin were synthesized using emulsion templating, with high beta-CD contents (up to 63 wt%) and BPA adsorption capacities up to 117.7 mg g(-1).
JOURNAL OF POLYMER SCIENCE
(2022)
Article
Polymer Science
Sima Israel, Michal Levin, Sapir Oliel, Dahiana Mayer, Idan Lerner, Michael S. Silverstein
Summary: Hierarchically porous polymers were generated by combining emulsion-templated macroporous polymers with simultaneous Friedel-Crafts hyper-cross-linking and porogen removal. Different structures of polymer networks were synthesized to control the micro/meso-porosity and thermal stability of the materials.
Article
Polymer Science
Natalie Rosen, Hila Toledo, Michael S. Silverstein
Summary: PolyHIPEs encapsulated calcium chloride hexahydrate (CCHH) within elastomeric, emulsion-templated polymers, demonstrating the successful encapsulation of molten salt hydrates. The addition of a nucleating agent reduced supercooling and modifying the external phase enhanced HIPE stability. The resulting system showed high encapsulation efficiency, low supercooling, and negligible phase transformation.
Article
Materials Science, Multidisciplinary
Orit Cohen, Kristina Vetlitsyna-Novikova, Hila Toledo, Michael S. S. Silverstein
Summary: PolyHIPEs with high internal phase emulsion (HIPEs) templates were synthesized using PIM-like linear polymers. The addition of cross-linking comonomer resulted in monoliths with low density and highly interconnected structures. These polyHIPEs showed high adsorption capacity for cationic dyes.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Rachele Castaldo, Inna Berezovska, Michael S. Silverstein, Gennaro Gentile
Summary: PolyHIPEs templated with HCLRs exhibit advanced sorbent systems due to the synergistic combination of the adsorption capabilities of micro/mesoporous HCLRs and the absorption capacities of polyHIPEs. The amino-functionalized HCLRs significantly enhance the specific surface areas and sorption capacities of polyHIPEs for polar VOCs and CO2. The addition of HCLRs does not negatively affect the high uptake of organic solvents by polyHIPEs, and regenerability above 99% is achieved in five sorption cycles.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Materials Science, Biomaterials
Prachi Dhavalikar, Dana Jenkins, Natalie Rosen, Aparajith Kannapiran, Karim Salhadar, Orren Shachaf, Michael Silverstein, Elizabeth Cosgriff-Hernandez
Summary: This study explored the use of hydroxyapatite nanoparticles as an alternative stabilizer for emulsion-templated foams used as injectable bone grafts. It was found that a co-stabilization approach with both surfactant and nanoparticles can achieve large, interconnected pores and improved cell attachment. The concentration of hydroxyapatite nanoparticles and surfactant in the scaffolds affects the microarchitecture and cell behavior.
JOURNAL OF MATERIALS CHEMISTRY B
(2023)
Article
Polymer Science
Katya Kapilov-Buchman, Tslil Bialystocki, Danna Niezni, Luba Perry, Shulamit Levenberg, Michael S. Silverstein
Summary: PolyHIPEs are macroporous polymers templated within high internal phase emulsions (HIPEs), synthesized through urethane reactions between diisocyanates and oligomeric polyols in water-in-oil (w/o) HIPEs. The thermal transitions and mechanical properties of PolyHIPEs can be fine-tuned by adjusting the polyol macromolecular structure and molecular weight, as well as the urea content. The degradation of PolyHIPEs in 3 m NaOH demonstrated that PCL-based PUUs degrade more rapidly, and cells grown in PolyHIPEs adhered to walls, spread, and penetrated into porous structures.
Article
Polymer Science
Yuanzhang Jiang, Xuyi Wang, Yanting Han, Dakai Gong, Yingchun Gu, Lin Tan
Summary: In this study, FeCl3 and poly(acrylic acid) (PAA) were doped into waterborne polyurethanes (WPUs) to create multifunctional materials with self-healing and antimicrobial properties. WPU/Fe/PAA-5.5, containing 5.5 wt % PAA, exhibited excellent mechanical properties, strong self-healing capabilities, and an impressive antimicrobial rate of over 90%. These supramolecular films were also highly recyclable through hot-pressing.
Article
Polymer Science
Longyu Tian, Min Wang, Guangming Liao, Baoliang Liu, Sujuan Zhang, Yucheng Sun, Zhen Meng, Jintao Zhang, Zaijun Lu
Summary: Two kinds of benzoxazine monomers were synthesized and used to prepare polybenzoxazine anion exchange membranes (AEMs) with quaternary ammonium functionalization. The LQPBZ AEM exhibited better ion conductivity and alkaline stability.
Article
Polymer Science
Claire A. Lemarchand
Summary: This study investigates the shock behavior of three different polymers through molecular dynamics simulations. The results reveal specificities in the shock behavior of polymers, including deviations from the linear relation between shock velocity and particle velocity, as well as differences in shear stress relaxation behind the shock front. It is found that the deviation of the Hugoniot locus is related to the change in the relative contribution of bonding and non-bonding potential energies, while polymers with higher glass transition temperatures exhibit slower shear stress relaxation.
Article
Polymer Science
Zengquan Liu, Xiaochun Yin, He Zhang, Shuo Gao, Qinglin Kuang, Yanhong Feng
Summary: A powder solid-state extension (PSSE) technology was proposed to address the high melt viscosity issue of UHMWPE. By uniaxial extension and sintering in the solid state, a highly self-reinforced material was prepared. X-ray diffraction and scattering techniques were used to study the structural evolution during the PSSE process, and a solid-phase induced transformation model was established.
Article
Polymer Science
Zhike Li, Anyu Luo, Rui Zhou, Xin Li, Haiyan Li
Summary: A novel high temperature resistance IL@SiO2 nanocapsules were successfully prepared and their friction and wear properties in PA6 composites were studied. The addition of IL@SiO2 nanocapsules reduced the friction coefficient and wear rate without affecting the mechanical properties of PA6. The synergy between the IL core and SiO2 wall in the nanocapsules improved the self-lubricating performance of the PA6 composites.
Article
Polymer Science
Xin Liu, Xuhong Guo, Qi Liao
Summary: In this study, an algorithm for accurately estimating viscosity is developed using molecular dynamics simulations and the Green-Kubo formula. This algorithm can be applied to complex systems with long correlations, such as macromolecular and biological simulation systems.
Article
Polymer Science
Hao Pu, Yun-Lei Hou, Jing -Zhou Chen, Dong -Lin Zhao
Summary: The use of modified graphene improves the interfacial adherence of carbon fibers to epoxy resin, resulting in enhanced interfacial and bending properties of CF and matrix in CF/EP composites, as well as increased interlaminar shear strength and flexural strength.
Article
Polymer Science
Wei-Chung Ke, Jin-Wei Lin, Manohar Reddy Busireddy, Yueh-Hsing Lee, Jiun-Tai Chen, Chain-Shu Hsu
Summary: This study introduces a crosslinkable monomer, TAIC, to synthesize three crosslinked polyimide films, which exhibit improved thermal, mechanical, and dielectric properties. The introduction of TAIC enhances the tensile strength, reduces the dielectric constant and dielectric loss, and decreases the coefficient of thermal expansion of the polyimide films.
Article
Polymer Science
Alex Kwasi Kumi, Ruiling Fan, Ye Chen, Yumei Zhang
Summary: The difference in leaching of amylopectin from cellulose/amylopectin/1-butyl-3-methylimidazolium chloride ([Bmim][Cl]) blends during regeneration in water and aqueous ethanol has been studied. Molecular dynamics simulations showed that the dissolution and regeneration mechanisms of amylopectin in [Bmim][Cl] are similar to cellulose in ionic liquids. Water regeneration leads to weak electrostatic interactions, resulting in high leaching of amylopectin. In contrast, ethanol-water interactions enhance electrostatic interactions among amylopectin chains, limiting amylopectin leaching in aqueous ethanol.
Article
Polymer Science
Xi Zeng, Junwei Zhou, Junbiao Peng, Chunsheng Zhang, Danling Wang, Yihu Song, Qiang Zheng
Summary: This study utilizes an oligomer deep eutectic solvent (DES) based on polyethylene glycol to regulate the vulcanization kinetics of rubber. The results show that the DES can accelerate vulcanization at low temperatures without affecting the crosslinking density and Mullins effect.
Article
Polymer Science
Qianqian Yue, Yongfei Peng, Xingjian Liu, Aihua He, Huarong Nie
Summary: The addition of metal deactivators can effectively suppress the aging of TBIR, prolong its lifespan, and have no negative effects on its physical and processing properties. These research findings are of great importance for improving the stability and aging resistance of polymers.
Article
Polymer Science
J. Gomez-Caturla, J. Ivorra-Martinez, R. Tejada-Oliveros, V Moreno, D. Garcia-Garcia, R. Balart
Summary: This work focuses on the development of environmentally friendly PLA formulations by using different esters derived from geraniol as plasticizers. The results show that these esters have good compatibility with PLA, and they can effectively enhance the elongation and plasticity of PLA, reduce its glass transition temperature, and slightly improve its water absorption capabilities.
Article
Polymer Science
Dandan Li, Zhaohui Lu, Zhao Ke, Ke Xu, Fengna Dai, Youhai Yu, Guangtao Qian, Chunhai Chen
Summary: In this study, cross-linked PI aerogel membranes with low dielectric constant and high moisture resistance were prepared by co-polymerization and scraping coating technology. The incorporation of fluorinated blocks and benzimidazole ring structures resulted in novel PI aerogel membranes with fascinating dielectric properties and outstanding moisture resistance.
Article
Polymer Science
Zhaoyang Chu, Qing Zhang, Haihua Luo, Han Zhou, Fapei Zhang, Wei Chen, Wenhua Zhang
Summary: Multi-physical fields solution processing strategy is a universal and facile method for preparing various conjugated polymer films and high-performance devices. In this study, we employed a combined microfluidic flow and ultrasonication strategy (FU) for processing CP solutions, and found a pronounced synergetic effect in promoting the pre-ordering of chains in solution. The conformation order and anisotropy of the solution were revealed through various characterizations. A non-classical nucleation model for polymer crystallization in non-equilibrium solution processing was confirmed. The roles of microfluidic flow and ultrasonication in chain aggregation and crystallization were addressed through multi-physical simulations. Compared to pristine solutions, the FU strategy showed improved solution anisotropy and crystallization kinetics, resulting in higher crystallinity in films and increased mobilities in OFET devices. The FU processing strategy provides a universal approach for regulating chain conformation and aggregation in conjugated polymer solutions.