Article
Chemistry, Physical
Olessya P. Loiko, Johan P. A. Heuts, Alex M. van Herk
Summary: This article reports the synthesis of polymer-vesicle latex particles using extruded vesicles of DODAB via an atom transfer radical polymerization-based approach. Cryo-TEM characterization reveals that the final morphology of the particles is affected by monomer feed composition and chain length. Protrusions or nanocapsules were synthesized depending on the monomer combinations used.
COLLOID AND POLYMER SCIENCE
(2022)
Article
Polymer Science
Aurel Diacon, Edina Rusen, Florica Rizea, Adi Ghebaur, Daniela Berger, Raluca Somoghi, Andreea Matei, Petru Palade, Oana Tutunaru
Summary: The study developed an ATRP process for MMA polymerization using Fe(CO)(5) as co-initiator, demonstrating controlled characteristics and producing magnetic PMMA particles. The particles have porous characteristics and magnetic properties, making them suitable for use as catalyst supports, separation processes, or biomedical applications.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Polymer Science
Yi Wang, Francesca Lorandi, Marco Fantin, Krzysztof Matyjaszewski
Summary: Polymerizations in aqueous dispersed media benefit from good heat transfer, low viscosity, low content of volatile compounds, and established industrial use. The implementation of ATRP in dispersed media has highlighted the possibility of achieving improved livingness and producing a variety of macromolecular architectures. ATRP techniques employing low-ppm catalyst loadings have enabled access to a larger variety of polymer architectures and functional polymer particles, which have found applications in molecular recognition, drug delivery, bio-quantification, and advanced coatings.
Review
Polymer Science
Maneesh Kumar, Praveen Singh Gehlot, Deepika Parihar, Praveen K. Surolia, Gayatri Prasad
Summary: Cellulose is an abundant organic substance with various applications such as paperboard production, drug delivery, and food packaging due to its bio-renewable and bio-degradable properties. Radical polymerization is commonly used to create cellulose derivatives with improved properties, by reacting cellulose with small organic fragments like methacrylate and styrene. Initiators like Fenton's reagent and controlled radical polymerization methods are utilized to generate free radicals on the cellulose backbone for grafting purposes, allowing for the development of functional cellulose with enhanced physical and chemical properties.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Materials Science, Paper & Wood
Muhammad Asif Iqbal, Toheed Akhter, Muhammad Faheem, Asif Mahmood, Waheed Al-Masry, Sohail Nadeem, Sadaf Ul Hassan, Chan Ho Park
Summary: We synthesized a thermoresponsive polymer with a narrow molecular weight distribution using organic photo-redox-catalyzed atom transfer radical polymerization (O-ATRP). The O-ATRP was mediated by a photoredox catalyst 1,2,3,5-tetrakis (carbazol-9-yl)-4,6-dicyanobenzene (4CzIPN) under visible light irradiation. The polymerization of polymethyl methacrylate (PMMA) chains from a hydroxypropyl cellulose (HPC)-based macroinitiator was characterized using various analytical methods. The resulting PMMA-grafted HPC (PMMA-g-HPC) showed a widened lower critical solution temperature (LCST) window and an inverse pH dependency of the LCST, making it promising for various applications including drug delivery systems.
Article
Materials Science, Multidisciplinary
Aurel Diacon, Florica Rizea, Alexandra Mocanu, Adrian Dinescu, Cristina Stavarache, Luiza Izabela Jinga, Cristian N. Mihailescu, Edina Rusen
Summary: The aim of this study was to develop a photo-ATRP process using a novel photoinitiator and to analyze the kinetics of MMA polymerization. The photo-ATRP process in suspension was developed, and the obtained PMMA particles were used to initiate polymerizations in solution and on surfaces. The study showed controlled polymerizations and demonstrated a bimodal molecular weight distribution with temperature transitions.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2023)
Article
Polymer Science
Ergul Meyvaci
Summary: The poly[poly(ethylene glycol) methacrylate]-graft-poly(2-vinylpyridine) (PPEGMA-g-P2VP) comb-type graft copolymer was synthesized using the ATRP-macromonomeric initiator and 2-vinylpyridine monomer by applying atom transfer radical polymerization (ATRP) via grafting through strategy. The ATRP-MMI was obtained by homopolymerizing poly(ethylene glycol) methacrylate bromide in the presence of 2,2'-azobisisobutyronitrile by free radical polymerization (FRP) technique. The PPEGMA-g-P2VP comb-type graft copolymer was successfully prepared by ATRP method and the monomer concentration had an effect on dispersity and molecular weight.
JOURNAL OF POLYMER RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Christian Andersen, Libor Zverina, Koosha Ehtiati, Esben Thormann, Hanne Mordhorst, Sunje J. Pamp, Niels J. Madsen, Anders E. Daugaard
Summary: PDMS is a versatile material for biomedical devices, but its hydrophobic nature makes it prone to microbial colonization. This study presents a new method of introducing an ATRP initiator onto the PDMS surface and grafting PDMAEMA brushes using SI-SARA-ATRP to enhance antimicrobial properties. The fast reaction rate and increased antimicrobial activity demonstrate the potential for full-scale exploitation of PDMS in biomedical devices.
Article
Engineering, Chemical
Hui Ye, Yining Zhou, Guodong Yang, Tengfei Yu, Yuzhong Zhang, Lizhi Zhao, Qingping Xin, Shurui Han
Summary: In this study, a pH-responsive membrane was developed for protein fractionation. The membrane successfully separated different milk proteins by controlling the pH value.
POLYMER ENGINEERING AND SCIENCE
(2022)
Article
Engineering, Chemical
Ki Jung Kim, Yunmi Chae, Seong Jin An, Jin Hui Jo, Sungmin Park, Won Seok Chi
Summary: This study investigates microphase-separated structured PI-POEM graft copolymer membranes, which have controllable POEM concentrations and the ability to modify material properties. The results show that PI-POEM graft copolymer membranes exhibit high CO2 affinity and separation performance, making them promising for CO2 separation processes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Polymer Science
Amrish Kumar Padmakumar, Nikhil K. Singha, Muthupandian Ashokkumar, Frank A. Leibfarth, Greg G. Qiao
Summary: Advances in nanomolecular engineering have led to the development of technology using ultrasonic irradiation to initiate polymerization. In this study, ultrasound-assisted reversible addition chain-transfer (Sono-RAFT) polymerization was used to compare batch and continuous flow polymerization methods on monomer conversion, polymer molar mass, and dispersity using different monomer substrates. Results showed that continuous flow polymerization had higher monomer conversion compared to batch reactions under the same conditions. Continuous flow reactors with stainless-steel microreactors provided higher cavitation intensity and lower oxygen contamination, making Sono-RAFT possible at higher monomer concentrations. These findings have implications for mechanochemistry and the practical and sustainable implementation of sonochemically regulated polymerization.
Review
Engineering, Chemical
Miguel angel Vega-Hernandez, Gema Susana Cano-Diaz, Eduardo Vivaldo-Lima, Alberto Rosas-Aburto, Martin G. Hernandez-Luna, Alfredo Martinez, Joaquin Palacios-Alquisira, Yousef Mohammadi, Alexander Penlidis
Summary: This critical review focuses on the synthesis, characterization, and modeling of polymer grafting, pointing out that there is room for further research in this area despite existing understanding and efforts.
Article
Polymer Science
Xiaoqiang Xue, Mingjian Feng, Hongting Pu, Fangli Cheng, Wenyan Huang, Hongjun Yang, Li Jiang, Qimin Jiang, Bibiao Jiang, Sridhar Komarneni
Summary: In this study, well-defined branched polystyrenes (BPS) were synthesized by combining self-condensing atom transfer radical copolymerization (ATRP) and Diels-Alder (DA)/retro-Diels-Alder (r-DA) reactions. The controlled synthesis of BPS with different morphologies was achieved through temperature induction, and the resulting BPS exhibited distinctive rheological behaviors in the melt and solution.
Review
Polymer Science
Alfred K. K. Fung, Michelle L. Coote
Summary: Atom transfer radical polymerization has become one of the most dominant methods in controlled radical polymerization since its invention 25 years ago. The rise in importance is largely due to increases in scope, reduced catalyst loading, and improved oxygen tolerance. These developments have been underpinned by an improved understanding of the mechanism, kinetics, and structure-reactivity trends.
POLYMER INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Kun-Yu Wang, Liang Feng, Tian-Hao Yan, Jun-Sheng Qin, Chen-Xuan Li, Hong-Cai Zhou
Summary: Controlled morphology replication is a powerful method for creating materials with specific shapes and functions. This study presents a novel strategy for fabricating hierarchical metal-organic framework (MOF)-on-polymer hetero-architectures, which allows for the introduction of various sizes, distributions, and concentrations of MOFs into the polymer matrix. The compositions of both MOF and polymer components are highly tunable, resulting in a diverse library of MOF/polymer hetero-architectures.
ACS MATERIALS LETTERS
(2021)
Article
Engineering, Chemical
Anton B. Kornberg, Michael R. Thompson, Shiping Zhu
Summary: An approach using controlled crazing and post-polymerization was used to incorporate a nanoscaled conductive co-continuous network into commercial ENGAGE(TM) Polyolefin Elastomers (POEs). This approach involved stretching POE films in a reactive mixture of acrylic polymerization precursors to promote crazing and grow a rigid acrylic hydrogel phase. The hydrogel phase provided ion conductivity to the POE.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Editorial Material
Engineering, Chemical
Andrew Nick Hrymak, Robert Pelton, Shiping Zhu
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Engineering, Chemical
Yichen Wan, Wenlian Qiu, He Zhu, Qi Zhang, Shiping Zhu
Summary: Adhesive materials are extensively used in various industries, and the design principles for high-performance adhesives involve regulating adhesion and cohesion strengths. Compared to permanent covalent bonds, dynamic bonds, such as dynamic covalent and noncovalent bonds, are vulnerable to mechanical stimuli but rebuildable, making them promising for manipulating internal and interfacial energy. This review mainly focuses on discussing the application of dynamic bonds in adhesive materials to regulate adhesion and cohesion, and provides a perspective on future research directions for engineered construction of advanced adhesive materials.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Review
Engineering, Chemical
Kaka Zhang, Shuaishuai Huang, Qi Zhang, He Zhu, Shiping Zhu
Summary: POSS-based coatings have gained significant attention for their unique structure and desirable properties. The integration of the inorganic POSS cage with organic functional groups allows for different approaches to blend them with polymers. The resulting coatings exhibit excellent mechanical, anti-wetting, anti-corrosive, icephobic, and fire-retardant properties. This review focuses on the latest developments in POSS-based functional coatings and discusses their challenges and future research directions.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Jierui Wang, Jialin Yang, He Zhu, Bo-Geng Li, Shiping Zhu
Summary: The construction of MOF monoliths can overcome the limitations of MOF powders, such as pressure drop, mass transfer inefficiency, and operational complexities. However, challenges still exist in terms of pore clogging, pore structure tuning, and mechanical properties. In this study, nearly pure ZIF-8 monoliths with hierarchical pore structure were successfully prepared by converting amorphous ZIF-8/ZnO nanoparticles into continuous ZIF-8 skeleton. These monoliths exhibited low bulk densities, high BET surface areas, and good mechanical properties. They also demonstrated high catalytic activity and stability in a continuous flow reactor for the Knoevenagel reaction. This work presents a valuable approach for the application of MOF-based monoliths in adsorption, separation, catalysis, and effluent treatment.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Guoqing Chen, Xiwei Guo, Chang Yang, He Zhu, Qi Zhang, Shiping Zhu
Summary: This paper reports the preparation of a novel type of underwater adhesive through in situ coacervation using commercially available materials. The adhesive exhibits superstrong underwater adhesion and excellent water-resistant performance, making it suitable for versatile applications in different environments.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Computer Science, Artificial Intelligence
Qinyao Chang, Shiping Zhu
Summary: Inspired by human vision attention mechanism, this study proposes a saliency detection model, TSFP-Net, which utilizes multilevel features and time information to improve accuracy. The model extracts multiscale temporal-spatial features from input video frames and generates a saliency map through hierarchical decoding. Experimental results demonstrate that the proposed method outperforms state-of-the-art methods on video saliency benchmarks.
COGNITIVE COMPUTATION
(2023)
Article
Chemistry, Multidisciplinary
Lingqi Huang, De Tong, Hansheng Chen, He Zhu, Fei Zhang, Yifeng Sheng, Zhijun Hu, Tao Qian, Heyang Liu
Summary: A controlled thermal treatment approach was developed to prepare leaf-like hollow carbon materials with a porous shell and multiple faradaic reactive sites. Enhanced electrolyte adsorption/desorption and transport have been achieved when using these hollow carbon materials as cathode materials for aqueous zinc-ion capacitors (ZICs). The optimum assembled ZICs delivered high capacity, high energy density, and good cycling performance.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Physical
Heyang Liu, De Tong, Liangfen Peng, Lingqi Huang, Zilong Gu, Zhongyi Sheng, Fei Zhang, Yinhang Zhang, Zhijun Hu, Tao Qian, He Zhu
Summary: In this study, hierarchically porous carbon microspheres were prepared as cathodes for high-performance zinc-ion capacitors (ZICs) using ZIF-8-derived polymer composites as the template. The carbon materials obtained through hydro/solvothermal treatment of ZIF-8 with tetrafluoroterephthalonitrile followed by carbonization exhibited a high specific surface area, hierarchical pore distribution, and heteroatom dopants. The presence of heterogeneous phases in the polymer composites played a crucial role in the formation of the hierarchical pore structure in the carbon materials, enabling fast electrolyte ion diffusion. Additionally, trace amounts of zinc compounds trapped in the carbon induced pseudocapacitance, leading to enhanced electrochemical performance. The as-prepared ZICs showed a high specific capacitance, energy density, and excellent capacitance retention, indicating the potential of this polymer composite-templated protocol for carbon materials preparation in electrochemical energy storage and conversion applications.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Xiangyang Liu, Qi Zhang, He Zhu, Shiping Zhu
Summary: The increase in CO2 concentration in the atmosphere has led to global warming, and adsorption is considered an effective method for CO2 capture and stabilization. Metal-organic frameworks (MOFs) are promising materials for carbon capture, but using MOF powders directly may lead to practical issues. A phase inversion strategy is reported here to prepare SIFSIX-3-Ni@PAN composite beads with hierarchically porous structure and good mechanical stability. The obtained materials have high CO2 capture capacity even at low CO2 concentrations.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2023)
Article
Polymer Science
Wenlian Qiu, Yi Huang, He Zhu, Qi Zhang, Shiping Zhu
Summary: We report a biomimetic dry underwater adhesive that is free of catechol chemistry and can adhere well to various substrate surfaces underwater. The adhesive is prepared by ternary copolymerization of monomers with nonphenolic aromatic groups, cations, and polar side chains, and exhibits hydrophobicity, mechanical toughness, and good interfacial bonding in water.
