Results 1 to 10 of about 1,249 (114)

Tuning the upper critical solution temperature of acrylamide and acrylonitrile copolymers with ionic monomers [PDF]

Scientific Reports
In this research, poly(acrylamide-co-acrylonitrile) (poly(AAm-co-AN)) copolymers were synthesized by free radical polymerization to evaluate the upper critical solution temperature (UCST) of their aqueous solutions.
Hossein Najafi, Morteza Nasiri
doaj   +2 more sources

UCST-Activated Network Reinforcement in Hybrid Microgels for Smart Plugging [PDF]

Gels
Conventional polymer-based plugging materials often fail in deep-well environments due to passive thermal softening and network relaxation, which significantly compromise mechanical integrity and interfacial retention.
Mingliang Du, Huifeng He, Qingchen Wang, Keming Sheng, Guancheng Jiang, Yinbo He   +5 more
doaj   +2 more sources

UCST-Type Thermoresponsive Sol–Gel Transition Triblock Copolymer Containing Zwitterionic Polymer Blocks [PDF]

Gels
Thermoresponsive sol–gel transition polymers are of significant interest because of their fascinating biomedical applications, including as drug reservoirs for drug delivery systems and scaffolds for tissue engineering.
Akifumi Kawamura, Ryogo Takahashi, Takashi Miyata   +2 more
doaj   +2 more sources

Influence of cyclodextrin on the UCST- and LCST-behavior of poly(2-methacrylamido-caprolactam)-co-(N,N-dimethylacrylamide)

Beilstein Journal of Organic Chemistry, 2014
The monomer 2-methacrylamido-caprolactam (4) was synthesized from methacryloyl chloride (3) and racemic α-amino-ε-caprolactam (2). Copolymerization of 4 with N,N-dimethylacrylamide (5) was carried out by a free-radical mechanism using 2,2’-azobis(2 ...
Alexander Burkhart, Helmut Ritter
exaly   +2 more sources

Strong and Thermo‐Switchable Gel Adhesion Based on UCST‐Type Phase Transition in Deep Eutectic Solvent [PDF]

Advanced Science
It remains a great challenge to achieve strong and reversible hydrogel adhesion. Hydrogel adhesives also suffer from poor environmental stability due to dehydration.
Huiyao Xu, Haocheng Li, Yan Zhang, Ying Guan, Yongjun Zhang   +4 more
doaj   +2 more sources

Mechanically Reinforced Silica Aerogels via Thermally Induced Phase Separation of Poly(ethylene-co-vinyl Alcohol) [PDF]

Gels
Silica aerogels are highly attractive due to their outstanding properties, including their low density, ultralow thermal conductivity, large porosity, high optical transparency, and strong sorption activity.
Hainan Ma, Baomin Wang, Yongjun Zhang, Liquan Zheng   +3 more
doaj   +2 more sources

Mussel-inspired hydrogels with UCST for temperature-controlled reversible adhesion

Giant, 2023
Achieving on-demand adhesion on different surfaces remains an adaunting challenge for polymer adhesives. Herein, we report a temperature-controlled adhesion strategy of hydrogels based on the reversible exposure and shielding of adhesive promoters ...
Haiyan Zuo, Yaolong Yang, Dandan Zheng, Xiangfu Zhou, Lili Luo, Yu Liu, Weiang Luo, Guorong Chen, Birong Zeng, Yiting Xu, Conghui Yuan, Lizong Dai   +11 more
doaj   +1 more source

A Novel Method for the Preparation of Poly (Acrylamide-co-Acrylonitrile) Upper Critical Solution Temperature Thermosensitive Hydrogel by the Partial Dehydration of Acrylamide Grafted Polypropylene Sheets

Gels, 2022
In an attempt to find a potential application of cell culture harvesting, a novel method for the preparation of an upper critical solution temperature (UCST) thermosensitive hydrogel was studied. An electron accelerator was used as the electron beam (EB)
Yi Ling, Liuyuchen Chen, Mingjun Huang, Cheng Zhou, Liming Yang, Hejingying Niu, Li Su, Yuejiao Yang, Rogério P. Pirraco, Rui L. Reis, Jie Chen   +10 more
doaj   +1 more source

Thermo-sensitive self-assembly of poly(ethylene imine)/(phenylthio) acetic acid ion pair in surfactant solutions

Drug Delivery, 2022
Poly(ethylene imine)/(phenylthio) acetic acid (PEI/PTA) ion pairs exhibited an upper critical solution temperature (UCST) behavior in an aqueous solution and the UCST was higher as the PTA content was more.
Fanyu Zhao, Jin-Chul Kim
doaj   +1 more source

The Removal of Hydrophobic Matter from Thermosensitive Poly[oligo(ethylene glycol) Monomethyl Ether Acrylate] Gel Adsorbent in Alcohol–Water Mixtures

Gels, 2022
A thermosensitive gel that exhibits lower critical solution temperature (LCST) becomes hydrophilic at low temperatures and hydrophobic at high temperatures in water.
Syed Ragib Safi, Toshiki Kaneko, Katsuhiro Nakahara, Takehiko Gotoh, Takashi Iizawa   +4 more
doaj   +1 more source