Article
Chemistry, Physical
Xuan Zhang, Lucas P. Kreuzer, Dominik M. Schwaiger, Min Lu, Zhengwei Mao, Robert Cubitt, Peter Mueller-Buschbaum, Qi Zhong
Summary: The abnormal rapid dehydration and rehydration of light- and thermo-dual-responsive copolymer films are triggered by UV radiation and dependent on the existence of hydrogen bonds. The UV-induced dehydration is 100 times faster than thermal stimulus-induced dehydration, with an immediate rehydration upon removal of UV radiation. This phenomenon is attributed to the configuration change causing a breaking of the intermolecular hydrogen bonds between the copolymer segments and water molecules.
Article
Nanoscience & Nanotechnology
Xuan Zhang, Panpan Zhang, Min Lu, Dongming Qi, Peter Mueller-Buschbaum, Qi Zhong
Summary: Enhanced synergistic stain removal can be achieved by optimizing the ratio of light- and thermo-responsive components in the copolymer, leading to a significant reduction in the consumption of chemical detergents and energy during laundry.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Polymer Science
Emre Tekay
Summary: Thermally-triggered shape memory polymers (SMPs) can change shape when exposed to heat. Blending PEO and SIS thermoplastic elastomers resulted in a 60PEO/40SIS blend with the best shape memory performance, showing 95.74% shape fixing and 98.98% shape recovery. The presence of semi-crystalline PEO improved shape fixing, while SIS content enhanced shape recovery capability, despite the immiscibility of these polymers.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2021)
Article
Biochemistry & Molecular Biology
Theodore Sentoukas, Costas Demetzos, Stergios Pispas
Summary: The study aims to prepare stimuli-responsive chimeric liposomes containing functional copolymers and conduct aqueous solution studies to determine their self-assembly properties and potential as drug delivery carriers. This involved synthesizing copolymers, preparing chimeric liposomes, and loading drugs to investigate their properties in aqueous solutions.
JOURNAL OF LIPOSOME RESEARCH
(2021)
Article
Polymer Science
Sisi Chen, Mengyao Zhang, Qingyuan Li, Jiachen Li, Shengpeng Wu, Jian Zhou, Guoqing Jin, Zhengbiao Zhang, Xiangqiang Pan, Jian Zhu
Summary: Liquid crystal elastomers (LCEs) are versatile polymer materials used in various applications, but the contradiction between reprogrammability and stable actuation performance remains a challenge. Introducing photoactivated dynamic covalent bonds (DCBs) into thermotropic LCEs can help address this issue. This study utilizes allyl selenide chemistry to achieve multiple network reconfigurations of LCEs under visible light conditions (405-450nm). The mild stimulation conditions and sustainable dynamic exchange capability offer great potential for the application and design of covalently adaptable LCEs.
Article
Polymer Science
E. Tarabukina, V Harabagiu, G. Fundueanu, M. Constantin, A. Filippov
Summary: A pH-sensitive monomer, N-acryloyl-L-valine, was synthesized and used to prepare a copolymer for analysis. The study found that the copolymer exhibited different phase separation temperatures in aqueous solutions under different acidity conditions.
JOURNAL OF POLYMER RESEARCH
(2021)
Article
Polymer Science
Aleksey D. Drozdov
Summary: This study investigates five potential candidates to replace PNIPAm in biomedical and biotechnological applications by studying their equilibrium swelling properties and comparing them with substituted acrylamide gels. The (co)polymers are divided into three groups based on the strength of hydrophobic interactions, showing different responses at and above the volume phase transition temperature.
Article
Polymer Science
Tomohisa Watanabe, Yubo Wang, Tomoko Ono, Satoru Chimura, Takuya Isono, Kenji Tajima, Toshifumi Satoh, Shin-ichiro Sato, Daichi Ida, Takuya Yamamoto
Summary: The topology effects of cyclization on thermal phase transition behaviors were investigated for amphiphilic Pluronic copolymers. It was found that the effect of cyclization on cloud point and critical temperature depended on the block sequence.
Article
Polymer Science
Jianhao He, Wenjie Zhang, Chunna Lv, Ruyi Chen, Linan Wang, Yudong Wang, Xiangcheng Pan
Summary: Thermo and pH-responsive star-like block copolymers were synthesized via photoinduced atom transfer radical polymerization with controlled molecular weight and low dispersity using a low ppm level of CuBr2 /tris[2-(dimethylamino)ethyl]amine (Me6TREN) complex. The polymers exhibit both lower critical solution temperature (LCST) transition in water and upper critical solution temperature (UCST) transition in ethanol, with UCST decreasing and LCST increasing based on the composition of side chains and pH in water. These polymers have great biocompatibility, mild phase transition temperature, and adjustable LCST with pH in organisms, making them potential candidates for pH-responsive and thermosensitive applications and as nanoreactors for inorganic nanoparticles growth.
Article
Polymer Science
Yu-Xuan Zhang, Jie Huang, Jun Zhang, Ning Ren, Gang-Sheng Tong, Xin-Yuan Zhu
Summary: A series of polypeptoids with dual photo/thermo-responsiveness were prepared by incorporating both azobenzene (Azo) group and oligo(ethylene glycol) (OEG) segment into the side chains. UV/Vis photo-responsive behaviors were achieved by cis-trans photoisomerization of the Azo group, while the thermo-responsive behaviors were realized by both OEG segment and Azo group. This study demonstrates the potential of polypeptoids as smart materials that can respond to different environmental stimuli.
CHINESE JOURNAL OF POLYMER SCIENCE
(2023)
Article
Polymer Science
Daniela de Morais Zanata, Maria Isabel Felisberti
Summary: A series of thermo- and pH-responsive triblock copolymers were synthesized and their phase behavior was comprehensively studied. The copolymers exhibited self-assembly into different aggregates depending on pH and temperature conditions.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Polymer Science
Xuan Xue, Feifei Wang, Minhao Shi, Faez Iqbal Khan
Summary: This study demonstrates a method for synthesizing reversible RAFT dispersion polymerized thermo-responsive copolymers and functionalizing them for bioactive applications. The copolymers maintain a worm-like morphology and thermo-responsive properties in aqueous solution, showing potential for biomedical applications.
Article
Spectroscopy
Ruey-Shin Juang, Kuan-Syun Wang, Yu-Wei Cheng, Wei-En Wu, Yu-Hsuan Lin, Ru-Jong Jeng, Li-Ying Huang, Ming-Chien Yang, Shou-Hsuan Liu, Ting-Yu Liu
Summary: Thermo-responsive Raman-enhanced nanocapsules were successfully fabricated, utilizing the change from hydrophilicity to hydrophobicity at different temperatures to enhance the sensitivity of surface-enhanced Raman scattering. By optimizing the ratio of AuNPs and F127, the SERS detection effect was significantly improved, enabling rapid detection of various biomolecules.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Review
Chemistry, Multidisciplinary
Ki Yan Lam, Choy Sin Lee, Mallikarjuna Rao Pichika, Sit Foon Cheng, Rachel Yie Hang Tan
Summary: This review introduces polyurethane (PU) as a smart material that can be upgraded by introducing light-sensitive moieties, resulting in a wide range of physical, mechanical, and chemical changes upon exposure to different wavelengths of light. Despite its wide applications in various industries, the responsiveness of PU has rarely been reviewed.
Article
Polymer Science
Roman Solovov, Anfisa Kazberova, Boris Ershov
Summary: The molar mass of nitrocellulose was successfully determined using the dynamic light scattering method. The methodology for fractionating nitrocellulose in acetonic solutions and obtaining six polymer fractions with monomodal distribution is described. It was found that the unfractionated colloxylin had a polymodal molar mass distribution, with mass average molecular mass values of 87.3 +/- 14.1, 28.3 +/- 7.3, and 0.54 +/- 0.17 kDa when investigated by the dynamic light scattering method. The viscometric method provided an integral viscosity average molar mass of 56.7 +/- 5.8 kDa.
Article
Chemistry, Applied
Xiaodan Wu, Zihan Wang, Guansong Shao, Bingyang Qin, Ying Wang, Tao Wang, Zhiguo Liu, Yujie Fu
Summary: In this study, a new type of cellulose-based ionic imprinting adsorbent was developed for the selective removal of cobalt ions. The adsorbent exhibited excellent adsorption performance, high cycling stability, and preferential selectivity for cobalt ions. The simple preparation method and promising application prospects make it a promising candidate for water treatment.
REACTIVE & FUNCTIONAL POLYMERS
(2024)
Article
Chemistry, Applied
Chandirasekar Shanmugam, Vanitha Marimuthu, Nagappan Rajendiran
Summary: In this study, monodispersed gold and silver nanoparticles were synthesized using cholic acid functionalized star poly(DL-lactide) as a capping and reducing agent. The synthesized materials were found to be effective heterogeneous catalysts for the reduction reaction.
REACTIVE & FUNCTIONAL POLYMERS
(2024)
Article
Chemistry, Applied
Bianca-Iulia Ciubotaru, Mirela-Fernanda Zaltariov, Mihaela Dascalu, Adrian Bele, Alexandra Bargan, Maria Cazacu
Summary: Porous networks were obtained using polysiloxanes pendant functionalized with aminopropyl groups. The addition of certain substances, such as ammonium bicarbonate and acetic acid, promoted the porosity and covalent cross-linking of the polymer. The resulting materials exhibited high dielectric permittivity and significant electrical output signal when subjected to compression, making them suitable for capacitive pressure sensors.
REACTIVE & FUNCTIONAL POLYMERS
(2024)
Article
Chemistry, Applied
Mohamed A. Zein, Basim H. Asghar, Abdulaziz M. Almohyawi, Norah F. Alqahtani, Ahmed Alharbi, J. Alkabli, Reda F. M. Elshaarawy, Lamia A. Ismail
Summary: In this study, new amphiphilic chitosan-thyme extract-nanosilver nanocomposites were prepared, which synergistically inhibited bacterial biofilm formation and bacterial proliferation. The nanocomposites disrupted bacterial cell membranes, causing cell death, and prevented biofilm formation. In addition, the nanocomposites exhibited good biocompatibility, making them potential candidates for biomedical applications.
REACTIVE & FUNCTIONAL POLYMERS
(2024)
Review
Chemistry, Applied
Norah F. Alqahtani
Summary: This review explores the potential of Imidazolium-based ionic liquids (ImILs) in improving the solubility, stability, and functionality of chitosan, and provides an overview of the types and preparation methods of functionalized imidazolium ionic liquids (FImILs). Additionally, it discusses the various opportunities offered by FImIL-chitosan derivatives.
REACTIVE & FUNCTIONAL POLYMERS
(2024)
Article
Chemistry, Applied
Olesya N. Zabegaeva, Alexey F. Kosolapov, Sergei L. Semjonov, Mariam G. Ezernitskaya, Egor S. Afanasyev, Ivan A. Godovikov, Alexander Chuchalov, Dmitriy A. Sapozhnikov
Summary: Polyimides are commonly used as primary protective coatings for optical fibers in high-temperature applications. However, the manufacturing process is complicated due to certain drawbacks. This study shows the potential use of polyamide-imides as highly reliable protective coatings for optical fibers.
REACTIVE & FUNCTIONAL POLYMERS
(2024)
Article
Chemistry, Applied
Luis Miguel Nunez Tapia, Pascal Thebault, Laurent Bischoff, Alain Ledoux, Florian Defontaine, Olivier Lesouhaitier, Fabrice Burel
Summary: A water soluble cationic bis-cyclocarbonate was prepared through a three steps procedure, and non-isocyanate polyurethanes were prepared in acetonitrile with high yields. The resulting materials exhibited good thermal properties and hydrophilic properties. The polyurethane thermoset showed high inhibition towards bacteria, and the bis-cyclocarbonate oligomer was found to be harmless to organisms.
REACTIVE & FUNCTIONAL POLYMERS
(2024)