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Macromolecular Rapid Communications

Xiaohan Wu, Jiachen Zhou, Jia Huang
Sensors based on organic thin-film transistors (OTFTs) present various advantages, including high sensitivity and mechanical flexibility, thus possessing potential applications such as wearable devices and biomedical electronics for health monitoring, etc. However, such applications are partially limited by the biocompatibility, biodegradability, and sensitivity to target analytes of OTFT-based sensors, which can be improved by the incorporation of diverse biomaterials. This article presents a brief review from the viewpoint of the type of the integrated biomaterials, including naturally occurring biomacromolecules such as proteins, enzymes, and deoxyribonucleic acid, as well as biocompatible polymers such as polylactide, poly(lactide-co-glycolide), poly(ethylene glycol), cellulose, polydimethylsiloxane, parylene, etc...
May 22, 2018: Macromolecular Rapid Communications
Guoqing Chang, Wajid Ullah, Yunfeng Hu, Liwei Lin, Xu Wang, Chang-Zhi Li
The formulation of optoelectronic components into 1D nanostructures allows the promotion of new materials with multifunctionalities. In this work, it is demonstrated that new synthesis of photocatalytic carbon nanofiber decorated with semi-embedded titanium oxide (TiO2 ), namely, TiO2 @carbon fiber, is conveniently accessed through the electrospinning of polyacrylonitrile polymer and TiO2 particle comixture, and then followed by photon-activated self-erosion to expose the embedded TiO2 and carbonization. The hybrid nanofibers are characterized by field emission scanning electron microscopy, transmission electron microscopy, and X-ray diffraction analysis...
May 22, 2018: Macromolecular Rapid Communications
Didier Gigmes, Paul H M Van Steenberge, Didier Siri, Dagmar R D'hooge, Yohann Guillaneuf, Catherine Lefay
The radical copolymerization of vinyl and cyclic ketene acetal (CKA) monomers is a promising way to prepare degradable vinyl polymers. The reactivity of the comonomer pair is known to be dependent of the vinyl monomer structure that requires to play with experimental conditions (feed ratio, overall monomer conversion, etc.) to target a desired cumulative (average) copolymer composition. Even if the materials are completely degradable, there is no information about the homogeneity of the degraded products. This theoretical study, using kinetic Monte Carlo simulations, allows simulating degradation at the molecular level...
May 22, 2018: Macromolecular Rapid Communications
Edmondo M Benetti
The fabrication of polymer brushes via surface-initiated controlled radical polymerizations has progressively developed beyond a simple surface functionalization technique, enabling the design of complex polymer interfaces with a quasi-3D molecular organization. The modulation of polymer brush structure has led to an extremely broad tuning potential for technologically relevant interfacial, physicochemical properties, allowing one to precisely tune swelling, nanomechanical, and nanotribological characteristics of polymer films...
May 22, 2018: Macromolecular Rapid Communications
Pengyu Li, Qianfang Yao, Baozhong Lü, Guiping Ma, Meizhen Yin
A photoresponsive host-guest supramolecular complex (WP5⊃G) constructed by water-soluble pillar[5]arene (WP5) and spiropyran derivative (G) is presented. The spontaneous isomerization of G from spiropyran (SP) form to ring-opened merocyanine (MC) form happens either alone or in WP5⊃G in aqueous media. Irradiated by visible light, G can be converted into SP form completely and the hydrophilicity will be changed. G and WP5⊃G are both verified to self-assemble into nanospheres. Upon exposure to visible light, WP5⊃G reassemble into nanovesicles due to the change of supra-amphiphilicity, while G alone does not have this transition...
May 22, 2018: Macromolecular Rapid Communications
Saeed Akkad, Christopher J Serpell
As more evidence emerges supporting the possibility that nonsteroidal anti-inflammatory drugs, especially aspirin (acetyl salicylic acid), might have a role in the prevention and management of certain types of cancer, there have been several attempts to fabricate salicylic acid-based polymers that can be employed in the targeted therapy of tumors. The primary disadvantage so far has been in use of nontherapeutic polymeric backbones that constitute the majority of the therapeutic particle's size. The focus of this research is the creation of a biodegradable polymer consisting only of salicylic acid, and its use as the main building block in targeted nanotherapeutics that would consequently provide both high local dose and sustained release of the active moiety...
May 22, 2018: Macromolecular Rapid Communications
Christopher L McGann, Grant C Daniels, Spencer L Giles, Robert B Balow, Jorge L Miranda-Zayas, Jeffrey G Lundin, James H Wynne
The threat of chemical warfare agents (CWA) compels research into novel self-decontaminating materials (SDM) for the continued safety of first-responders, civilians, and active service personnel. The capacity to actively detoxify, as opposed to merely sequester, offending agents under typical environmental conditions defines the added value of SDMs in comparison to traditional adsorptive materials. Porous polymers, synthesized via the high internal phase emulsion (HIPE) templating, provide a facile fabrication method for materials with permeable open cellular structures that may serve in air filtration applications...
May 22, 2018: Macromolecular Rapid Communications
Qin Dai, He Zhao, Zhuangjun Fan, Wentao Zhao, Guangwei Wang, Jimei Zhang, Rong Hou, Penghui Du, Hongbin Cao
Amphiphilic nanoreactors have been recently used to fabricate photoluminescent carbon-rich polymer nanodots (PCPNs). However, the applications of PCPNs have been limited by their requirements for high temperature and toxic organic solvents or catalysts and the difficult control of their luminescent properties. Herein, a novel and facile strategy is reported for the synthesis of controllable PCPNs. This strategy involves the use of in situ vesicular nanoreactors under mild photoirradiation with fatty acid as the precursor...
May 17, 2018: Macromolecular Rapid Communications
Yang Sun, Xiaoshan Fan, Xuehong Lu, Chaobin He
Strength and toughness are the two most important prerequisites for structural applications. Unfortunately, these two properties are often in conflict in materials. Here, an effective and yet practical strategy is proposed to simultaneously strengthen and toughen poly(l-lactide) (PLLA) using a simple rigid-rubber "reinforcing element." This element consists of a rigid graphene oxide (GO) sheet covalently coupled with poly(caprolactone-co-lactide) (PCLLA) rubbery layers, which can be easily synthesized and incorporated into PLLA matrix to develop composites with well-tailored GO/PLLA interfaces...
May 17, 2018: Macromolecular Rapid Communications
Kevin M Burridge, Thaiesha A Wright, Richard C Page, Dominik Konkolewicz
This review article highlights recent developments in the field of photochemistry and photochemical reversible deactivation radical polymerization applied to aqueous polymerizations. Photochemistry is a topic of significant interest in the fields of organic, polymer, and materials chemistry because it allows challenging reactions to be performed under mild conditions. Aqueous polymerization is of significant interest because water is an environmentally benign solvent, and the use of water enables complex polymer self-assembly and bioconjugation processes to occur...
May 17, 2018: Macromolecular Rapid Communications
Si Qin, Shayan Seyedin, Jizhen Zhang, Zhiyu Wang, Fangli Yang, Yuqing Liu, Jun Chen, Joselito M Razal
The development of wearable devices such as smart watches, intelligent garments, and wearable health-monitoring devices calls for suitable energy storage devices which have matching mechanical properties and can provide sufficient power for a reasonable duration. Stretchable fiber-based supercapacitors are emerging as a promising candidates for this purpose because they are lightweight, flexible, have high energy and power density, and the potential for easy integration into traditional textile processes. An important characteristic that is oftentimes ignored is stretchability-fiber supercapacitors should be able to accommodate large elongation during use, endure a range of bending motions, and then revert to its original form without compromising electrical and electrochemical performance...
May 17, 2018: Macromolecular Rapid Communications
Jiajing Zhang, Hao Tang, Yi Shen, Qingsong Yu, Zhihua Gan
Poly(ethylene glycol) (PEG) shell-sheddable micelles are proved to be effective tools for rapid intracellular drug delivery. However, some adverse factors, such as the potential immunogenicity and the accelerated blood clearance, might be accompanied with the traditional PEG sheddable micelles. Here, a poly(N-2-hydroxypropyl methacrylamide) (PHPMA) sheddable block copolymer containing disulfide bonds on the main chain is prepared to form pH- and reduction-dual-responsive micelles. The most optimal synthetic route of the block copolymer is selected from three potential pathways...
May 16, 2018: Macromolecular Rapid Communications
Yaoguang Chen, Yangfan Zhang, Xiu Liu, Xuliang Fan, Bing Bai, Kang Yang, Zhongxin Liang, Zishou Zhang, Kancheng Mai
The main bottlenecks for the widespread application of radical polymers in organic radical batteries are poor cycling stability, due to the dissolution of radical polymers into the electrolyte, and the low efficiency of multi-step synthesis strategies. Herein, a kind of electrolyte-resistant radical polymer bearing multi-pendant groups (poly(ethylene-alt-TEMPO maleate) (PETM)) is designed and synthesized through a one-step esterification reaction to graft 4-hydroxy-2,2,6,6-teramethylpiperidinyl-1-oxy into the commercially available poly(ethylene-alt-maleic anhydride)...
May 16, 2018: Macromolecular Rapid Communications
Alexey V Ermakov, Olga A Inozemtseva, Dmitry A Gorin, Gleb B Sukhorukov, Sergei Belyakov, Maria N Antipina
Layer-by-layer assembled polymeric multilayer capsules (PMC) of micrometer sizes are permeable for molecules below 1 KDa; therefore, the efficacy of such capsules in the delivery of low molecular weight water soluble bioactive compounds and drugs is frequently challenged. Thermally induced contraction of hollow PMC is explored here to enhance their loading efficacy with model compound, fluorescent rhodamine B (RhB). Four bilayered capsules obtained of poly(diallyldimethylammonium chloride)/polystyrene sulfonate ([PDADMAC/PSS]4 ) or poly-l-arginine/dextran sulfate ([PARG/DS]4 ) on sacrificial CaCO3 spherical microparticles are postloaded with RhB at ambient or elevated temperatures...
May 16, 2018: Macromolecular Rapid Communications
Haibo Wu, Yanzi Gou, Jun Wang, Lei Tao
Modification of material surfaces with polymers is an effective method to develop applicable polymer-material composites. Recently, multicomponent reactions (MCRs) have found their roles in advanced polymer chemistry and applied in surface modification. In this mini review, recent results of MCRs for surface modification are summarized, including the utilization of MCRs as coupling tools to link polymers on material surfaces, and polymers containing multicomponent structures for surface modification. The unique properties of these polymer-material composites stemming from MCRs are introduced, and the preliminary applications of these composites are also discussed...
May 16, 2018: Macromolecular Rapid Communications
Biao Zhao, Jiangfeng Lin, Jianping Deng, Dong Liu
Core/shell particles constructed by polymer shell and silica core have constituted a significant category of advanced functional materials. However, constructing microsized optically active helical polymer core/shell particles still remains as a big academic challenge due to the lack of effective and universal preparation methods. In this study, a seed-surface grafting precipitation polymerization (SSGPP) strategy is developed for preparing microsized core/shell particles with SiO2 as core on which helically substituted polyacetylene is covalently bonded as shell...
May 14, 2018: Macromolecular Rapid Communications
Song Zhang, Michael U Ocheje, Shaochuan Luo, Dakota Ehlenberg, Benjamin Appleby, Daniel Weller, Dongshan Zhou, Simon Rondeau-Gagné, Xiaodan Gu
The understanding of the structure-mechanical property relationship for semiconducting polymers is essential for the application of flexible organic electronics. Herein pseudo free-standing tensile testing, a technique that measures the mechanical property of thin films floating on the surface of water, is used to obtain the stress-strain behaviors of two semiconducting polymers, poly(3-hexylthiophene) (P3HT) and poly(2,5-bis(2-decyltetradecyl)-3,6-di(thiophen-2-yl)diketopyrrolo[3,4-c]pyrrole-1,4-dione-alt-thienovinylthiophene (DPP-TVT) donor-acceptor (D-A) polymer...
May 11, 2018: Macromolecular Rapid Communications
Hajime Nakajima, Katja Loos, Shinobu Ishizu, Yoshiharu Kimura
In this study, poly(mandelate-co-glycolate) (PMG), a modified polyglycolide (PGL), is prepared by ring-opening polymerization (ROP) of L-3-phenyl-1,4-dioxane-2,5-dione (PDD); the cyclic dimer of biobased mandelic acid and glycolic acid. The resulting polymer shows an increased glass transition temperature (Tg ) due to the incorporation of phenyl groups in the chain. High molecular weight PMG is obtained by bulk ROP at 150 °C, and it exhibits a glassy amorphous state with enhanced thermal properties such as a Tg being 35 °C higher than conventional PGL...
May 11, 2018: Macromolecular Rapid Communications
Jiahui Wang, Tianzhen Li, Fan Chen, Dan Zhou, Baijia Li, Xiaohu Zhou, Tiansheng Gan, Stephan Handschuh-Wang, Xuechang Zhou
The mechanical properties (e.g., stiffness, stretchability) of prefabricated hydrogels are of pivotal importance for diverse applications in tissue engineering, soft robotics, and medicine. This study reports a feasible method to fabricate ultrasoft and highly stretchable structures from stiff and tough hydrogels of low stretchability and the application of these switchable hydrogels in programmable shape-morphing systems. Stiff and tough hydrogel structures are first fabricated by the mechanical strengthening of Ca2+ -alginate/polyacrylamide tough hydrogels by addition of Fe3+ ions, which introduces Fe3+ ionically cross-linked centers into the Ca2+ divalent cross-linked hydrogel, forming an additional and much less flexible trivalent ionically cross-linked network...
May 11, 2018: Macromolecular Rapid Communications
Long Fei Fan, Min Zhi Rong, Ming Qiu Zhang, Xu Dong Chen
Development of two-way shape memory polymers that operate free of external force remains a great challenge. Here, the design criteria for this type of material are proposed, deriving a novel fabrication strategy accordingly, which employs conventional crosslinked polyurethane (PU) containing crystalline poly(ε-caprolactone) (PCL) as the proof-of-concept material. Having been simply trained by stretching and thermal treatment without additional ingredients and chemicals, the PU is coupled with a two-way shape memory effect...
May 11, 2018: Macromolecular Rapid Communications
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