Journal ArticleDOI
Recent advances and challenges in designing stimuli-responsive polymers
Fang Liu,Marek W. Urban +1 more
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TLDR
In this article, a review examines physico-chemical requirements necessary to achieve stimuli-responsiveness in heterogeneous polymer networks as well as discusses recent developments and future trends while individual structural components of polymeric networks are responsible for localized chainresponsiveness, desirable spatial and energetic network properties are necessary for collective and orchestrated responsiveness to external or internal stimuli.About:
This article is published in Progress in Polymer Science.The article was published on 2010-01-01. It has received 866 citations till now.read more
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Exploring the structural transition mechanisms of a pair of poly(N-isopropylacrylamide) chains in aqueous solution through coarse-grained molecular simulations coupled with metadynamics
Abstract: Thermo-responsive polymers can experience the coil-to-globule transition with the temperature increases through the lower critical solution temperature (LCST). In this work, the coarse-grained molecular dynamics and Metadynamics (MetaD) are employed to investigate the dynamics and thermodynamics of structural change of a pair of poly(N-isopropylacrylamide) (PNIPAM) chains in aqueous solution. The results reveal that the PNIPAM molecules can move freely in aqueous solution below LCST, resulting in many extended conformations moving among several free energy basins on the free energy surface (FES); and these structures are dominated by the interaction force between PNIPAM and the water molecules. However, the PNIPAM molecules aggregate above LCST with collapsed conformations, leading to a deep basin on the FES; and these structures are dominated by the force between neighbouring PNIPAM chains. Each of the dominant mechanisms, namely, PNIPAM-water interaction force and intermolecular interaction force between PNIPAM chains, has an extreme tendency and corresponds to the extended and collapsed structures, respectively. However, the compromise in competition between these two mechanisms inevitably results in different characteristic structures including the extended and collapsed ones. In addition, the evolution of the trajectories at different temperatures are also analysed to examine the pathway of structural change.
Tunable nanocomposite membranes for water remediation and separations
TL;DR: In this paper, the authors describe different techniques used to create nanocomposites based on poly(vinylidene fluoride) (PVDF) hollow fiber and flat sheet membranes, both thick sponge-like and thin.
Proceedings ArticleDOI
New side-chain azo-polymers for optical applications: synthesis and characterization
Mitica Cezar Spiridon,Florica Adriana Jerca,Valentin Victor Jerca,Dumitru Mircea Vuluga,Dan Sorin Vasilescu +4 more
TL;DR: In this article, a series of side-chain polymers bearing a push-pull azo-moiety, from pseudo-stylbene type molecules, were reported.
Journal ArticleDOI
Rhodamine-Installed Polynorbornenes: Molecular Design, Structure, and Stimuli-Responsive Properties.
TL;DR: In this paper, the synthesis of a number of tailored architectures of rhodamine dye-norbornene conjugate monomers and corresponding homopolymers derived from them is described.
Journal ArticleDOI
Nature's strategy to construct tough responsive hydrogel actuators and their applications
TL;DR: In this paper , the principles of enabling stimulus-responsive behavior in polymer materials are first reviewed for the example of biological materials and subsequently recent progress in implementing stimuli-response behavior in bio-inspired hydrogel actuators are being discussed.
References
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How useful is SBF in predicting in vivo bone bioactivity
Tadashi Kokubo,Hiroaki Takadama +1 more
TL;DR: Examination of apatite formation on a material in SBF is useful for predicting the in vivo bone bioactivity of a material, and the number of animals used in and the duration of animal experiments can be reduced remarkably by using this method.
Journal ArticleDOI
Conjugated polymer-based chemical sensors.
TL;DR: When considering new sensory technologies one should look to nature for guidance, as living organisms have developed the ultimate chemical sensors.
Book
Investigations on the theory of the Brownian movement
TL;DR: Alfaro et al. as discussed by the authors conservado en la Biblioteca del Campus de Mostoles de la Universidad Rey Juan Carlos (sign. 530.12 EIN INV).
Journal ArticleDOI
Photomechanics: directed bending of a polymer film by light.
TL;DR: It is shown that a single film of a liquid-crystal network containing an azobenzene chromophore can be repeatedly and precisely bent along any chosen direction by using linearly polarized light.