Polymer Gel Nanoparticle Networks

Hu, Zhangjun; Lu, Xihua; Gao, Jun; Wang, C.

doi:10.1002/1521-4095(200008)12:16<1173::aid-adma1173>3.0.co;2-z

Cited by 109 publications

(79 citation statements)

References 13 publications

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“…Most polymer materials that exhibit structural color are based on the incorporation of periodically packed colloidal particles into the polymer matrix, or the formation of a porous polymer matrix by etching away the precursor colloidal particles [37][38][39][40][41][42][43][44][45]. These photonic crystalline materials are therefore isotropic in structure, they have poor color quality and weak mechanical response, and their color tuning ability covers narrow wavelength band (< 70 nm).…”

Section: Mechano-responsive Color Tunabilitymentioning

confidence: 99%

“…The well ordered anisotropic structures of the biological tissues enable highly elaborate functions of living organisms [11][12][13][14][15]. For example, actins and myosin show a liquid crystalline anisotropic structure in a muscle sarcomere, which contributes the smooth motion of muscle fibers and muscle contraction in a specific direction [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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Multi-functions of hydrogel with bilayer-based lamellar structure

Haque

Gong

2013

Reactive and Functional Polymers

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A novel hybrid hydrogel has been developed by combining bilayer-based lamellar structure of a self-assembled polymer surfactant and polymer network of conventional hydrogel system. A wide range of lamellar structure from micro-domain up to macro-domain (cm-scale) has been successfully generated in the hydrogel. Flat, infinitely large, and perfectly aligned lamellar macro-domain was formed by applying mechanical shear to the gel forming precursor solution containing monomer, cross-linker, and initiator. The obtained hydrogel system contains macroscopic, single-domain, periodical stacking of integrated microscopic lamellar bilayers inside the polymer matrix of the hydrogel. Periodical stacking of the bilayers in the hydrogel selectively diffract visible light to exhibit magnificent structural color. Due to the uniaxial orientation of the bilayer, the hydrogel possesses superb functions that have never been realized before, such as the one-dimensional swelling, anisotropic Young's modulus, anisotropic molecular permeation, and diffusion. Furthermore, the hydrogel exhibits excellent color tuning ability over a wide spectrum range by mechanical stimuli.3

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Section: Mechano-responsive Color Tunabilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multi-functions of hydrogel with bilayer-based lamellar structure

Haque

Gong

2013

Reactive and Functional Polymers

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“…They demonstrated that this kind of composite hydrogel can be used to control the delivery of bovine serum albumin (BSA) in response to changes in temperature. Hu et al [41] have reported the preparation of hydroxypropyl cellulose (HPC) polymer gel nanoparticles networks where HPC gel nanoparticles were cross-linked via covalent bonding, resulting in a faster responsive rate in shrinking. Nowadays, preparation of new macroscopic composite gels from conventional polymers by simple and green chemistry presents a big challenge for their high potential applications.…”

Section: Full Papermentioning

confidence: 99%

Composite Hydrogels: Robust Carriers for Catalytic Nanoparticles

Lü

Spyra

et al. 2007

Macro Chemistry & Physics

124

102

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A new type of composite hydrogel have been synthesized in which “nano‐tree” type polymer brush particles have been chemically entrapped in a poly(vinyl alcohol) (PVA) matrix by means of the disulfone reaction. This reaction leads to a chemical crosslinking of the nano‐tree brush particles within the PVA hydrogel. Obtained composite hydrogels can be successfully used as template for the deposition of Ag nanoparticles. Field‐emission scanning electron microscopy (FESEM) images demonstrate that monodisperse Ag nanoparticles (ca. 35 nm) are embedded into the composite hydrogel: Most of the silver nanoparticles were generated on the surface of the brush particles while a small amount of Ag nanoparticles was found to be entrapped within the PVA polymer network. We demonstrate that the resulting composite hydrogels can be used as a robust carrier for generation and immobilization of catalytically active Ag nanoparticles. The catalytic activity is investigated by monitoring the reduction of 4‐nitrophenol by NaBH4 in the presence of such a kind of composite hydrogel. The hybrid hydrogels can be easily reused many times as a catalyst and the catalytic activity can be retained over several months.

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“…It has previously been reported [40] that the shrinkage rate of a gel is strongly dependent on the size of the gel. Tanaka and Fillmore [40,41] significantly reduce the response time, so many kinds of PNIPAAm microgels or nanogels have been prepared [32]. However, microgels are too small for some applications and also are not easy to handle.…”

Section: Shrinkage Kineticsmentioning

confidence: 99%