| |
[Macromol. Rapid Commun.] pH- and Sugar-Induced Shape Memory Hydrogel Based on Reversible Phenylboronic Acid-Diol Ester Bonds
A simple strategy is provided to construct a novel pH and sugar-induced
shape memory hydrogel based on the dynamic phenylboronicacid-diolinteractions formed
byphenylboronic acid modified sodium alginate (Alg-PBA) and poly(vinyl
alcohol)(PVA). The dynamic PBA-diol ester bonds would serve as temporary
crosslinks and stabilize the deformed shape of the hydrogel.The disassociation
of the PBA-diol este...
http://www.polymer.cnt//ss/chentaogroup/publicationsshow_7909.html |
| |
Langmuir--Temperature-Driven Switching of the Catalytic Activity of Artificial Glutathione Peroxidase by the Shape Transition between the Nanotubes and Vesicle-like Structures
Smart supramolecular nanoenzymes with temperature-driven switching property have been successfully constructed by the self-assembly of supra-amphiphiles formed by the cyclodextrin-based host–guest chemistry. The self-assembled nanostructures were catalyst-functionalized and thermosensitively-functionalized through conveniently linking the catalytic center of glutathione peroxidase and thermosen...
http://www.polymer.cnt//ss/dongzy/publicationsshow_7694.html |
| |
Trail of pore shape and temperature-sensitivity of poly(N-isopropylacrylamide) hydrogels before and after removing Brij-58 template and pore formation mechanism
To investigate the change upon structure and temperature-sensitivity of
porous hydrogel before and after removing template and confirm the pore
formation mechanism, a series of hydrogels (abbreviated as CLH) based on N-isopropylacrylamide (NIPAM) serving as
functional monomer and polyoxyethylene-20-cetyl-ether (Brij-58) acting as template
were obtained. The chemical composition, crystal structure ...
http://www.polymer.cnt//ss/tjzqs/publicationsshow_7531.html |
| |
[ChemCommun]Self-healable macro-/microscopic shape memory hydrogels based on supramolecular interaction
A simple strategyis provided to construct novel supramolecular hydrogels with both self-healing and shape memory properties.Starting from achieving self-healable hydrogel based on dynamicinteraction ofphenylboronic acid modified sodium alginate (Alg-PBA) and poly (vinyl alcohol) (PVA), further complex of alginate with Ca2+ render this hydrogel with the capability of shape memory inmacro-/microscop...
http://www.polymer.cnt//ss/chentaogroup/publicationsshow_7455.html |
| |
Synthesis and drug release of star shape poly(benzyl L-aspartate)-b-poly(ethylene glycol) copolymers with POSS cores
Star shape amphiphilic block copolymers with polyhedral oligomeric silsesquioxanes as cores were synthesized using the “arm-first” strategy. Firstly, the block copolymer poly(benzyl L-aspartate)-b-poly(ethylene glycol) (PBLA-b-PEG) was synthesized via ring-opening polymerization of β-benzyl L-aspartate-N-carboxyanhydride (BLA-NCA) with α-Methoxy-ω-aminopoly(ethylene glycol) (mPEG-NH2) as a ma...
http://www.polymer.cnt//ss/hebin/publicationsshow_7266.html |
| |
Novel pH-Sensitive Micelles Generated by Star-Shape Copolymers Containing Zwitterionic Sulfobetaine for Efficient Cellular Internalization
pH-sensitive micelles are considered promising carriers for tumor targeted drug delivery. In this study, novel pH-sensitive star-shape copolymers of amphiphilic poly(ε-caprolactone)-b-poly(N,N-diethylaminoethyl methacrylate)-r-poly(N-(3-sulfopropyl)-N-methacryloxyethy-N,N-diethylammoniumbetaine) (4sPCLDEAS) are designed and synthesized with the combination of ring opening polymerization (ROP) and...
http://www.polymer.cnt//ss/hebin/publicationsshow_7264.html |
| |
Instability/collapse of polymeric materials and their structures in stimulus-induced shape/surface morphology switching
With the current development in 3-D printing and origami-inspired technologies, stimulus-induced shape/surface morphology switching becomes a novel approach to produce complex 2-D/3-D mechanisms/structures. This paper briefly discusses major instability/collapse phenomena in the shape change/memory effect based such switching in polymeric materials and their structures, from the beginning of fab...
http://www.polymer.cnt//ss/fujun/publicationsshow_7061.html |
| |
Shape-memory and biocompatibility properties of segmented polyurethanes based on poly( L -lactide) . Frontiers of Chemistry in China, 2007, 2(4): Front. Chem. China 2007, 2(4): 331–336
A series of segmented poly(L-lactide)-polyurethanes (PLA-PUs) were synthesized by a twostep method, with oligo-poly(L-lactide) (PLA) as the soft segments and the reaction product of 2,4-toluene diisocyanate (TDI) and ethylene glycol (EG) as the hard segments. The shape-memory properties and biocompatibility of PLA-PUs
were examined. The 50% compressed PLA-PUs could recover almost 100% to their ori...
http://www.polymer.cnt//ss/pbzhang/publicationsshow_7015.html |
| |
198. Graphene oxide and shape-controlled silver nanoparticle hybrids for ultrasensitive single-particle surface-enhanced Raman scattering (SERS) sensing.
Graphene oxide (GO) is an emerging material for surface-enhanced Raman scattering (SERS) due to its strong chemical enhancement. Studying the SERS performance of plasmonic nanoparticle/GO hybrid materials at the single particle level is crucial for direct probing of the chemical effect of GO on plasmonic nanoparticles. In this work, we integrate GO and shape-controlled Ag nanopartic...
http://www.polymer.cnt//ss/liutianxi/publicationsshow_6941.html |
| |
Investigation on the role of the molecular weight of polyvinyl pyrrolidone in the shape control of high-yield silver nanospheres and nanowires
Serving as shape control agent, polyvinyl pyrrolidone (PVP) has been widely used in chemical synthesis of metal nanoparticles. However, the role of molecular weight (MW) of PVP has been rarely concerned. In this study, we show a facile method to control the shapes of silver nanocrystals using PVP with different MWs. PVPMW=8,000, PVPMW=29,000, PVPMW=40,000, and PVPMW=1,300,000 are compared in ...
http://www.polymer.cnt//ss/wangml/publicationsshow_6477.html |
| |