Cover Picture: Macromol. Rapid Commun. 21/2004

Abstract

Cover: A transmission electron microscope image of microgel particles that consist of welldefined temperature-sensitive poly(N-isopropylacrylamide) cores with pH-sensitive chitosan shells is shown. The microgels are obtained directly from aqueous graft copolymerization of N-isopropylacrylamide and N,N-methylenebisacrylamide from chitosan. The unique coreshell nanostructure exhibits tuneable responses to pH and temperature.Further details can be found in the Communication

Chitosan derivatives obtained by chemical modifications for biomedical and environmental applications

“…Various types of core-shell microgels have been prepared from the PNIPAAm-grafted polysaccharides. Leung et al [99,100] developed smart microgels that consist of well-defined temperature-sensitive cores with pH-sensitive shells based on PNIPAAm and chitosan. The properties of crosslinked poly(chitosanco-NIPAAm)/poly[methacrylic acid (MAA)-co-methyl methacrylic acid (MMA)] core-shell type copolymer particles were examined [101].…”

Composite structure of temperature sensitive chitosan microgel and anomalous behavior in alcohol solutions

“…Moreover, the appearance indicates an obvious core-shell nanostructure. This is similar to the reported literature [24]. The polymerization was performed at 70 • C, higher than the LCST of PNIPAM (32 • C).…”

“…Wang et al [21,22] reported the preparation and characterization of PNIPAM/CS hydrogels with semiinterpenetrating and full-interpenetrating polymeric networks. Verestiuc and coworkers [23] described the synthesis of semiinterpenetrating hydrogel by using tetraethyleneglycoldiacrylate as the crosslinker and investigated the controlled release ve- [24] prepared PNIPAM/CS core-shell microgel via a new method, both thermo-sensitivity and pH-sensitivity were characterized. Lin et al [25] reported the synthesis of a multiresponsive coreshell copolymer latex with the crosslinked copolymer of NI-PAM and CS as the core and the copolymer of methacrylic acid and methyl methacrylate as the shell.…”

Stimuli‐Responsive Hydrogels Based on Polysaccharides Incorporated with Thermo‐Responsive Polymers as Novel Biomaterials

“…Various types of core-shell microgels have been prepared from the PNIPAAm grafted polysaccharides. Leung et al [108,109] developed smart microgels that consist of well-defined temperature-sensitive cores with pH-sensitive shells based on PNIPAAm and chitosan. The unique core-shell nanostructures, which had narrow size distributions, exhibited tunable responses to pH and temperature.…”