Abstract
The discovery of phenomena of volume phase transition has had a great impact not only on bulk gels but also on the world of microgels. In particular, research on poly(N-isopropylacrylamide) (PNIPAM) microgels, whose transition temperature is close to body temperature, has made remarkable progress in almost 35 years. This review presents some breakthrough findings in microgels that exhibit volume phase transitions and outlines recent works on the synthesis, structural analysis, and research direction of microgels.
Highlights
This article reviews the development of research on microgels exhibiting volume phase transition (VPT) which was discovered by T
There are various microgels exhibiting VPT, but this review focuses on poly(acrylamide derivatives), especially PNIPAM
That was lower than those of both corresponding homopolymer microgels. This phenomenon was attributed to the strong hydrogen bonding between the DEAAM and NIPAM. Another exceptional behavior was observed in PNIPMAM (VPTT: 45 ◦ C)–core and poly(N-npropylacrylamide) (PNnPAM) (VPTT; 23 ◦ C)–shell microgels [28]
Summary
This article reviews the development of research on microgels exhibiting volume phase transition (VPT) which was discovered by T. The preparation of the microgels, physicochemical characteristics of the microgels/dispersions, and future prospect of the microgels are discussed. There are various microgels exhibiting VPT, but this review focuses on poly(acrylamide derivatives), especially PNIPAM. The contents of this review are as follows: Section 1 is an introduction and presents the definition of some terms related with thermosensitive microgels. References [1,2,3] are representative reviews on this subject [2,3,4]
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