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Conformation and Counterion Distribution of Polyelectrolyte in Solution as Viewed from Dielectric Approach

Chinese Journal of Polymer Science 2024年第9期42卷 1278-1301,I0005页

作者： Kong-Shuang Zhao College of Chemistry Beijing Normal UniversityBeijing 100875China

Polyelectrolyte solutions are more variable than uncharged macromolecule due to electrical interaction between charged molecules and surrounding ***,the subject of polyelectrolyte solutions has attracted a wide range of interests in both basic and applied research,and has also been extensively ***,the understanding of the molecular dynamics and conformation of polyelectrolytes in solution remains to be deepened,and universal consensus on some key issues have not been *** methods have contributed to solving the above problems in different ways,including dielectric relaxation spectroscopy(DRS).In this perspective,we briefly reviewed the history of dielectric spectroscopic research on polyelectrolyte solution,with emphasis on summarizing our *** particular,we expound the characteristics of DRS and its ability to obtain the internal information of the system of ***,we evaluate the advantages and limitations of the dielectric method and discussed future prospects of this field.

关键词： Polyelectrolyte Dielectric relaxation spectroscopy Chain conformation thermosensitive microgel PNIPAM microgel Spherical polyelectrolyte brushes

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Preparation and Chiral Recognition of thermosensitive Poly（N-isopropylacrylamide） microgels Containing Modified L-Phenylalanine Groups

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Chemical Research in Chinese Universities 2015年第4期31卷 664-668页

作者： CHEN Jiaojiao YIN Yue FU Hongjun LI Qifeng ZOU Jiwei State Key Laboratory of Separation Membranes and Membrane Process School of Environmental and Chemical Engineering Tianjin Key Laboratory of Fiber Modification and Functional Fiber and Textile Division Tianjin Polytechnic University Tianjin 300387 P. R. China

thermosensitive poly[N-isopropylacrylamide（NIPAM）-co-N-acryloyl-L-phenylalanine ethyl ester （NALPE）] microgels were prepared by the free radical polymerization of NIPAM and chiral monomer, NALPE. Such microgels exhibited spherical shape and favorable monodispersity. Increasing the content of NALPE units would en- hance the average diameter, but decrease the thermosensitivity and volume-phase transition temperatures of the mi- crogels. Compared with PNIPAM microgels, the microgels containing NALPE units performed chiral recognozable capacities for D-phenylalanine and D-tartaric acid, and the enantioselectivity and adsorption capacity of the microgels improved with increasing the temperature and/or the content of NALPE units.

关键词： thermosensitive microgel N-Isopropylacrylamide L-Phenylalanine Chiral recognition

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