title: Alkynyl-functionalization of hydroxypropyl cellulose and thermoresponsive hydrogel thereof prepared with P(NIPAAm-co-HEMAPCL).
abstract: A ternary system thermoresponsive hydrogel, poly(N-isopropylacrylamide-co-hydroxyethyl methylacrylate polycaprolactone)/hydroxypropyl cellulose (or P(NIPAAm-co-HEMAPCL)/HPC), was prepared via "alkynyl/azide" click chemistry between the azide modified graft copolymer P(NIPAAm-co-HEMAPCL-N3) and the alkynyl modified HPC (or alkynyl-HPC). The structures of P(NIPAAm-co-HEMAPCL-N3) and alkynyl-HPC were characterized by (1)H NMR, SEC and FT-IR, and the results demonstrated that the mole ratio of the alkynyl and azide functional groups, and the feed ratios of HPC, PCL, and PNIPAAm could be easily adjusted. The incorporation of PCL and HPC dramatically enhanced the compression modulus of the P(NIPAAm-co-HEMAPCL)/HPC hydrogel, which ranged from 500 to 1000 g/cm(2). Due to the immiscibility of HPC and PCL, a heterogeneous and semicontinuous structure was observed via SEM. The incorporation of HPC accelerated the water absorption rate and enhanced the hydrogel's ability to shed water. The swelling-deswelling and compressive properties could also be adjusted by changing the feeding ratio. The hydrogel exhibited reversible swelling-deswelling behavior after three "swelling-deswelling" cycles.
authors.affiliation: Foshan University, Foshan 528000, PR China; Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650, PR China; Key Laboratory of Cellulose and Lignocellulosics Chemistry, Chinese Academy of Sciences, 510650, PR China; Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics, 510650, PR China.
authors.forename: Lei
authors.initials: L
authors.lastname: Miao
authors.affiliation: Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650, PR China; Key Laboratory of Cellulose and Lignocellulosics Chemistry, Chinese Academy of Sciences, 510650, PR China; Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics, 510650, PR China. Electronic address: hjw@gic.ac.cn.
authors.forename: Jiwen
authors.initials: J
authors.lastname: Hu
authors.affiliation: Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650, PR China; Key Laboratory of Cellulose and Lignocellulosics Chemistry, Chinese Academy of Sciences, 510650, PR China; Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics, 510650, PR China.
authors.forename: Mangeng
authors.initials: M
authors.lastname: Lu
authors.affiliation: Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650, PR China; Key Laboratory of Cellulose and Lignocellulosics Chemistry, Chinese Academy of Sciences, 510650, PR China; Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics, 510650, PR China.
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Tu
authors.affiliation: Foshan University, Foshan 528000, PR China.
authors.forename: Xin
authors.initials: X
authors.lastname: Chen
authors.affiliation: Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650, PR China; Key Laboratory of Cellulose and Lignocellulosics Chemistry, Chinese Academy of Sciences, 510650, PR China; Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics, 510650, PR China.
authors.forename: Yinwen
authors.initials: Y
authors.lastname: Li
authors.affiliation: Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650, PR China; Key Laboratory of Cellulose and Lignocellulosics Chemistry, Chinese Academy of Sciences, 510650, PR China; Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics, 510650, PR China.
authors.forename: Shudong
authors.initials: S
authors.lastname: Lin
authors.affiliation: Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650, PR China; Key Laboratory of Cellulose and Lignocellulosics Chemistry, Chinese Academy of Sciences, 510650, PR China; Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics, 510650, PR China.
authors.forename: Fei
authors.initials: F
authors.lastname: Li
authors.affiliation: Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650, PR China; Key Laboratory of Cellulose and Lignocellulosics Chemistry, Chinese Academy of Sciences, 510650, PR China; Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics, 510650, PR China.
authors.forename: Shengyu
authors.initials: S
authors.lastname: Hu
mesh_terms: D000180:Acrylic Resins / Q000138:chemical synthesis / Q000737:chemistry*; D002482:Cellulose / Q000031:analogs & derivatives*; D020100:Hydrogels / Q000138:chemical synthesis* / Q000737:chemistry; D057927:Hydrophobic and Hydrophilic Interactions; D013696:Temperature
chemical_list: D000180:Acrylic Resins; D020100:Hydrogels; C000611754:poly(N-isopropylacrylamide-co-hydroxyethyl methylacrylate polycaprolactone); D002482:Cellulose
keywords: Hydrogels; Hydroxypropyl cellulose; Poly(N-isopropylacrylamide); Polycaprolactone; Thermoresponsive