Chinese Journal of Applied Chemistry ›› 2018, Vol. 35 ›› Issue (1): 102-108.DOI: 10.11944/j.issn.1000-0518.2018.01.170034

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Synthesis and Thermosensitivity of Poly(N-isopropylacrylamide)/Hydrotalite Hydrogel

DUAN Yuanshoua,JIA Fengxiab,WANG Shuoa,LI Lifanga*()   

  1. aCollege of Chemistry and Material Science,Shandong Agricultural University,Taian,Shangdong 271018,China
    bBuilding Materials Quality Supervision and Inspection Center of Township Enterprises Shandong Province,Taian,Shandong 271000,China
  • Received:2017-02-15 Accepted:2017-05-19 Online:2018-01-03 Published:2018-01-03
  • Contact: LI Lifang
  • Supported by:
    Supported by the Science and Technology Development Plan of Shandong Province(No.2013GZX20109)


To obtain thermosensitive and injectable hydrogels, hydrotalcite(LDHs) and N-isopropylacrylamide(NIPA) were used to synthesize a series of PNIPA/LDHs hydrogels by free radical polymerization. The properties of PNIPA/LDHs hydrogels were characterized by thermal gravimetric analyzer(TGA), differential scanning calorimetry(DSC) and scanning electronic microscopy(SEM). The results show that the synthesized hydrogels have a reversible sol-gel transformation around 33 ℃. LDHs mass ratios have no influence on the temperature and time of gelation. The thermal stability of PNIPA/LDHs is remarkably increased by the addition of LDHs. The endothermic peak of PNIPA/LDHs hydrogels increases with the increase of LDHs mass ratios and the molar ratio of Mg to Al. PNIPA/LDHs hydrogels have porous structures.

Key words: poly-N-isopropylacrylamide, layered double hydroxides, hydrogel, thermosensitivity