Synthesis and characterization of poly(aspartic acid) composite hydrogels with inorganic MCM-41 cross-linker

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• 作者：Yinhui Li (1)
  Xiaoling Chen (1)
  Yongmei Liu (1)
  Jingqiong Lu (1)
  Yansheng Zhao (1)
  
• 关键词：Poly(aspartic acid) ; MCM ; 41 ; Composite hydrogel ; Synthesis ; Characterization
• 刊名：Iranian Polymer Journal
• 出版年：2014
• 出版时间：December 2014
• 年：2014
• 卷：23
• 期：12
• 页码：907-916
• 全文大小：1,723 KB
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• 作者单位：Yinhui Li (1)
  Xiaoling Chen (1)
  Yongmei Liu (1)
  Jingqiong Lu (1)
  Yansheng Zhao (1)
  
  1. College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan, 030024, People’s Republic of China
  
• ISSN：1735-5265

文摘

A novel KPAsp/MCM-41 composite hydrogel was synthesised in an aqueous system from poly(aspartic acid) grafted with γ-aminpropyltriethoxysilane (KH550) (KPAsp) and the mesoporous molecular sieve MCM-41 (mobile composition of matters); here, inorganic MCM-41 particles were utilised as a direct cross-linker. The effects of different amount, average particle size of MCM-41, various salt solutions on the composite hydrogel swelling ratio were investigated. The composition and structure of the KPAsp/MCM-41 composite hydrogels were determined by Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The results indicated that MCM-41 addition could improve the physicochemical properties of the synthesised composites. At the amount of 10 wt% of MCM-41 (particle size, 462?nm) the swelling ratios of composite hydrogels prepared in distilled water and physiological saline reached 284 and 87?g/g (enhanced by 1.56- and 1.35-fold, respectively, compared with hydrogels without MCM-41). In chloride salt solution of 0.9 wt% concentration, the water absorbency of the hydrogels was increased in the following order Na+?>?Ca2+?>?Fe3+. The recorded FTIR spectra showed that MCM-41 nanoparticles are effectively introduced into the KPAsp network structure and form KPAsp/MCM-41 composite hydrogels. SEM images confirmed that introduction of MCM-41 inorganic particles into the organic network structure can optimise the pore morphology of the composite hydrogels. Thermogravimetric analysis showed that the thermal stability of the KPAsp/MCM-41 composite hydrogels significantly improves at 27?°C, which is an indication of successful introduction of MCM-41 into the hydrogels.