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高等学校化学研究 ›› 2018, Vol. 34 ›› Issue (3): 500-505.doi: 10.1007/s40242-018-7375-z

• Articles • 上一篇    下一篇

Hybrid Hydrogels Toughened by Chemical Covalent Bonding and Physical Electrostatic Interactions

LIU Li1, PAN Ge1, WANG Licheng2, REN Xiuyan1, ZHANG Xinyue1, WU Guangfeng1   

  1. 1. School of Chemical Engineering, Changchun University of Technology, Changchun 130012, P. R. China;
    2. College of Chemistry, Jilin University, Changchun 130012, P. R. China
  • 收稿日期:2017-11-22 修回日期:2018-02-07 出版日期:2018-06-01 发布日期:2018-03-26
  • 通讯作者: WU Guangfeng E-mail:gfwu@ccut.edu.cn
  • 基金资助:
    Supported by the National Natural Science Foundation of China(No.51173020).

Hybrid Hydrogels Toughened by Chemical Covalent Bonding and Physical Electrostatic Interactions

LIU Li1, PAN Ge1, WANG Licheng2, REN Xiuyan1, ZHANG Xinyue1, WU Guangfeng1   

  1. 1. School of Chemical Engineering, Changchun University of Technology, Changchun 130012, P. R. China;
    2. College of Chemistry, Jilin University, Changchun 130012, P. R. China
  • Received:2017-11-22 Revised:2018-02-07 Online:2018-06-01 Published:2018-03-26
  • Contact: 10.1007/s40242-018-7375-z E-mail:gfwu@ccut.edu.cn
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.51173020).

摘要: Polystyrene nanoparticles with negative charges(n-PSs) were synthesized using styrene(St) and sodium styrene sulfonate(NaSS) as initial materials by surfactant-free emulsion polymerization. Subsequently, a hybrid hydrogel was prepared using acrylamide(AAm) and methacryloyloxyethyltrimethyl ammonium chloride(DMC) as co-monomers with N,N'-methylenebisacrylamide(MBA) as a chemical crosslinker and n-PSs as a physical electro-static interaction agent. The resulting hybrid hydrogels exhibited excellent tensile strength and elongation at break. The tensile stress of hybrid hydrogels was seven times greater than that of hydrogels without n-PSs. The elongation at break of hydrogels reached 700%, which was much higher compared to those of the hydrogels without n-PSs. Furthermore, swelling measurements of the hydrogels indicate that there is an overshoot in the swelling process and the extent of overshoot decreases with the increasing n-PSs. Therefore, the work presented here provides a method for improving the mechanical properties of hydrogels via the introduction of polymeric nanoparticles.

关键词: Hydrogel, Electrostatic interaction, Mechanical property, Swelling property

Abstract: Polystyrene nanoparticles with negative charges(n-PSs) were synthesized using styrene(St) and sodium styrene sulfonate(NaSS) as initial materials by surfactant-free emulsion polymerization. Subsequently, a hybrid hydrogel was prepared using acrylamide(AAm) and methacryloyloxyethyltrimethyl ammonium chloride(DMC) as co-monomers with N,N'-methylenebisacrylamide(MBA) as a chemical crosslinker and n-PSs as a physical electro-static interaction agent. The resulting hybrid hydrogels exhibited excellent tensile strength and elongation at break. The tensile stress of hybrid hydrogels was seven times greater than that of hydrogels without n-PSs. The elongation at break of hydrogels reached 700%, which was much higher compared to those of the hydrogels without n-PSs. Furthermore, swelling measurements of the hydrogels indicate that there is an overshoot in the swelling process and the extent of overshoot decreases with the increasing n-PSs. Therefore, the work presented here provides a method for improving the mechanical properties of hydrogels via the introduction of polymeric nanoparticles.

Key words: Hydrogel, Electrostatic interaction, Mechanical property, Swelling property