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首页> 外文期刊>Materials science & engineering >Swelling, mechanical and friction properties of PVA/PVP hydrogels after swelling in osmotic pressure solution
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Swelling, mechanical and friction properties of PVA/PVP hydrogels after swelling in osmotic pressure solution

机译：PVA / PVP水凝胶在渗透压溶液中溶胀后的溶胀，机械和摩擦性能

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摘要

The potential of polyvinyl alcohol/polyvmylpyrrolidone (PVA/PVP) hydrogels as articular cartilage replacements was in vitro evaluated by using a macromolecule-based solution to mimic the osmotic environment of cartilage tissue. The effects of osmotic pressure solution on the morphology, crystallinity, swelling, mechanical and friction properties of PVA/PVP hydrogels were investigated by swelling them in non-osmotic and osmotic pressure solutions. The results demonstrated that swelling ratio and equilibrium water content were greatly reduced by swelling in osmotic solution, and the swelling process was found to present pseudo-Fickian diffusion character. The crystallization degree of hydrogels after swelling in osmotic solution increased more significantly when it compared with that in non-osmotic solution. After swelling in osmotic solution for 28 days, the compressive tangent modulus and storage modulus of hydrogels were significantly increased, and the low friction coefficient was reduced. However, after swelling in the non-osmotic solution, the compressive tangent modulus and friction coefficient of hydrogels were comparable with those of as-prepared hydrogels. The better material properties of hydrogels in vivo than in vitro evaluation demonstrated their potential application in cartilage replacement.
机译：聚乙烯醇/聚乙烯吡咯烷酮（PVA / PVP）水凝胶作为关节软骨替代物的潜力通过使用基于大分子的溶液模拟软骨组织的渗透环境进行了体外评估。通过在非渗透压和渗透压溶液中溶胀，研究了渗透压溶液对PVA / PVP水凝胶的形态，结晶度，溶胀，机械和摩擦性能的影响。结果表明，通过在渗透溶液中溶胀，溶胀率和平衡水含量大大降低，并且发现该溶胀过程具有拟菲克扩散特性。与非渗透溶液相比，在渗透溶液中溶胀后水凝胶的结晶度增加得更为明显。在渗透溶液中溶胀28天后，水凝胶的压缩切线模量和储能模量显着增加，低摩擦系数降低。然而，在非渗透溶液中溶胀后，水凝胶的压缩切线模量和摩擦系数与制备的水凝胶相当。与体外评估相比，水凝胶在体内的更好的材料性能证明了其在软骨替代中的潜在应用。

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  • 来源
    《Materials science & engineering》 |2016年第8期|172-180|共9页
  • 作者

    Yan Shi; Dangsheng Xiong; Yuntong Liu; Nan Wang; Xiaoduo Zhao;

  • 作者单位

    School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, PR China;

    School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, PR China,Jiangsu Key Laboratory of Advanced Microano Materials and Technology, Nanjing, Jiangsu 210094, PR China;

    School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, PR China;

    School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, PR China;

    School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, PR China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    PVA/PVP hydrogel; Osmotic pressure; Swelling; Mechanical properties; Friction coefficient;

    机译：PVA / PVP水凝胶;渗透压肿胀;机械性能摩擦系数;

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