中国塑料 ›› 2022, Vol. 36 ›› Issue (6): 46-53.DOI: 10.19491/j.issn.1001-9278.2022.06.008

• 材料与性能 • 上一篇    下一篇

基于二硫键的自修复水性聚氨酯的制备与性能研究

陈亮1, 张萍波1(), 蒋平平1, 包燕敏2, 高学文2, 夏嘉良2   

  1. 1.合成与生物胶体教育部重点实验室,江南大学化学与材料工程学院,江苏 无锡 214122
    2.江苏彩华包装集团公司,江苏 昆山 215321
  • 收稿日期:2022-01-14 出版日期:2022-06-26 发布日期:2022-06-27
  • 通讯作者: 张萍波(1981-),女,副教授,从事绿色合成与催化转化的研究工作,pingbozhang@126.com
    E-mail:pingbozhang@126.com

Preparation and properties of self⁃healing waterborne polyurethane based on disulfide bonds

CHEN Liang1, ZHANG Pingbo1(), JIANG Pingping1, BAO Yanmin2, GAO Xuewen2, XIA Jialiang2   

  1. 1.Key Laboratory of Synthetic and Biological Colloids,Ministry of Education,School of Chemical and Material Engineering,Jiangnan University,Wuxi 214122,China
    2.Jiangsu Caihua Packaging Group Company,Kunshan 215321,China
  • Received:2022-01-14 Online:2022-06-26 Published:2022-06-27
  • Contact: ZHANG Pingbo E-mail:pingbozhang@126.com

摘要:

以芳香二硫化合物2,2'?二氨基二苯二硫醚(AD)为原料,制备了一种自愈性水性聚氨酯(WPU)材料。利用全反射傅里叶变换红外光谱仪、拉曼光谱仪、热失重分析仪、粒径分析仪、热台偏光显微镜和接触角仪对改性材料进行了结构表征与性能测试,探讨了聚氨酯材料的热稳定性、表面疏水性、自修复性能的变化。另外,通过拉伸测试,定量评价了材料的拉伸性能和自愈合效率。结果表明,AD成功引入到WPU分子链中;随着AD含量的增加,改性材料的热稳定性逐渐下降;表面疏水性提升,样品WPU?3的静态接触角达到了81.2 °;拉伸强度由WPU?0的1.1 MPa增至WPU?3的5.6 MPa;同时,在中等愈合温度(80 ℃)下,样品WPU?1加热3 h后可以使拉伸应变的愈合效率达到81 %左右。

关键词: 自修复, 水性聚氨酯, 动态二硫键, 修复效率

Abstract:

A series of self?healing waterborne polyurethane materials (WPUs) was prepared using a aromatic disulfide compound, 2,2'?diaminodiphenyldisulfide (AD), as a raw material. The resulting WPUs were characterized using FTIR spectrometer, Raman spectrometer, thermogravimetric analyzer, particle size analyzer, hot?stage polarized light microscope, and contact angle meter. Their thermal stability, surface hydrophobicity and self?healing properties were investigated together with its tensile properties and self?healing efficiency evaluated quantitatively though a tensile experiment. The results showed that AD was successfully introduced into the molecular chain of WPUs. The thermal stability of WPUs decreased gradually with an increase in AD content, and its surface hydrophobicity increased as well. The sample WPU?3 presented a static contact angle of 81.2 ° and tensile strength of 5.6 MPa. However, WPU?0 only has tensile strength of 1.1 MPa. On the other hand, WPU?1 has a tensile strain healing efficiency of 81 % after heating for 3 h under a moderate healing temperature of 80 ℃.

Key words: self?healing, waterborne polyurethane, dynamic disulfide bond, healing efficiency

中图分类号: