化工进展 ›› 2017, Vol. 36 ›› Issue (04): 1381-1387.DOI: 10.16085/j.issn.1000-6613.2017.04.030

• 材料科学与技术 • 上一篇    下一篇

基于芳香基双硫键的乙酸酯化纳米纤维素/聚(脲-氨酯)自愈合材料

唐丽荣1,2, 王炜彬2, 王清华2, 庄森炀2, 陈翠霞2, 黄彪2   

  1. 1 福建农林大学金山学院, 福建 福州 350002;
    2 福建农林大学材料工程学院, 福建 福州 350002
  • 收稿日期:2016-09-18 修回日期:2016-10-17 出版日期:2017-04-05 发布日期:2017-04-05
  • 通讯作者: 唐丽荣
  • 作者简介:唐丽荣(1984-),女,博士,讲师,主要从事林产化工与植物纤维化学方面的研究。E-mail:tanglr0201@126.com。
  • 基金资助:
    福建省科技厅自然科学基金(2016J01088)、福建农林大学“校杰出青年科研人才”培养专项基金(xjq201422)、江苏省生物质绿色燃料与化学品重点实验室开放基金(JSBGFC14016)、及广西林产化学与工程重点实验室开放课题(GXFC15-04)项目。

Esterified cellulose nanocrystals/poly(urea-urethane) self-healing materials based on aromatic disulfide bonds

TANG Lirong1,2, WANG Weibin2, WANG Qinghua2, ZHUANG Senyang2, CHENG Cuixia2, HUANG Biao2   

  1. 1 Jinshan College, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China;
    2 College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China
  • Received:2016-09-18 Revised:2016-10-17 Online:2017-04-05 Published:2017-04-05

摘要: 基于芳香基双硫键,以聚丙二醇-4000(PPG-4000)和异佛尔酮二异氰酸酯(IPDI)为原料,双(4-氨基苯基)硫醚为交联剂,乙酸酯化纳米纤维素作为增强相,制备得到乙酸酯化纳米纤维素/聚(脲-氨酯)[esterified cellulose nanocrystals/poly(urea-urethane),E-CNCs/Pus]自愈合复合材料。对其力学性能、热学性能、表面化学结构、自愈合性能进行了表征研究。结果表明,E-CNCs/PUs在室温下不需其他额外条件即可实现自愈合,说明芳香基双硫键可作为动态交联键应用于自愈合聚(脲-氨酯)的设计与构建;E-CNCs添加量为0.1%时,其聚(脲-氨酯)复合材料拉伸强度达到5.71MPa,与纯聚(脲-氨酯)材料相比,增加了43.11%;E-CNCs/PUs复合材料不仅具有较高的拉伸强度,而且保持了良好的弹性和延展性;热学性能分析结果表明,E-CNCs对聚(脲-氨酯)复合材料热稳定性具有较小影响。

关键词: 芳香基双硫键, 乙酸酯化纳米纤维素, 聚(脲-氨酯), 自愈合

Abstract: In this study,the esterified cellulose nanocrystals/poly(urea-urethane)(E-CNCs/PUs) self-healing materials were prepared using polypropylene glycol 4000(PPG-4000) and isophorone diisocyanate(IPDI) as raw material,bis (4-aminophenyl) sulfide as crosslinking agent,and esterified cellulose nanocrystals as reinforcement. The mechanical properties,thermal properties,surface chemical structures,and self-healing properties were investigated. The results show that E-CNCs/PUs were self-healing effectively at room temperature without any external interventions,which confirms that bis(4-aminophenyl) disulfide can be effectively used as a dynamic cross-linker for the design of self-healing poly(urea-urethane) material. The maximum tensile strength of E-CNCs/PUs could reach 5.71MPa when the additive amount of E-CNCs was 0.1%,which was increased by 43.11% compared with pure poly(urea-urethane). E-CNCs/PUs composite materials present high tensile strength,elasticity,and malleability. The additive of E-CNCs just has a small influence on the thermal properties of E-CNCs/PUs self-healing materials.

Key words: aromatic disulfide bond, esterified cellulose nanocrystals, poly(urea-urethane), self-healing

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