中国塑料 ›› 2019, Vol. 33 ›› Issue (2): 75-81.DOI: 10.19491/j.issn.1001-9278.2019.02.014

• 加工与应用 • 上一篇    下一篇

纳米纤维素晶须改性羧酸型水性聚氨酯的合成及性能

陆亚东1,张萍波1*,蒋平平1,唐敏艳2,俞晓琴2,包燕敏2,高学文3   

  1. 1. 江南大学化学与材料工程学院
    2. 昆山嘉利普制版胶粘剂油墨有限公司
    3. 嘉合实业(苏州)有限公司
  • 收稿日期:2018-10-08 修回日期:2018-10-27 出版日期:2019-02-26 发布日期:2019-03-26
  • 基金资助:
    江苏省产学研联合创新资金项目(BY2014023-08)

Synthesis and Preparation of Carboxylic-Acid-Type Waterborne Polyurethane Modified with Nano-Cellulose Whiskers

  • Received:2018-10-08 Revised:2018-10-27 Online:2019-02-26 Published:2019-03-26

摘要: 以蓖麻油(CO)、22双(羟甲基)丙酸(DMPA)、异佛尔酮二异氰酸酯聚氨酯(IPDI)为主要原料合成了植物油基水性聚氨酯(WPU),通过酸解法制得的纳米纤维素晶须(CNC)与WPU超声物理共混,利用纳米纤维素晶须与WPU基体之间强烈的氢键作用制得纳米复合材料(WPU/CNC)涂膜。通过红外光谱、粒径分析、扫描电子显微镜、热失重分析、超热扫描量热分析等方法来测试涂膜的性能。研究表明,在CNC的添加量为0.25 %(质量分数,下同)时,可获得分散性良好及性能优异的聚氨酯涂膜,纳米复合材料的拉伸强度从17.56 MPa增强到27.96 MPa;并且涂膜的热稳定性,硬段的分解温度及软段的玻璃化转变温度(Tg)也得到了很好的改善。

Abstract: The vegetable oil-based waterborne polyurethane (WPU) was synthesized by using castor oil, 2-2-bis(hydroxymethyl)propionic acid and isophorone diisocyanate polyurethane as raw materials (IPDI) and then was mixed with nano-cellulose whiskers (CNC) by acid hydrolysis under ultrasonication. The coating films of WPU/CNC composite were prepared through strong hydrogen bonding between the CNC filler and WPU matrix. The microstructure, morphology and properties of the coating films were investigated by Fourier-transform infrared spectroscopy, scanning electron microscopy, particle-size analysis, thermogravimetric analysis, differential scanning calorimetry and mechanical measurements. The results indicated that the coating films achieved good dispersibility and excellent performance when 0.25 wt% of CNC was added. The tensile strength of the composites was improved from 17.56 MPa to 27.96 MPa. Moreover, the thermal stability of coating films, the decomposition temperature of hard segment and the glass transition temperature of soft segment were also improved.