中国塑料 ›› 2021, Vol. 35 ›› Issue (7): 18-24.DOI: 10.19491/j.issn.1001-9278.2021.07.003

• 材料与性能 • 上一篇    下一篇

多壁碳纳米管在聚氨酯基涂覆材料中分散性能的研究

李亚森1(), 尚玉栋1,2(), 贺江平1, 张翔1, 董涧锟1, 宋然1   

  1. 1.西安工程大学纺织科学与工程学院,西安 710048
    2.西北工业大学材料学院,西安 710072
  • 收稿日期:2021-01-27 出版日期:2021-07-26 发布日期:2021-07-21
  • 作者简介:李亚森(1997—),男,在读硕士研究生,从事聚氨酯/碳纳米管复合材料研究,li123sean@126.com
  • 基金资助:
    陕西省自然科学基础研究计划项目(2019JQ-847);陕西省教育厅自然科学研究专项项目(19JK0368)

Study on Dispersion Properties of Multi⁃walled Carbon Nanotubes in Polyurethane⁃Based Coating Materials

LI Yasen1(), SHANG Yudong1,2(), HE Jiangping1, ZHANG Xiang1, DONG Jiankun1, SONG Ran1   

  1. 1.School of Textile Science and Engineering,Xi’an Polytechnic University,Xi’an 710048,China
    2.School of Material Science and Engineering,Northwestern Polytechnical University,Xi’an 710072,China
  • Received:2021-01-27 Online:2021-07-26 Published:2021-07-21
  • Contact: SHANG Yudong E-mail:li123sean@126.com;shangyudong@xpu.edu.cn

摘要:

采用混合酸对多壁碳纳米管(MWCNTs)进行处理,得到具有反应性基团的功能化多壁碳纳米管(O?MWCNTs);以聚乙二醇(PEG1000)和异佛尔酮二异氰酸酯(IPDI)为主要原料反应生成聚氨酯(PU)预聚体,然后通过原位复合法制备了PU/MWCNTs、PU/O?MWCNTs复合乳液;通过透射电子显微镜(TEM)、扫描电子显微镜(SEM)、X射线光电子能谱仪(XPS)及红外光谱仪(FTIR) 等仪器表征分析了MWCNTs和O?MWCNTs的微观结构、表面形貌和分散性能,并通过FTIR对PU、MWCNTs/ PU、PU/O?MWCNTs进行了结构特征分析。结果表明,混合酸处理使MWCNTs侧壁引入了约自身质量10.2 %的含氧官能团,极大地提高了MWCNTs在PU基体中的分散性;O?MWCNTs在PU预聚体形成之后加入时,会与PU链嵌段或者接枝,更利于分散;PU/O?MWCNTs复合乳液外观细腻呈黑灰色,静置36 h后O?MWCNTs仍呈现良好的分散性。

关键词: 碳纳米管, 功能化, 聚氨酯, 涂覆材料, 分散性

Abstract:

Multi?walled carbon nanotubes (MWCNTs) were treated with mixed acid to obtain functionalized MWCNTs (O?MWCNTs) with reactive groups. Polyethylene glycol (PEG1000) and isophorone diisocyanate (IPDI) were used as main raw materials to produce polyurethane (PU) prepolymer, and then the MWCNTs/ PU and PU/O?MWCNTs composite materials were prepared through an in?situ composite method. The microstructure, surface morphology and dispersion performance of MWCNTs and O?MWCNTs were investigated using TEM, SEM, XPS and FTIR. The structure characteristics of PU/MWCNTs and PU/O?MWCNTs composites as well as pure PU were characterized by use of FTIR. The results indicated that the treatment with mixed acid introduced 10.2 % of oxygen?containing functional groups into the sidewalls of MWCNTs. This greatly improves the dispersibility of MWCNTs in the polyurethane matrix. When O?MWCNTs was added with the formation of prepolymers, O?MWCNTs could be grafted into the PU chains. This may facilitate the dispersion more effectively. The PU/O?MWCNTs composite emulsion exhibited a fine and dark aspect, and the O?MWCNTs still presented good dispersibility after standing for 36 h.

Key words: carbon nanotube, functionalization, polyurethane, coating, dispersion

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