纤维素纳米晶的表面接枝修饰及聚酯复合材料的力学增强效应

陈阳; 林宁

doi:10.11777/j.issn1000-3304.2025.25156

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纤维素纳米晶的表面接枝修饰及聚酯复合材料的力学增强效应

研究论文 | 更新时间：2025-09-25

- 纤维素纳米晶的表面接枝修饰及聚酯复合材料的力学增强效应
- Surface Grafting Modifications of Cellulose Nanocrystals and Mechanical Enhancement for Polyester Composites
- 高分子学报 2025年页码：1-14
- 作者机构：
  
  武汉理工大学化学化工与生命科学学院武汉 430070
- 作者简介：
  
  E-mail: ninglin.whut@gmail.com, ninglin@whut.edu.cn
- 基金信息：
  
  武汉市重点研发计划(2024020702030117)
- DOI：10.11777/j.issn1000-3304.2025.25156
  中图分类号：
- CSTR：32057.14.GFZXB.2025.7455
- 收稿日期：2025-06-27，
  
  录用日期：2025-07-31，
  
  网络出版日期：2025-09-25，
- 稿件说明：
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陈阳, 林宁. 纤维素纳米晶的表面接枝修饰及聚酯复合材料的力学增强效应. 高分子学报, doi: 10.11777/j.issn1000-3304.2025.25156

Chen, Y.; Lin, N. Surface grafting modifications of cellulose nanocrystals and mechanical enhancement for polyester composites. Acta Polymerica Sinica, doi: 10.11777/j.issn1000-3304.2025.25156
陈阳, 林宁. 纤维素纳米晶的表面接枝修饰及聚酯复合材料的力学增强效应. 高分子学报, doi: 10.11777/j.issn1000-3304.2025.25156 DOI： CSTR： 32057.14.GFZXB.2025.7455.

Chen, Y.; Lin, N. Surface grafting modifications of cellulose nanocrystals and mechanical enhancement for polyester composites. Acta Polymerica Sinica, doi: 10.11777/j.issn1000-3304.2025.25156 DOI： CSTR： 32057.14.GFZXB.2025.7455.

摘要

纤维素纳米晶(CNC)以其优异机械性能等优势常用于复合材料的增强填料，而复合材料的力学增强效果常与纳米增强填料的分散性以及界面相容性有着密切的联系. 本研究在CNC表面分别共价接枝蓖麻油和聚乳酸链，增强其与聚酯基质的相容性，制备力学增强复合材料. 通过计算，CNC-

-CO的表面接枝率为205.30 mg/g

CNC

，表面取代度为12.60%；CNC-

-PLA的表面接枝率为431.90 mg/g

CNC

，表面取代度为9.14%. 通过Hansen溶解度参数对复合体系的相容性进行预测，进一步采用显微红外成像对CNC在基质中的分散性进行可视化评估. 结果显示，CNC的表面修饰显著改善了其与基质间的相容性和分散性. 复合材料的热力学性能进一步证明了体系中的界面增容和力学增强效应.

Abstract

Cellulose nanocrystals (CNC) are commonly used as reinforcing fillers for composites due to their excellent mechanical properties and other advantages

and the mechanical enhancement of composites is often closely related to the dispersion of the nanoreinforcing fillers as well as the interfacial compatibility. In this study

castor oil and polylactic acid chains were covalently grafted on the surface of CNC

respectively

to enhance its compatibility with polyester matrix and prepare mechanically enhanced composites. The surface grafting rate of CNC-

-CO was calculated to be 205.30 mg/g

CNC

with a surface substitution of 12.60%

while the surface grafting rate of CNC-

-PLA was 431.90 mg/g

CNC

with a surface substitution of 9.14%. The compatibility of the composite systems was predicted by the Hansen solubility parameters

and the dispersion of CNC in the matrix was further evaluated visually using micro-infrared imaging. The results showed that the surface modification of CNC significantly improved the compatibility and dispersion between it and the matrix. The thermodynamic properties of the composites further demonstrated the interfacial capacitation and mechanical enhancement effects in the systems.

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