Page 219 - 《精细化工》2023年第8期

第 40 卷第 8 期 精 细 化 工 Vol.40, No.8
20 23 年 8 月 FINE CHEMICALS Aug. 2023

建筑用化学品
改性纤维素纳米晶/水性聚氨酯防腐涂料的制备

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张兴华 ，梁小红 1,2* ，张 衡 ，何宏伟 ，陈 林 ，余雯雯 1,2
（1. 太原理工大学 材料科学与工程学院，山西 太原 030024； 2. 山西浙大新材料与化工研究院，山西
太原 030032）

摘要：采用 γ-氨基丙基三乙氧基硅烷（APTES）对纤维素纳米晶（CNC）进行表面改性，通过原位聚合法将改
性 CNC 与水性聚氨酯（WPU）交联复合，在交联剂三羟甲基丙烷（TMP）的协同作用下，合成高度交联的改
性 CNC/WPU 复合材料。通过 FTIR、XRD、SEM、拉伸实验、电化学极化曲线和 EIS 表征了复合材料的结构及
性能。结果表明，TMP 含量〔以聚丙二醇（PPG）和异佛尔酮二异氰酸酯（IPDI）总质量为基准，下同〕2.0%
与改性 CNC 含量（以 PPG 和 IPDI 总质量为基准，下同）1.5%共同添加制备的 CNC/WPU 复合材料性能最优，
所得复合涂层表面致密，拉伸强度较空白 WPU 样品得到明显提高；涂层吸水率降至约 6.0%，耐水性能良好；
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腐蚀电流密度降至 9.76×10 A/cm ，阻抗谱容抗弧半径达 3.15×10 Ω·cm ，盐水中浸泡 168 h 涂层表面无明显变
化，是综合性能优良的耐腐蚀涂料。
关键词：水性聚氨酯；改性纤维素纳米晶；原位聚合；防腐涂料；交联；建筑用化学品
中图分类号：TQ630.7 文献标识码：A 文章编号：1003-5214 (2023) 08-1833-08

Preparation of modified cellulose nanocrystalline/waterborne
polyurethane anticorrosive coatings

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ZHANG Xinghua , LIANG Xiaohong 1,2* , ZHANG Heng , HE Hongwei ,
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CHEN Lin , YU Wenwen
（1. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China;
2. Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan 030032, Shanxi, China）
Abstract: Highly cross-linked and modified cellulose nanocrystalline/waterborne polyurethane (CNC/WPU)
composite materials were synthesized from in-situ polymerization of modified CNC, which was prepared
via surface modification of cellulose nanocrystals (CNC) with γ-aminopropyl triethoxysilane (APTES), and
WPU under the synergistic effect of crosslinking agent trimethylolpropane (TMP). The structure and
properties of the composite coatings obtained were characterized and analyzed by FTIR, XRD, SEM,
tensile test, electrochemical polarization curve and EIS. The results showed that the CNC/WPU composite
material with 2.0% TMP content [based on the total mass of polypropylene glycol (PPG) and isophorone
diisocyanate (IPDI), the same below] and 1.5% modified CNC (based on the total mass of PPG and IPDI,
the same below) exhibited the best performance with dense surface and significantly improved tensile
strength when compared with the blank WPU control. Moreover, the water absorption of the coating was
reduced to about 6.0%, indicating good water resistance. The corrosion current density was reduced to
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9.76×10 A/cm , and the arc radius of spectral capacitive impedance reached 3.15×10 Ω·cm . Meanwhile,
there were no obvious changes on the surface when the composite coating soaked in salt water for 168 h.
All these data proved that the anticorrosive coating obtained were of excellent comprehensive properties.
Key words: waterborne polyurethane; modified cellulose nanocrystalline; in-situ polymerization; anticorrosive
coatings; crosslinking; building chemicals

收稿日期：2022-11-04; 定用日期：2023-01-10; DOI: 10.13550/j.jxhg.20221005
基金项目：山西省“1331 工程”；山西浙大新材料与化工研究院技术开发项目（2021SZ-TD001）；湛江市海洋装备和海洋生物产业揭
榜挂帅制人才团队项目（2021E05034）
作者简介：张兴华（1997—），男，硕士生，E-mail: 2685383262@qq.com。联系人：梁小红（1983—），女，讲师，E-mail：
xhliang1983@163.com；何宏伟（1982—），男，副教授，E-mail：hehongwei4103@126.com。