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改性纳米晶纤维素增强水性环氧涂料性能研究

Research on the Performance of Modified Nanocrystalline Cellulose Reinforced Waterborne Epoxy Coatings.

作者信息

Kang Lei, Zeng Qiao, Fan Jiang, Dang Xinzhe, Yan Bo, Wang Yongwei, Guo Xingpeng

机构信息

School of Surveying & Testing, Shaanxi Railway Institute, Weinan, Shaanxi 714000, China.

School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China.

出版信息

ACS Omega. 2025 Jun 3;10(23):24367-24381. doi: 10.1021/acsomega.5c00478. eCollection 2025 Jun 17.

DOI:10.1021/acsomega.5c00478
PMID:40547683
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12177591/
Abstract

This study addresses the critical challenges of long-term protection and mechanical stability in waterborne epoxy resin (WEP) coatings by developing composite systems reinforced with modified nanocrystalline cellulose (NCC). Through surface functionalization of NCC using hexadecyltrimethoxysilane (HDTMS) and -[3-(trimethoxysilyl)-propyl]-ethylenediamine (TMPEDA), we synthesized Si-NCC/WEP coatings with enhanced interfacial compatibility and tailored physicochemical properties. Comprehensive characterization via FTIR, AFM, and EIS revealed that the 1% Si-NCC/WEP coating exhibited optimal performance, achieving a 251% increase in Young's modulus (6.95 GPa vs 2.77 GPa for pure WEP) and superior corrosion resistance, as evidenced by a two-order-of-magnitude higher impedance modulus (1.55 × 10 Ω·cm) in neutral 3.5% NaCl solution compared to unmodified WEP. While alkaline and neutral environments demonstrated remarkable barrier stability (retaining 1.80 × 10 Ω·cm after 30 day immersion), acidic conditions (pH = 1) revealed limitations due to NCC's hydrolytic instability. This work establishes a green nanocomposite design paradigm for durable protective coatings, offering actionable insights for industrial corrosion mitigation strategies.

摘要

本研究通过开发用改性纳米晶纤维素(NCC)增强的复合体系,解决了水性环氧树脂(WEP)涂料长期保护和机械稳定性方面的关键挑战。通过使用十六烷基三甲氧基硅烷(HDTMS)和-[3-(三甲氧基甲硅烷基)丙基]乙二胺(TMPEDA)对NCC进行表面功能化,我们合成了具有增强界面相容性和定制物理化学性质的Si-NCC/WEP涂料。通过傅里叶变换红外光谱(FTIR)、原子力显微镜(AFM)和电化学阻抗谱(EIS)进行的综合表征表明,1%的Si-NCC/WEP涂料表现出最佳性能,杨氏模量提高了251%(纯WEP为2.77 GPa,Si-NCC/WEP为6.95 GPa),并且具有优异的耐腐蚀性,在中性3.5% NaCl溶液中的阻抗模量比未改性的WEP高出两个数量级(1.55×10 Ω·cm)。虽然碱性和中性环境表现出显著的阻隔稳定性(浸泡30天后保持在1.80×10 Ω·cm),但酸性条件(pH = 1)由于NCC的水解不稳定性而显示出局限性。这项工作建立了一种用于耐用防护涂层的绿色纳米复合材料设计范例,为工业腐蚀缓解策略提供了可行的见解。

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