Self-healing waterborne fluorinated polyurethane-acrylate based on photoreversible reaction and hydrogen bonds

IF 2.9 4区化学 Q2 POLYMER SCIENCE

Polymer International Pub Date : 2024-03-06 DOI:10.1002/pi.6629

Xiuqing Liu, Jianhua Zhou, Hong Li

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Abstract

The development of self-healing materials is an effective strategy to improve the service life of polymer materials. In this study, self-healing waterborne fluorinated polyurethane-acrylate (WFPUA) containing UV-responsive coumarin groups was prepared by Pickering emulsion polymerization using modified cellulose nanocrystal as a stabilizer. The effect of double bond-terminated waterborne polyurethane content on emulsion polymerization and latex film properties was mainly studied. Due to the dynamic reversibility of the coumarin groups and the synergistic effect of hydrogen bonds, the optimized sample (WFPUA-30) had excellent mechanical properties and self-healing properties. The tensile strength was 5.24 MPa and the elongation at break was 267%. The self-healing efficiency of tensile strength and elongation at break after 6 h of repair was 86.52% and 93.20%, respectively. In addition, due to the presence of fluorine-containing groups, the water and oil contact angles of the latex film could reach 101.7° and 82.1°, respectively. This work broadens the way for the manufacture of self-healing and multifunctional waterborne polyurethane-acrylates. © 2024 Society of Industrial Chemistry.

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基于光可逆反应和氢键的自愈合水性含氟聚氨酯丙烯酸酯

开发自愈合材料是提高聚合物材料使用寿命的有效策略。本研究以改性纳米纤维素晶体为稳定剂，通过 Pickering 乳化聚合法制备了含有紫外线响应香豆素基团的自修复水性含氟聚氨酯丙烯酸酯（WFPUA）。主要研究了双键端水性聚氨酯（WPU）含量对乳液聚合和胶乳薄膜性能的影响。由于香豆素基团的动态可逆性和氢键的协同作用，优化样品（WFPUA-30）具有优异的机械性能和自愈性能。拉伸强度为 5.24 兆帕，断裂伸长率为 267%。修复 6 小时后，拉伸强度和断裂伸长率的自修复效率分别为 86.52% 和 93.20%。此外，由于含氟基团的存在，乳胶膜的水接触角和油接触角分别达到了 101.7°和 82.1°。这项研究拓宽了生产自愈合多功能水性聚氨酯丙烯酸酯的途径。

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来源期刊

Polymer International 化学-高分子科学

CiteScore

7.10

自引率

3.10%

发文量

135

审稿时长

4.3 months

期刊介绍： Polymer International (PI) publishes the most significant advances in macromolecular science and technology. PI especially welcomes research papers that address applications that fall within the broad headings Energy and Electronics, Biomedical Studies, and Water, Environment and Sustainability. The Journal’s editors have identified these as the major challenges facing polymer scientists worldwide. The Journal also publishes invited Review, Mini-review and Perspective papers that address these challenges and others that may be of growing or future relevance to polymer scientists and engineers.