带有疏水-抗紫外线复合涂层的 HTV 硅橡胶的制备与老化研究

IF 3.2 3区化学 Q2 POLYMER SCIENCE

e-Polymers Pub Date : 2024-04-08 DOI:10.1515/epoly-2023-0159

Mingdong Lei, Ziyou Li, Qiang Gan, Weizhen Zhou, Qiang Li

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引用次数: 0

摘要

通过分步喷雾法制备了一系列带有 TiO2 紫外线（UV）屏蔽层和聚四氟乙烯（PTFE）疏水层的高温硫化（HTV）硅橡胶。研究发现，在第一步喷涂过程中，疏水性聚四氟乙烯液体乳液（PTFEL）与永久室温硫化（PRTV）硅橡胶预混合后，可通过喷涂方法稳定、紧密地附着在 HTV 硅橡胶表面。在预混合后的第二步喷涂过程中，TiO2 和 PTEF 固体粉末（PTFES）的加入可提高 HTV 硅橡胶的紫外线屏蔽能力，并进一步增加其疏水性。通过加速湿热老化过程和紫外老化过程分析涂层结构和组成对抗老化性能的影响。结果表明，PRTV-PTFEL/TiO2-PTFES 复合涂层的 HTV 硅橡胶具有良好的紫外线屏蔽能力，同时由于低表面能物质的引入和粗微纳米疏水结构的构建，使其具有优异的疏水性。在老化过程中，纯 HTV 硅橡胶出现了微表面开裂、吸水性增加和机械性能下降的现象，而 PRTV-PTFEL/TiO2-PTFES 涂层 HTV 硅橡胶的这些老化现象得到了显著改善。

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Preparation of HTV silicone rubber with hydrophobic–uvioresistant composite coating and the aging research

A series of high temperature vulcanization (HTV) silicone rubbers with TiO2 ultraviolet (UV) shielding layer and polytetrafluoroethylene (PTFE) hydrophobic layer were prepared via stepwise spray method. It was found that the hydrophobic PTFE liquid emulsion (PTFEL) could steadily and tightly adhere to the HTV silicone rubber surface by spray method after pre-mixing with permanent room temperature vulcanized (PRTV) silicone rubber during the first step spray. And the subsequent introduction of TiO2 and PTEF solid powder (PTFES) could improve the UV shielding ability and further increase the hydrophobicity of HTV silicone rubber during the second step spray after pre-blending. The accelerated hygrothermal aging process and UV aging process were used to analyze the effect of coating structure and composition on anti-aging performance. And the results indicated that the HTV silicone rubber with PRTV-PTFEL/TiO2-PTFES composite coating showed a favorable UV shielding ability and also possessed an excellent hydrophobicity due to the introduction of low surface energy matter and the building of coarse micro-nano hydrophobic structure. After the aging process, the cracked micro-surface, increased water absorption and decreased mechanical property were displayed for the neat HTV silicone rubber, and these aging phenomena got dramatically improved for PRTV-PTFEL/TiO2-PTFES coating HTV silicone rubber.

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来源期刊

e-Polymers 化学-高分子科学

CiteScore

5.90

自引率

10.80%

发文量

审稿时长

6.4 months

期刊介绍： e-Polymers is a strictly peer-reviewed scientific journal. The aim of e-Polymers is to publish pure and applied polymer-science-related original research articles, reviews, and feature articles. It includes synthetic methodologies, characterization, and processing techniques for polymer materials. Reports on interdisciplinary polymer science and on applications of polymers in all areas are welcome. The present Editors-in-Chief would like to thank the authors, the reviewers, the editorial staff, the advisory board, and the supporting organization that made e-Polymers a successful and sustainable scientific journal of the polymer community. The Editors of e-Polymers feel very much engaged to provide best publishing services at the highest possible level.