Epoxy Modified Polymethylpenylsiloxane Emulsions for Oil Agent in Carbon Fibers Production with Different Epoxy Content to Improve the Thermal Stability and Decrease the Surface Tension

IF 2.8 3区材料科学 Q3 CHEMISTRY, PHYSICAL Silicon Pub Date : 2024-09-26 DOI:10.1007/s12633-024-03159-6

Qiuxue Zhang, Yunjiao Deng, Zhongyu Fu, Shuangquan Wang, Songsong Li, Chao Zhou, Huixuan Zhang

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Abstract

A series of epoxy modified polymethylpenylsiloxane (EPMPS) emulsions for oil agent in carbon fibers production were synthesized with EPMPS resins and non-ionic emulsifier by phase inversion emulsification. The EPMPS resins with different epoxy content were prepared by non-hydrolytic sol–gel method. The influence of epoxy content on the chemical structure, molecular weight, surface tension and thermal stability of EPMPS resins were investigated by Fourier transform infrared (FTIR), gel permeation chromatography (GPC), contact angle meter and thermogravimetric analysis (TGA), respectively. The properties of EPMPS emulsions and their effects on polyacrylonitrile (PAN) precursor were investigated by scanning electron microscopy (SEM) and differential scanning calorimetry (DSC). It was found that the increase of epoxy content not only obviously decreased the molecular weight and surface tension of EPMPS, but also conduced to the processing of PAN precursor. With the decreasing of surface tension, the oil agent was easier to spread and film on the surface of PAN precursors. In addition, the TGA curves showed that the EPMPS resins had good thermal stability at low temperature and can be completed volatilized under high temperature conditions. Hence, the EPMPS emulsions could be used as oil agent for PAN precursors.

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不同环氧含量的环氧改性聚甲基丙烯硅氧烷乳液用于碳纤维生产中的油剂，可提高热稳定性并降低表面张力

采用反相乳化法，用 EPMPS 树脂和非离子乳化剂合成了一系列环氧改性聚甲基硅氧烷（EPMPS）乳液，用于碳纤维生产中的油剂。采用非水解溶胶-凝胶法制备了不同环氧含量的 EPMPS 树脂。傅立叶变换红外光谱（FTIR）、凝胶渗透色谱（GPC）、接触角仪和热重分析（TGA）分别研究了环氧树脂含量对 EPMPS 树脂的化学结构、分子量、表面张力和热稳定性的影响。扫描电子显微镜（SEM）和差示扫描量热仪（DSC）研究了 EPMPS 乳液的性质及其对聚丙烯腈（PAN）前体的影响。结果发现，环氧树脂含量的增加不仅明显降低了 EPMPS 的分子量和表面张力，还促进了 PAN 前体的加工。随着表面张力的降低，油剂更容易在 PAN 前体表面铺展成膜。此外，TGA 曲线显示 EPMPS 树脂在低温下具有良好的热稳定性，在高温条件下可完全挥发。因此，EPMPS 乳液可用作 PAN 前体的油剂。

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来源期刊

Silicon CHEMISTRY, PHYSICAL-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

5.90

自引率

20.60%

发文量

685

审稿时长

>12 weeks

期刊介绍： The journal Silicon is intended to serve all those involved in studying the role of silicon as an enabling element in materials science. There are no restrictions on disciplinary boundaries provided the focus is on silicon-based materials or adds significantly to the understanding of such materials. Accordingly, such contributions are welcome in the areas of inorganic and organic chemistry, physics, biology, engineering, nanoscience, environmental science, electronics and optoelectronics, and modeling and theory. Relevant silicon-based materials include, but are not limited to, semiconductors, polymers, composites, ceramics, glasses, coatings, resins, composites, small molecules, and thin films.