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| Study on the Filtration Stability of Surface-modified Glass Fiber Filter Paper in High-temperature Hydraulic Systems |
| Received:February 09, 2026 Revised:March 19, 2026 |
| DOI：10.11980/j.issn.0254-508X.2026.06.008 |
| Key Words:glass fibers filter paper silane coupling agent surface modification filter stability |
| Fund Project:中央高校基本科研业务费专项资金（x2zzD2250030）。 |
| Author Name | Affiliation | Postcode | | SHEN Zheyu* | School of Light Industry and Engineering, South China University of Technology, Guangzhou, Guangdong Province,510640 | 510640 | | TANG Min* | School of Light Industry and Engineering, South China University of Technology, Guangzhou, Guangdong Province,510640 | 510640 | | LIANG Yun | School of Light Industry and Engineering, South China University of Technology, Guangzhou, Guangdong Province,510640 | 510640 | | XU Guilong | School of Light Industry and Engineering, South China University of Technology, Guangzhou, Guangdong Province,510640 | 510640 | | SONG Qiang | School of Light Industry and Engineering, South China University of Technology, Guangzhou, Guangdong Province,510640 | 510640 |
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| Abstract:In this study, glass fibers were surface-modified with γ-aminopropyltriethoxysilane (KH550) and γ-glycidoxypropyltrimethoxysilane (KH560), and acrylic resin-reinforced glass fiber filter papers were prepared. The basic properties, pore structure, and filtration performance of different filter papers before and after high-temperature aging were comparatively analyzed to investigate the effect of silane coupling agent modification on the filtration stability of the filter papers. The results showed that after high-temperature aging, the overall fiber network structures of the three filter papers remained intact, with only slight changes in thickness and air permeability. Compared with the blank sample and the KH550-modified filter paper, the KH560-modified filter paper exhibited the highest tensile strength after high-temperature aging (1.49 kN/m), as well as smaller mean and maximum pore sizes. In terms of filtration performance, the average filtration ratio retention of the KH560-modified filter paper after high-temperature aging exceeded 89%, which was higher than that of the blank sample (over 74%). Moreover, it showed the lowest attenuation of filtration ratio with increasing pressure differential. Meanwhile, the KH560-modified filter paper took a longer time to reach the same terminal differential pressure， indicating a longer service life. |
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