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硼改性酚醛树脂在机油滤纸中的应用

2021-09-21李昌胜刘忠惠岚峰杨乾

中国造纸 2021年12期

李昌胜 刘忠 惠岚峰 杨乾

摘要:本研究采用水杨醇法制备硼改性酚醛树脂( BPF ),并将其应用于机油滤纸以增强其物理性能。研究结果表明,最佳的 BPF 合成条件为:苯酚:甲醛:硼酸物质的量比1.0∶1.4∶0.2、反应温度110℃、反应时间1.5 h ,其在800℃的残余质量为68.4%。当固化温度180℃,上胶量(24±1)%时, BPF 浸渍固化滤纸性能最佳,耐破指数达2.67 kPa·m2/g ,抗张指数达50.2 N ·m/g ,滤纸纵向挺度为6.37 mN·m 。180℃老化试验(老化12 h)后滤纸耐破指数为1.38 kPa·m2/g ,抗张指数为44.4 N ·m/g 。且在150℃的机油中老化192 h 后,耐破度为196 kPa ,满足 JB/T 12651.1中对机油滤纸的质量要求。

关键词:硼改性酚醛树脂;机油滤纸;耐老化

中图分类号:TS762.7   文献标识码:A    DOI:10.11980/j. issn.0254-508X.2021.12.002

Application of Boron Modified Phenolic Resin in Oil Filter Paper

LI Changsheng  LIU Zhong*   HUI Lanfeng  YANG Qian      (School ofLight Industry Science and Engineering,Tianjin Key Lab ofPulp and Paper,

Tianjin University of Science & Technology,Tianjin,300457)

(*E-mail :mglz@tust. edu. cn)

Abstract: The boron-modified phenolic resin ( BPF ) was prepared via salicyl alcohol method and applied to oil filter paper to enhance its physical properties in this study. The results showed that the best BPF synthesis conditions were as follows:molar ratio of phenol,formalde? hyde and boric acid was 1.0∶1.4∶0.2,reaction temperature was 110℃,reaction time was 1.5 h,and its residual mass at 800℃ was 68.4%. When the curing temperature was 180℃,and glue content was (24±1)%,the BPF impregnated cured filter paper had the best per? formance. The break resistance index reached 2.67 kPa ·m2/g,tensile index reached 50.2 N·m/g,the longitudinal stiffness of filter paper was 6.37 mN ·m. After aging test at 180℃ for 12 h,the breaking resistance index of filter paper was 1.38 kPa ·m2/g,and the tensile resistance in? dex was 44.4 N·m/g. And the rupture resistance was 196 kPa after aging test in oil at 150℃ for 192 h,which met the quality requirements of JB/T 12651.1.

Key words :boric acid modified phenolic resin;oil filter paper;aging resistance

机油滤纸是汽车工业滤纸中的一种,是汽车机油滤清器的核心组成部分。汽车机油滤清器的主要作用是滤除机油中的粉尘和杂质,防止和减少粉尘和杂质对发动机关键部件的磨损,延长发动机的使用寿命。机油系统经常会在较低温度下启动,导致瞬时压差很高,需要滤纸具有较好的固有强度如耐破度、挺度等,同时机油系统运行温度较高,需要滤纸具有较好的耐温性和抗老化性。但是汽车用机油滤纸一般由植物纤维混合合成纤维或无机纤维抄造而成,抗水性差、质地疏松柔软,其固有强度如耐破度、挺度等较低,不能满足滤芯加工和使用时强度、耐水性、堵塞寿命等性能要求,需对机油滤纸进行树脂浸渍增强处理[1-3]。常规使用的滤纸用Novolak或 Resole 型酚醛树脂浸渍,用甲醇或乙醇作为溶剂溶解树脂[4]。

酚醛树脂是最早实现工业化生产的合成树脂之一,具有优良的耐温性、阻燃性、耐化学试剂性、尺寸稳定性,被广泛应用于汽车工业滤纸性能的增强。……

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