摘要
为了解决酚醛树脂因浸渍石墨后黏度增大而失效的问题,以氯化锌作为催化剂,用糠醇对黏度过大的酚醛树脂进行改性。并分别以失效酚醛树脂、普通酚醛树脂和改性酚醛树脂作为浸渍剂,在0.7MPa、180℃的条件下对普通中密度石墨进行了4次浸渍固化操作,测试了浸渍剂的黏度变化并对浸渍固化后的石墨进行了微观结构、开孔气孔率、增重率、热重、抗压强度以及耐腐蚀性等表征分析。结果表明,当酚醛树脂、糠醇和Zn Cl_2的质量比为100∶40∶2时,改性酚醛树脂的黏度适中,浸渍石墨的耐高温性能最好;并且使用改性酚醛树脂浸渍的石墨具有更好的填孔效率,只需要2次浸渍就能达到最好的浸渍效果,与失效酚醛树脂浸渍的石墨相比增重率提高了2%,抗压强度和耐碱性也有一定提升。
In order to solve the problem that the phenolic resin become invalid due to the viscosity increase after impregnation of graphite, the phenolic resin of high viscosity was modified by furfuryl alcohol with Zn Cl2 as catalyst.By using ineffective,normal and modified phenolic resin respectively as the impregnants,the general medium-density graphite was impregnated and cured for four times under 0.7 MPa and 180℃.The viscosity changes of the impregnants were tested and the microstructures,porosity,weight gain,thermogravimetry,compressive strength and the corrosion resistance of the impregnated and cured graphite were analyzed.The results showed that the viscosity of modified phenolic resin was moderate and the high temperature resistance of the impregnated graphite was best when the mass ratio of phenolic resin,furfuryl alcohol and Zn Cl2 was 100∶40∶2.What＇s more,the graphites impregnated only 2 times by the modified phenolic resin performed the best,and the rate of weight increased by 2% compared with that impregnated by the ineffective phenoli cresin,and the compressive strength and alkali resistance were also improved.
作者
蒋凤易
田蒙奎
郝立通
邵珠花
杨颖
罗祥丽
JIANG Fengyi;TIAN Mengkui;HAO Litong;SHAO Zhuhua;YANG Ying;LUO Xiangli(College of Chemistry and Chemical Engineering,Guizhou University,Guiyang 550025,Guizhou,China;Guizhou Lanxin Graphite Electrical Equipment Manufacturing Co.,Ltd.,Fuquan 550500,Guizhou,China)
出处
《化工进展》
EI
CAS
CSCD
北大核心
2018年第6期2316-2322,共7页
Chemical Industry and Engineering Progress
基金
贵州省石墨装备制造及应用科技创新人才团队项目[黔科合人才团队(2015)4004号]
贵州省优秀青年科技人才计划[黔科合平台人才(2017)5605]
贵阳国家高新区高层次人才创新创业项目
关键词
改性酚醛树脂
失效酚醛树脂
浸渍石墨
modified phenolic resin
ineffective phenolic resin
impregnated graphite
