酚醛树脂球制备工艺研究  

Preparation of Phenolic Resin Spheres

作　　者：张莉[1] 刘斌[1] 马叶[1] 周建斌[1] 

机构地区：[1]南京林业大学化学工程学院,江苏南京210037

出　　处：《林产化学与工业》2013年第6期63-68,共6页Chemistry and Industry of Forest Products

基　　金：林业公益性行业科研专项(201304611);国家重点基础研究发展计划(973)项目(2010CB732205);"十二五"国家科技支撑计划项目(2012BAD30BOO)

摘　　要：以苯酚和甲醛为原料,采用悬浮聚合法合成球径在毫米级别的酚醛树脂球.考察了甲醛与苯酚物质的量比（nF∶nP）、分散剂聚乙烯醇（PVA）用量、固化剂六次甲基四胺（HMTA）用量和搅拌速度4种影响因素对球体球径和球形度的影响.研究结果表明最佳工艺条件为：nF∶ nP=0.9∶1,PVA用量8％,HMTA用量10％,搅拌速度300～360 r/min,此时制得的酚醛树脂球平均球径达1.04 mm,平均球形度为0.97.工业分析表明其不含灰分,元素分析表明含碳74.27％,热重分析表明残炭率达62％.Using phenol and formaldehyde as raw materials,the millimeter-sized phenolic resin spheres were prepared by suspension polymerization.The effects of four influencing factors on the sphere diameter and sphericity were investigated.They were formaldehyde to phenol ratio （nF∶ nP）,the amount of dispersant（PVA）,curing agent（HMTA） and stirring speed.The results showed that the optimum process conditions were as follows：formaldehyde to phenol ratio was 0.9∶ 1,the mass fraction of added PVA was 8 ％,HMTA was 10 ％ and stirring speed was 300-360 r/min.Under this condition,the average sphere diameter of phenolic resin spheres was 1.04 mm and the average sphericity was 0.97.Industrial analysis and elementary analysis showed that phenolic resin spheres were free of ash and contained 74.27 ％ carbon.In addition,the result of thermogravimetric analysis indicated that carbon yield was up to 62 ％.

关 键 词：酚醛树脂球 悬浮聚合 球径分布 平均球径 球形度 

分 类 号：TQ35[化学工程]