摘要
为了提高水性阻燃涂层的耐水性,以环氧树脂(EP)作为包覆材料,分别采用单一组分和混合组分改性两种工艺对阻燃剂〔聚磷酸铵(APP)、三聚氰胺(MEL)和季戊四醇(PER)〕进行包覆改性,制备出了改性阻燃剂及水性阻燃涂层。借助FTIR分析阻燃剂表面基团;采用SEM观察其微观结构;测量阻燃剂的接触角,并对其粒度分布进行统计;借助TG对阻燃剂及水性阻燃涂层进行测试;并参考国标GB/T1733—1993对涂层耐水性进行了测试。结果表明:两种工艺制备的阻燃剂其表面均包覆EP,且EP用量为阻燃剂质量的15%时,疏水效果达到最佳;阻燃剂经改性后其溶解度降低,接触角增大,使水性阻燃涂层耐水性显著提高,且阻燃剂采用混合组分改性效率更高;聚磷酸铵与EP发生交联生成不饱和富碳结构,加固残炭碳骨架的稳定性及增加涂层残余物的质量。
In order to improve the hydrophobicity of waterborne flame retardant coatings,epoxy resin(EP)was used as coating material to encapsulate flame retardants(ammonium polyphosphate,melamine and pentaerythritol)by single component modification and mixed component modification,respectively.The surface groups of the prepared flame retardants were analyzed by FTIR and their microstructure was observed by SEM.The contact angles of flame retardants were measured and the particle size distribution was analyzed.The flame retardants and water-borne flame retardant coatings were tested by TG,respectively.The water resistance of the coatings was tested with reference to GB/T 1733—1993.The results showed that EP was successfully coated on the surface of the flame retardants prepared by the two processes.When EP dosage was 15%(based on the mass of flame retardant),the obtained flame retardant exhibited the best hydrophobicity.The modification of flame retardants decreased their solubility,increased their contact angles and significantly improved the water resistance of the waterborne flame retardant coatings.In addition,the flame retardant prepared by mixing components modification was more efficient.The crosslinking reaction between ammonium polyphosphate and EP resulted in an unsaturated carbon-rich structure,which strengthened the stability of carbon skeleton and increased the mass of coating residues.
作者
谷凤媚
莫秋凤
赵小莲
陈泉志
杨海娟
李伟洲
GU Feng-mei;MO Qiu-feng;ZHAO Xiao-lian;CHEN Quan-zhi;YANG Hai-juan;LI Wei-zhou(School of Resources,Environment and Materials,Guangxi University,Nanning 530004,Guangxi,China;Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials,Guangxi University,Nanning 530004,Guangxi,China)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2019年第5期828-834,849,共8页
Fine Chemicals
基金
国家自然科学基金(51371059)
广西自然科学基金(2016GXNSFDA380022)
广西科技重大专项(AA17204100-2)
广西高等学校高水平创新团队及卓越学者计划(第二批)
南宁市科学研究与技术开发计划项目(20181191-2
20161312)
南宁市科技创新项目(20176255)~~
关键词
聚磷酸铵
三聚氰胺
季戊四醇
环氧树脂
塑料用涂料
功能材料
ammonium polyphosphate
melamine
pentaerythritol
epoxy resin
coatings for plastics
functional materials
