摘要
以异佛尔酮二异氰酸酯(IPDI)、聚丙二醇(PPG)、端羟基丙基硅氧烷(PDMS)、三羟甲基丙烷(TMP)、甲基丙烯酸羟丙酯(HPMA)和二羟甲基丙酸(DMPA)为原料,采用溶液聚合法合成了含不饱和双键的有机硅改性水性聚氨酯(SiPU)水性分散体;以SiPU为种子乳液,加入丙烯酸丁酯(BA)、甲基丙烯酸甲酯(MMA)和甲基丙烯酸十二氟庚酯(DFMA),通过自由基聚合合成交联型氟硅改性聚氨酯-聚丙烯酸酯(FSiPUA)复合乳液.考察了HPMA、PDMS和DFMA用量对乳液聚合及涂膜性能的影响,通过马尔文粒度仪、接触角仪、FT-IR、TG-DSC、XPS和AFM等表征了PUA、SiPUA、FSiPUA的乳液特性及涂膜性能.结果表明:当HPMA、PDMS和DFMA用量分别为5.2%、7.0%和20.0%时,可得到耐水性和疏水性良好的交联型FSiPUA复合乳液;HPMA、PDMS和DFMA的引入使涂膜的表面粗糙度增加,吸水率减小,水接触角增大,疏水性增强,热稳定性和力学性能得到较大提高.
Siliconated polyurethane （SiPU） emulsion containing the unsaturated double bond was prepared via the solution polymerization,with isophorone diisocyanate （IPDI）,polypropylene glycol （PPG）,hydroxypropyl terminated polydimethyl sioxane （PDMS）,trimethylolpropane （TMP）,hydroxypropyl methacrylate （HPMA） and dimethylol propionic acid （DMPA） as main materials.Then,the cross-linking siliconated polyurethane-fluorinated acrylate hybrid emulsion （FSiPUA） was prepared via the radical emulsion polymerization,with SiPU as the seed emulsion and with butyl acrylate （BA）,methyl methacrylate （MMA） and dodecafluoroheptyl methacrylate （DFMA） as the main monomers.Finally,the influences of HPMA,PDMS and DFMA dosages on the emulsion polymerization process and the film properties were discussed,and the PUA emulsion,the SiPUA emulsion and the FSiPUA hybrid emulsion as well as their films were characterized by using a Malvern particle size analyzer and a contact angle meter and by means of FT-IR,TG-DSC,XPS and AFM.The results indicate that,when the HPMA,PDMS and DFMA dosages are respectively 5.2％,7.0％ and 20.0％,the FSiPUA hybrid emulsion possesses good water resistance and high hydrophobicity,and that,owing to the addition of HPMA,PDMS and DFMA,the thermal stability and mechanical properties of the latex film are greatly improved with a higher surface roughness,a bigger water contact angle,a higher hydrophobicity and a lower water absorption.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第10期13-19,共7页
Journal of South China University of Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(20876065
21076092)
关键词
有机硅改性水性聚氨酯
含氟丙烯酸酯
交联型氟硅改性聚氨酯-聚丙烯酸酯
复合乳液
涂膜
疏水性
热稳定性
力学性能
siliconated waterborne polyurethane
fluorinated acrylate
cross-linking siliconated polyurethane-fluorinated acrylate
hybrid emulsion
latex film
hydrophobicity
thermal stability
mechanical properties
