摘要
采用氯化亚砜使纳米SiO2表面的羟基被氯原子取代后与水性光引发剂2959发生反应,制备出可引发水性UV树脂聚合的功能纳米SiO2,研究了反应温度和反应时间对纳米SiO2表面接枝率的影响,并用红外光谱仪(FT-IR)、粒径测试仪和热重分析仪(TG)对其进行分析和表征。FT-IR和粒径测试结果表明,水性光引发剂2959成功地被接枝到纳米SiO2表面。TG分析表明,反应温度为40℃和反应时间为4 h时,纳米SiO2表面聚合物接枝率较好,分别为15.94%和17.37%。红外分析结果表明,改性SiO2经过改性后由于其表面接枝了光引发剂2959而具有一定的光引发聚合功能。
The hydroxyl groups on the surface of the nano-silica are replaced by chlorine atoms using thionyl chloride.Then the reaction between nano-silica and photoinitiator 2959 is carried out and nano-silica which can initiate the polymerization of waterborne UV resin is obtained.The effects of reaction temperature and reaction time in nano-silica surface grafting rate are studied.The product is analyzed and characterized by infrared spectrometer （FT-IR）,particle size measuring instrument and thermogravimetric analyzer （TG）.Infrared spectrometer and particle size test results show that the photoinitiator 2959 is successfully grafted to the surface of nano-silica.TG analysis indicates that when reaction temperature is 60℃ and reaction time is 4 h,the nano-silica surface grafting rates are15.94％ and 17.37％,respectively.FT-IR result suggests that the functional nano-silica is of certain initiation polymerization property because light initiator 2959 is grafted onto nano-silica.
出处
《现代化工》
CAS
CSCD
北大核心
2014年第10期120-123,共4页
Modern Chemical Industry
基金
国家自然科学基金项目(21174055)
关键词
纳米SIO2
水性UV树脂
聚合
光引发剂
接枝率
nano-silica
water-borne UV resin
polymerization
photoinitiator
grafting rate
