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- 2018
聚乙烯醇修饰Sb2O3/氯丁胶乳复合材料的制备及其分散稳定性
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Abstract:
制备水基亚微米Sb2O3浆液，用聚乙烯醇（PVA）作空间稳定剂对Sb2O3表面修饰后，与氯丁胶乳（CRL）复合制备一种阻燃的PVA修饰Sb2O3/CRL（Sb2O3-PVA/CRL）复合材料。探究了最优修饰工艺及其对Sb2O3-PVA/CRL分散稳定性的影响规律，从粒径分布、FTIR和DTA-TGA等角度探讨PVA修饰明显提升Sb2O3分散稳定性的作用机制。结果表明，研钵研磨使Sb2O3粒径微细化，是制备亚微米Sb2O3的有效手段；PVA修饰Sb2O3粉末在3 447 cm-1处的—OH伸缩振动特征峰减弱，1 091 cm-1处的C—O特征吸收峰消失，推测化学键力是PVA包覆Sb2O3粉末的重要方式；获得最优分散稳定性的修饰工艺为：PVA与Sb2O3质量比为2%、反应温度为90℃、反应时间为30 min；采用最优修饰工艺制备的Sb2O3-PVA/CRL复合材料静置6 h内有好的分散稳定性。 Water-based suspension of submicron Sb2O3 was prepared, and then modified with polyvinyl alcohol (PVA) as a steric stabilizer, the modified Sb2O3 was composed with chloroprene latex (CRL) for preparing the flame retardant latex composite (Sb2O3-PVA/CRL). The modification parameters and their influences on dispersion stability were investigated. The mechanism of the improved dispersion stability produced with PVA interface modification was estimated in terms of distribution of particle size, FTIR and DTA-TGA analysis. The results show that the grinding of mortar is an effective means of preparing the submicron Sb2O3 via micronization action. The stretching vibration peak of -OH groups being weaker at 3 447 cm-1and the peak of C-O groups disappearing at 1 091 cm-1 in the FTIR spectra of Sb2O3 modified with PVA, concluding that the chemical-bonding plays an important role in the modification. The optimum modification parameters of the best dispersion stability are PVA to Sb2O3 mass ratio of 2%, reaction temperature of 90℃ and reaction time of 30 min. The suspension of Sb2O3-PVA/CRL has good dispersion stability when it has been stored for 6 h. 安徽省高等教育提升计划省级科学研究项目（TSKJ2016B30）；安徽工程大学引进人才科研启动基金（2016YQQ006）；地方高校国家级大学生创新创业训练计划项目（201510363124）
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