Al(OH)_3/聚丙烯酸酯复合乳液的制备及其对涂层玻璃纤维网格布机械性能的影响

Preparation and Characterization of Al(OH)_3/Polyacrylate Composite Emulsion and Its Application as Coating on Glass Fiber Grid

通过种子乳液聚合的方法,采用纳米氢氧化铝(ATH)无机改性剂,制备ATH/聚丙烯酸酯复合乳液(PA)作为玻璃纤维纤网格布的涂层。通过粒径分析、透射电镜(TEM)、热重分析(TG)和极限氧指数值(LOI)对复合乳液的结构和性能进行了表征。通过扫描电镜和电子织物强力仪对复合乳液涂层后玻纤布的表面形态和力学性能进行观察和测试。结果表明:纳米ATH粉体可以有效参与乳液聚合反应;当ATH含量为3‰时,复合乳液的固含量高,粒径分布均匀且较窄,成膜性、热稳定性均较高;该复合乳液可以在玻纤网格布上形成均匀致密的薄膜,涂层后玻纤网格布的断裂强力和LOI值均有所增大。

Al（OH）3（ATH）/Polyacrylate composite emulsions are prepared by seed emulsion polymerization method,in which ATH nano-powder with different loadings is used as flame-retardant modifier.The prepared emulsions are used as coating for glass fiber grid.The structure and properties of the composite emulsions are characterized by particle size analysis,Transmission Electron Microscopy（TEM）,thermogravimetry（TG） analysis and Limited Oxygen Index（LOI）.The surface appearance and mechanical properties of the glass fiber grid coated with the composite emulsions are measured by Scanning Electron Microscopy and E-fabric strength tester.It is found that ATH nano-powder is effectively concluded in the emulsion copolymerization.The composite emulsion films show better flame retardance and higher thermal stability than those of pure polyacrylate film,especially in the case of 3wt‰ ATH loading.The ATH/polyacrylate composite emulsions can form smooth wall-like films on the surface of the glass fiber grid.The mechanical properties of the glass fiber grids are improved after being coated with the composite emulsions.