膨胀玻化微珠表面改性及其机理研究

发布时间：2018-03-31 09:04

本文选题：膨胀玻化微珠　切入点：表面改性　出处：《硅酸盐通报》2016年11期

【摘要】：分别使用无机矿粉、胶乳、乳化硅油对膨胀玻化微珠进行表面改性,对比三种改性剂对膨胀玻化微珠的堆积密度、体积吸水率、筒压强度的影响,并对表面改性机理进行了分析。结果表明:三种改性剂均能有效作用于玻化微珠表面,无机矿粉在玻化微珠开口孔和表面生成水化产物对其进行封堵与包裹,乳化硅油在玻化微珠表面形成一层硅烷的憎水层,胶乳在玻化微珠表面形成具有一定厚度的胶粘膜包裹层。无机矿粉可有效增加玻化微珠的筒压强度,乳化硅油可高效降低玻化微珠吸水率,胶乳可提高玻化微珠的筒压强度及降低吸水率,是一种有效的玻化微珠表面改性剂。
[Abstract]:Inorganic mineral powder, latex and emulsified silicone oil were used to modify the surface of expanded vitrified microspheres, and the effects of three modifiers on the density, volume water absorption and pressure strength of the expanded vitrified beads were compared. The mechanism of surface modification was analyzed. The results showed that the three modifiers could effectively act on the surface of vitrified microbeads, and inorganic mineral powder formed hydration products on the open pores and surfaces of vitrified beads for sealing and encapsulating them. The emulsified silicone oil formed a hydrophobic layer of silane on the surface of the vitrified microbeads, and the latex formed a gel mucosal coating with a certain thickness on the surface of the vitrified microbeads. The inorganic mineral powder can effectively increase the compressive strength of the vitrified microbeads. Emulsified silicone oil can effectively reduce the water absorption of vitrified microbeads and latex can increase the pressure strength and decrease the water absorption of glass microbeads. It is an effective surface modifier for vitrified microbeads.
【作者单位】：华南理工大学材料科学与工程学院;广州石井力展新型建筑材料有限公司;
【基金】：广州市重大科技项目(2013Y2-00112) 广州市建筑节能专项(J-2012-26) 广州市白云区科技项目(2012-KZ-76)
【分类号】：TU52

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