Improving the controlled-release effects of composite flame retardant by loading on porous attapulgite and coating
Improving the controlled-release effects of composite flame retardant by loading on porous attapulgite and coating
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DOI：
10.1016/j.ceramint.2022.10.281
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发表时间：
2022-10
影响因子：
5.2
通讯作者：
Siwen Wang;Zihang Xu;Tao Xu
中科院分区：
文献类型：
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作者：
Siwen Wang;Zihang Xu;Tao Xu
磷酸三丁酯（ATP）是陶瓷的重要原料之一，常用作载体。为控制复合阻燃剂（CFR）在火灾下的释放速率，满足多级阻燃要求，采用真空负压法将4种单体阻燃剂分别负载在活化预处理后的多孔ATP载体上。然后在单体阻燃剂表面通过原位聚合反应制备了具有缓释效果的CFR纳米粒子。之后选择热稳定性高、阻燃性能优异的羟基锡酸锌、苯乙烯、三聚氰胺甲醛树脂和二氧化硅作为四种单体阻燃剂在ATP载体上的包覆层。环境扫描电子显微镜和能谱仪测试结果表明，CFR纳米粒子的负载和包覆效果令人满意。X射线光电子能谱的测试结果进一步证实了ATP载体上良好的负载条件和涂膜形成。热重-差热扫描量热测试表明，负载和包覆在ATP载体上的CFR纳米粒子的阻燃时间均得到延长，具有较好的控释效果。
The attapulgite (ATP) is one of important raw materials of ceramics and often used as a loading carrier. To control the release rate of composite flame retardant (CFR) when exposed to a fire, and to meet the multi-stage flame retarding requirements, the vacuum negative pressure method was adopted to load four kinds of monomer flame retardants on porous ATP as a carrier after activating pretreatment, respectively. Then CFR nanoparticles with controlled-release effects were prepared by the in-situ polymerization reaction on the surface of monomer flame retardants. After that, zinc hydroxyl stannate, styrene, melamine formaldehyde resin and silicon dioxide with high thermal stability and excellent flame retarding properties were selected as the coating layer of four kinds of monomer flame retardants on ATP carrier. Test results of environmental scanning electron microscope and energy dispersive spectrometer show the satisfactory loading and coating results of CFR nanoparticles. Test results of X-ray photoelectron spectroscopy further confirm the excellent loading conditions and coating film formation on ATP carrier. The thermogravimetry-differential thermal scanning calorimetry tests indicate that the flame retarding duration of both loaded and coated CFR nanoparticles on ATP carrier is prolonged and has a satisfactory controlled-release effect.