超声振荡复合改性提高氢氧化镁表面分散性与阻燃效果  

Preparation of High Hydrophobicity and Flame Retardancy Composite Modified Magnesium Hydroxide by Ultrasound Oscillation

作　　者：宋肄业 徐金辉 沈文瑾 郦成 Yiye Song;Jinhui Xu;Wenjin Shen;Cheng Li(Mechanical&Chemical Engineering Department,Changzhou University Huaide College,Taizhou 214500,China)

机构地区：[1]常州大学怀德学院机械与材料工程系,江苏泰州214500

出　　处：《高分子材料科学与工程》2024年第10期73-79,共7页Polymer Materials Science & Engineering

摘　　要：文中制备出复合改性氢氧化镁阻燃剂,并用于脱脂棉的阻燃处理,以弥补棉的易燃缺陷,为棉制品的阻燃性能处理过程提供了新的阻燃剂选择。以硅烷偶联剂KH550和油酸钠作为复合改性剂,对Mg(OH)_(2)进行复合表面湿法改性,其复合改性条件为KH550与油酸钠的质量比2:1、改性剂总质量0.3g、Mg(OH)_(2)质量10.0g、改性时间30min、改性温度50℃。研究了改性氢氧化镁的表面疏水性能。结果表明,在超声波振荡分散作用下,氢氧化镁可快速进行复合改性,改性30min后的氢氧化镁活化指数可达到98.32%,接触角为150.5º,表面由亲水型转变为疏水型,分散性能明显提高。采用复合改性后的氢氧化镁对脱脂棉进行阻燃处理具有良好的阻燃性能,极限氧指数(LOI)值可达27.8%,达到阻燃级别。Composite modified magnesium hydroxide flame(MH)retardant was successfully designed and prepared in this paper to solve the cotton fabric flammability problem.In order to improve the hydrophobicity and flame retardancy of magnesium hydroxide Mg(OH)_(2),silane coupling agent KH550 and sodium oleate were used as composite modifier under wet condition,and the modified effects were evaluated by water contact angle(WCA)and activation index.The modification conditions are obtained as follows:m(KH550):m(sodium oleate)=2:1,total modifier mass is 0.3 g,m(Mg(OH)_(2))=10.0 g,reaction temperature is 50℃,time is 30 min.The results show that Mg(OH)_(2)could be modified with silane coupling agent KH550 and sodium oleate quickly,the activation index of Mg(OH)_(2)reaches 98.32%,while the WCA could reach 150.5º.After modification,the surface of Mg(OH)_(2)changes from hydrophilic to hydrophobic,and the flame retardancy is significantly improved compared with unmodified Mg(OH)_(2),the limiting oxygen index(LOI)of composite modified Mg(OH)_(2)cotton fabric material is 27.8%,which could achieve inflaming retarding level.

关 键 词：硅烷偶联剂 油酸钠 复合改性 氢氧化镁 棉 阻燃 

分 类 号：TQ314.248[化学工程—高聚物工业]