正十二烷基三甲氧基硅烷改性聚磷酸铵及其在丙烯酸酯密封胶中的应用  

Ammonium polyphosphate modified by n-dodecyl trimethoxysilane and its application in acrylate sealant

作　　者：毕建华 吴京兴 郝万军[1] 王忠 樊民 陈乐 徐宝罗 符丽莎 BI Jianhua;WU Jingxing;HAO Wanjun;WANG Zhong;FAN Min;CHEN Le;XUN Baoluo;FU Lisha(State Key Laboratory of Marine Resources Utilization in the South China Sea,School of Materials Science and Engineering,Hainan University,Haikou 570208,China;Hainan Sequoia Technology Industrial Co.,Ltd.,Haikou 570228,China)

机构地区：[1]海南大学材料科学与工程学院,南海海洋资源利用国家重点实验室,海口570228 [2]海南红杉科创实业有限公司,海口570208

出　　处：《功能材料》2022年第12期12162-12169,共8页Journal of Functional Materials

基　　金：海口市重点科技项目(2021046);海口市重大科技项目(2021010)。

摘　　要：通过离子交换反应将γ-氨丙基三乙氧基硅烷(KH550)接枝于聚磷酸铵(APP)表面,然后加入水解后的正十二烷基三甲氧基硅烷(DTMS)引发共缩合反应,成功制备出改性聚磷酸铵(C-APP)。采用FT-IR、XPS、SEM等方法分别对APP和C-APP进行表征。研究结果表明,长链烷烃及Si—O—Si结构接枝于APP表面,疏水角由20.0°变为146.9°。以此为基础,将APP和C-APP加入到丙烯酸酯密封胶(AS)当中,制备出一系列阻燃AS复合材料并对其阻燃性能、耐水性、力学性能等进行了测试分析。研究表明,C-APP可以进一步提升AS复合材料的阻燃性能,当加入20%(质量分数)C-APP时,LOI达到26%(体积分数),UL-94等级为V-0级;APP/AS浸水后失重率为17.5%,而C-APP/AS则降低至9.6%;此外,C-APP的加入改善了AS复合材料的力学性能,增进了APP与AS的相容性。By ion exchange reaction,γ-Aminopropyl triethoxysilane(KH550)was grafted on the surface of ammonium polyphosphate(APP),and then hydrolyzed n-dodecyl trimethoxysilane(DTMS)was added to initiate the co-condensation reaction.The modified ammonium polyphosphate(C-APP)was successfully prepared.The APP and C-APP were characterized by FT-IR,XPS and SEM.The results showed that long-chain alkanes and Si-O-Si structures were grafted on the surface of APP,and the hydrophobic angle changed from 20.0°to 146.9°.A series of AS flame retardant sealants were prepared and tested for their water resistance.The results show that C-APP can further improve the flame retardant performance of AS composites.When 20 wt%C-APP is added,the LOI reaches 26 vol%and the UL-94 grade is V-0.The weight loss rate of APP/AS after immersion was 17.5%,while that of C-APP/AS decreased to 9.6%.In addition,the addition of C-APP improves the mechanical properties of AS composites and improves the compatibility between APP and AS.

关 键 词：丙烯酸酯密封胶 聚磷酸铵 离子交换 阻燃 正十二烷基三甲氧基硅烷 

分 类 号：TB332[一般工业技术—材料科学与工程]