埃洛石纳米管复配DOPO对聚乳酸阻燃及力学性能的影响OA
Effect of DOPO combined with halloysite nanotubes on the flame retardant and mechanical property of polylactic acid
为提高阻燃聚L⁃乳酸(PLLA)的热稳定性,以9,10⁃二氢⁃9⁃氧杂⁃10⁃磷杂菲⁃10⁃氧化物(DOPO)为阻燃剂、埃洛石纳米管(HNTs)为耐热稳定剂,熔融共混法制备PLLA/DOPO/HNTs复合材料.采用热失重分析、差示扫描量热测试、极限氧指数测试(LOI)、垂直燃烧测试、锥形量热测试、力学性能测试等对制备的复合材料进行表征,并分析其作用机理.研究结果表明:DOPO对于 PLLA的阻燃效应作用显著,PLLA/5DOPO的LOI可以达到28%;HNTs弥补了DOPO对PLLA热稳定性的不利影响;PLLA/5DOPO的初始热分解温度仅为260.3℃,远低于 PLLA的初始分解温度(329.7℃);PLLA/4.5DOPO/4.5HNTs的初始分解温度为 308.5℃,且LOI依然维持在 28%左右,其垂直燃烧等级达到最高等级 V⁃0 级,热释放速率峰值(pHRR)和总热释放量(THR)也为样品中最低;PLLA/4.5DOPO/4.5HNTs的断裂强度与PLLA基本一致.认为:DOPO和HNTs通过熔融共混方法应用于PLLA,制备得到的复合材料同时具有优良耐热稳定性、阻燃性和力学性能.
In order to improve thermal stability of flame retardant poly(L-lactic acid)(PLLA),PLLA/DOPO/HNTs composite materials were prepared via melt blending method,with 9,10-dihydro-9-oxa-10-phosphorophenanthrene-10-oxide(DOPO)as flame retardant,halloysite nanotubes(HNTs)as thermal stabilizer.The properties of the prepared composite samples were studied using thermogravimetric analysis(TGA),differential scanning calorimetry(DSC),limiting oxygen index(LOI)test,vertical combustion test,cone calorimetry test,mechanical property test.In addition,the mechanism of action was analyzed.The results showed that DOPO was effective flame retardant for PLLA and the LOI of PLLA/5DOPO was reached 28%.HNTs compensated the negative effects of DOPO on the thermal stability of PLLA.The onset thermal decomposition temperature of PLLA/5DOPO was only around 260.3℃,much lower than that of PLLA(329.7℃).While the onset decomposition temperature of PLLA/4.5DOPO/4.5HNTs was about 308.5℃and the LOI was remained around 28%,the vertical combustion level was reached the highest V-0 grade,the peak heat release rate(pHRR)and total heat release(THR)were also the lowest in the samples.The tensile strength of PLLA/4.5DOPO/4.5HNTs was consistent with that of PLLA.It is considered that DOPO and HNTs are applied to PLLA through the melt blending method,resulting in a composite material that simultaneously possesses excellent thermal stability,flame retardancy and mechanical property.
肖杨;李万鑫;李晨;王文庆;董振峰;王锐;朱志国
北京服装学院材料设计与工程学院,北京,100029北京服装学院材料设计与工程学院,北京,100029北京服装学院材料设计与工程学院,北京,100029北京服装学院材料设计与工程学院,北京,100029北京服装学院材料设计与工程学院,北京,100029北京服装学院材料设计与工程学院,北京,100029北京服装学院材料设计与工程学院,北京,100029
化学化工
聚乳酸埃洛石纳米管9,10⁃二氢⁃9⁃氧杂⁃10⁃磷杂菲⁃10⁃氧化物(DOPO)阻燃热稳定性力学性能残炭率极限氧指数
polylactic acidhalloysite nanotube9,10-dihydro-9-oxa-10-phosphophenanthrene-10-oxide(DOPO)flame retardantthermal stabilitymechanical propertychar residuelimiting oxygen index
《棉纺织技术》 2026 (10)
38-46,9
北京学者团队资助项目(RCQJ20303)
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