DHDOPO接枝改性多壁碳纳米管及其对聚乳酸性能的影响
发布时间：2018-08-18 12:34
【摘要】：首先将多壁碳纳米管(p-MWCNTs)用混合浓酸氧化成羧基化MWCNTs(MWCNTs-COOH),然后与氯化亚砜(SOCl_2)反应得酰氯化MWCNTs(MWCNTs-COCl);将9,10-二氢-9-氧杂-10-磷杂菲-10-氧化物(DOPO)与二乙醇胺(DEA)反应制备DOPO的衍生物DHDOPO;再将DHDOPO与MWCNTs-COCl进行接枝反应得表面功能化的MWCNTs(MWCNTs-COO-DH);最后经熔融共混法制备聚乳酸(PLA)/MWCNTs-COO-DH复合材料。用核磁共振氢谱和透射电子显微镜表征MWCNTs-COO-DH的结构和微观形貌;用电子万能试验机、扫描电子显微镜、微型燃烧量热计等测定PLA/MWCNTs-COO-DH复合材料的力学性能、冲击断面形貌、燃烧性能及残炭层形貌。结果表明,实验成功合成了目标产物DHDOPO,并将其接枝到MWCNTs表面形成了典型核-壳结构的MWCNTs-COO-DH;适量的MWCNTs-COO-DH可均匀分散在PLA基体中形成良好的界面结合;质量分数为0.1%的MWCNTs-COO-DH可显著提高PLA的力学性能,并能降低其可燃性和火灾危险性。
[Abstract]:Multiwalled carbon nanotubes (p-MWCNTs) were oxidized to carboxylated MWCNTs (MWCNTs-COOH) with mixed concentrated acid, and then reacted with sulfoxide chloride (SOCl_2) to form acyl chlorinated MWCNTs (MWCNTs-COCl). Surface functionalized MWCNTs (MWCNTs-COO-DH) was prepared by grafting DHDOPO with MWCNTs-COCl and polylactic acid (PLA) / MWCNTs-COO-DH composite was prepared by melt blending method. The structure and microstructure of MWCNTs-COO-DH were characterized by nuclear magnetic resonance spectroscopy (NMR) and transmission electron microscope (TEM). The mechanical properties and impact section morphology of PLA/MWCNTs-COO-DH composites were measured by electronic universal testing machine, scanning electron microscope and micro combustion calorimeter. Combustion performance and residual carbon layer morphology. The results showed that the target product DHDOPOO was successfully synthesized and grafted onto the surface of MWCNTs to form a typical core-shell MWCNTs-COO-DH.The proper amount of MWCNTs-COO-DH could be uniformly dispersed in the PLA matrix to form a good interfacial bonding. MWCNTs-COO-DH with 0.1% mass fraction can significantly improve the mechanical properties of PLA and reduce its flammability and fire hazard.
【作者单位】： 天津科技大学化工与材料学院;天津出入境检验检疫局工业产品安全技术中心;
【基金】：国家自然科学基金资助项目(51102179) 天津市自然科学基金资助项目(14JCYBJC16800)
【分类号】：O633.14
，
本文编号：2189488
[Abstract]:Multiwalled carbon nanotubes (p-MWCNTs) were oxidized to carboxylated MWCNTs (MWCNTs-COOH) with mixed concentrated acid, and then reacted with sulfoxide chloride (SOCl_2) to form acyl chlorinated MWCNTs (MWCNTs-COCl). Surface functionalized MWCNTs (MWCNTs-COO-DH) was prepared by grafting DHDOPO with MWCNTs-COCl and polylactic acid (PLA) / MWCNTs-COO-DH composite was prepared by melt blending method. The structure and microstructure of MWCNTs-COO-DH were characterized by nuclear magnetic resonance spectroscopy (NMR) and transmission electron microscope (TEM). The mechanical properties and impact section morphology of PLA/MWCNTs-COO-DH composites were measured by electronic universal testing machine, scanning electron microscope and micro combustion calorimeter. Combustion performance and residual carbon layer morphology. The results showed that the target product DHDOPOO was successfully synthesized and grafted onto the surface of MWCNTs to form a typical core-shell MWCNTs-COO-DH.The proper amount of MWCNTs-COO-DH could be uniformly dispersed in the PLA matrix to form a good interfacial bonding. MWCNTs-COO-DH with 0.1% mass fraction can significantly improve the mechanical properties of PLA and reduce its flammability and fire hazard.
【作者单位】： 天津科技大学化工与材料学院;天津出入境检验检疫局工业产品安全技术中心;
【基金】：国家自然科学基金资助项目(51102179) 天津市自然科学基金资助项目(14JCYBJC16800)
【分类号】：O633.14
，
本文编号：2189488
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