无卤阻燃红麻增强聚乳酸复合材料研究

发布时间：2018-04-10 06:06

本文选题：红麻　切入点：芳香族磷酸酯　出处：《南京理工大学》2015年硕士论文

【摘要】：本文对红麻纤维进行表面改性,并将其和芳香族磷酸酯类阻燃剂与聚乳酸(PLA)熔融共混,制备了三个阻燃增强体系,分别为PLA/改性红麻/PX-220、PLA/改性红麻/PX-220/FB88#、RDP/ZnO/红麻三元自组装体系复合阻燃增强聚乳酸材料。在PLA/改性红麻/PX-220体系中,采用改性红麻纤维作为增强材料,通过比较不同添加量改性红麻纤维的复合材料的拉伸强度确定了改性红麻纤维的最佳添加量为10wt%,增强效果显著；而后选用PX-220作为单一阻燃剂阻燃红麻增强聚乳酸复合材料,发现PX-220显著提高了复合材料的耐热性能和阻燃性能。在PLA/改性红麻/PX-220/FB88#体系中,改性红麻纤维仍为主要的增强材料,且恒定改性红麻添加量为最优添加量,将PX-220和FB88#复配阻燃红麻增强聚乳酸复合材料,结果表明：PX-220和FB88#的复配使用提高了复合材料的耐热性能；FB88#的添加使得复合材料的拉伸强度得到提高；PX-220/FB88#阻燃体系能够有效抗熔滴,成炭显著。RDP/ZnO/红麻纤维三元自组装体系是先用二水合乙酸锌对红麻纤维进行改性,使其表面包覆一层ZnO颗粒,再用制备的ZnO包覆的红麻纤维原位吸附RDP而得,将这种三元自组装体系与聚乳酸先后经过溶液共混、熔融共混制备聚乳酸复合材料。研究发现：随着红麻纤维的添加量的增加,复合材料的力学性能直线上升；RDP不仅改善了红麻与聚乳酸基体的相容性,同时显著提高了复合材料的阻燃性能；ZnO催化了复合材料燃烧成炭,且在RDP和红麻之间起到了“桥梁”作用。
[Abstract]:In this paper, three flame retardant reinforcement systems were prepared by surface modification of kenaf fiber and melt blending with aromatic phosphate flame retardant and polylactic acid (PLA).The composites of PLA/ modified kenaf / PX-220 / modified kenaf / PX-220 / FB88 #RDP / ZnO / kenaf ternary self-assembly system were flame-retarded and reinforced polylactic acid materials.In the PLA/ modified kenaf / PX-220 system, the modified kenaf fiber was used as the reinforcing material. By comparing the tensile strength of the composites with different amount of modified kenaf fiber, the optimum addition amount of the modified kenaf fiber was determined to be 10 wts. the strengthening effect was remarkable.Then PX-220 was selected as a single flame retardant kenaf reinforced polylactic acid composite. It was found that PX-220 significantly improved the heat resistance and flame retardancy of the composites.In the system of PLA/ modified kenaf / PX-220 / FB88#, modified kenaf fiber is still the main reinforcing material, and constant modified kenaf content is the optimum addition amount. PX-220 and FB88# are mixed with flame retardant kenaf to reinforce polylactic acid composite.The results show that the addition of FB88# can improve the tensile strength of FB88# composites, and the FB88# / PX-220 / FB88# flame retardant system can effectively resist the melt drop.The ternary self-assembly system of carbon. RDP / ZnO / kenaf fiber was prepared by modifying the kenaf fiber with zinc acetate dihydrate and coating it with a layer of ZnO particles, and then using the prepared ZnO coated kenaf fiber to adsorb RDP in situ.The ternary self-assembly system and polylactic acid (PLA) were successively blended in solution to prepare polylactic acid composites.It was found that the mechanical properties of the composites increased linearly with the increase of the content of kenaf fiber. RDP not only improved the compatibility of kenaf and polylactic acid matrix,At the same time, the flame retardancy of the composites was significantly improved. ZnO catalyzes the combustion of the composites to form carbon, and acts as a "bridge" between RDP and kenaf.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB332

【参考文献】