基于紫外屏蔽性能的云母/MnO_(2)/TiO_(2)复合半导体微米片的制备及在聚丙烯中的应用  

Preparation of Composite Semiconductor Micro-sheets with UV Shielding Performance and Its Application in Polypropylene

作　　者：姜胜寒 曹长林 肖荔人 杨唐 钱庆荣 陈庆华 JIANG Shenghan;CAO Changlin;XIAO Liren;YANG Tang;QIAN Qingrong;CHEN Qinghua(College of Environmental Science and Engineering,Engineering Research Center of Polymer Green Recycling of Ministry of Education,Fujian Key Laboratory of Pollution Control&Resource Reuse,Fujian Normal University,Fuzhou 350007,China)

机构地区：[1]福建师范大学环境科学与工程学院,聚合物资源绿色循环利用教育部工程研究中心,福建省污染控制与资源循环利用重点实验室,福州350007

出　　处：《高等学校化学学报》2022年第8期1-9,共9页Chemical Journal of Chinese Universities

基　　金：国家重点研发计划项目(批准号:2019YFC1908200);福建省自然科学基金(批准号:2021J01200)资助。

摘　　要：为改善聚丙烯(PP)的抗老化性能,采用化学液相沉积法合成了云母/MnO_(2)/TiO_(2)复合半导体微米片,并通过物理共混法将微米片引入PP中.利用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、拉曼光谱仪、紫外-可见漫反射光谱仪(UV-Vis DRS)、傅里叶变换红外光谱仪(FTIR)及电子万能试验机等考察了二氧化钛(TiO_(2))负载量、二氧化锰(MnO_(2))添加量及pH等条件对微米片形貌、晶体结构及紫外屏蔽性能的影响,并研究了微米片对PP的抗老化改性效果.结果表明,控制MnO_(2)添加量为2.0%、TiO_(2)负载量为20%、p H值为1.6时,可以诱导微米片中的TiO_(2)由锐钛矿型向金红石型转变,微米片包覆状态佳、紫外屏蔽性能优异.紫外老化27 d后,与纯PP相比,经复合半导体微米片改性后的PP产生的C=O数量减少,表面形貌保持度较高;其拉伸强度保持率提升38%,抗紫外老化性能显著提高.In order to improve the aging resistance of polypropylene(PP),Mica/MnO_(2)/TiO_(2) composite semiconduc⁃tor microsheet was synthesized by chemical liquid deposition method.Then,the microsheets were introduced into PP by physical blending method.The morphology,crystal structure and UV absorption properties were characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD),Raman spectroscopy(RS),UV-Vis diffuse reflection spectroscopy(UV-Vis DRS)and electronic universal testing.The influence of TiO_(2) contents,concentrations of MnO_(2) and pH values on the morphology structure,UV shielding performance of microsheet and the anti-aging modification effect of the microsheet on PP were investigated.The results showed that the crystal type of TiO_(2) in the microsheet could be transformed from anatase to rutile when the addition level of MnO_(2) was 2.0%,the supporting amount of TiO_(2) was 20%,and the pH value was 1.6.The microsheet had good coating condition and excellent UV shield perfor⁃mance.Compared with pure PP,after UV aging for 27 d,the amount of C=O produced by PP modified by composite semiconductor microsheet decreased,the surface morphology retention was higher.The UV aging resistance was significantly improved with a 38%increasing tensile strength retention rate.

关 键 词：云母/MnO_(2)/TiO_(2) 液相沉积 紫外屏蔽 聚丙烯 

分 类 号：O631[理学—高分子化学] O641[理学—化学]