石墨烯量子点对PVA偏光膜的改性  

Modification of PVA Polarizing Film by Graphene Quantum Dots

作　　者：杨洋 汪亚威 黄睿 蔡福水 陈国华[1] YANG Yang;WANG Yawei;HUANG Rui;CAI Fushui;CHEN Guohua(College of Materials Science and Engineering,Huaqiao University,Xiamen 361021,China;Xiamen Xiangfuxing Technology Limited Company,Xiamen 361101,China)

机构地区：[1]华侨大学材料科学与工程学院,福建厦门361021 [2]厦门祥福兴科技股份有限公司,福建厦门361101

出　　处：《华侨大学学报（自然科学版）》2021年第4期501-506,共6页Journal of Huaqiao University(Natural Science)

基　　金：福建省科技厅科研资助项目(2017H2001);华侨大学研究生科研创新能力培养计划项目(2018H6012)。

摘　　要：用刮膜机在镜面不锈钢钢板上铺出聚乙烯醇(PVA)原膜,再经过染色、拉伸、补正等工艺制备PVA偏光膜.通过水热法制备的石墨烯量子点(GQDs)尺寸主要分布在2~4 nm,且其水溶液在500~400 nm间的光透过率下降22%,将PVA粉体溶在制得的GQDs水溶液中,制备PVA/GQDs复合偏光膜.结果表明:与PVA偏光膜相比,单片透过率略有下降,但GQDs的加入使偏光膜的直交透过率降低且低于0.1%,从而提高偏光膜的偏振度,达到99.9%以上.The original polyvinyl alcohol(PVA)film was spread on stainless steel plate by a membrane casting equipment,and then the PVA polarizing film was prepared by dyeing,stretching and correcting.The size of graphene quantum dots(GQDs)prepared by hydrothermal method mainly distributed in 2-4 nm,and the optical transmittance of its aqueous solution decreased by 22%in the range of 500-400 nm.PVA/GQDs composite polarizing film was prepared by dissolving PVA powder in GQDs aqueous solution.The results show that compared with PVA polarizing film,the transmittance of single chip decreases slightly.However,with the addition of GQDs,the direct cross transmittance of the polarizing film is lower than 0.1%,and the polarization degree of the polarizing film is improved up to 99.9%.

关 键 词：PVA偏光膜 石墨烯量子点 PVA/GQDs复合偏光膜 直交透过率 偏振度 

分 类 号：O484.41[理学—固体物理] TB34[理学—物理]