用于纸基材料抗老化的纳米TiO_2制备及结构表征  

Preparation and Characterization of Nano Titanium Dioxide for the Anti-aging of Paper

作　　者：迟聪聪 来贤[1,2,3,4] 王亮 张素风 CHI Cong-cong;LAI Xian;WANG Liang;ZHANG Su-feng(School of Light Industry Science and Engineering;National Demonstration Center for Experimental Light Chemistry Engineering Education;Key Laboratory of Paper Based Functional Materials of China National Light Industry;Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development,Shaanxi University of Science ＆ Technology,Xi＇an 710021,China)

机构地区：[1]陕西科技大学轻工科学与工程学院,西安710021 [2]陕西科技大学轻化工程国家级实验教学示范中心,西安710021 [3]陕西科技大学中国轻工业纸基功能材料重点实验室,西安710021 [4]陕西科技大学陕西省造纸技术及特种纸品开发重点实验室,西安710021

出　　处：《包装工程》2018年第19期37-42,共6页Packaging Engineering

基　　金：国家自然科学基金青年基金(31600476)

摘　　要：目的对纳米TiO_2进行有机无机改性,使其保持原有的抗紫外特性,同时降低光催化活性,实现对纸基材料的抗老化保护。方法以正硅酸乙酯(TEOS)为前驱体,通过溶胶-凝胶法在纳米TiO_2表面包覆纳米二氧化硅(SiO_2)壳层,再用硅烷偶联剂KH570进行有机改性,制备无机-有机复合微粒,对试样进行SEM, TEM, UV-Vis, XRD, FT-IR分析表征,探讨TEOS用量对复合微粒形貌、抗紫外效果以及光催化性的影响。结果经过改性后SiO_2以无定形态成功包覆于纳米TiO_2表面,且以Si—O—Ti键结合,复合微粒的分散性得到明显提高。包覆层的厚度与TEOS用量有关,随着TEOS用量的增加,在不影响复合微粒紫外屏蔽效果的同时,复合微粒的光催化性能明显降低。结论复合改性降低了纳米TiO_2的光催化性,而对抗紫外性的影响较小,这对于其在纸质文物抗老化保护液中的应用非常有利。The work aims to conduct organic-inorganic modification of nano-TiO2 to keep the original anti-UV properties and reduce the photocatalytic activity, so as to realize the anti-aging protection of paper-based materials. Sol-gel method was applied to prepare SiO2 coatings on the surface of nano-TiO2 with tetraethoxysilane（TEOS） as precursor and then silane coupling agent of γ-（Methacryloxypropyl） trimethoxy Silane（KH570） was used for organic modification to prepare inorganic-organic composite particles. The sample was characterized and analyzed by Scanning electron microscopy（SEM）, Transmission electron microscope（TEM）, Fourier transform infrared spectroscopy（FT-IR）, X-ray Diffraction（XRD） and Ultraviolet-visible spectroscopy（UV-Vis）. The influence of TEOS dosage on the microstructure, UV resistance and photocatalysis performance of composite particles was explored. The modified SiO2 was ly coated on the surface of nano-TiO2 in amorphous state and bonded as Si-O-Ti. The dispersibility of composite particles was improved obviously. The coating thickness was related to TEOS dosage. With the increase of TEOS dosage, the photocatalytic property of composite particles was significantly decreased, while the UV resistance capability almost remained the same. The composite modification of nano-TiO2 reduces its photocatalytic activity, but has little effect on its UV resistance, which is very beneficial to its application in the anti-aging protection solution of paper cultural relics.

关 键 词：纳米TIO2 有机无机改性 分散性 抗紫外 光催化性 

分 类 号：TS801.6[轻工技术与工程]