新型显示聚乙烯醇偏光膜基膜结构与功能调控及工程实现

聚乙烯醇（PVA）偏光膜基膜是TFT-LED和OLED等新型显示的基础材料，目前100%依赖进口，是制约我国新型显示国家战略的“卡脖子”问题。本项目针对国产PVA基膜存在结构非均匀性大、碘染色加工中拉伸比小、染色不均等差距，通过校企合作组建从基础和工程科学研究到中试、工业生产的攻关创新团队，拟：1.采用同步辐射X射线散射、固体核磁和中子散射等先进方法和技术，研究探明PVA基膜分子、微纳米凝聚态和薄膜整体等多尺度结构非均匀性的调控机理和技术方案；2.基于国内唯一PVA基膜生产企业皖维集团的小试、中试和工业生产线，开发高端PVA基膜原材料，实现高拉伸比PVA基膜的工业生产并开始替代进口；3.探索薄型化、高耐候PVA基膜材料体系和加工方法，为新型显示发展对光学膜提出的新需求积累技术方案。本项目力图突破我国新型显示中“卡脖子”偏光膜基膜技术，推进安徽省新型显示战略性新兴产业区域集聚发展基地的建设。

Polyvinyl alcohol (PVA) base film for producing polarizing plates is the basic material of new displays, i.e. TFT-LED and OLED, which is 100% imported.This "bottle-necking" problem significantly restricts the national strategy of new displays in China. Aiming at solving the weak performances of domestic PVA base films, i.e. the large structural heterogeneity, small stretch ratio and uneven dyeing in iodine dyeing process, this project plans to establish a research and innovation team through university-enterprise cooperation. We will solve problems in fundamental scientific and engineering researches, pilot test and even industrial production from the following plans: (1) With the assistance of advanced experimental techniques, such as in-situ synchrotron radiation X-ray scattering, Solid-state Nuclear Magnetic Resonance and neutron scattering, the detailed mechanisms and the technique solutions to control the multiscale structural heterogeneity of PVA base films, including molecular architecture, micro-nano condensed state and the whole film, will be investigated; (2) Based on the laboratory-test, pilot-test and industrial production line in Anhui Wanwei Group Co., Ltd., the only manufacturer of PVA base film in China, we’ll develop the high-quality PVA raw materials and realize the industrial production of PVA base film with large tensile ratio, which is expected to replace the imported PVA films; (3) New PVA materials for base films and the corresponding processing methods will be developed to meet the requirement of new display, i.e. the thinness and high weather resistance, which accumulates sufficient basic theories and technical solutions for the development of new displays in China. This project aims to break through the "bottle-necking" problem of the PVA base film for producing polarized plates in China's new display industry chain, and promotes the construction of regional agglomeration development of the strategic new display industries in Anhui Province.