辐照改性聚乙烯醇缩甲醛精密过滤材料的制备与性能分析  

Preparation and properties analysis of irradiation-modified polyvinyl formal precision filtering material

作　　者：王连才[1] 曹巍[1] 翟彤[1] 翟宇[1] 酒永斌[1] 曾心苗[1] 

机构地区：[1]北京市射线应用研究中心,北京100015

出　　处：《核技术》2014年第6期45-48,共4页Nuclear Techniques

基　　金：北京市科学技术研究院创新团队培养计划(No.IG201201C1)资助

摘　　要：聚乙烯醇缩甲醛过滤材料具有气孔细微、过滤精度高、通量大、无纤维脱落等特点,在精密过滤领域具有广阔的应用空间。本研究以聚乙烯醇PVA-1799和甲醛为主要原料,季戊四醇三丙烯酸酯为改性剂,利用γ射线辐照技术制备了改性聚乙烯醇缩甲醛(Poly(vinyl formal),PVF)过滤材料,对材料的泡孔结构、力学性能、尺寸稳定性、吸水率、耐水性能及耐油性能进行了测试与表征。结果表明,材料的孔径小于300μm,拉伸断裂强度达到3.01 MPa,撕裂强度达到13.23 MPa;以辐射技术所制备的泡沫材料尺寸稳定性良好,具有更佳的力学性能和耐油耐水性能。采用辐照技术能够简化PVF过滤材料生产工艺,减少无机酸和甲醛用量,减轻环境污染。Background： Poly （vinyl formal） （PVF） filter material has broad application in the field of precision filtration due to its unique properties, such as fine pore, high filtration precision, large flux and no fiber loss. Purpose： The goal of this work is to prepare modified PVF filter material by γ-radiation technology. Methods： Modified polyvinyl formal filter materials were prepared by γ-radiation technology with polyvinyl alcohol （PVA-1799） and formaldehyde as raw materials, and pentaerythritol triacrylate （PETA） as modifier. The compared properties of cell structure, mechanical properties, dimensional stability, water absorption, water resistance and oil resistance were tested and characterized. Results： The results showed that the material pore size was less than 300 μm, the tensile strength reached 3.01 MPa, and the tear strength was 13.23 MPa, which had good stability and better mechanical properties as well as oil resistance and water resistance abilities. Conclusion： γ-radiation technology can simplify the production process of PVF filter materials, reduce inorganic acid and formaldehyde dosage, and thus is beneficial for environment protection.

关 键 词：辐照改性 聚乙烯醇缩甲醛(Poly(vinyl formal) PVF) 精密过滤 

分 类 号：TL99[核科学技术—核技术及应用]