Preparation and Ultraviolet Shielding Properties Characterization of Tannic Acid-Phytic Acid/Polyvinyl Alcohol Composite Films

XIE Haiyan; DENG Jiayi; ZHOU Yeyao; LIU Li; ZHU Ziwangyan; LIU Pengfei; LAI Dengwang

doi:10.19554/j.cnki.1001-3563.2026.07.004

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Packaging Engineering ›› 2026, Vol. 47 ›› Issue (7) : 25-33. DOI: 10.19554/j.cnki.1001-3563.2026.07.004

Preparation and Ultraviolet Shielding Properties Characterization of Tannic Acid-Phytic Acid/Polyvinyl Alcohol Composite Films

XIE Haiyan, DENG Jiayi, ZHOU Yeyao, LIU Li, ZHU Ziwangyan, LIU Pengfei, LAI Dengwang^*

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Abstract

In response to the problem of insufficient ultraviolet shielding performance of polyvinyl alcohol (PVA) films, the work aims to prepare a high-performance composite film that can meet the ultraviolet protection requirements of food and drug packaging to expand the application scope of PVA-based packaging materials. Phytic acid (PA) and tannic acid (TA) were added to polyvinyl alcohol to make a composite film, the ultraviolet transmittance of the film in a certain wavelength range was tested, and the impact of PA and TA content on the ultraviolet shielding performance of the film was investigated. With the addition of TA alone, the ultraviolet transmittance of the PVA film was less than 10% and the film showed good ultraviolet shielding ability. Adding PA alone also made the PVA film have a certain ultraviolet shielding ability, with its ultraviolet transmittance in the range of 60%-80%. When TA and PA were added into PVA composite film according to the ratio of 5%TA-10%PA, the film had a ultraviolet transmittance of almost 0, while maintaining good mechanical properties. The combination of PA and TA can significantly improve the ultraviolet shielding ability of the PVA film. The composite film has excellent ultraviolet protection effect, which makes it have a wide application prospect in food and drug packaging and other fields.

Key words

polyvinyl alcohol / tannic acid / phytic acid / composite film / ultraviolet shielding

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XIE Haiyan, DENG Jiayi, ZHOU Yeyao, LIU Li, ZHU Ziwangyan, LIU Pengfei, LAI Dengwang. Preparation and Ultraviolet Shielding Properties Characterization of Tannic Acid-Phytic Acid/Polyvinyl Alcohol Composite Films[J]. Packaging Engineering. 2026, 47(7): 25-33 https://doi.org/10.19554/j.cnki.1001-3563.2026.07.004

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