Development of an UV−Resistant Multilayer Film with Enhanced Compatibility between Carboxymethyl Cellulose and Polylactic Acid via Incorporation of Tannin and Ferric Chloride
Jian Xiao,
Tingting Liu,
Qiulu Chu,
Chaoguang Yu,
Yunlong Yin,
Lei Xuan,
Shufang Wu
Affiliations
Jian Xiao
Jiangsu Co−Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, China
Tingting Liu
Jiangsu Co−Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, China
Qiulu Chu
Jiangsu Co−Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, China
Chaoguang Yu
Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China
Yunlong Yin
Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China
Lei Xuan
Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China
Shufang Wu
Jiangsu Co−Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, 159 Longpan Road, Nanjing 210037, China
Carboxymethyl cellulose (CMC) and polylactic acid (PLA) are recognized for their environmental friendliness. By merging them into a composite film, packaging solutions can be designed with good performance. Nonetheless, the inherent interface disparity between CMC and PLA poses a challenge, and there may be layer separation issues. This study introduces a straightforward approach to mitigate this challenge by incorporating tannin acid and ferric chloride in the fabrication of the CMC−PLA. The interlayer compatibility was improved by the in situ formation of a cohesive interface. The resulting CMC/TA−PLA/Fe multilayer film, devoid of any layer separation, exhibits exceptional mechanical strength, with a tensile strength exceeding 70 MPa, a high contact angle of 105°, and superior thermal stability. Furthermore, the CMC/TA−PLA/Fe film demonstrates remarkable efficacy in blocking ultraviolet light, effectively minimizing the discoloration of various wood surfaces exposed to UV aging.
