School of Aerospace Engineering and Applied Mechanics, Tongji University, 1239 Siping Road, Shanghai 200092, PR China.
School of Aerospace Engineering and Applied Mechanics, Tongji University, 1239 Siping Road, Shanghai 200092, PR China; The Shanghai Key Laboratory of Space Mapping and Remote Sensing for Planetary Exploration, Tongji University, Shanghai 200092, PR China.
Int J Biol Macromol. 2022 Nov 1;220:238-249. doi: 10.1016/j.ijbiomac.2022.08.070. Epub 2022 Aug 17.
In this study, the polylactic acid (PLA)/reversible thermochromic microcapsule (TCM) packaging application film was successfully synthesized by the blown film process. White mineral oil (WMO) was used as a dispersant to prepare PLA/TCM extruded materials with different mass fractions, in which the mass fraction of TCM was up to 20 wt% and the structural, thermal, mechanical, barrier, thermochromic, and heat storage-release properties were evaluated. It was found that WMO had a plasticizing effect, the elongation at break and water vapor transmission rate of the films with the addition of 7 wt% TCM were increased by 533 % and 31.38 %, respectively. For each thermochromic film, significant thermochromic and energy storage release phenomena were observed. For instance, 20 wt% TCM thermochromic film was most effective for prolonging the holding time and suspending the temperature drop rate. In general, thermochromic packaging films with optimized constitutes were successfully synthesized by the blown film process, which provides essential reference significance for the large-scale thermochromic film applications.
在这项研究中，通过吹塑工艺成功合成了聚乳酸（PLA）/可逆热致变色微胶囊（TCM）包装应用薄膜。以白油（WMO）为分散剂，制备了不同质量分数的 PLA/TCM 挤出材料，其中 TCM 的质量分数高达 20wt%，并对其结构、热学、力学、阻隔性、热致变色和储热释放性能进行了评价。结果表明，WMO 具有增塑作用，添加 7wt%TCM 的薄膜的断裂伸长率和水蒸气透过率分别提高了 533%和 31.38%。对于每种热致变色薄膜，都观察到了显著的热致变色和能量存储释放现象。例如，20wt%TCM 热致变色薄膜在延长保持时间和减缓温度下降速率方面最为有效。总的来说，通过吹塑工艺成功合成了具有优化组成的热致变色包装薄膜，为大规模热致变色薄膜的应用提供了重要的参考意义。
