Xie Jiazhuo, Wang Zhou, Zhao Qinghua, Yang Yuechao, Xu Jing, Waterhouse Geoffrey I N, Zhang Kun, Li Shan, Jin Peng, Jin Geyang
College of Chemistry and Material Science, Shandong Agricultural University, 61 Daizong Street, Tai'an 271000, Shandong, China.
National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, National Engineering & Technology Research Center for Slow and Controlled Release Fertilizers, College of Resources and Environment, Shandong Agricultural University, 61 Daizong Street, Tai'an 271000, Shandong, China.
ACS Omega. 2018 Jan 30;3(1):1187-1196. doi: 10.1021/acsomega.7b02062. eCollection 2018 Jan 31.
The development of biodegradable packing materials is a global priority due to the huge volumes of plastic refuse entering landfills and the environment. In this study, a series of biodegradable nanocomposite films based on poly(butylene adipate--terephthalate) (PBAT) and reinforced with an organophilic layered double hydroxide (OLDH) were scale-up fabricated. The OLDH nanosheets with a basal spacing of 4.07 nm were presynthesized on a large-scale by solvent-free high-energy ball milling. All of the PBAT/OLDH nanocomposite films (0.5-4 wt % OLDH) showed a uniform dispersion of OLDH nanosheets in the PBAT matrix. A PBAT/OLDH film containing 1 wt % OLDH (denoted herein as OLDH-1) demonstrated outstanding thermal, optical, mechanical, and water vapor barrier properties compared with a pure PBAT film (OLDH-0), including a 37% reduction in haze and a 41.9% increase in nominal tensile strain at break dramatically. Furthermore, the food packaging measurement revealed that the OLDH-1 film showed a better packaging effect than the pure PBAT film and commercial polyethylene packing materials. The feasibility of scale-up manufacture and the excellent processability, manufacturing scalability, mechanical performance, optical transparency, water vapor barrier properties, and food packaging performance of the PBAT/OLDH nanocomposite films encourage their future application as biodegradable packaging films.
由于大量塑料垃圾进入垃圾填埋场和环境，可生物降解包装材料的开发成为全球优先事项。在本研究中，一系列基于聚（己二酸丁二醇酯-对苯二甲酸丁二醇酯）（PBAT）并以亲有机层状双氢氧化物（OLDH）增强的可生物降解纳米复合薄膜被放大制备。通过无溶剂高能球磨大规模预合成了基面间距为4.07nm的OLDH纳米片。所有PBAT/OLDH纳米复合薄膜（OLDH含量为0.5-4wt%）中，OLDH纳米片均在PBAT基体中均匀分散。与纯PBAT薄膜（OLDH-0）相比，含1wt%OLDH的PBAT/OLDH薄膜（此处记为OLDH-1）表现出优异的热、光学、机械和水蒸气阻隔性能，包括雾度降低37%，标称断裂拉伸应变显著增加41.9%。此外，食品包装测试表明，OLDH-1薄膜比纯PBAT薄膜和商用聚乙烯包装材料具有更好的包装效果。PBAT/OLDH纳米复合薄膜放大制造的可行性以及优异的加工性能、制造可扩展性、机械性能、光学透明度、水蒸气阻隔性能和食品包装性能，促使它们未来可作为可生物降解包装薄膜应用。
