Environmentally Friendly Packaging Materials Based on Thermoplastic Starch
Environmentally Friendly Packaging Materials Based on Thermoplastic Starch
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DOI：
10.15255/cabeq.2018.1548
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发表时间：
2019
影响因子：
1.5
通讯作者：
V. Bulatović;Lucija Mandić;Anamarija Turković;D. Grgić;A. Jozinović;Romana Zovko;E. G. Bajsić
中科院分区：
文献类型：
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作者：
V. Bulatović;Lucija Mandić;Anamarija Turković;D. Grgić;A. Jozinović;Romana Zovko;E. G. Bajsić
低密度聚乙烯（LDPE）广泛用作包装材料，因此使用寿命短，但环境持久性长。减少LDPE作为包装材料对环境影响的替代方案是将其与淀粉等碳水化合物聚合物混合。因此，本研究的重点是使用Brabender捏合室制备含有不同量的TPS的LDPE和热塑性淀粉（TPS）的生物基共混物。由于LDPE/ TPS共混物的不相容性，添加含有2mol%酸酐基团的苯乙烯-乙烯/丁烯-苯乙烯嵌段共聚物（SEBS-g-MA）作为增容剂。分析了可生物降解的亲水性TPS及其含量、相容剂的加入对LDPE/TPS共混物性能的影响。通过热重分析（TG）、差示扫描量热法（DSC）、扫描电子显微镜（SEM）和吸水率（WA）等手段对材料进行了表征。基于形态结构的结果，TPS相在LDPE基体中的良好分散与增容剂的引入，这导致这些材料的热性能和阻隔性能更好。
Low-density polyethylene (LDPE) is extensively used as packaging material, and as such has a short service life, but long environmental persistence. The alternative to reducing the impact of LDPE as packaging material on the environment is to blend it with carbohydrate-based polymers, like starch. Therefore, the focus of this investigation was to prepare bio-based blends of LDPE and thermoplastic starch (TPS) containing different amounts of TPS using a Brabender kneading chamber. Due to incompatibility of LDPE/ TPS blends, a styrene–ethylene/butylene–styrene block copolymer, grafted with maleic anhydride (SEBS-g-MA) containing 2 mol % anhydride groups, was added as a compatibilizer. The effect of the biodegradable, hydrophilic TPS, its content, and the incorporation of the compatibilizer on the properties of LDPE/TPS blends were analysed. The characterization was performed by means of thermogravimetric analysis (TG), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), and water absorption (WA). Based on the results of the morphological structure, a good dispersion of the TPS phase in LDPE matrix was obtained with the incorporation of compatibilizer, which resulted in better thermal and barrier properties of these materials.