Department of Cosmetology and Health Care, Kao Yuan University, Kaohsiung County 82101, Taiwan.
Department of Cosmetology and Health Care, Kao Yuan University, Kaohsiung County 82101, Taiwan.
Int J Biol Macromol. 2024 Mar;262(Pt 1):129911. doi: 10.1016/j.ijbiomac.2024.129911. Epub 2024 Feb 5.
The challenge of global climate change has drawn people's attention to the issue of carbon emissions. Reducing the use of petroleum-derived materials and increasing the use of biodegradable materials is a current focus of research, especially in the packaging materials industry. This study focused on the use of environmentally friendly plastics and waste paper as the main materials for packaging films. Poly(butylene succinate-co-lactate) (PBSL) was modified with maleic anhydride (MA) to form a biobased compatibilizer (MPBSL), which was then blended with a mixture (WPS) of waste-paper powder (WP) and silica aerogel powder (SP) to form the designed composite (MPBSL/WPS). The modification of PBSL with MA improved interfacial adhesion between PBSL and WPS. The structure, thermal, and mechanical properties, water vapor/oxygen barrier, toxicity, freshness, and biodegradability of MPBSL/WPS films were evaluated. Compared with the PBSL/WP film, the MPBSL/WPS film exhibited increased tensile strength at break of 4-13.5 MPa, increased initial decomposition loss at 5 wt% of 14-35 °C, and decreased water/oxygen permeabilities of 18-105 cm/m·d·Pa. In the water absorption test, the MPBSL/WPS film displayed about 2-6 % lower water absorption than that of the PBSL/WP film. In the cytocompatibility test, both MPBSL/WPS and PBSL/WP membrane were nontoxic. In addition, compared with PBSL/WP film and the control, the MPBSL/WPS film significantly reduced moisture loss, extended the shelf life, and prevented microbial growth in vegetable and meat preservation tests. Both MPBSL/WPS and PBSL/WP films were biodegradable in a 60-day soil biodegradation test; the degradation rate was 50 % when the WP or WPS content was 40 wt%. Our findings indicate that the composites would be suitable for environmentally sustainable packaging materials.
全球气候变化的挑战引起了人们对碳排放问题的关注。减少石油衍生材料的使用和增加可生物降解材料的使用是当前研究的重点，特别是在包装材料行业。本研究以环保塑料和废纸为主要包装薄膜材料，采用马来酸酐（MA）对聚丁二酸丁二醇酯-己二酸丁二醇酯（PBSL）进行改性，形成生物基增容剂（MPBSL），然后与废纸粉（WP）和硅气凝胶粉（SP）的混合物（WPS）共混，形成设计的复合材料（MPBSL/WPS）。MA 对 PBSL 的改性提高了 PBSL 与 WPS 的界面粘结性。评价了 MPBSL/WPS 薄膜的结构、热性能、力学性能、水蒸气/氧气阻隔性、毒性、保鲜性和生物降解性。与 PBSL/WP 薄膜相比，MPBSL/WPS 薄膜的断裂拉伸强度提高了 4-13.5 MPa，5 wt%时的初始分解损失提高了 14-35°C，水/氧气透过率降低了 18-105 cm/m·d·Pa。在吸水率测试中，MPBSL/WPS 薄膜的吸水率比 PBSL/WP 薄膜低 2-6%。细胞相容性测试中，MPBSL/WPS 和 PBSL/WP 膜均无毒性。此外，与 PBSL/WP 薄膜和对照相比，MPBSL/WPS 薄膜在蔬菜和肉类保鲜测试中显著减少了水分损失，延长了保质期，防止了微生物生长。在 60 天的土壤生物降解试验中，MPBSL/WPS 和 PBSL/WP 薄膜均具有生物降解性，当 WP 或 WPS 含量为 40wt%时，降解率为 50%。研究结果表明，该复合材料将适用于环境可持续的包装材料。
