University of Gafsa, Faculty of Sciences of Gafsa, Laboratory for the Application of Materials to the Environment, Water, and Energy (LR21ES15), Gafsa 2112, Tunisia; University of Gafsa, Faculty of Sciences of Gafsa, Gafsa 2112, Tunisia.
Department of Chemistry, College of Science, University of Ha'il, P.O. Box 2440, Ha'il, Saudi Arabia.
Int J Biol Macromol. 2023 Dec 1;252:126456. doi: 10.1016/j.ijbiomac.2023.126456. Epub 2023 Aug 25.
This study evaluated the feasibility of using cactus mucilage (CM) to elaborate biobased composite films blended with styrene-butadiene rubber latex (SBL). The CM was extracted and precipitated with ethanol (CMET) and isopropanol (CMIS). Mucilage-based films were formulated using three levels of mucilage (4, 6, and 8 wt%). The microstructure, thickness, moisture content, density, water contact angle, water vapor permeability, film solubility, thermal stability, and toughness of mucilage films blended with SBL (SBL/CMET and SBL/CMIS) were measured. The properties of mucilage-based films varied systematically, depending on the concentration of mucilage. The addition of SBL to CM film produces compatible, hydrophobic, flexible, and stiffer films with low moisture contents and good barrier properties. The mucilage film incorporated with 6 wt% CMET and CMIS reached the highest Young's modulus of 1512 ± 21 and 1988 ± 55 MPa, respectively. The DSC of produced films reveals that the Tg of SBL/CMIS is lower than that of SBL/CMIS. The synthesized films were structurally stable at high temperatures. The biodegradability of the composite films buried in the ground shows that the produced films are 100 % biodegradable after 40 days. Thus, CM blended with SBL can benefit specific applications, especially food packaging.
本研究评估了使用仙人掌黏液（CM）来阐述与苯乙烯-丁二烯橡胶乳胶（SBL）混合的生物基复合膜的可行性。CM 用乙醇（CMET）和异丙醇（CMIS）提取和沉淀。基于黏液的薄膜采用三种黏液水平（4、6 和 8 wt%）进行配方设计。测量了与 SBL（SBL/CMET 和 SBL/CMIS）混合的黏液膜的微观结构、厚度、水分含量、密度、水接触角、水蒸气透过率、膜溶解度、热稳定性和韧性。基于黏液的膜的性质根据黏液浓度系统地变化。SBL 添加到 CM 膜中会产生相容的、疏水的、柔性的和刚性的膜，其水分含量低且具有良好的阻隔性能。掺入 6 wt% CMET 和 CMIS 的黏液膜达到了最高的杨氏模量 1512 ± 21 和 1988 ± 55 MPa。所生产的膜的 DSC 表明，SBL/CMIS 的 Tg 低于 SBL/CMIS。合成膜在高温下结构稳定。埋在地下的复合膜的生物降解性表明，在 40 天后，所生产的膜可 100%生物降解。因此，与 SBL 混合的 CM 可以有益于特定的应用，特别是食品包装。
