CIDCA (Centro de Investigación y Desarrollo en Criotecnología de Alimentos), 47 y 116 S/N, La Plata, B1900AJJ Buenos Aires, Argentina; Centro Científico Tecnológico La Plata (CCT-La Plata) CONICET, Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CICPBA), Argentina.
CIDCA (Centro de Investigación y Desarrollo en Criotecnología de Alimentos), 47 y 116 S/N, La Plata, B1900AJJ Buenos Aires, Argentina; Centro Científico Tecnológico La Plata (CCT-La Plata) CONICET, Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CICPBA), Argentina; Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP), Argentina.
Int J Biol Macromol. 2024 May;266(Pt 1):131271. doi: 10.1016/j.ijbiomac.2024.131271. Epub 2024 Mar 30.
Yerba mate industrial processing produces tons of powder as a by-product, this yerba mate powder (YMP) is an excellent source of biomass to develop biodegradable materials. Cassava starch modified with 1,2,3,4-butane tetracarboxylic acid (BA) in the presence of sodium propionate as a catalyst is an eco-friendly option to obtain bioadhesives. This work aimed to develop sustainable laminates from starch-based adhesives and yerba mate powder and to study their physico-chemical, structural, and mechanical properties. Blends of bioadhesive and YMP were prepared (1:1, adhesive:YMP). Monolayer materials were obtained by thermo-compression and later assembled with adhesive to obtain bilayer laminates. Bioadhesive was able to bind the yerba mate by-product fibers, as evidenced by SEM microstructure analysis, the interactions of adhesive:substrate were elucidated by ATR-FTIR and supported by chemometrics analysis. The incorporation of the catalyst decreased the rugosity of materials and their mechanical performance was improved by the action of both acid concentration and catalyst presence, requiring higher energy for puncture. Thus, it was feasible to obtain mono and bilayer laminates as an eco-compatible alternative for the design of sustainable tray-like materials based on the industrial by-product of yerba mate.
巴拉圭冬青工业加工会产生大量粉末作为副产品，这种巴拉圭冬青粉（YMP）是开发生物降解材料的极好生物质来源。在丙酸钠作为催化剂的存在下，用 1,2,3,4-丁烷四羧酸（BA）对木薯淀粉进行改性是获得生物胶粘剂的环保选择。本工作旨在开发基于淀粉的胶粘剂和巴拉圭冬青粉的可持续层压板，并研究其物理化学、结构和机械性能。生物胶粘剂和 YMP 的共混物（1:1，胶粘剂：YMP）进行了制备。单层材料通过热压成型获得，然后用胶粘剂组装以获得双层层压板。SEM 微观结构分析表明，生物胶粘剂能够将巴拉圭冬青副产物纤维粘结起来，ATR-FTIR 的相互作用和化学计量分析支持了这一观点。催化剂的加入降低了材料的粗糙度，酸浓度和催化剂的存在提高了材料的机械性能，需要更高的能量来穿刺。因此，获得单和双层层压板是可行的，是基于巴拉圭冬青工业副产物设计可持续托盘状材料的生态兼容替代方案。
