Rodrigues Débora da S, Schmitt Patricia O, Cordeiro Lincoln Audrew, Rodrigues Marlon B B, Ribeiro Ana Carolina R, Bosenbecker Mariane W, Silva Sarah Kalli S, Carreno Neftali L, Gatto Darci A, Silva Silvia H F da, Cholant Camila M, Missio André Luiz
Center of Engineering, Federal University of Pelotas, Pelotas 96010-610, Brazil.
Technological Development Center, Federal University of Pelotas, Pelotas 96010-610, Brazil.
Polymers (Basel). 2025 Jan 2;17(1):105. doi: 10.3390/polym17010105.
This study investigates the sustainable use of spp. bark through different chemical (hydrothermal, acid, alkaline, and bleaching) and physical (milling) pretreatments in the production of sustainable films. Valorization of agro-industrial residues and the demand for sustainable materials pose challenges for environmentally responsible solutions. spp. bark, rich in cellulose, hemicellulose, and lignin, is a promising source for creating sustainable materials like films. In this study, the use of chemical and physical treatments aims to optimize biomass extraction and improve the chemical, thermal, mechanical, and optical properties of the films. The films showed an excellent light barrier capacity, with a transmittance below 1%. Crystallinity indices varied with the pretreatment: 8.15% for hydrothermal, 7.01% for alkaline, 7.63% for acid, and 10.80% for bleaching. The highest crystallinity value was obtained through bleaching, by removing amorphous components like lignin and hemicellulose. The alkaline pretreatment yielded stronger films (maximum stress of 8.8 MPa, Young's modulus of 331.3 MPa) owing to the retained lignin and the hemicellulose reinforcing the material. This study contributes to the field of sustainable development by converting residues into valuable materials and by advancing the circular economy. The films' specific properties make them suitable for applications like sustainable packaging, addressing environmental and industrial challenges.
本研究通过不同的化学（水热、酸、碱和漂白）和物理（研磨）预处理方法，研究了[物种名称]树皮在可持续薄膜生产中的可持续利用。农业工业残留物的增值以及对可持续材料的需求，对环境友好型解决方案提出了挑战。富含纤维素、半纤维素和木质素的[物种名称]树皮，是制造薄膜等可持续材料的有前途的来源。在本研究中，使用化学和物理处理旨在优化生物质提取，并改善薄膜的化学、热、机械和光学性能。这些薄膜表现出优异的阻光能力，透光率低于1%。结晶度指数随预处理而变化：水热法为8.15%，碱法为7.01%，酸法为7.63%，漂白法为10.80%。通过去除木质素和半纤维素等无定形成分，漂白获得了最高的结晶度值。由于保留的木质素和半纤维素增强了材料，碱预处理产生了更强的薄膜（最大应力为8.8MPa，杨氏模量为331.3MPa）。本研究通过将残留物转化为有价值的材料以及推进循环经济，为可持续发展领域做出了贡献。薄膜的特殊性能使其适用于可持续包装等应用，解决了环境和工业挑战。
