Cellulose Nanoparticles Extracted from Sugarcane Bagasse and Their Use in Biodegradable Recipients for Improving Physical Properties and Water Barrier of the Latter

• 作者: Ademar Benévolo Lug?o Ant?nio Jedson Caldeira Brant Natália Naime Patrícia Ponce
• 来源期刊: 材料科学与应用期刊(英文)
• 学科: 工学
• 关键词: Sugarcane BAGASSE CELLULOSE from Alkaline Extraction Acid Hydrolysis of CELLULOSE Celullose NANOPARTICLES Film-Forming SUSPENSIONS BIODEGRADABLE Packaging
• 年，卷（期）: clkxyyyqkyw_2020,（1）
• 页码范围: 81-133
• 页数: 53页
• 分类号: TS7

摘要

The present work firstly aimed to obtain cellulose from sugarcane bagasse by using alkaline methods in pulping/delignifying and, at bleaching stages, using sodium chlorite, glacial acetic acid, and hydrogen peroxide, associated to NaOH/KOH. The process was carried out at temperatures varying from 55°C to 110°C, under magnetic stirring in various steps lasting from 2 h to 12 h. The yields of the two cellulose extracted, SCB24-Na-I and SCB24-Na-II, were 37% and 41%, respectively, from samples of ca. 15 g of the bagasse. Secondly, it is to extract nanoparticles from the obtained celluloses via acid hydrolysis (with 77% H2SO4) to lately be tested as reinforcement in biodegradable packagings. Both celluloses and their respective nanoparticles were characterized by several techniques, among them ATR-FTIR, DSC-TGA, XRD, SEM, and TEM. Despite that the yields of cellulose nanoparticles have been low, the preliminary studies of their use in biodegradable films coated on biodegradable pots were promising.