背景:Okara纤维素含量很高,绿色,可持续,和生物可降解聚合物具有许多潜在的工业应用。
结果:在这项研究中,我们通过水合制备了豆渣纤维素纳米纤维(CNFs)和壳聚糖(CH)的复合水凝胶,声波处理,并在100oC下加热30分钟,然后通过冷却来诱导它们的组装。考察了豆渣CNF(有和没有TEMPO氧化)和CH浓度对水凝胶结构和性能的影响,包括它们的微观结构,表面属性,流变性能,和热稳定性。我们的结果表明,阴离子豆渣CNF和阳离子CH之间存在静电吸引力,这促进了水凝胶的形成。表面,纹理,流变学,复合水凝胶的热稳定性能优于单一CH水凝胶,以及经过TEMPO氧化的CNF。对于TC-CH水凝胶,接触角为39.5°,界面张力为69.1mN/m,表面张力为1.44mN/m。
结论:在这项研究中,开发的新型水凝胶可用作食品中的一系列应用中的软材料,补充剂,保健品,化妆品,和毒品。本文受版权保护。保留所有权利。
BACKGROUND: Okara cellulose is a highly abundant, green, sustainable, and biodegradable polymer with many potential industrial applications. In this study, we fabricated composite hydrogels with okara cellulose nanofibers (CNFs) and chitosan (CH) by hydrating, sonicating, and heating them at 100 °C for 30 min, and then induced their assembly by cooling. The effects of okara CNF (with and without 2,2,6,6-tetramethylpiperidinyloxy (TEMPO) oxidation) and CH concentration on the structure and properties of the hydrogels was examined, including their microstructure, surface properties, rheological properties, and thermal stability.
RESULTS: Our results indicate that there was an electrostatic attraction between the anionic okara CNF and cationic CH, which facilitated hydrogel formation. The surface, textural, rheological, and thermal stability properties were better for the composite hydrogels than for the single CH ones, as well as for the CNF that had undergone TEMPO oxidation. For the TC-CH hydrogels, the contact angle was 39.5°, the interfacial tension was 69.1 mN m-1 , and the surface tension was 1.44 mN m-1 .
CONCLUSIONS: In this study, the novel hydrogels developed may be useful as a soft material in a range of applications in foods, supplements, health care products, cosmetics, and drugs. © 2023 Society of Chemical Industry.