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- Title
Green Strong Cornstalk Rind-Based Cellulose-PVA Aerogel for Oil Adsorption and Thermal Insulation.
- Authors
Yi, Xiaoyang; Zhang, Zhongxu; Niu, Junfeng; Wang, Hongyan; Li, Tiankun; Gong, Junjie; Zheng, Rongbo
- Abstract
Cellulose-based aerogel has attracted considerable attention for its excellent adsorption capacity, biodegradability, and renewability. However, it is considered eco-unfriendly due to defibrillation of agriculture waste and requires harmful/expensive chemical agents. In this study, cornstalk rind-based aerogel was obtained via the following steps: green H2O2/HAc delignification of cornstalk rind to obtain cellulose fibers, binding with carboxymethyl cellulose (CMC)/polyvinyl alcohol (PVA) and freeze-drying treatment, and hydrophobic modification with stearic acid. The obtained aerogel showed high compressive strength (200 KPa), which is apparently higher (about 32 kPa) than NaClO-delignified cornstalk-based cellulose/PVA aerogel. Characterization of the obtained aerogel through SEM, water contact angle, etc., showed high porosity (95%), low density (0.0198 g/cm−3), and hydrophobicity (water contact angle, 159°), resulting in excellent n-hexane adsorption capacity (35 g/g), higher (about 29.5 g/g) than NaClO-delignified cornstalk-based cellulose/PVA aerogel. The adsorbed oil was recovered by the extrusion method, and the aerogel showed excellent recyclability in oil adsorption.
- Subjects
THERMAL insulation; AEROGELS; CARBOXYMETHYLCELLULOSE; CORNSTALKS; CONTACT angle; HEXANE; POLYVINYL alcohol
- Publication
Polymers (20734360), 2024, Vol 16, Issue 9, p1260
- ISSN
2073-4360
- Publication type
Article
- DOI
10.3390/polym16091260