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Preparation of Lignin/TiO2 Nano Composites and Preparation of Nanocellulose-based UV-shielding Film |
Received:January 17, 2021 |
DOI:10.11980/j.issn.0254-508X.2021.05.003 |
Key Words:lignin titanium dioxide nano composites UV-shielding |
Fund Project:国家重点研发计划(2016YFE0125800);浙江省自然科学基金(LY20C160006)。 |
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Abstract:Alkali lignin was used as a biological template inducer, and lignin/TiO2 UV-shielding nanoparticles were successfully synthesized by hydrothermal method. Comprehensive characterization results showed that lignin/TiO2 composite nanoparticles had anatase crystal form, good nanoparticle size and thermal stability, it also confirmed that the esterification like reaction took place between the oxygen-containing functional groups of lignin and hydroxyl groups on the surface of titanium dioxide. Thus, lignin and titanium dioxide formed a composite material with an incarcerated structure. Besides, the UV-shielding property of the film prepared by lignin/TiO2 nanoparticles and nanocellulose hydrogel was studied. The results showed that the nanocellulose hydrogel composite film with 10% lignin/TiO2 nanoparticles could absorb about 90% UV light at the all band (200~400 nm), indicating that lignin/TiO2 nano composites had a good UV-shielding capability. |
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