期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 9, 期 33, 页码 11223-11237出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.1c03637
关键词
lignin; titanium dioxide nanocomposites; lignin coating; nanocomposite-doped lignin coating; antimicrobial; UV protection
资金
- Department of Biotechnology (DBT)
- Department of Science and Technology (DST)
- CSIR
- CIAB
- ICMR
Lignin, a natural and nontoxic biopolymer, has been developed as a material for coatings and nanocomposites, showing its potential for multifunctional behavior. It can act as a capping, stabilizing, and reducing agent for fabricating versatile nanomaterials, and exhibits excellent antioxidant, antimicrobial, and UV-blocking properties.
Lignin, a natural and nontoxic biopolymer, is an emerging material for the development of coatings, films, gels, adhesives, and adsorbents. Further, lignin holds a great potential to act as a capping, stabilizing, and reducing agent for fabricating versatile nanomaterials. In this work, both the coating material and titanium dioxide nanocomposites were developed using lignin. Initially, lignin was used as a matrix for developing titanium dioxide (TiO2) nanocomposites in a single step in a green manner. These newly developed nanocomposites exhibited excellent antioxidant, antimicrobial, and UV-blocking properties when compared with the pristine lignin or commercial TiO2 nanoparticles. Further, the lignin-based coating material was prepared using a simple, scalable, and straightforward method. The lignin coating was then doped in situ with the newly developed lignin-TiO2 nanocomposites and also with the commercial TiO2 nanoparticles (with varied quantities, 1-5% w/w) to improve the UV-blocking and antimicrobial properties of the native coating. Comparative studies were performed among all the lignin coatings (both doped and undoped) which showed that the lignin coating consisting of 5% w/w kraft lignin-based TiO2 nanocomposites exhibited the highest UV-blocking and promising antimicrobial potential. Finally, the TiO2 nanocomposite-doped lignin coating was administered on a cotton fabric which revealed a promising antimicrobial activity. This work accentuates the valorization of lignin via developing coatings and nanomaterials comprising improved multifunctional behavior for application in personal protective equipment.
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