Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 47, Pages 32565-32573Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b12044
Keywords
cellulose nanocrystal; poly(ethylene glycol); polymer substrate; iridescent coatings; cholesteric liquid crystal; interface adhesion
Funding
- National Natural Science Foundation of China [51103073, 21277073]
- CSC scholarship (China Scholarship Council) [201608320064]
- Six Talents Summit Program of Jiangsu Province
- 333 High-Level Talent Cultivation Program of Jiangsu Province
- Priority Academic Program Development of Jiangsu Higher Education Institutions
Ask authors/readers for more resources
The broad utility as an environmentally friendly and colorful coating of cellulose nanocrystal (CNC) was limited by its instability of coloration, brittleness, and lack of adhesion to a hydrophobic surface. In the present work, a neutral polymer, poly(ethylene glycol) (PEG) was introduced into CNC coatings through evaporation-induced self-assembly (EISA) on polymer matrices. The structure-color and mechanical properties of the composite coating or coating film were characterized by UV-vis spectroscopy, polarized light microscopy (PLM), scanning electron microscopy (SEM), wide-angle X-ray diffraction (WXRD), and tensile tests. Results showed that the reflective wavelength of the iridescent CNCs could be finely tuned by incorporation of PEG with varied loadings from 2.5 to 50 wt %, although the high loading content of PEG would produce some side effects because of the severe microphase separation. Second, PEG played an effective plasticizer to improve the ductility or flexibility of the CNC coating or coating film. Furthermore, as a compatibilizer, PEG could effectively and tremendously enhance the adhesion strength between CNCs and neutral polymer matrices without destroying the chiral nematic mesophases of CNCs. Environmentally friendly CNC/PEG composites with tunable iridescence, good flexibility, and high bonding strength to hydrophobic polymer matrices are expected to be promising candidates in the modern green paint industry.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available