Journal
NANOMATERIALS
Volume 9, Issue 1, Pages -Publisher
MDPI
DOI: 10.3390/nano9010107
Keywords
surface morphology; TEMPO-oxidized fibers; optical properties; hazy
Categories
Funding
- Introduction of Advanced International Project of Forestry Science and Technology [2015454]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Doctorate Fellowship Foundation of Nanjing Forestry University
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Traditionally, inorganic nanoparticles (SiO2, TiO2) have been utilized to tune the optical haze of optoelectronic devices. However, restricted to complex and costly processes for incorporating these nanoparticles, a simple and low-cost approach becomes particularly important. In this work, a simple, effective, and low-cost method was proposed to improve optical haze of transparent cellulose nanofibril films by directly depositing micro-sized 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-oxidized wood fibers (coating method). The obtained films had a high total transmittance of 85% and a high haze of 62%. The film samples also showed a high tensile strength of 80 MPa and excellent thermal stability. Dual sides of the obtained films had different microstructures: one side was extremely smooth (root-mean-square roughness of 6.25 nm), and the other was extremely rough (root-mean-square roughness of 918 nm). As a reference, micro-sized TEMPO-oxidized wood fibers and cellulose nanofibrils were mixed to form a transparent and hazy film (blending method). These results show that hazy transparent films prepared using the coating method exhibit superior application performances than films prepared using the blending method.
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