期刊
POLYMERS
卷 12, 期 2, 页码 -出版社
MDPI
DOI: 10.3390/polym12020407
关键词
nano cellulose crystalline; waterborne polyurethane; silver nano particles; antibacterial property; adhesion
资金
- National Key R&D Program of China [2017YFC0703501]
- National Natural and Science Foundation [BK20170926, BK20150878]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX18_0962]
- National First-class Disciplines
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Doctorate Fellowship Foundation of Nanjing Forestry University
To endow wood plate with antimicrobial properties, waterborne polyurethane (WPU) coatings incorporated with nano cellulose crystalline (NCC) and silver nanoparticles (AgNPs) were prepared. AgNPs were obtained by the chemical reactions of silver nitrate solution and sodium borohydride solution. The scribe testing results showed that the adhesion of the NCC-WPU composites was improved with the addition of NCC. The adhesion reached its peak when the amount of NCC added was 1%. Scanning electron microscopy (SEM) observation displayed that the NCC dispersed into the WPU without aggregation. NCC was well able to bind WPU and wood cell walls tightly together. Atomic force microscopy (AFM) and ultraviolet-visible (UV-vis) results revealed that WPU/NCC/AgNPs composites were homogeneous. This compatibility was also confirmed by transmission electron microscopy (TEM) analysis. The antibacterial property was improved too. When the adding amount of NCC was 0.5%, and the proportion of silver elements added was 5%, the antibacterial effect was at its best. As a comparison, the antibacterial effect of hybrid colloid without the addition of NCC was far less than that of including NCC. The WPU/NCC/AgNPs composite could be applied as an antibacterial coating in wood materials.
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