Journal
JOURNAL OF ADHESION
Volume 97, Issue 1, Pages 38-52Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00218464.2019.1625039
Keywords
Isocyanate microcapsule; controlled release; wood adhesive
Funding
- Fundamental Research Funds for the Central Universities [2572018AB13, 2572018CP01]
Ask authors/readers for more resources
Controlled-release isocyanate microcapsules were synthesized as functional crosslinking to slow down the rate of crosslinking reactions in wood adhesive, improving water resistance. The microcapsules showed stable particle size, active NCO content, and efficient controlled-release properties, demonstrating promising applications in plywood adhesive.
In this study, controlled-release isocyanate microcapsules were synthesized as functional crosslinking to slowdown the rate of cross-linking reactions. The isocyanate microcapsules were prepared by In-situ polymerization with polymethylene polyphenyl polyisocyanates (PAPI) as core and Urea formaldehyde resin as shell in oil-in-water emulsions. The particle size distribution, chemical structure, morphology, activity, and stability of the microcapsules were comprehensively characterized. Finally, the microcapsules were applied in a wood adhesive to prepare water-resistant plywood. The results showed that the size of the microcapsules was around 100 mu m, the active content of NCO was about 23.5%, and the core content was approximately 80%. Compared with the stability of the bulk isocyanate, the stability of the isocyanate in microcapsules was significantly improved in the wood adhesive system. Furthermore, the isocyanate microcapsules showed highly efficient in plywood at different time, which indicated that isocyanate microcapsules could be controllable released in plywood applications.
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