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Author(s): |
Youying Tu, Department of Tea Science, Zhejiang University, Hangzhou 310029, China；
Xiaohong Cai, Department of Tea Science, Zhejiang University, Hangzhou 310029, China；
Le Ying, Department of Tea Science, Zhejiang University, Hangzhou 310029, China；
Youming Yu, School of Engineering, Zhejiang Forestry College, Lin’an 311300, China ;
Jianlin Tao, Hangzhou Easily Biotechnology Limited Company, Hangzhou 310029, China. |
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Abstract: |
It has been a very important topic about the release of free formaldehyde from artificial board in this century. In this study black tea residue, green tea residue, oolong tea stalk, pruned tea branch and stale green tea were designed to absorb free formaldehyde in the artificial board. The effects of different types and additional proportion of tea and waste tea products on particleboard properties were analyzed, the relationship between the decreasing level of free formaldehyde emission and the main contents of additive samples were discussed also. We found tea and waste tea products can reduce significantly formaldehyde-emission from particleboards. and improve other properties of particleboard. The results suggested that there are positive correlations between the reducing amount of free formaldehyde emission and the contents of three main compounds of tea polyphenols, amino acids and theaflavins. The free formaldehyde emission in pruned tea branch group and stale green tea group reduced to 51.3% and 35.5% respectively to compare with blank group. The effect of different additional proportion of tea and waste tea product on the formaldehyde absorbency of particleboards was 15% >10% >5%. To add green tea residue, pruned tea branch, or stale green tea could improve the particleboard quality.
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