生物质基单宁甲醛捕捉剂油水比对薄木饰面板甲醛释放的影响

Effects of Oil-Water Ratio of Biomass-Based Tannin-Formaldehyde Capture Agent on Formaldehyde Release from Thin Wood Veneer

基于壳聚糖采用乳化交联法制备的生物质基单宁甲醛捕捉剂为研究对象,探讨不同油水比的生物质基单宁甲醛捕捉剂对薄木饰面板甲醛释放的影响。通过对比不同油水比制备的甲醛捕获剂形态、包封量和包封率以及对甲醛水溶液降解情况,分析油水比对甲醛捕获剂的影响以及在最佳油水比时,研究将生物质基单宁甲醛捕捉剂应用到人造板中吸收薄木饰面板释放的甲醛的情况。结果表明,油水比为4∶1时可以获得表面光滑的球形结构甲醛捕捉剂;油水比为2∶1、3∶1、4∶1制备的生物质基单宁甲醛捕捉剂在60 min内对甲醛水溶液的降解分别可达24.68%、33.17%、38.84%;相比于未添加甲醛捕捉剂的薄木饰面板,添加了油水比为4∶1时制备的甲醛捕捉剂薄木饰面板在24、48、72 h降解甲醛的效率分别达到了46.68%、50.64%、53.20%。因此,采用高油水比时,生物质基单宁甲醛捕捉剂可以持续有效地捕获甲醛。

In this paper,a biomass-based formaldehyde capture agent prepared by emulsion cross-linking method using tannin and chitosan was used as the research object to investigate the effects of oil-water ratio on the performance of the agent that was applied to thin wood veneer.By comparing the morphology,encapsulation amount,encapsulation rate and degradation of formaldehyde aqueous solution of the agent prepared by different oil-water ratios,the effects of the oil-water ratio on the agent were examined.The agent with optimal oil-water ratio was applied to the artificial thin wood veneer.The results showed that when the oil-water ratio was 4∶1,a formaldehyde capture agent with a smooth spherical structure could be obtained;the agents prepared with oil-water ratios of 2∶1,3∶1,and 4∶1 could degrade 24.68%,33.17%,and 38.84%of formaldehyde aqueous solution within 60 minutes.Compared to the thin wood veneer without applying the agent,the agent prepared with the oil-water ratio of 4∶1 could degrade 46.68%,50.64%and 53.20%of the formaldehyde released from the wood veer at 24,48,and 72 h.Therefore,the agent with high oil-water ratio(4∶1)could continuously and effectively scavenge formaldehyde.