以4-溴-1,8-萘酐为原料,与乙醇胺进行酰胺化,再在萘环4-位引入乙氧基供电子基团合成了萘酰亚胺荧光增白剂(FBA).以三聚氯氰为交联单体,用对氨基苯磺酸钠对紫外线吸收剂(UVA)2,4-二羟基-二苯甲酮进行了水溶性改性.采用红外光谱对目标产物进行了结构表征,运用紫外光谱、荧光光谱测试其光学性质.将制备的两种助剂单独或二者按一定比例复配涂布于纸张表面,通过紫外光加速返黄实验考察其对纸张的返黄抑制效果.结果表明,复配使用的萘酰亚胺FBA和水溶性UVA可以更好地发挥二者分子间的协同效应,返黄抑制效果优于单独使用,且m(萘酰亚胺):m(水溶性UVA)为1∶3时能达到最佳的抑制返黄效果.%Naphthalimide fluorescent brightening agent (FBA) was synthesized using 4-bromo-l, 8-naphthalic anhydride as raw material through amidation with ethanolamine, then introducing ethoxy electron-donating group into 4-bit of naphthalene ring. With cyanuric chloride as the crosslinking monomer, the water-solubility of ultraviolet absorber (UVA) 2,4-dihydroxy-benzophenone was modified by sodium p-ami-nobenzenesulfonate. The molecular structures were characterized by IR spectra;optical properties were measureed by UV spectra and fluorescence spectra. Coating the two prepared additives alone or blends of them with a certain proportion on the surface of the paper, the ultraviolet accelerated yellowing inhibition performance of them were studied. The results showed that: the blends of naphthalimide fluorescent brighteners and water-soluble UVA have better synergistic effect, have more excellent yellowing inhibition effect than them used alone, and the optimum ratio of fluorescent brighteners and UVA is 1:3.
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