将4-溴-1,8-萘酐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,将紫外光吸收剂（UVA）2,4-二羟基-二苯甲酮与萘酰亚胺引入同一分子中,合成了一种新型的高得率浆返黄抑制剂。并使其与丙烯酰胺按照一定比例聚合,得到一种能溶于水的聚合型返黄抑制剂。采用红外光谱和核磁氢谱对合成物质进行了结构表征,运用紫外光谱、荧光光谱测试其光学性质。将制备的3种助剂分别涂布于纸张表面,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,当3种助剂都使用最佳用量时,经26h紫外光加速老化后,抑黄效果依次排序为：返黄抑制剂聚合物〉返黄抑制剂单体〉萘酰亚胺FBA。
Naphthalimide fluorescent brightening agent (FBA) was synthesized from 4-bromo-1,8-naphthalic anhydride and ethanolamine via amidation, then joining ethoxy electron-donating group into 4-bit of naphthalene ring. With cyanuric chloride as the crosslinking monomer, a new yellowing inhibitor for high-yield pulp was synthesized through joining the ultraviolet absorber (UVA) 2,4-dihydroxy-benzophenone and naphthalimide fluorescent brightener in the same molecule. Then a water-soluble yellowing inhibitor polymer was obtained by copolymerization between it with acrylamide. The molecular structures were characterized by IR spectra and 1 H NMR;optical properties were measureed by UV spectra and fluorescence spectra. Coating the three prepared additives according to a certain concentration on the surface of paper, their yellowing inhibition effect were studied by UV accelerated yellowing experiments. The results show that: when the three additives use the optimal dosage, after 26h UV accelerated aging, the yellowing inhibition effect of them followed the order : yellowing inhibitor polymer 〉yellowing inhibitor monomer 〉naphthalimide FBA.
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