摘要
以自制2-羟基-4-正辛氧基二苯甲酮(UV-531)为水性聚氨酯抗紫外改性剂,合成了一系列具有紫外吸收特性的水性聚氨酯乳液(UVWPU)。采用核磁氢谱、红外光谱、动态光散射粒径分析、紫外光谱等对改性后的水性聚氨酯进行结构表征和性能测试。将UVWPU应用于纸张表面施胶,探讨了UVWPU对纸张表面施胶性能的影响。核磁氢谱、红外光谱分析表明UV-531已成功制备并引入到UVWPU分子链上;当UV-531用量为2.0%时,UVWPU平均粒径为54.89nm,紫外吸光度为0.48,与纯水性聚氨酯乳液相比提升了585.7%。当UV-531用量为1.0%时,纸张的抗张指数及耐折度最好,分别为50.7N·m/g和76次,相比于原纸分别提高67.9%和61次,白度损失降低9.16%。
A series of aqueous polyurethane emulsions with UV absorption properties(UVWPU)were successfully prepared by introducing self-made 2-hydroxy-4-octyloxybenzophenone(UV-531)as an anti-UV modifier of aqueous polyurethane.The structure and properties of the modified aqueous polyurethane were characterized by TH NMR,FT-IR,DLS,UV-Vis.The UVWPU was applied to the surface of the paper to investigate its surface sizing performance.1H NMR and FT-IR analysis showed that UV-531 was successfully introduced into the UVWPU molecular chain.When w(UV-531)=2.0%(mass fraction),UVWPU particle size was 54.89 nm,UV absorbance was 0.48,increased by 585.7%compared with pure waterborne polyurethane.UVWPU had good surface sizing performance.When w(UV-531)=1.0%(mass fraction),the maximum tensile index and folding endurance of sized paper could reach 50.7 N·m/g and 76 times respectively,and the whiteness loss could be reduced by 9.16%.
作者
赵艳娜
林磊
牛育华
宋洁
张星星
ZHAO Yanna;LIN Lei;NIU Yuhua;SONG Jie;ZHANG Xingxing(Key Lab of Aid Chemistry&Technology for Light Chemical Industry,Ministry cf Education,Shaanxi University of Science and Technology,Xi'an,Shaanxi Province,710021)
出处
《中国造纸》
CAS
北大核心
2019年第9期1-7,共7页
China Pulp & Paper
基金
陕西省教育厅重点实验室研究项目(17JS011)
陕西省农业科技创新项目(NYKJ-2017-01)
陕西省科技计划项目(2018ZDXM-NY-059)
关键词
紫外吸收
改性水性聚氨酯
施胶剂
耐水性
抗老化
ultraviolet absorption
modified waterborne polyurethane
sizing agent
water resistance
anti-aging
