松香基荧光水性聚氨酯的制备及性能

doi:10.16085/j.issn.1000-6613.2022-0112

摘要/Abstract

摘要：

以异佛尔酮二异氰酸酯（IPDI）、丙烯酸松香加成物与甲基丙烯酸2-羟乙酯酯化物（RAG）为原料，二羟甲基丙酸（DMPA）为亲水扩链剂，5,7-二羟基-4-甲基香豆素（DHMC）为荧光扩链剂，成功制备了稳定性好的松香基荧光水性聚氨酯乳液（FWPU）。采用核磁共振氢谱、红外光谱、紫外光谱等对FWPU进行了结构表征，探讨了DHMC用量、猝灭剂1,4-对苯二酚（HQ）对FWPU荧光性能的影响，测试了聚氨酯膜的紫外防护性能。结果表明，DHMC成功接枝到聚氨酯主链上，随着其用量的增加，FWPU的荧光强度逐渐增大，用量为1%时荧光强度最大（达5002）；相比于DHMC，FWPU的荧光强度明显增大；HQ对FWPU荧光猝灭效果明显。加入DHMC，聚氨酯的紫外线防护系数从6.86增加到12.27，紫外防护性能得到改善，耐水性也有一定的提高。

关键词: 松香酯化物, 水性聚氨酯, 荧光强度, 紫外防护性能

Abstract:

Rosin-based fluorescent waterborne polyurethane emulsion (FWPU) with good stability was successfully prepared using isophorone diisocyanate (IPDI), ester (RAG) of acrylic rosin adduct and 2-hydroxyethyl methacrylate as raw materials, dihydroxymethyl propyl acid (DMPA) as hydrophilic chain extender and 5,7-dihydroxy-4-methyl coumarin (DHMC) as fluorescent chain extender. The structure of FWPU was characterized by ¹H NMR, Infrared spectrum and UV-visible spectroscopy, and the effects of the amount of DHMC and quenching agent 1,4-hydroquinone (HQ) on the fluorescence performance of FWPU were discussed. The UV protection performance (UPF) of polyurethane film was tested. The results showed that DHMC was successfully linked onto the polyurethane main chain. With the increase of the dosage of DHMC, the fluorescence intensity of FWPU increased gradually, and the maximum fluorescence intensity was 5002 when the dosage was 1%. Compared with DHMC, the fluorescence intensity of FWPU increased significantly. The fluorescence quenching effect of HQ on FWPU was obvious. With the addition of DHMC, the UPF value of polyurethane increased from 6.86 to 12.27, and the UV protection performance was improved as well as the water resistance.

Key words: rosin ester, waterborne polyurethane, fluorescent intensity, UV protection performance

中图分类号:

TQ323.8

严成飞, 余彩莉, 张发爱. 松香基荧光水性聚氨酯的制备及性能[J]. 化工进展, 2022, 41(11): 6061-6067.

YAN Chengfei, YU Caili, ZHANG Fa’ai. Preparation and properties of rosin based fluorescent waterborne polyurethane[J]. Chemical Industry and Engineering Progress, 2022, 41(11): 6061-6067.

图/表 10

图1 FWPU乳液的合成路线

图2 DHMC和FWPU的1H NMR光谱图

图3 DHMC和FWPU的红外光谱图

图4 DHMC和不同DHMC用量的FWPU的紫外光谱图

图5 不同DHMC用量的FWPU粒径分布和乳液外观a1~a6分别为FWPU0、FWPU0.2、FWPU0.4、FWPU0.6、FWPU0.8、FWPU1.0；b1~b2分别为FWPU0、FWPU0.2、FWPU0.4、FWPU0.6、FWPU0.8、FWPU1.0

图6 不同DHMC用量的FWPU的荧光光谱图

图7 不同对苯二酚浓度下的FWPU荧光光谱图

图8 I0/I随HQ浓度的变化

图9 不同DHMC质量分数的FWPU薄膜的静态水接触角和吸水率

表1 FWPU的UPF、T(UVA)、T(UVB)

样品	UPF	T（UVA）/%	T（UVB）/%
FWPU0	6.86	15.29	12.34
FWPU0.2	10.85	9.03	9.52
FWPU0.4	11.08	8.90	9.20
FWPU0.6	11.51	8.58	8.65
FWPU0.8	12.23	8.00	8.51
FWPU1.0	12.27	7.74	7.99

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