Fabrication of sodium lignosulfonate/waterborne polyurethane composites with high biological content to enhance mechanical properties and UV resistance

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products Pub Date : 2024-05-09 DOI:10.1016/j.indcrop.2024.118689

Jiawei Li , Chengyu Hong , Ye Han , Jiaqi Zhang , Ruixue Zhai , Chao Zhou

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引用次数: 0

Abstract

The conversion of sodium lignosulfonate (SL) into high-value functional materials remains challenging. Hereon, a bio-based waterborne polyurethane (WPU) was synthesized using castor oil and isophorone diisocyanate as the raw materials. SL was used as a functional filler to prepare transparent or translucent composites of sodium lignosulfonate/waterborne polyurethane with good properties through physical blending method. The influence of varying SL contents on the performance of composite emulsions and films were studied. The results indicated that the composite derived from bio-based materials had an occupancy rate of 89.5 %, and all composite emulsions exhibited outstanding storage stability. Interestingly, the addition of sodium lignosulfonate greatly improved the mechanical properties and heat resistance due to the strong interfacial interaction between WPUs and SL molecular chains. Furthermore, the composite film could achieve complete UV shielding performance when the sodium lignosulfonate content reached 9 wt %. This work had significantly expanded the range of high-value-added applications for lignin and potential prospects for its use in the field of sunscreen coatings.

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制造生物含量高的木质素磺酸钠/水性聚氨酯复合材料，以提高机械性能和抗紫外线能力

将木质素磺酸钠（SL）转化为高价值的功能材料仍具有挑战性。为此，我们以蓖麻油和异佛尔酮二异氰酸酯为原料，合成了一种生物基水性聚氨酯（WPU）。将 SL 用作功能填料，通过物理混合法制备出性能良好的木质素磺酸钠/水性聚氨酯透明或半透明复合材料。研究了不同木质素磺酸钠含量对复合乳液和薄膜性能的影响。结果表明，来自生物基材料的复合材料的占有率为 89.5%，所有复合乳液都表现出出色的储存稳定性。有趣的是，由于 WPU 和 SL 分子链之间的界面相互作用很强，木质素磺酸钠的加入大大提高了机械性能和耐热性。此外，当木质素磺酸钠的含量达到 9 wt % 时，复合薄膜可实现完全的紫外线屏蔽性能。这项工作极大地拓展了木质素的高附加值应用范围，并为其在防晒涂料领域的应用带来了潜在的前景。

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来源期刊

Industrial Crops and Products 农林科学-农业工程

CiteScore

9.50

自引率

8.50%

发文量

1518

审稿时长

43 days

期刊介绍： Industrial Crops and Products is an International Journal publishing academic and industrial research on industrial (defined as non-food/non-feed) crops and products. Papers concern both crop-oriented and bio-based materials from crops-oriented research, and should be of interest to an international audience, hypothesis driven, and where comparisons are made statistics performed.