Abstract The small molecular volatilized during the leather fogging process will pollute the air environment inside the car and make leather products flammable. In this paper, layered double hydroxide (LDH) was modified by different dosage of oxidized sodium alginate (OSA) via exfoliation-reassembly, and its structure were investigated by XRD and TEM. Then modified Zanthoxylum Bungeanum Maxim Seed Oil/ OSA modified LDH (MZBMSO/OSA-LDH) were obtained by introducing OSA modified LDH (OSA-LDH) into modified Zanthoxylum Bungeanum Maxim Seed Oil (MZBMSO), and used MZBMSO/OSA-LDH in leather fatliquoring process. The effect of the introduction of OSA-LDH on the anti-fogging and flame retardancy of leather was investigated. Compared to the MZBMSO treated leather, MZBMSO/OSA-LDH-0.2 treated leather exhibited remarkable improvement on fogging value of the leather, which was decreased by 45%. Furthermore, the leather treated by MZBMSO/OSA-LDH-0.4 has reduction of length of charring and smoke density around 36.1% and 37.5%, respectively. A potential interaction mechanism demonstrates that under the influence of OSA-LDH, an organic-inorganic interpenetrating network structure formed by leather collagen fibers-fatliquor molecule-LDH layer, which utilized to the steric hindrance and adsorption effect to hinder small molecule migration inside the leather fibers, thereby suppressing the fogging of the leather.

中文翻译：

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海藻酸钠组装层状双氢氧化物及其与皮革防雾性和阻燃性的构效关系

摘要 皮革雾化过程中挥发的小分子会污染车内空气环境，使皮革制品易燃。本文采用不同剂量的氧化海藻酸钠（OSA）通过剥离-重组对层状双氢氧化物（LDH）进行了改性，并通过XRD和TEM研究了其结构。然后将OSA改性LDH（OSA-LDH）引入改性花椒籽油（MZBMSO）中得到改性花椒籽油/OSA改性LDH（MZBMSO/OSA-LDH），并在皮革中使用MZBMSO/OSA-LDH加脂过程。研究了OSA-LDH的引入对皮革防雾和阻燃性能的影响。与 MZBMSO 处理的皮革相比，MZBMSO/OSA-LDH-0。2处理后的皮革对皮革起雾值有显着改善，下降了45%。此外，经MZBMSO/OSA-LDH-0.4处理的皮革炭化长度和烟气密度分别降低约36.1%和37.5%。一种潜在的相互作用机制表明，在OSA-LDH的影响下，皮革胶原纤维-加脂剂分子-LDH层形成有机-无机互穿网络结构，利用空间位阻和吸附作用阻碍小分子在皮革内部迁移纤维，从而抑制皮革起雾。