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首页> 外文期刊>Fibers and Polymers >Design, Characterization, Dyeing Properties, and Application of Acid-Dyeable Polyurethane in the Manufacture of Microfiber Synthetic Leather
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Design, Characterization, Dyeing Properties, and Application of Acid-Dyeable Polyurethane in the Manufacture of Microfiber Synthetic Leather

机译：酸洗型聚氨酯的设计，表征，染色性能及其在超细纤维合成革生产中的应用

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摘要

The difficulty in dyeing microfiber synthetic leather filled with ordinary polyurethane presents a significant challenge in maintaining the uniformity and highly realistic appearance of the resulting products. In the present study, a type of acid-dyeable polyurethane (PU-MDEA; MDEA=N-methyldiethanolamine) was synthesized, and its chemical structure and dyeing properties were investigated. Nuclear magnetic resonance analysis indicated that cationic groups were successfully incorporated into the PU-MDEA backbone via chain extension using MDEA. The amorphous nature of PU-MDEA was determined by differential scanning calorimetry, X-ray diffraction, and polarizing optical microscopy. Owing to the strong binding between these cationic groups and acid dye, as well as the reduced resistance to dye penetration, PU-MDEA showed better dyeability toward the acid dyes studied herein when compared with the control sample (microfiber synthetic leather filled with ordinary polyurethane). The adsorption isotherm experiment revealed that the dyeing process conformed to the Langmuir model, thereby indicating that the acid dyes attached to PU-MDEA via strong ionic. bonding rather than van der Waals forces or hydrogen bonding. Additionally, it was found that the wastewater resulting from the dyeing of the microfiber synthetic leather filled with PU-MDEA exhibited environmentally friendly characteristics when compared with that displayed by the control sample (microfiber synthetic leather filled with ordinary polyurethane). Thus, the current results show the potential of PU-MDEA, as a filler, in the manufacture of microfiber synthetic leather to achieve fast dyeing rate, high dye uptake, and good color fastness, thereby improving the uniformity and highly realistic appearance of the resulting products.
机译：很难对填充有普通聚氨酯的超细纤维合成革进行染色，这对保持所得产品的均匀性和高度逼真的外观提出了重大挑战。在本研究中，合成了一种可酸染色的聚氨酯（PU-MDEA; MDEA = N-甲基二乙醇胺），并对其化学结构和染色性能进行了研究。核磁共振分析表明，阳离子基团通过使用MDEA的扩链成功地掺入到PU-MDEA主链中。 PU-MDEA的无定形性质通过差示扫描量热法，X射线衍射和偏振光学显微镜确定。由于这些阳离子基团与酸性染料之间的牢固结合以及降低的抗染料渗透性，与对照样品（填充有普通聚氨酯的超细纤维合成革）相比，PU-MDEA对本文研究的酸性染料具有更好的染色性。 。等温吸附实验表明，染色过程符合Langmuir模型，表明酸性染料通过强离子与PU-MDEA结合。键而不是范德华力或氢键。另外，发现与对照样品（填充有普通聚氨酯的超细纤维合成革）相比，由PU-MDEA填充的超细纤维合成革的染色所产生的废水表现出环境友好的特性。因此，目前的结果表明，PU-MDEA作为填充剂在制造超细纤维合成革中具有实现快速染色速度，高染料吸收率和良好的色牢度的潜力，从而改善所得产品的均匀性和高度逼真的外观产品。

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