Design, characterization, dyeing properties, and application of acid-dyeable polyurethane in the manufacture of microfiber synthetic leather

Abstract

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.

Treatment of microfiber alkali weight‐reduction wastewater with high salt concentration by Fenton oxidation and bacterial degradation

“…Over the past decades, the use of microfibre synthetic leather had attracted the attention of a growing number of people to study its property (Liu et al , 2015) because of its unique characteristics (lightquality, waterproof, fluffy, etc.) (Qiang et al ., 2010) in anthropogenic activities, as exemplified by sports shoes, bags, sofas, sports goods.…”

Evaluation of the Chemical Composition of Synthetic Leather Using Spectroscopy Techniques

“…In addition, consumer concern with animals and increasing environmental awareness have led to the development of an alternative material, namely, synthetic or artificial leather. 2–5…”

“…6 Synthetic leather has applications in the manufacture of footwear, garments, bags, furniture, upholsteries, clothing, appliances, electronic accessories, etc. 4,7…”

“…In addition, consumer concern with animals and increasing environmental awareness have led to the development of an alternative material, namely, synthetic or artificial leather. [2][3][4][5] Synthetic leather usually consists of a base textile (a knitted fabric, woven or nonwoven), and a polymer is applied to the fabric in the form of a lacquer or emulsion. 2 The most commonly used polymer is polyurethane (PU), 2,3 but polyvinyl chloride (PVC) and polypropylene can be also used.…”

Pengaruh pemlastis dioktil ftalat terhadap sifat fisis dan mekanis kulit sintetis

“…Pembuatan kulit sintetis dapat menggunakan bahan baku polimer beragam, antara lain PVC (Musthofa et al, 1997), PU, poliamida (Liu et al, 2015;Qiang et al, 2017;Roh et al, 2013), akrilik, atau polyester (Ho, 2015). Basis polimer perlu ditambahkan bahan pembantu seperti pemlastis, penstabil, bahan pengisi, pigmen serta bahan penguat untuk mendapatkan kulit sintetis dengan sifat fisis dan mekanis yang diinginkan.…”