Study on the improvement of water vapor permeability and moisture absorption of microfiber synthetic leather base by collagen

Abstract

The microfiber synthetic leather base pretreated by sulfuric acid was modified by collagen in which the organic phosphine FP was used as a cross-linking agent, for the purpose of increasing the active groups and improving its properties. Compared with the pretreated base, it was found that the amino content in the modified base was two times and the carboxyl content was three times. The water vapor permeability of the modified base increased by 65% and the moisture absorption increased by 181%. It was further found that the tensile strength of the modified base was 19.06 N/mm2, the elongation at break was 54% and the tear strength was 112.34 N/mm. The test results of Fourier transform infrared spectroscopy, scanning electron microscopy, atomic force microscopy, thermogravimetric analysis and water contact angle showed that the collagen molecules had evenly cross-linked with fiber. The modified base microfiber dispersion was greatly increased, the hydrophility was enhanced and the relative average roughness was decreased. Moreover, modification by collagen also affected the thermal properties of the base.

Study on the effect of the sanitary properties of microfiber synthetic leather base by using a filling agent

“…The roughness of the base surface could be characterized by the relative average roughness of the fiber surface. 20 As shown in Figure 6, the surface of the blank base was relatively flat and its surface roughness was 38.49 nm. The relative average roughness of the base after being filled increased to 39.09, 145.6 and 61.64 nm, respectively.…”

Micro/nano microfiber synthetic leather base with different nanofiber diameters

“…However, there are few active groups in PET, resulting in poor absorption and transfer of water molecules by fibers, and thus MSLB is less hydrophilic. Consequently, microfiber synthetic leather has a poorer hygienic performance than natural leather, such as poor static water vapor transmission (WVT) rate, hygroscopicity and poor wearing comfort [5]. Therefore, it is indispensable to ameliorate the hygienic performance of microfiber synthetic leather.…”

Improving hygiene performance of microfiber synthetic leather base by mixing polyhydroxybutyrate nanofiber

“…[6][7][8][9] At present, many researchers concentrate on improving the hygienic properties of leather base. 10 Typically, acid hydrolysis, [11][12][13] proteolytic hydrolysis, [14][15][16] and graft hydrophilic materials [17][18][19][20][21][22] (especially collagen) 23,24 are used to modify the MSLB. However, previous studies primarily focused on polyamide modification, and the process was complicated.…”