Improvement of the Sanitary Property of Microfiber Synthetic Leather Base by PAMAM

Ren, Longfang; Wang, Na; Sun, Song; Tang, Qiang; Wang, Xuechuan

doi:10.1177/155892501501000205

Cited by 4 publications

(3 citation statements)

References 15 publications

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“…The polyamide fiber is a kind of synthetic fiber with the molecular chain composed of the repeated amide group (CONH) as well as −COOH and −NH 2 at the end of the molecular chain . Compared with cotton, the polyamide fiber nonwoven material has poor moisture absorption performance and stuffiness. − Collagen with many hydrophilic groups modified on polyamide fiber nonwoven materials can effectively improve moisture permeability. − Based on the morphological characteristics of microspheres, the leather waste collagen in the form of microspheres was modified on the polyamide fiber nonwoven material, which can not only keep collagen off the original voids on the material but also greatly improve moisture permeability.…”

Section: Introductionmentioning

confidence: 99%

Construction of Collagen Methacrylamide Microspheres to Modify Nonwoven Polyamide Fibers Based on Click Chemistry

Xu¹,

Xing²,

Wang³

2021

ACS Appl. Polym. Mater.

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Using waste leather collagen, collagen microspheres with “–CHCH2” (CMAs) were prepared using the emulsification cross-linking method and then incorporated into a nonwoven polyamide fiber material with the “thiol–ene” click chemistry method to obtain modified nonwoven polyamide fibers (PA-CMAs). Experiments showed that for a CMA concentration of 6 wt %, initiator concentration of 0.008 wt %, and irradiation time of 5 h, the grafting rate can reach 25.83%. Scanning electron microscope (SEM) and X-ray photoelectron spectrometer (XPS) are used to confirm the successful grafting of CMAs onto nonwoven PA materials. The stability and fastness test was used to show that PA-CMAs have good stability with acid, alkali, organic solvent resistance, and rubbing resistance. The contrast test indicated that the moisture absorption and permeability of PA-CMAs were better than those of nonwoven polyamide/polyurethane (PA/PU), which is a synthetic leather-based material considered as one of the mainstream products. In addition, PA-CMAs maintained the original softness and elastoplasticity of PA.

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Section: Introductionmentioning

confidence: 99%

Construction of Collagen Methacrylamide Microspheres to Modify Nonwoven Polyamide Fibers Based on Click Chemistry

Xu¹,

Xing²,

Wang³

2021

ACS Appl. Polym. Mater.

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“…A series of studies − have been carried out to improve the moisture permeability of microfiber synthetic leather substrates, but the studies have focused mainly on modifying the surface of polyamide fibers by introducing a large number of hydrophilic groups to improve the moisture absorption and permeability of the substrates. However, a few studies have been reported on modifications or substitution studies around polyurethane fillers.…”

Section: Introductionmentioning

confidence: 99%

Construction of a Novel Substrate of Unfigured Islands-in-Sea Microfiber Synthetic Leather Based on Waste Collagen

Tao

Wang

et al. 2021

ACS Omega

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This study is to introduce waste collagen into an unfigured islands-in-sea microfiber nonwoven material, replacing the polyurethane impregnation section of the traditional manufacturing process with the collagen impregnation process. The modified collagen was first impregnated in polyamide/lowdensity polyethylene (PA/LDPE) fiber nonwoven to form a film. Then the low-density polyethylene component was extracted and dissolved in toluene, resulting in a collagen-based microfiber nonwoven substrate. Waste collagen was first modified to introduce CC into the molecular chain to obtain vinyl collagen (CMA), and then the following film formation conditions for CMA were studied: 73% degree of substitution (DS), 3 h cross-linking time, and 0.005−0.01 wt % initiator concentration. Then, the preparation of CMA-PA/LDPE and toluene extraction processes were investigated. The optimum toluene extraction conditions were obtained as an extraction temperature of 85 °C and an extraction time of 110 min. The properties of the nonwoven materials were compared before (CMA-PA/LDPE) and after (PA-CMA) extraction. It was found that the homogeneity, tensile strength, and static moisture permeability of the PA-CMA materials prepared by CMA with 50 and 73% DS were all superior to those of PA/ LDPE. In particular, the static moisture permeability of PA-CMA (691.6 mg/10 cm 2 •24 h) increased by 36.2% compared to the microfiber synthetic leather substrate currently in the market. Using scanning electron microscopy (SEM), the continuity of a film of PA-CMA with 73% DS was observed to be better and the fibers were differentiated and relatively tighter fiber-to-fiber gap. The studied novel green process can eliminate the large amount of dimethylformamide (DMF) pollution caused by the current solventbased polyurethane impregnation process.

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“…Up to now, many modifications, including acid hydrolysis, 2 enzyme hydrolysis, 3 hydrophilic polymer blending 4 and grafting, 1,5–8 have been applied to increase the active groups of microfiber in the MSLB. Among these methods, the effect of hydrolysis was proved to be the weakest and the WVT was improved by 32% compared with the untreated MSLB.…”

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confidence: 99%

Preparation of high-performance microfiber synthetic leather base using thermoplastic polyurethane/sulfonated polysulfone electrospun nanofibers

Zhao

Qian

Fan

et al. 2018

Textile Research Journal

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Compared to natural leather, microfiber synthetic leather has many excellent qualities, such as chemical resistance and physical and mechanical properties. However, preparation of microfiber synthetic leather with a high water vapor transmission rate (WVT), moisture absorption and wearing comfort property is still a challenge. In this study, we prepared thermoplastic polyurethane (TPU)/sulfonated polysulfone (SPSf) electrospun nanofibers and applied them to a microfiber synthetic leather base (MSLB). The effects of TPU/SPSf nanofiber content on the structure and properties of the MSLB were investigated. The results indicated that the TPU/SPSf nanofibers with an average diameter of 0.12 µm were well distributed at all directions in the MSLB. Differential scanning calorimetry analysis showed four Tg peaks, further demonstrating the existence of TPU/SPSf nanofibers. With the increase of TPU/SPSf nanofiber content from 0 to 30 wt%, the contact angles decreased gradually from 111.64° to 67.07°, leading to 55.19% improvement in the WVT value (from 2868.96 to 4452.24 g/(m2•24 h)) and 26.25% improvement in the moisture absorption (from 628.70% to 793.75% mm/s). Simultaneously, when the nanofiber content was 30 wt%, the nanofibers tended to bundle and 6.79% decrement of air permeability was observed. Specifically, the softness of the MSLB was improved by 88.55%. Moreover, the thermal stability and the tear strength were also obviously enhanced. Consequently, this research provided a feasible and promising way to prepare a high-performance MSLB using TPU/SPSf nanofibers.

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Improvement of the Sanitary Property of Microfiber Synthetic Leather Base by PAMAM

Cited by 4 publications

References 15 publications

Construction of Collagen Methacrylamide Microspheres to Modify Nonwoven Polyamide Fibers Based on Click Chemistry

Construction of Collagen Methacrylamide Microspheres to Modify Nonwoven Polyamide Fibers Based on Click Chemistry

Construction of a Novel Substrate of Unfigured Islands-in-Sea Microfiber Synthetic Leather Based on Waste Collagen

Preparation of high-performance microfiber synthetic leather base using thermoplastic polyurethane/sulfonated polysulfone electrospun nanofibers

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