Journal of Engineered Fibers and Fabrics
·
2015
·
IF 0.986
Chaohong Dong,Zhou Lu,Ping Zhu,Lei Wang,Fengjun Zhang
A novel poly(4-iodobutoxylmethylsiloxane) (PIBMS) water repellent with high reaction activity was synthesized using poly(hydromethylsiloxane) (PHMS), methyl iodide (MeI) and tetrahydrofuran (THF) in the presence of a catalytic amount of PdCl2. The new chemical active group of PIBMS could covalently bond to the cotton fabric. It is conducive to improve the washability of treated cotton fabric. The structure of PIBMS was confirmed by the FT-IR and 1H NMR spectra. The PIBMS was applied onto cotton fabric by a pad-dry-cure process. PIBMS was applied to cotton fabrics and the effect of the process parameters on water repellent performance was studied. The morphology of PIBMS polymer film on the cotton fabric was investigated by SEM. The water repellency of treated cotton fabrics before and after vigorous washes was compared. The results show that the water repellent grade of cotton fabric treated with PIBMS was 90. The contact angle of the treated cotton fabric was 136.94°, which was higher than that of the untreated cotton fabric. The water repellent grade of treated cotton fabric was still as high as 80 after 20 times washing. The tear strength and the tensile strength of cotton fabric significantly increased after PIBMS treatment. The air permeability and the water vapor permeability of treated cotton fabric were slightly lower than those of untreated cotton fabrics.
研究领域:
材料科学
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纺织工程
·
高分子化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 141
·期 9
·e55028
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IF 3
Haowei Huang,Liangliang Wu,Gang Wang,Xianjun Wang,Yunchuan Xie
Safe building structures cannot be achieved without reliable waterproofing engineering. To address the susceptibility of concrete materials to water leakage, a low-viscosity stearic acid emulsion has been developed as a waterproofing agent for mortar. By introducing lauric acid, the formation of stearic acid crystals in water could be effectively prevented, resulting in a stearic acid emulsion with a viscosity of only 24 mPa·s. It is found that the best overall performance was achieved when the ratio (R) of lauric acid to stearic acid was 2/3. This emulsion has the least effect on mortar fluidity and setting time. The as-prepared modified mortar possessed the highest compressive strength (127% of the blank) and the lowest water absorption at 48 h (37% of the blank). X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), energy-dispersive x-ray spectroscopy (EDS), scanning electron microscopy (SEM), dynamic light scattering (DLS) particle size analysis, and water contact angle measurements were used to investigate the mechanism of stearic acid emulsion's modification. It is determined that the stearic acid emulsions successfully modified the internal and external hydrophobicity of the mortar by chemical action with calcium hydroxide.
研究领域:
建筑材料学
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化学工程
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土木工程
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 31
·e54232
·
IF 3
Shangdong Huang,Yeyun Meng,Hongqiang Li,Xingrong Zeng
In recent years, with the increasing consciousness on environment protection, fluorine-free water-repellent agents in textile industry have attracted considerable attention. Herein, we proposed a new strategy to prepare bio-based fluorine-free branched polyurethane@organosilicon water-repellent agent for cotton fabric (CF). Branched polyurethane (BPU) with long alkyl chains was firstly synthesized through the reaction of glycerin monostearate extracted from natural palm fruit, toluene diisocyanate, trimethylopropane and N-methyl diethanolamine, and then utilized to coat the C24-28 olefin modified hydroxyl silicone oil (C24-28 HSO) by emulsification procedure to obtain branched polyurethane@organosilicon (BPU@C24-28 HSO) water-repellent agent. Fourier transform infrared spectroscopy and 1 H nuclear magnetic resonance spectroscopy confirmed the chemical structures of BPU, C24-28 HSO and BPU@C24-28 HSO water-repellent agent. The biomass carbon content of the water-repellent agent reached 54.0%. Transmission electron microscope demonstrated that the BPU@C24-28 HSO water-repellent agent appeared obvious spherical shape with core-shell structure. Owing to the introduction of organosilicon, the water-repellent agent significantly improved the softness of the CF. In addition, the CF finished by the BPU@C24-28 HSO water-repellent agent also exhibited excellent water-repellent score of 90+, high water contact angle of 141.6° and superior surface stability. Our findings provided a direction to prepare environmental-friendly and high-performance water-repellent agents for various fabrics.
研究领域:
材料科学
·
纺织工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Hongkai Guo,Yufa Sun,Kun Chen,Qi Meng,Xiangdong Zhou
As petroleum resources diminish and public environmental consciousness increases, biobased, fluorine-free waterproof agents have become a research hotspot. However, most reported waterproof agents still suffer from poor water resistance and have the drawback of hardening the fabric’s hand feel. To address these issues, silanated castor oil (SiCO) was synthesized by castor oil and trimethoxysilane and used to prepare a series of biobased waterborne polyurethanes (SiCO-WPU). Then, SiCO-WPU was finished on the polyamide fabric using a pad–dry–cure procedure. The finishing process was optimized by using the Minitab software. The water repellency tests showed that when the SiCO content was 19.92%, the water contact angle of the SiCO-WPU film increased from 74.8° to 95.8°, and the treated polyamide fabric achieved a contact angle of 138.5° along with a water repellency rating of level 4. In addition, the treated fabric exhibited an 11% decrease in the sliding friction coefficient and a 20% enhancement in the crease recovery angle. Even after 20 washes, the treated fabric still maintained good water repellency and improved the smooth and elastic hand feel. This work holds significant importance for the design and application of sustainable, fluorine-free waterproofing agents in the textile industry.
研究领域:
材料科学
·
纺织化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Yang Jiang,Chuanli Wang,Meng Liu,Biao Gu,Xiao Wang,Changhai Xu,Guowei Xiao,Dagang Miao,Jinmei Du
In this work, cationic waterborne polyurethane/acrylate (WPUA) was synthesized for water repellent in cotton fabrics to replace fluorine-containing finishing agents with the concerns of ecosystems and human health. First, the tertiary amines monomers, N -methyl diethanolamine, 3-dimethylamine-1, 2-propylene glycol, N , N ′-bis (2-hydroxyethyl)piperazine, were used as chain extenders to prepare waterborne polyurethane, respectively. Long-chain octadecyl acrylate monomers were then grafted to the waterborne polyurethane by a self-emulsifying method. The stable WPUA suspensions of positively charged latexes were obtained and could be finished on cotton fabrics via a simple pad-curing process. The coated cotton fabrics were capable of repelling common liquids without any penetration, and the contact angles of the treated cotton fabrics could reach 150°. The WPUA latex films also exhibited good tensile mechanical properties and thermal dimensional stability. The cotton fabric coated with the WPUA showed good laundering durability, and its static water contact angle was still maintained at 142° even after 50 times washing. This work not only highlights the structural design and preparation but also provides a feasible strategy for fluorine-free water repellency in cotton fabrics, which has great potential application prospects for a variety of fields.
研究领域:
材料科学
·
纺织工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）