TEXTILE RESEARCH JOURNAL
·
2020
·
IF 1.926
Chen Li,Lijie Wang,Hong Xu,Jinxiang Dong
The builder is an important ingredient in detergents. Sodium oxalate is a good non-phosphate detergent builder, which has good calcium-removing properties and good wash performance in detergents. However, sodium oxalate-based detergent formulations face a tricky problem of “incrustation” on fabrics due to calcium oxalate deposition. If sodium oxalate is used in commercial detergents, then “incrustation” must be solved. In this study, we examined the effect of fabric type, anionic surfactant, polymer, and temperature on incrustation and soil redeposition (“secondary” washing effect) of a sodium oxalate-based detergent. The results showed that both the anionic surfactant and polymer influenced the deposition of calcium oxalate on fabrics. Overall, the amount of calcium oxalate deposition followed the order polyamide < polyester < cotton with the same formulation. Finally, good secondary washing effects (low ash deposition and high whiteness retention) formulations were selected by cumulative washing. The formulation of methyl ester sulfonate (MES)-sodium carboxymethyl cellulose (CMC), MES-polyvinyl pyrrolidone, and alcohol ether sulfate (AES)-CMC had better secondary effects, and the optimal combination of the 12 formulations was AES-CMC.
研究领域:
材料科学
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表面化学
·
纺织工程
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DOI
高影响因子
ENERGY & FUELS
·
2017
·
IF 3.091
Zhitao Han,Shaolong Yang,Xinxiang Pan,Dongsheng Zhao,Jingqi Yu,Yutang Zhou,Pengfei Xia,Dekang Zheng,Yonghui Song,Zhijun Yan
Both cyclic and noncyclic scrubbing experiments were conducted to remove NO from simulated flue gas in a lab-scale countercurrent spraying reactor. The effects of various operating parameters (initial solution pH, NaClO concentration, absorbent temperature, and inlet NO and SO2 concentrations) on NO removal efficiencies were investigated in the noncyclic scrubbing mode. The results showed that NO removal efficiency increased greatly with the decrease of the initial pH value. However, there was a drop in NO removal efficiency, possibly due to the NO2 absorption in the gas phase. NO removal efficiency increased gradually with the increase of the NaClO concentration. Complete removal of NO was achieved when the NaClO concentration was 24 × 10–3 mol·L–1. However, the NO removal efficiency obviously decreased with the absorbent temperature increasing from 303 to 343 K. This could be mainly ascribed to the decrease of the water solubility of NO2 and the absorption reaction of NO2 with water vapor. Furthermore, NO removal efficiency increased quickly with the increase of the inlet NO concentration. The coexisting SO2 in the simulated flue gas had little effect on the NO removal efficiency. Both NO and SO2 could be removed simultaneously with a SO2 removal efficiency of 100% and a NO removal efficiency of >93%. More importantly, the results of cyclic scrubbing experiments indicated that an average NO removal efficiency of 74% had been obtained for the whole cyclic scrubbing duration. The utilization of NaClO oxidant was calculated to be approximately 83%. The ion chromatographic analysis showed that there was no ON2– in the spent liquor. The results demonstrate that NaClO is a low-cost high-efficiency oxidant for NO removal from exhaust gas and that it has great potential for industrial applications.
研究领域:
环境工程
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大气污染控制
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化学工程
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环境化学
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工业废气处理
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DOI
高影响因子
Applied Sciences-Basel
·
2021
·Vol. 12
·期 1
·150
·
IF 2.679
Wei Zhang,Jintao Wu,Jing Xiao,Mingyao Zhu,Haichuan Yang
Protease is the main enzyme of detergent. Through the combination of different proteases and the combination of protease and detergent additives, it can adapt to different washing conditions to improve the washing effect. In this experiment, whiteness determination, microscope scanning, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy were used to detect the whiteness values of the cloth pieces before and after washing, as well as the stain residue between the fibers on the surface of the cloth pieces. The protease detergent formula with better decontamination and anti-deposition effects was selected. The combination of alkaline protease, keratinase, and trypsin was cost-effective in removing stains. Polyacrylamide gel electrophoresis showed that the molecular weight of the protein significantly changed after adding the enzyme preparation during washing, and the molecular weight of the protein was directly proportional to protein redeposition. The composite protease had a better comprehensive decontamination effect, and when compatible with suitable surfactants, anti-redeposition agents, and water-softening agents, the compound protease detergent exhibited a stronger decontamination ability than commercial detergents.Keywords:protease;detergent;surfactant;cleaning
研究领域:
化学
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材料科学
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环境科学
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产品关联
DOI
高影响因子
Journal of Environmental Sciences
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2022
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IF 6.796
Peng Lu,Xianhui Yan,Lyumeng Ye,Dingsheng Chen,Dongyao Chen,Jianhang Huang,Chaoping Cen
The co-removal of CO 2 while removing SO 2 and NO x from industrial flue gas has great potential of carbon emission reduction but related research is lacking. In this study, a wet scrubbing process with various urea solutions for desulfurization and denitrification was explored for the possibility of CO 2 absorption. The results showed that the urea-additive solutions were efficient for NO x and SO 2 abatement, but delivered < 10% CO 2 absorption efficiency. The addition of Ca(OH) 2 dramatically enhanced the CO 2 absorption, remained the desulfurization efficiency, unfortunately restricted the denitrification efficiency. Among various operating parameters, pH of solution played a determining role during the absorption. The contradictory pH demands of CO 2 absorption and denitrification were observed and discussed in detail. A higher pH of solution than 10 was favorable for CO 2 absorption, while the oxidizing of NO to NO 2 , NO 2 − or NO 3 − by NaClO 2 was inhibited in this condition. When 7 < pH < 10, it was favorable for the conversion and absorption of NO and NO x . However, the conversion of HCO 3 − to CO 3 2− was significantly inhibited, hence preventing the absorption of CO 2 . Large part of Ca(OH) 2 became CaCO 3 with a finer particle size, which covered the unreacted Ca(OH) 2 surface after the reaction. Kinetic analysis showed that the CO 2 absorption in urea-NaClO 2 -Ca(OH) 2 absorbent was controlled by chemical reaction in early stage, then by ash layer diffusion in later stage.
研究领域:
环境科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2022
·
IF 4.326
Junqi Cheng,Zhitao Han,Jiawei Li,Xinxiang Pan
Previous work proposed a one-stage wet scrubbing in situ combined with O3 oxidation for simultaneous removal of NO and SO2 from flue gas, and the results showed that wet scrubbing combined in situ with O3 injection could effectively improve O3 oxidant utilization efficiency. In this work, a follow-up research work was carried out to further explore the synergistic effect of dual oxidants of NaClO in the liquid phase and O3 in gas phase. The synergistic effects of O3/NO molar ratio and NaClO concentration in the circulating scrubbing solution on NOx removal performance was investigated systematically. The results showed that when molar ratio of O3/NO was 0.5 and NaClO concentration was 25 mM, NO could be oxidized completely and averaged NOx removal efficiency exceeded 70%. NOx concentrations in outlet gas and anion compositions in the scrubbed solution were analyzed, and the possible reaction paths of wet scrubbing NaClO solution in situ with O3 injection in denitration process were also discussed. When the solution pH was around 6, a relative balance between NOx oxidation and absorption might be achieved, resulting in a high NOx removal efficiency. The temperature of inlet flue gas imposed little impact on NOx removal efficiency due to the quick and efficient cooling effect by wet scrubbing. The increase of initial SO2 concentration led to a slight increase of NOx removal efficiency from 70 to 73.5%. A complete removal of SO2 could be achieved, but coexisting SO2 in flue gas would consume NaClO oxidant and shorten the reaction duration.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
Surfaces and Interfaces
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2021
·
IF 4.837
Zhihua Zhu,Jianle Wang,Xueqiang Liu,Le Yuan,Xueming Liu,Hong Deng
The soil washing technology of heavy metals in soil has the prospect of practical application. In this study, we screening out the best washing conditions for remediation of heavy metal contaminated soil and the conclusions are verified by pilot-scale field tests. Compared with citric acid (CA) and ethylene diamine teraacetic acid disodium salt (EDTA), Iron-based compounds (IC) has highest removal rate of heavy metals in soil. Heavy metals are mainly concentrated in soil with small particle size. Comprehensive cost consideration, the best washing concentration is 0.06 mol·L −1 , the best solid liquid ratio is 1:5 and the best washing time is 30 min. CaO can precipitate heavy metals in washing waste liquor by increasing the pH of heavy metals in washing waste liquor, and the best precipitation time is 30 min considering the comprehensive cost. The results of pilot scale experiments show that the IC washing technology was shown to be an effective approach to rapidly reduce the Pb, Zn and As in contaminated soil.
研究领域:
环境科学
·
土壤修复
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DOI
高影响因子
THERMOCHIMICA ACTA
·
2018
·
IF 2.189
Xian-Wei Cheng,Jin-Ping Guan,Xu-Hong Yang,Ren-Cheng Tang
A novel and durable organic-inorganic flame retardant (FR) system for wool fabric was fabricated using natural phytic acid (PA), titanium dioxide (TiO 2 ) nanoparticles and 1,2,3,4-butanetetracarboxylic acid (BTCA). In order to address the diffusion barrier action of wool fiber to the FR agents, an additional exhaustion process was employed ahead of the traditional pad-dry-cure procedure. The flame retardancy, smoke generation, thermal stability, and washing durability of the treated fabrics were discussed. The PA/TiO 2 /BTCA system endowed wool fabric with excellent flame retardancy and washing durability. The treated fabric was still able to self-extinguish after 30 washing cycles. Moreover, the FR system effectively reduced the smoke generation capacity. Thermogravimetry test shows that the FR system altered the thermal decomposition behavior of wool, and the formation of thermal protective intumescent char mainly contributed to the improved flame retardancy, revealing a significant condensed-phase FR mechanism of the treated wool.
研究领域:
纺织科学
·
材料科学
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DOI
高影响因子
CELLULOSE
·
2021
·Vol. 28
·期 9
·5867-5879
·
IF 5.044
Wang Lujie,Wen Xiaodong,Zhang Xujun,Yuan Shuntao,Xu Qingbo,Fu Feiya,Diao Hongyan,Liu Xiangdong
In this article, carboxymethyl chitosan (CMC) and (3-carboxypropyl) trimethylammonium chloride (CPTC) were used as raw materials to prepare an antibacterial cotton fabric with excellent laundering durability. CMC was first anchored to the surface of cotton fiber via esterification between the carboxyl groups of CMC and the hydroxyl groups of the cellulose molecules on the cotton fiber surface, and then the CPTC was linked to the CMC chains via amidation to the amino groups of the grafted CMC chains. The antibacterial tests showed that the bacteriostatic reduction rate (BR) of the finished cotton fabric against S. aureus and E. coli was above 99.9%, and the BR value of modified cotton fabric remained above 99.9% even after 120 laundering cycles. The results of cytotoxicity, vapor transmissibility, and tensile strength of the fabric samples, as well as the evaluation of water absorption and flexibility show that the modified cotton fabrics are safe and comfortable.
研究领域:
材料科学
·
生物学
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DOI
高影响因子
Energies
·
2019
·Vol. 12
·期 15
·2966
·
IF 2.707
Pijian Gong,Xinxue Li
In this study, NaClO2was selected as a denitration oxidant. In order to clarify the mechanism of NaClO2as an oxidation agent for NO removal efficiency, the effects of H+and other factors (NaClO2concentration, temperature, and the other gas) on the NO removal efficiency were investigated. NaClO2showed a promotional ability on NO removal, whose efficiency increased with the increase of NaClO2concentration. One hundred percent removal efficiency of NO could be achieved when the NaClO2concentration was 0.014 mol/L. Furthermore, raising the reaction temperature benefited the removal of NO. The lower the pH, the better the NO removal efficiency. The promoting effect of H+on the NO removal was studied by the Nernst equation, ionic polarization, and the generation of ClO2. Under the optimal conditions, the best removal efficiency of NO was 100%. Based on the experimental results, the reaction mechanism was finally speculated.Keywords:sodium chlorite (NaClO2);wet scrubbing;removal efficiency;NO reaction mechanism
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2021
·Vol. 28
·期 14
·9489-9504
·
IF 5.044
Zhang Song,Zhang Tingting,He Jinxin,Dong Xia
Silver nanoparticles (AgNPs) loaded on the cotton fiber can endow the fiber with good antibacterial activity, but the AgNPs on the surface of cotton fiber will leach out with the increase of washing times, which will not only greatly reduce the antibacterial properties of cotton fiber, but also cause pollution to the environment. In this paper, carboxyl groups were introduced into cotton fiber by three methods, namely selective oxidation, butane tetracarboxylic acid (BTCA) grafting and polyacrylic acid (PAA) adsorption. The silver ions (Ag + ) were adsorbed on the cotton fibers through electrostatic attraction, and after reduction, the AgNPs were loaded onto the cotton fibers, and the AgNP distribution on the fiber and its effect to the washing resistance of AgNPs were studied. The results showed that the carboxyl groups can be introduced onto the cotton fibers by all the three methods, and the reaction only occurred in the amorphous region of the fibers. The selective oxidation and the BTCA grafting can introduce carboxylic groups into the interior of cotton fibers while the PAA adsorption only imports carboxyl groups on the surface of the fiber. As a consequence, AgNPs were formed inside of the cotton fiber when the selective oxidation and the BTCA grafting were employed, while AgNPs can only be loaded on the surface of the fiber by the PAA adsorption method. AgNPs inside of the fiber have high energetic adherence, resulting in silver-cotton fabric nanocomposites with strong slow-release property and long-term antibacterial ability. The fabric nanocomposites prepared by selective oxidation and BTCA grafting exhibited high AgNP retention rate and excellent antibacterial activity even after 80 washing cycles. Graphic abstract
研究领域:
材料科学
·
纺织工程
·
纳米技术
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产品关联
DOI
高影响因子
FIBERS AND POLYMERS
·
2023
·Vol. 24
·期 6
·1963-1973
·
IF 2.5
He Duoduo,Qin Haiming,Qian Liying,Cao Xiuhua,Huang Jun,Li Junrong
The rapid development of wearable electronic raises the requirement of textile electrodes for biosignal acquisition. However, a big concern is the washability of the e-textiles during practical use, especially for the electrocardiogram (ECG) textile electrodes with metal coating on the fabrics. In this study, a conductive cellulosic fabric with high washability was fabricated by simple drop-coating methods. The cellulosic fabric was drop coated with the mixture of silver nanowires (AgNWs) and polyvinyl alcohol (PVA), and further cross-linked with glutaraldehyde (GA) to form a network to hold AgNWs onto the fabric to prevent AgNWs from falling off in washing. Due to the large amount of hydroxyl groups in the cellulose, it is feasible for GA to cross-link cellulose and PVA by reacting between aldehyde groups and hydroxyl groups. The conductive cellulosic fabric with three drop-coating cycles (3-AgNW/CF) showed excellent conductivity and good stability. The electrical resistance of 3-AgNW/CF increased from 0.43 to 7.63 Ω sq −1 after 100 washing hours. The conductive cellulosic fabric was applied in the smart garment as textile electrodes to acquire ECG signals, which could remain basically consistent after 80 washing hours and slightly deformed after 100 washing hours. The antibacterial efficiency of the conductive cellulosic fabric was 99.9% mainly owing to impalement of AgNWs into bacteria. Together with the facile fabrication protocol, the cellulosic textile electrodes with superb washability show great potential of consumer-level applications in ECG wearable electronics. Graphical
研究领域:
材料科学
·
生物医学工程
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DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2020
·
IF 5.977
Haoyue Qin,Yuanqiang Sun,Xin Geng,Keran Zhao,Hongmin Meng,Ran Yang,Lingbo Qu,Zhaohui Li
In this work, a novel bright yellow fluorescent carbon dots (CDs) was synthesized from N-methyl-1,2-phenylenediamine hydrochloride in ethanol solvent through the solvothermal method . The obtained carbon dots had no fluorescence in water, but could specifically light up in the cell which makes the staining process without washing. Interestingly, the imaging process can be performed by simply shaking the culture with the cells for only 1 min, indicating ultrafast and easy to operate fluorescence imaging. Moreover, the carbon dots with abundant amino functional groups had good lysosome targeting properties (the Pearson’s correlation coefficient is 0.92) and could achieve the ultrafast lysosome imaging in cell and zebrafish and monitoring cell apoptosis status. This is the first lysosome targeting carbon dots that allows the combination of a short incubation at the second-level with wash-free process providing great potential for continuous observation lysosome in vivo.
研究领域:
生物医学工程
·
细胞生物学
·
荧光成像
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）