FIBERS AND POLYMERS
·
2019
·Vol. 20
·期 11
·2376-2382
·
IF 1.439
Wu Jinsong,Zhao Hongjuan,Wang Mingyue,Zhi Weiru,Xiong Xiaoqing,Zheng Laijiu
The supercritical carbon dioxide (SC-CO 2 ) dyeing technology is a green dyeing technology, and the usage of natural dye makes SC-CO 2 dyeing technology safer and more environment-friendly. Nevertheless, after using natural dye in SC-CO 2 dyeing, the color depth and fastness of dyed natural fabric are poor. In this study, alkyl and hydroxyalkyl groups were grafted onto alizarin, which is a natural dye, to elevate the color depths and fastness of alizarin-derivative-dyed natural fabric. The results demonstrate that the color depths of alkyl-alizarin-dyed and hydroxyalkyl-alizarin-dyed natural fabrics were increased. This has to do with the increase in the solubilities of alkyl alizarin and hydroxyalkyl alizarin in SC-CO 2 . The hydroxybutyl-alizarin-dyed wool displayed the best color depth (K/S value: 6.44). And the hydroxyalkyl-alizarin-dyed natural fabric showed good washing fastness and rubbing fastness (about 4–5 level), because that hydroxyalkyl alizarin could be linked by a covalent bond to the natural fabric.
研究领域:
纺织科学
·
绿色化学
✓ 已验证
DOI
高影响因子
FIBERS AND POLYMERS
·
2022
·Vol. 23
·期 9
·2638-2647
·
IF 2.347
Xie Yan,Lu Shaofeng,Shi Wenzhao,Wang Haizhu,Wang Kuang
Water-based polyurethane (WPU) provides a number of benefits over typical solvent-based polyurethane. WPU is more environmentally friendly, safe, and reliable. The WPU with polycaprolactone diol/polycarbonate diol (PCL/PCDL) complex soft segment was developed using a prepolymer technique to enhance the color depth of cotton knitted fabrics dyed with reactive dyes. The appearance, particle size, zeta potential, and viscosity of WPU emulsions were analyzed. The chemical structure, thermal stability, phase change performance, and topography of WPU films were characterized by Fourier-transform infrared (FTIR), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and atomic force microscopy (AFM), respectively. The tensile and hydrophilic properties of the WPU films were examined by an electronic universal testing machine and contact angle goniometer, respectively. The K / S value, rubbing fastness, washing fastness, and wearability of finished and unfinished dark cotton knitted fabrics were measured. Simultaneously, the chemical structure and morphology of fabrics were investigated using FTIR and scanning electron microscopy (SEM). The results show the WPU-2 emulsion demonstrated excellent stability, and the WPU-2 film showed superior thermal stability. The K / S value of the dark cotton knitted fabric finished with WPU-2 emulsion (40 g/ l ) increased by 18.58 %, and the wet rubbing color fastness of the resulting fabric was enhanced. The SEM results show a layer of film covered the surface of the finished fabric. In summary, the WPU can provide a new technique for enhancing the color depth of fabrics.
研究领域:
材料科学
·
纺织工程
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of CO2 Utilization
·
2023
·
IF 7.7
Qin Fang,Huanda Zheng,Shengnan Li,Tao Cai,Fuer Zheng,Laijiu Zheng
Large degree of orientation, crystallinity, and high glass transition temperature of aramid make the fibers exhibit ultra-high strength, high modulus, high temperature resistance, acid and alkali resistance, light weight and other excellent properties. However, the resulting poor dyeability and water pollution problems of aramid greatly limits its application in protective areas. An eco-friendly supercritical CO 2 assisted printing strategy for meta-aramid was developed firstly in this study. The effects of treatment temperature, time, pressure and dye concentration on the printing properties were investigated. The obtained results showed that the K/S values of the printed meta-aramid increased with the enhancing of CO 2 temperature, treatment time and CO 2 pressure. Compared to tradition printing, higher color depth can be obtained by supercritical CO 2 assisted printing with 40% sodium carboxymethyl cellulose and 20% guar gum as original paste. The K/S values of the meta-aramid with Cationic Pink X-FG in supercritical CO 2 was 12.18 while that of the samples with Cationic Yellow 5GL was 5.42. Washing and rubbing colorfastness rated above 4 were reached at 180 °C for Cationic Pink X-FG and at 160 °C for Cationic Yellow 5GL in supercritical CO 2 . In addition, up to 99% outline sharpness and acceptable stiffness, air permeability and mechanical properties was obtained, which demonstrated that the meta-aramid fabrics with supercritical assisted printing could better meet the wearability requirements.
研究领域:
纺织科学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Wei Li,Ying Yang,Xiaoqing Xi,Jianyong Feng
Polylactic acid (PLA) fiber is a degradable material with good environmental friendliness for textile applications. However, the main problems of difficult dyeing of PLA fibers were: high crystallinity to the adsorption of dyes, more ester and methyl groups producing non-hydrophilic problems, long chains making dyes difficult to penetrate, and producing a low dyeing rate. Here, we attempted to change the crystallinity of the PLA fiber to a lower degree from hydrophobic to hydrophilicity property variation, destroy the long chain structure to grant more staining sites, and improve the PLA fiber staining depth and the resilience dyeing effect with deep eutectic solvent (DES) treatment and natural dyes. We discovered that a controlled DES treatment process could make PLA fibers less crystallized, help amorphous areas form, and break up long chains, which lead to more dye sites. After DES treatment, the crystallinity decreased from 56.12 to 29.86%, and the instantaneous water contact angle decreased from 108.79 to 64.39°. The DES-treated PLA fabric exhibited a higher K/S value of 15.14 for natural dyes under specific conditions. The fabric, which had remarkable fastness characteristics and wash resistance, could endure frequent laundering and fulfill the demands of everyday use. Moreover, the fabric had good antimicrobial activity against Escherichia coli, Staphylococcus aureus, and Candida albicans and possessed a certain level of biocompatibility with fibroblasts. This DES treatment and natural dye combination method offered a new strategy for improving PLA fabric staining depth and color fastness, making it a promising option for low-carbon environmental protection in the textile industry.
研究领域:
材料科学
·
纺织工程
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Yanlei Hu,Liang Liu,Juan Yu,Zhiguo Wang,Yimin Fan
Natural silk fibers consist of well-organized, sophisticated hierarchical architectures that contribute to the robust mechanical performance and functions of the fibers; thus, the direct extraction of silk nanofibers (SNFs) at a single level is a major challenge. Herein, a novel simple, environmentally friendly, and recyclable route was developed to directly downsize natural silks into SNFs via a green deep eutectic solvent (DES) system assisted by mild mechanical disintegration. SNFs with diameters ranging from 2.3 to 28 nm and lengths of 598 ± 308 nm were isolated at a high yield (over 70%) under optimal DES pretreatment conditions. On the basis of the inherent amphoteric properties of SNFs, the pH sensitivity and reversibility were explored to lighten the weight of SNF dispersions for storage and transport, and furthermore, the double adsorption properties of the SNFs might functionalize them for transparent anticounterfeiting devices. In addition, the nanodispersibility of the SNFs in organic solvents and the subsequent nanofiber-containing composite materials with hydrophobic polymer matrixes provide new prospects for wound dressing and porous scaffold materials in biomedical applications.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2022
·
IF 11.072
Shuai Zhang,Kuanjun Fang,Xiuming Liu,Xiran Qiao,Jinkun Wang,Fuyun Sun
Dye/polymer nanospheres , a new type of colorant , are applied in various applications in printing inks, coatings, textiles and other fields by virtue of its excellent color properties. In this research, we adopted a novel composite dye nanospheres modified with polyethyleneimine , which was further applied to the environmentally friendly dyeing of cotton fabrics. After modification, the cationic polyethyleneimine composite dye nanospheres (PDNP) have homogeneous particle size, better monodispersity and stability in aqueous solution. In addition, the hydrated particle size increased by 10 nm and the zeta potential changed from −30.4 to 40.7 mV after polyethyleneimine modification. Meanwhile, the color depth of cotton fabrics dyed with different colors of PDNPs is 3–5 times of the corresponding dye colored samples. The color fastness and durability of the PDNPs dyed cotton fibers are satisfied for practical applications. The colored PDNPs can directly dye untreated cotton fabrics without adding salt and alkali, implying a simple dyeing process and pollution reduction.
研究领域:
纺织科学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Food Measurement and Characterization
·
2024
·Vol. 18
·期 12
·9752-9765
·
IF 2.9
Li Min,He Shanshan,Li Lulu,Zhuang Jiaying,Wang Hongyu
In this work, an aqueous two-phase system (ATPS) based on a green deep eutectic solvent (DES) and inorganic salt is presented and applied for the simultaneous determination of heterocyclic aromatic amines (HAAs) in the marinating juice via ultra performance liquid chromatography (UPLC). First, six different betaine-based DESs were prepared, and betaine/1,4-butanediol (Bet/Buta) was chosen as the suitable extractant for the ATPS. Their structures were confirmed via Fourier transform infrared (FT-IR) spectroscopy and proton nuclear magnetic resonance ( 1 H-NMR) spectroscopy. Subsequently, the factors influencing the ATPS were systematically investigated, and the optimal extraction parameters were obtained with a trichloroacetic acid concentration of 5% (w/v), 0.2 g of Bet/Buta, 0.6 g of an inorganic salt (K 2 HPO 4 ), an extraction time of 1 min and a centrifugation time of 2 min. Under optimal extraction conditions, good linearities were obtained, with the correlation coefficient ( R ) ≥ 0.9995. The inter- and intraday precisions were 2.4–4.9% and 2.9–5.3%, respectively. The recoveries for the targeted HAAs ranged between 91.6 and 111.9%. The limits of detection (LODs) of 5.0–14.6 ng/g were obtained. In contrast to the frequently used solid-phase extraction (SPE) technique, the developed DES‒ATPS method, which has higher accuracy and better precision, has advantages of simplicity, speed, good environmental friendliness and low cost per sample. Finally, it was utilized to determine the four selected HAAs in actual samples of marinating juice to evaluate its applicability. Analytical GREEnness metric (AGREE), a novel greenness assessment tool, was tested to verify that this work was a relatively green analytical procedure. These findings demonstrate that the green and efficient DES−ATPS composed of the Bet/Buta DES and K 2 HPO 4 shows great potential for extracting and enriching HAAs or other harmful substances from liquid food in pilot or large-scale operations. Graphical abstract
研究领域:
分析化学
·
食品安全
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Food Chemistry-X
·
2024
·
IF 6.5
Xiao-Hua Zhang,Ming-Xuan Li,Shi-Yu Li,Jie Su,Li-Ying Wei,Yan-Ting Yuan,Peng-Hua Shu,Kewen Tang
In this study, an eco-friendly and designable aqueous two-phase system (ATPS) was developed using natural deep eutectic solvents (DES) and short-chain alcohols. The formation mechanism and influence of various factors on phase behavior were investigated. Optimal extraction parameters were determined through single-factor experiments and response surface methodology (RSM): 45 °C temperature, 45 % n -propanol, 40 % DES, and 0.06 mL quercetin working standard solution. Based on the alternating trilinear decomposition assisted multiple curve resolution (ATLD-MCR) algorithm, a calibration model was established for simultaneous and rapid quantitative analysis of flavonoids in Acacia honey, achieving 74.0–86.6 % accuracy and 0.82–2.20 % standard deviation. Moreover, the green chemistry metrics of development method was evaluated using analytical greenness (AGREE) and compared with earlier published methods in the literature. The results indicated that this novel combination strategy of DES-based ATPS with chemometrics conforms to the principles of green chemistry, and is suitable for extracting active components from plants.
研究领域:
分析化学
·
植物化学
·
绿色化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2024
·
IF 6
Zhongxu Li,Ruiguo Cui,Weiwei Liu,Mengshi Wang,Lilang Li,Fengjuan Liu,Bin Du,Lijun Song
The wine-making industry produces a large amount of grape pomace, which is rich in anthocyanins. To avoid wasting these resources, choline chloride: lactic acid (molar ratio of 1:2) (DES-1) was selected as the optimal solvent. The optimal extraction conditions were as follows: temperature 60°C, time 60 min, water content 25%. The anthocyanins yield was 5.73 mg (cyanidin-3-glucoside) equivalent/ g under the optimal conditions, which was significantly higher than that obtained by DES-3 (Choline chloride: 1,4 butanediol), DES-5 (Choline chloride: 1,2 propylene glycol), and ethanol. The DES-1 extract showed significant higher color stability and antioxidant activities compared with the anthocyanins extracted by DES-3, DES-5, and ethanol. A total of eight individual anthocyanin compounds were identified in each extract, with delphinidin 3-O-glucoside, peonidin 3-O- glucoside, petunidin, and delphinidin as the dominant compounds. Molecular dynamics simulation confirmed that DES-1 system showed a larger average number of hydrogen bonds (11.63), average lifetime of hydrogen bonds (364.21 ps) and with a reduced total interaction energy (-706.82 kJ/moL), thus improving the extraction efficiency and stability of anthocyanins. This study would provide new protocols for the extraction of anthocyanins from grape pomace.
研究领域:
食品科学
·
化学工程
·
分子生物学
·
可持续化学
✓ 已验证
DOI
高影响因子
Biomass Conversion and Biorefinery
·
2024
·
IF 3.5
Gong Xiujin,Wang Dengfeng,Zheng Qiannan,Liu Lin,Wu Han,Li Zihan,Hong Haojie,Yao Juming
Lignin extraction and upgrade are the great importance to lignin valorization but are closely related to raw material sources, separation methods, and conditions. The advantage of this work is to firstly exploit an efficient and practical approach to extract highly reactive lignin from waste mulberry branches (MB) using green deep eutectic solvent (DES). To better understand the relationship between the extraction conditions and the properties of lignin, the influences of DES components, extraction temperature and time on the extraction efficiency, average molecular weight, chemical structure, and thermal stability of lignin were systematically investigated and analyzed. The synergistic effects of processing conditions resulted in high extraction efficiency with 62.9% of yield and 94.5% of purity. Under optimal conditions with LA/ChCl ratio of 2:1, extraction temperature of 150 °C, and time of 6 h, the obtained lignin had relatively low molecular weight ( M n = 1900 g/mol and M w = 2841 g/mol) and narrow distribution (PDI = 1.49), simultaneously had high total hydroxyl content of 9.15 mmol/g. Benefiting from high hydroxyl content and low molecular weight, the extracted lignin possessed excellent miscibility and reactivity which could participate in polymerization reaction to synthesize lignin-derived rigid polyurethane foam (LRPUF). The integration of the highly reactive lignin significantly improved the specific compressive strength and modulus of LRPUF to 6.4 and 76.0 MPa/(g/cm 3 ), which increased by 7% and 22.4% than those of petroleum-based RPUF. Therefore, this work not only provided an efficient and practical strategy for lignin extraction and upgrade, but also proposed a potential of high value-added utilization of waste mulberry branches. Graphical Abstract
研究领域:
化学工程
·
材料科学
·
环境科学
·
生物资源技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 45
·17309-17320
·
IF 8.067
Yingxue Wu,Wenxing Jiang,Tianyu Zhao,Jiadong Wang,Xianhong Zhang,Dong Chen,Yuhong Ma,Wantai Yang
Stretchable ionogels have been intensively investigated for the development of flexible and wearable sensors. Integration of excellent mechanical properties, high conductivity, reliable adhesiveness, remarkable self-healing ability, favorable transparency and biocompatibility is highly desired for ionogel-based flexible sensors but is still challenging. Herein, a high-performance flexible sensor based on a well-designed ionogel with excellent comprehensive properties was facilely fabricated via introducing oppositely charged poly(acrylic acid) (PAA) and polyethyleneimine (PEI) into a green deep eutectic solvent (DES) composed of biocompatible choline chloride and urea. Dynamic physically cross-linked networks were efficiently constructed through noncovalent interactions, including PAA/PEI electrostatic interactions and hydrogen bonding interactions between PAA/PEI and DES. The as-prepared PAA/PEI/DES ionogels exhibit well-tailored mechanical properties, high conductivity, desirable transparency, strong adhesiveness and highly efficient self-healing ability simultaneously. More importantly, the assembled ionogel-based sensor possesses excellent sensory capabilities towards strain and temperature, including high sensitivity (gauge factor up to 6), wide sensing range (1–600% strain), short response time and outstanding durability. The fractured sensor could be easily healed at 40 °C and their initial sensing performance can be fully restored. This study offers a promising strategy for fabricating biocompatible, flexible and highly sensitive ionogel-based wearable sensors for a full-range of human motion detection.
研究领域:
材料科学
·
纳米技术
·
可穿戴技术
·
生物医学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）