POLYMER
·
2023
·
IF 4.6
Cunzhi Li,Xiaobin Li,Ending Zhang,Jun Shi,Chenguang Kong,Jianrong Ren,Hangzhou Wang,Li Yang
Conductive hydrogels have gained significant attention for wearable devices in recent years. However, hydrogel suffers from limitations such as poor stretchability, freezing under cold climates, and drying out in harsh environments, which restrict its practical applications. To address these issues. We synthesize waterborne polyurethane (WPU) and add it to the polyvinyl alcohol (PVA) hydrogel to enhance its mechanical properties. Additionally, DMSO is introduced to the system, aiming to enhance the environmental stability of the hydrogel through its interaction with water. Hence, we prepare a novel organohydrogel by incorporating WPU into PVA in a dimethyl sulfoxide (DMSO)-water (H 2 O) binary solvent system by one-pot method. The addition of DMSO and WPU enhances the mechanical properties of the organohydrogel, resulting in high mechanical strength (1.27 MPa), excellent stretchability (874%), and superior toughness (3.62 MJ/m 3 ). In addition, the organohydrogel presents reliable freeze resistance and water retention properties due to DMSO interaction with water. More significantly, the organohydrogel can be recycled and reshaped into various shapes through a simple process. The reconstructed organohydrogel still has the original's mechanical properties and sensing capabilities and can continue to be used in flexible electronic devices. Moreover, the organohydrogel is developed for flexible multifunctional sensors, exhibiting high sensitivity (G = 1.89), a rapid response time (141 ms), and exceptional fatigue resistance (100 cycles). Notably, the sensor signals remain stable even after storage in extreme conditions. This study expands the working field of flexible hydrogel sensors and provides a new idea for the sustainable development of next-generation flexible hydrogel sensors.
✓ 已验证
产品关联
DOI
高影响因子
Separations
·
2022
·Vol. 9
·期 12
·388
·
IF 3.344
Yulin You,Dongxiao Guo,Weiliang Cui,Zhifan Wang,Chunguo Yang,Yongqiang Lin,Shuqi Wang
Matrix-assisted diffusion-ordered spectroscopy (MA DOSY) technology enables efficient the virtual separation of components in a mixture according to their coefficients (D). In the current research, MA DOSY technology was applied for the analysis of a flavonoid mixture. To establish the method, five representative active flavonoid ingredients, including baicalein, baicalin, quercetin, puerarin and rutinum, were selected for the mixture model. The effects of the type and concentration of the matrix, solvent polarity, and nuclear magnetic resonance (NMR) experimental conditions on the resolution of the DOSY spectrum were investigated. It turned out that sodium dodecyl sulfate (SDS) showed the best performance in increasing the resolution of different analytes, which initially increased to the peak below the added amount of 9 mg, and decreased upon the addition of more SDS. In addition, the five flavonoids showed higher resolution in DMSO–d6than in MeOD. Experimental parameters of DOSY, including the number of scans (NS), dummy scans (DS), and value of the FID data points (TD), were also optimized. Finally, the above optimized method was used for the qualitative analysis of the total flavonoid mixture extracted fromScutellaria baicalensisGeorgi. A total of nine compounds were identified and confirmed by comparing them with mass spectrometry data, which further verifies the practical value of this method upon analyzing flavonoid mixtures and provides some reference significance for the follow-up research.Keywords:NMR;MA-DOSY;flavonoids;mixture separation
研究领域:
分析化学
·
药学
·
天然产物化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICAL CHEMISTRY B
·
2025
·
IF 2.9
Huan Chen,Bona Dai,Lingyun Xu,Hongchun Dong,Mei Wang,Lei Yu,Zihui Qiu,Yue Li,Qi Shi,Jie Shu,Yuan Yuan,Xiaohong Li
Reline, which is composed of choline chloride and urea in a molar ratio of 1:2, is the first and most extensively studied deep eutectic solvent (DES). In certain applications, reline is blended with organic solvents, dimethyl sulfoxide (DMSO) in most cases, to gain improved properties. Therefore, it is crucial to have a profound understanding of the impact of DMSO on the dynamics and structures of the species in the binary mixtures. In this study, neat reline and ten reline/DMSO mixtures, with DMSO molar fraction ranging from 0.1 to 0.95, were investigated primarily through a combined approach utilizing nuclear magnetic resonance (NMR) and Fourier transform infrared (FT-IR) spectroscopic techniques. Based on our investigation, we probed a significant transition of the binary mixtures from large molecule solutions or viscous liquids to nonviscous small-molecule solutions at a DMSO molar fraction of 0.7. Specifically, upon analyzing the self-diffusion coefficient, 1H T1 and 1H T2, we observed a notable increase in the molecular mobility of the species within the reline/DMSO system, particularly when the DMSO molar fraction exceeded 0.7. Drawing upon the FT-IR findings, we suggest that the enhanced molecular mobility, as evidenced by NMR analysis, is correlated with the disruption of molecular hydrogen-bonding interactions involving the −NH2 and −OH groups. Furthermore, based on 1D 1H, 1D 15N, and 2D 1H–1H COSY spectra, it was revealed that the interaction between urea and choline remains relatively stable until the DMSO fraction exceeds 0.7, whereupon it exhibited a notable weakening as the DMSO fraction increases from 0.7 to 0.95. In the meantime, DMSO molecules predominantly engage in hydrogen bond interactions with urea and choline when the DMSO molar fraction exceeds 0.7. Our results align well with previous molecular dynamics (MD) simulation studies and provide profound insights into the significant transition in the reline/DMSO mixture system.
研究领域:
化学
·
物理化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Xilei Yin,Yuanlong Guo,Wene Zhang,Xinjie shen,Hu Cai,Gu Guo,Xuejun Pan,Haibo Xie
Due to the superior nutrient management and biodegradation properties, the biodegradable slow-release fertilizer shows a greater market prospect and environmental protection significance in the chemical fertilizer industry. In this study, a new kind of full bio-based slow-release fertilizers (B-SRFs) encapsulated by walnut wood-based lignocellulose-grafted with poly(ε-caprolactone) (WWL- g -PCL) in the presence of urea was prepared. Considering the multi-hydroxyl structural feature of walnut wood-based lignocellulose , WWL- g -PCLs were synthesized successfully through the ring-opening graft polymerization reaction (ROP) of walnut wood and ε-caprolactone in DBU/DMSO/CO 2 solvent system without adding additional catalyst. The structural and thermal characteristics of WWL- g -PCLs were thoroughly elucidated by nuclear magnetic resonance (NMR), fourier transform infrared spectroscopy (FT-IR), differential scanning calorimeter (DSC) and thermogravimetric analysis (TGA). The results indicated that the WWL- g -PCLs exhibited favorable thermal properties with adjustable glass transition temperature (T g ) from 20.8 to 29.3 °C compared with walnut wood-based lignocellulose, which was beneficial for melt extrusion and granulation to produce B-SRFs. Scanning electron microscope (SEM), static release in water, and tomato fertilization efficiency experiments were conducted to delve into the slow-release mechanism and assess practical application effects. Subsequently, the outstanding slow-release performance of B-SRFs was observed for cumulative nutrient releases of 48–72% within 5 h in water and agreed with the Korsmeyer-Peppas model, indicating its excellent slow-release property. Furthermore, the formulated B-SRFs demonstrated a substantial increase in tomato cumulative biomass, yield, soil organic matter , and fertilizer utilization. Notably, there was a remarkable 57.8% increase in the cumulative biomass of tomatoes. These findings underscore the potential of walnut wood derivatives in developing effective and environmentally friendly slow-release fertilizers with promising agricultural applications.
研究领域:
材料科学
·
农业科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Min Zhou,Guanjun Chen,Ningbo Yu,Zhiwu Liang,Hongxia Gao
DMSO promotes primary/secondary amines and sustains tertiary amine kinetics. • DMSO enhances amine nucleophilicity by restructuring solvation shells and modulating N H interactions. • Destabilized transition states in DMSO lower activation barriers, promoting reaction activity. • Provides molecular insights for designing efficient water-lean CO 2 capture systems. The high energy demand associated with regeneration poses a significant bottleneck for conventional aqueous amine absorbents, rendering the R&D (Research and Development) of water-lean systems crucial for energy-efficient CO 2 capture. This study employs an integrated approach combining stopped-flow apparatus with multi-scale simulations to systematically investigate the intrinsic kinetic behavior of AP, EAE and MDEA in DMSO-H 2 O mixed solvents ([H 2 O]: 0–55 M for AP and EAE, 5–55 M for MDEA). Experimental results revealed distinct solvent-response profiles for the three amines: the intrinsic rate constant k 0 of AP increased monotonically with decreasing water content, peaking in pure DMSO; EAE exhibited a non-monotonic U-shaped trend with a kinetic minimum at 20 M water; whereas MDEA maintained a relatively stable kinetic profile. Molecular dynamics (MD) simulations indicated that DMSO restructures solvation shells to alleviate steric shielding effects and enhanced the electron density of the amine nitrogen, thereby improving local reactivity. Density functional theory (DFT) calculations further corroborated that DMSO lowered reaction activation barriers by destabilizing transition states through the attenuation of hydrogen-bond stabilization. This work elucidates the cooperative regulation mechanism involving DMSO solvent effects and electronic properties, providing a theoretical basis for the rational design of efficient water-lean CO 2 capture systems.
✓ 已验证
DOI
高影响因子
Carbohydrate Polymer Technologies and Applications
·
2021
·
IF 0
Xin Bao,Chunhong Wang,Zhenyu Zhang,Qinghua Cao,Fei Liu,Jing Chen,Chuanzhi Zhang,Haining Na,Jin Zhu
In this article, three kinds of cellulose carbonated derivatives are synthesized by modifying cellulose with alkyl halides (namely bromopropane, benzyl bromide and bromomethyl cyclopropane) in DBU/DMSO/CO2 system. The wet spinnability and filament properties of the obtained cellulose carbonated derivatives are investigated. Through rheological analysis, the solutions of various cellulose carbonated derivative in Newtonian fluid state can show good wet spinnability. Filaments with smooth surface and uniform morphology can be obtained from the solution with viscosity over 0.07Pa•s. The cellulose carbonated derivatives in the filament show similar in tight orderly rows. Among them, the cellulose propyl carbonated derivative filament exhibits the highest mechanical properties and heat resistance. By using of DBU/DMSO/CO2 system, the wet spinning and key control condition of cellulose carbonated derivatives are combined to achieve for the formation of filament with uniform morphology.
研究领域:
材料科学
·
化学工程
·
高分子科学
✓ 已验证
产品关联
DOI
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Ni-Jie Liu,Jun-Yan Yu,Xing-Yu Chen,Li-Fen Liu
Organic solvent ultrafiltration (OSU) membrane as the crucial supporting layer of thin-film composite (TFC) organic solvent nanofiltration (OSN) membrane can help the OSN technology to satisfy the rapidly growing demand for small-molecular separation and purification in organic solvent systems. Aiming at the two main bottlenecks of poor tolerance to strong polar solvents and low solvent flux of the conventional commercial polyimide (PI) ultrafiltration (UF) membrane, in this study, a facile method was proposed to prepare a novel polyimide/polyethyleneimine@TiO2 (PI/PEI@TiO2) OSU membrane with improved solvent resistance and permeability by synchronously coupling the non-solvent-induced phase transformation (NIPs), chemical crosslinking and interfacial in-situ biomineralization. Dut to the chemical crosslinking between PEI and PI, the PI/PEI@TiO2 membrane exhibited good resistance to more organic solvents including the strong polar aprotic solvents (e.g., DMF, NMP and DMSO), ordinary polar solvents (e.g., ethanol) and nonpolar solvents (e.g., n-hexane). At the same time, PEI synchronously catalyzed Ti-BALDH to in-situ generate the TiO2 nanoparticles via interfacial biomineralization, which improved the solvent flux of the PI/PEI@TiO2 membrane due to the creation of more channels and promoted the compatibility of TiO2 within PI/PEI matrix. Especially, the PI/PEI@TiO2-5 membrane with 5 wt% TiO2 loading showed the optimal solvent resistance and high flux in strong polar aprotic solvents (>50 L m−2 h−1·bar −1 in DMF). Therefore, the resultant new PI/PEI@TiO 2 OSU membrane will have a promising separation application in the organic solvent systems in the future.
研究领域:
材料科学
·
化学工程
·
膜技术
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2022
·
IF 13.599
Licheng Lou,Yuancai Gong,Jiazheng Zhou,Jinlin Wang,Xiao Xu,Kang Yin,Biwen Duan,Huijue Wu,Jiangjian Shi,Yanhong Luo,Dongmei Li,Hao Xin,Qingbo Meng
Photo-generated carrier recombination loss at the CZTSSe/CdS front interface is a key issue to the open-circuit voltage ( V OC ) deficit of Cu 2 ZnSnS x Se 4− x (CZTSSe) solar cells. Here, by the aid of an easy-handling spin-coating method, a thin PCBM ([6,6]-phenyl-C61-butyric acid methyl ester) layer as an electron extraction layer has been introduced on the top of CdS buffer layer to modify CZTSSe/CdS/ZnO-ITO (In 2 O 3 :Sn) interfacial properties. Based on Sn 4+ /DMSO (dimethyl sulfoxide) solution system, a total-area efficiency of 12.87% with a V OC of 529 mV has been achieved. A comprehensive investigation on the influence of PCBM layer on carrier extraction, transportation and recombination processes has been carried out. It is found that the PCBM layer can smooth over the CdS film roughness, thus beneficial for a dense and flat window layer. Furthermore, this CZTSSe/CdS/PCBM heterostructure can accelerate carrier separation and extraction and block holes from the front interface as well, which is mainly ascribed to the downward band bending of the absorber and a widened space charge region. Our work provides a feasible way to improve the front interfacial property and the cell performance of CZTSSe solar cells by the aid of organic interfacial materials.
研究领域:
材料科学
·
太阳能
·
光伏技术
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Lidong Wang,Xiaohan Guo,Qingying Ye,Juanjuan Qi,Ping Li,Fei Yan
Dimethyl sulfoxide (DMSO) is a widely used solvent in many industries. The biodegradation of DMSO is difficult, resulting in large amounts volatile and noxious compounds emitted into the atmosphere, including dimethylsulfide, methyl mercaptan, and H2S. Therefore, it is necessary to deal with DMSO-containing wastewater using chemical methods. Here, supported niobia catalysts were prepared and characterized, and their catalytic performances was evaluated by the oxidative degradation of DMSO via H2O2 activation. The product of DMSO oxidation is dimethylsulfone which is a biodegradable and environmentally benign compound. The most active catalyst, 20%Nb2O5/SiO2, can remove 178.6 mmol/L DMSO within 2 h at 25 °C following a pseudo-first-order reaction. EPR spectroscopic studies and scavenging experiments confirms that O2•– and 1O2 are the active species for DMSO degradation. Although the catalytic activity of Nb2O5/SiO2 drops significantly after use, its reusability improved conspicuously after calcination, and the catalyst can be reused for 5 times with an 82.2% DMSO conversion.
研究领域:
环境化学
·
催化
·
废水处理
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2021
·Vol. 23
·期 6
·2352-2361
·
IF 10.182
Yuanlong Guo,Long Li,Gu Guo,Min Pei,Lihua Zhang,Haibo Xie,Hui Sun,Qiang Zheng
Recently, cellulose esters with particular functionality have obtained considerable attention as they can be used in various fields; therefore, the design and facile synthesis of cellulose esters is still a prime subject of research in this area. In this study, a novel cellulose derivative, namely cellulose-3-(2-hydroxyphenyl) propionate ester (CHP), was first prepared using cellulose and 3,4-dihydrocoumarin (DHC) in dimethylsulfoxide (DMSO)/1,8-diazabicyclo[5.4.0]undec-7-ene (DBU)/CO2, a newly developed cellulose solvent system, without adding any external catalyst. The effects of the reaction conditions on the substitution degree (DS), including DHC loading, reaction temperature and time, were systematically investigated, and the CHP with a DS of 2.35 could be prepared when the molar ratio of DHC to anhydroglucose units (AGU) was set at 6/1 at 120 °C in 3 h. The structures and thermal properties of the as-prepared CHP were fully elucidated by nuclear magnetic resonance spectroscopy (NMR), Fourier transform infrared (FT-IR) spectroscopy, differential scanning calorimetry (DSC), and thermal gravimetric analysis (TGA). The ultraviolet (UV) absorption properties and free radical scavenging ability were evaluated by UV-visible absorption spectroscopy and a well-developed 2,2-diphenyl-1-picrylhydrazyl (DPPH)-based colorimetric protocol. The CHPs were identified to have satisfactory UV absorption properties and antioxidant capacity, and the instant DPPH radical scavenging activity reached 68.1% to 100% in 30 min when 40 mM of CHP was applied at 25 °C. Kinetic studies demonstrated that the reaction followed a pseudo-first order reaction kinetic model, and the activation energy (Ea) and Arrhenius frequency factor (A) of CHP-3 to DPPH could be calculated to be 24.24 kJ mol−1 and 2.5918 s−1 by the Arrhenius equation, respectively. The cytotoxicity of the CHPs was also primary evaluated in L929 cells to identify the potential of CHPs for biomedical applications.
研究领域:
材料科学
·
化学
·
生物医学工程
·
高分子科学
✓ 已验证
DOI
高影响因子
GREEN CHEMISTRY
·
2019
·Vol. 22
·期 3
·707-717
·
IF 9.405
Min Pei,Xinwen Peng,Yuqing Shen,Yunlong Yang,Yuanlong Guo,Qiang Zheng,Haibo Xie,Hui Sun
Cellulose esters are important cellulose derivatives with good processing ability and material properties. The design and sustainable synthesis of cellulose esters are prime research topics. Herein, cellulose levulinate esters (CLEs) with degrees of substitution (DSs) ranging from 0.15 to 2.04 were simply prepared through an atom-economic reaction between cellulose dissolved in a newly developed 1.8-diazabicyclo[5.4.0]undec-7-ene/dimethyl sulfoxide/carbon dioxide solvent system and alpha-angelica lactone, a biomass-derived and commercially available platform chemical, without the addition of any external catalysts or condensation reagents. The optimized reaction conditions of 120 °C, 0.5 h, and a 5/1 molar ratio of alpha-angelica lactone to the hydroxyl groups in cellulose resulted in CLEs with appropriate DSs and satisfactory material properties. The structures and thermal properties of the CLEs were characterized by nuclear magnetic resonance spectroscopy, Fourier transform infrared spectroscopy, differential scanning calorimetry, and thermal gravimetric analysis to develop an in-depth understanding of the correlations among the chemical structures, thermal properties, and mechanical properties. A study of solubility in conventional solvents indicated that the CLEs with appropriate DSs were soluble in water, providing a green processing strategy to prepare CLE films with tensile strengths of up to 72 MPa and elongation at break values of up to 26.7%. The morphologies of the films were characterized by scanning electron microscopy and atomic force microscopy. The cytotoxicity of the water-soluble CLEs was also evaluated in vaginal epithelial cells (VK2/E6E7) to identify the potential of the CLEs for biomedical applications.
研究领域:
材料科学
·
化学工程
·
生物医学
✓ 已验证
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2024
·
IF 9.7
Yizhen Zhang,Yu-Cai He,Cuiluan Ma
Lignin is a plentiful and readily accessible renewable resource. Vanillylamine is a crucial raw material used to synthesize pharmaceuticals and high-value furan compounds that can be acquired by aminating lignin-derived vanillin (Van). However, effectually achieving the biocatalytic synthesis of vanillylamine has remained challenging. In this study, a dimethyl sulfoxide (DMSO)-H 2 O (1:9, vol/vol) bioreaction medium was constructed, and a recombinant E. coli ATA1012 carrying ω-transaminase from Caulobacter sp. D5 was used as the ω-transaminase biocatalyst to acquire the effectual biocatalytic synthesis of vanillylamine. Under optimized bioreaction conditions (37 ℃ and pH 7.5) by supplementary of isopropylamine (IPA) (Van/IPA = 1:5, mol/mol), 80–100 mM Van could be effectually converted by ATA1012 whole cells in DMSO-H 2 O (1:9, vol/vol) within 12 h, yielding 91.2 %–95.4 % vanillylamine, with >99 % selectivity. An efficient amination process was developed using ATA1012 with superior transaminase catalytic activity and substrate tolerance to effectively convert Van to vanillylamine in a DMSO-H 2 O medium.
研究领域:
生物技术
·
生物化学
·
有机化学
·
药学
✓ 已验证
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）