JOURNAL OF APPLIED POLYMER SCIENCE
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2026
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IF 3.1
Ziqian Xu,Rui Wang,Jianxiong Cheng,Qiang Dou,Linlin Wu
Deep eutectic solvent (DES)-based eutectogels are promising ionotronic materials; however, achieving high mechanical toughness and optical transparency simultaneously remains challenging, as conventional reinforcement strategies typically rely on phase separation that inevitably induces structural opacity. Here, we report a coordination-driven homogeneous eutectogel constructed via copolymerization of hydroxyethyl methacrylate (HEMA) and 1-vinylimidazole (VI) in a ZnCl 2 –acetamide (AcAm) Type IV DES, where ZnCl 2 serves as both solvent component and intrinsic coordination cross-linking precursor, enabling a uniform network without additional metal salts. Strong Zn 2+ –imidazole coordination acts as dynamic cross-linking points within the PHEMA-based network, forming a hybrid structure capable of efficient energy dissipation. At an optimized 30 wt% copolymer content with a HEMA:VI ratio of 6:4, the eutectogel exhibits ultrahigh transparency (> 90%), high tensile strength (6.99 MPa), large elongation at break (1770%), and a toughness of 85.01 MJ m −3 . In contrast, hydrogen-bond-dominated ChCl–AcAm systems show negligible strength (< 0.12 MPa), highlighting the essential role of coordination-mediated reinforcement. Furthermore, abundant coordination and polar interactions endow the eutectogel with robust adhesion. The introduction of BMIMCl ionic liquid further enhances ionic conductivity while preserving mechanical integrity and stable sensing performance. This work demonstrates a coordination-driven strategy for homogeneous eutectogels combining mechanical robustness and optical transparency.
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ORGANIC PROCESS RESEARCH & DEVELOPMENT
·
2025
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IF 3.5
Yong Song,Jinsong Li,Shikang Liu,Bo Jin,Rufang Peng
Although mechanochemical synthesis has gained widespread application, our understanding and enhancement of the control of the reaction need to be improved. In this work, we confirm that the mechanochemical reaction of the active pharmaceutical ingredient dantrolene is controlled by diffusion-controlled kinetics. On this basis, we demonstrate a novel approach to modulate mechanochemical reactivity through a diffusion enhancement strategy mediated by supramolecular interactions. The method employs a highly efficient spiral gas–solid two-phase flow technique, in which urea, an additive that can establish supramolecular interactions with 1-aminohydantoin hydrochloride, is introduced into the reaction system to substantially enhance diffusion, thus facilitating the efficient synthesis of dantrolene. Notably, in this diffusion enhancement process, the weakening of mechanical forces triggers the nucleation and growth of the active substrate to form structurally well-defined eutectic crystals that inhibit the reaction. This strategy reduces the mechanochemical reaction time of dantrolene and its analogs to less than 30 s. In addition, thiourea and acetamide, which are structurally similar to urea, promote the reaction, and their effects correlate with the number of supramolecular sites of action.
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Journal of Cleaner Production
·
2023
·
IF 11.1
Zhiwei Lin,Chunhui Zhang,Yufeng Hu,Peidong Su,Bingxu Quan,Xuezhi Li,Zhao Zhang
Given the characteristics of high turbidity and trace emulsified oil in mine drainage , which leads to the problems of low settling efficiency and poor treatment efficiency in the coagulation/flocculation treatment process, there is an urgent need to develop efficient, economical, and stable flocculants . In this study, a new hybrid flocculant Al-P(AM-DMDAAC-BA) was synthesized by the solution copolymerization method, and its viscosity, molecular weight , and cationic degree were 1492.93 mL/g, 7.44 × 10 6 Da and 16.97%, respectively. The physical and chemical properties of Al-P(AM-DMDAAC-BA) were characterized by Fourier transform infrared spectroscopy (FTIR), Nuclear magnetic resonance ( 1 H and 13 C NMR), Transmission electron microscopy (TEM), X-ray diffraction (XRD), Scanning electron microscopy (SEM), Thermogravimetric (TG), and Zeta potential . SEM, Zeta potential, and laser particle size measurement characterized the properties of flocs. Batch wastewater treatment experiments analyzed the flocculation treatment efficacy. The results of the analysis are as follows. Aluminum hydroxyl complexes were attached to organic polymers via -Al-O-C- bonds. Acrylamide (AM), dimethyl diallyl ammonium chloride (DMDAAC) and butyl acrylate (BA) were linked to each other by Carbon-carbon double bond (-C C-). The aluminum-based complex is dispersed as nano-microspheres in the hybrid flocculant and cross-linked to the organic branched chains. Al-P(AM-DMDAAC-BA) is thermally stable and less susceptible to thermal decomposition . It possesses strong electrical neutralization ability and rapid floc growth ability. It has excellent turbidity removal (reduced to 7.96 ± 1.15 NTU) and emulsified oil removal (reduced to 0.23 ± 0.01 mg/L) performance. The flocculation mechanism is mainly attributed to the electro-neutralization of the hybrid flocculants and the adsorption bridging effect of organic branched chains.
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JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2023
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IF 3.5
Jun Liu,Zhi-Wei He,Ge Bai,Wen-Yao Zhu,Xin Li,Heng-Xue Xie,Hui Wang,Meng-Jie Chang,Jie Yang,Yu-Qing Wang,Zhen-Min Luo
We presented the fabrication of novel water glass-based monolithic aerogel reinforced with the electrospun SiO 2 nanofibers (SNFs) by one-step acid catalysis in alkaline condition under ambient pressure drying (APD). Compared with the powder-like water glass-based aerogel (WAG), integrated monolithic aerogel composited with nanofibers (FWAG) was successfully constructed featured with core/shell fibrous skeleton, low density, high porosity, hydrophobic surface and enhanced mechanical property. The obtained FWAG exhibits compressive elastic modulus of 0.13 MPa for FWAG-3 and a sorption capacity of 11.83 g −1 for CH 2 Cl 2 , as well as good insulator performance used at high temperature of ∼460 °C without obvious damage. The low density, hydrophobicity and excellent insulation property enable the FWAG to be applied as insulator for solar thermal evaporation with a water evaporation rate of 1.35 kg m −2 h −1 and conversion efficiency up to 88.4% at one solar intensity to produce fresh water.
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ACS Applied Energy Materials
·
2023
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IF 6.4
Baojun Wang,Rong Zheng,Weifeng Yang,Chengyi Hou,Qinghong Zhang,Kerui Li,Yaogang Li,Hongzhi Wang
To realize stable aqueous zinc metal batteries that can operate over a wide temperature range, simple introduction of organic solutes into the electrolyte is required. However, common solute additives are poorly soluble in concentrated electrolytes for low-temperature applications. Herein, a strategy of using mixed solute additives is developed based on size-complementary zincophilic molecules with electron-rich groups. In the bulk electrolyte, the high-concentration short-chain acetamide (5 mol kg–1) dominantly regulates the hydrated Zn2+ and the hydrogen-bonding network for suppressing active H2O; at the anode interface, the complementary short-chain acetamide and long-chain silk amino acids form specific-adsorption and pH-buffering layers. Furthermore, the size-complementary zincophilic molecules reconstruct the double electric layer and solid electrolyte interphase to inhibit the side reactions of the Zn anode. Consequently, the zinc metal batteries have excellent cycle life (3400 h), Coulombic efficiency (99.7%), and wide-temperature-range adaptability (−60 to 60 °C), making them attractive candidates for practical applications.
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MOLECULES
·
2023
·Vol. 28
·期 24
·8063
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IF 4.6
Chunyong Zhang,Haoyu Wang,Li Shu,Zhe Li,Jirong Bai,Yinpin Wen,Lin Zhu,Yin Geng,Hengfei Qin
PEDOT-Ag/AgCl is a highly promising material with dual functions of hydrogen evolution reaction (HER) and supercapacitors. In this study, a simple low-temperature stirring and light irradiation method was used to synthesize PEDOT-Ag/AgCl on the surface. Then, PEDOT-Ag/AgCl was analyzed using X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, and transmission electron microscopy. PEDOT-Ag/AgCl reacted in 1 M KOH alkaline electrolyte with an overpotential of 157 mV at 20 mA·cm−2and a Tafel slope of 66.95 mv·dec−1. Owing to the synergistic effect of PEDOT and Ag/AgCl, this material had a small resistance (1.7 Ω) and a large specific capacitance (978 F·g−1at current density of 0.5 A·g−1). The synthesis method can prepare nanostructured PEDOT with uniformly-distributed Ag nanoparticles and rod-shaped AgCl on the surface, which can be used as both HER electrocatalysts and supercapacitor electrodes.
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FOOD CHEMISTRY
·
2023
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IF 8.8
Xinjin Yu,Zhimei Zhao,Xiaoli Yan,Jianhua Xie,Qiang Yu,Yi Chen
Traditional organic solvent extractions of tea saponins have many drawbacks. This study aimed to establish an environment-friendly and efficient technology based on deep eutectic solvents (DESs) to extract tea saponins from Camellia oleifera seed meal. The solvent consisting of choline chloride and methylurea was screened as optimal DES. Under the optimal extraction conditions obtained by response surface methodology, the extraction yield of tea saponins reached 94.36 mg/g, which increased by 27% compared with ethanol extraction, while the extraction time was reduced by 50%. Analysis of UV, FT-IR, and UPLC-Q/TOF-MS indicated tea saponins did not alter during DES extraction. Surface activity and emulsification evaluation showed that extracted tea saponins could reduce interfacial tension at the oil–water interface with excellent foamability and foam stability, and they could form nanoemulsions ( d 32 < 200 nm) with excellent stability. This study provides a suitable approach for the efficient extraction of tea saponins.
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BIOTECHNOLOGY LETTERS
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2022
·Vol. 44
·期 10
·1163-1173
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IF 2.716
Zhang Ke,Pan Tingze,Wang Liuzhu,Wang Hualei,Ren Yuhong,Wei Dongzhi
Purpose We screened nitrilases with significant nitrile hydratase activity to exploit their potential in benzylic amide biosynthesis. We also investigated the factors affecting their hydration activity to support further research on benzylic amide production by nitrilase. Methods A sequence-based screening method using previously reported crucial positions identified to be essential for amide-forming capacity of nitrilase (referred to as “amide-formation hotspots”) as molecular probes to identify putative amide-forming nitrilases. Results Based on the previously reported “amide-formation hotspots,” we identified a nitrilase NitPG from Paraburkholderia graminis DSM 17151 that could produce a significant amount of mandelamide toward mandelonitrile and exhibited general hydration activity toward various benzylic nitriles. The time-course experiment with NitPG demonstrated that amide was also a true reaction product of nitrilase, suggesting that the nitrile catalysis by amide-forming nitrilase could be a post-transition state bifurcation-mediated enzymatic reaction. Further research demonstrated that low temperature, metal ion addition, and specific substrate structure could profoundly improve the amide formation capability of nitrilase. Conclusions NitPG with broad hydration activity is a potential candidate for the enzymatic synthesis of benzylic amides for biotechnological applications. Studying the effect of nitrilase hydration activity could promote our understanding of the factors that influence amide and acid distribution.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Yaqi Zhang,Linli Tan,Na Han,Shiwei Tian,Wei Li,Wei Wang,Yutong Wu,Zhongshun Sun,Xingxiang Zhang
The separation of oil-in-water and water-in-oil emulsions with high efficiency and environmental friendly remains a challenge in the past decade. This work describes a new method to improve the trade-off of the poly(acrylonitrile- co -methyl acrylate) (P(AN-MA))-based membrane for water/oil separation. P(AN-MA) microfiltration (MF) membrane was fabricated via thermally induced phase separation (TIPS) method in this study. Then, some of the –CN groups and –COOCH 3 groups were converted to –COOH groups via hydrolyzing. Finally, the selected wettability was attained by grafting PEI on one side while ZIF-8 was anchored to the other side via self-assembly and in-situ interfacial reaction methods. The ZIF-8/P(AN-MA) hybrid MF membranes are superoleophobic underwater on the PEI side while super-hydrophobic under oil on the ZIF-8 side, which can efficiently and accurately separate oil-in-water and water-in-oil emulsions at a low pressure (0.01 MPa). The separation fluxes of the PEI side were as high as 3053 L/m 2 h and 1035 L/m 2 h respectively, for the surfactant-free mixtures and surfactant-stabilized emulsions. For water-in-oil emulsions, the fluxes were up to 2316 L/m 2 and 878 L/m 2 h on the ZIF-8 side, respectively. The separation efficiency of all the mixtures and emulsions was higher than 97.5 %. Moreover, the Janus membranes showed excellent anti-oil-fouling and anti-water-fouling properties on the two sides of the membranes, as well as remarkable durability during the 10 cycles in oil/water separation. Hence, Janus ZIF-8/P(AN-MA) hybrid MF membranes show potential application prospects in oil/water separation.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Jianhui Jia,Jian-Bo Chen,Jianglong Du,Cheng Lian,Silong Xu,Honglai Liu,Shichun Li,Yu Liu
Strongly hydrogen-bonded compounds such as 1,3,5-triamino-2,4,6‑trinitrobenzene (TATB, an important insensitive high explosive) have excellent stability, but poor solubilities to limit their recrystallization, purification and recycling. In this study, core–shell clusters based on symmetrical tetra- n -alkylammonium [TTA] + are designed to provide an inner cavity to incorporate TATB , and thus the clusters can separate TATB from original hydrogen-bonded networks to increase largely the solubility. Based on this design, deep eutectic solvents (DESs) based on [TTA] + cations are first developed to yield self-assembled core–shell clusters for solubilizing TATB. Ninety-nine DESs based on [TTA] + were prepared by combining with halide ions and hydrogen bond donors, and TATB’s solubility increases with the formation of core–shell clusters. Tetrabutyl ammonium ([TBA] + )-based DES (CS-1) displays excellent dissolution toward TATB. Room-temperature solubility of TATB in CS-1 with 32.88 mg/mL is about 10 times higher than recently reported ionic liquids and approximately 470 times higher than DMSO . Compared to traditional solvents, CS-1 shows economical and high dissolution ability toward TATB. The dissolution mechanism is demonstrated by experimental characterizations and theoretical calculations. After forming Zundel-type complexes between TATB and F - , the complexes as the core are surrounded by [TBA] + as the shell to yield core–shell clusters through self-assembly of electrostatic interaction .
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BUILDING AND ENVIRONMENT
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2022
·
IF 7.093
Xin Jin,Jingchao Yang,Min Li,Gongsheng Huang,Alvin CK. Lai
Thermal energy storage shows great potential for improving the energy performance of building heating systems . Phase-change materials are a promising type of storage medium for building envelopes due to their high storage capacity. However, the low thermal conductivity and easy leakage of the hydrated salts inhibit their practical application. In this study, sodium acetate trihydrate–acetamide/modified expanded graphite was prepared as a novel thermal-stable storage medium for space heating applications. Leakage protection tests showed that modified expanded graphite presented a better compatibility with hydrated salts . The thermal conductivity of the novel composite reached 1.87 W/m∙K, 4.5 times higher than that of the pristine mixture. Moreover, the PCM exhibited a great thermal reliability with a high latent heat of 161.9 kJ/kg and an acceptable supercooling degree of 2.2 °C after cycling. The thermal performance of radiant floor heating systems with different layer structures was evaluated. The heat storage and release of the storage medium were beneficial for reducing the temperature fluctuation and improving the indoor comfort. The operation cost of the system without the storage medium was 73.1% higher than that with the storage medium. This performance enhancement suggests that the novel composite is a competitive candidate for heating applications.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Qiongqiong Wang,Yaxi Tian,Mengyun Chen,Rongfeng Guan,Haibin Yuan
Photocatalytic production H 2 of splitting water is an important branch of the application of photocatalytic materials. In this paper, porous C doped carbon nitride was successfully synthesized by calcining urea and acetamide at high temperature, and then analyzed by various characterization methods. XRD and FT-IR spectra show that the crystal structure of carbon nitride modified by acetamide are similar to bulk carbon nitride. SEM and TEM spectra show that the morphology and structure of carbon nitride and carbon nitride was modified by acetamide, which presents a porous nanosheets structure. XPS and EDS show that the content of carbon element in carbon nitride modified by acetamide increased significantly. The PL spectrum is obviously red shift, and the light absorption range is obviously enlarged, which is consistent with the absorption edge of UV–vis Spectrum. The BET of the optimized sample CN2-6 is 122.79 m 2 g -1 , which is 3.04 times higher than that of bulk carbon nitride CN1 (40.456 m 2 g -1 ). In addition, the hydrogen production of CN2-6 is 13169.04 μmol/g/h under 300 W Xenon lamp, which is 14.95 times more than CN1 (880.82 μmol/g/h) hydrogen production rate. When the light source is a 10 W LED lamp , the apparent quantum efficiency (AQE) of sample CN2-6 reaches the maximum (2.91) under the wavelengths of 430 nm, which is 1.27 times more than CN1 under the same conditions. Meanwhile, prepared samples have excellent stability and durability under visible light.
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