JOURNAL OF MOLECULAR LIQUIDS
·
2022
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IF 6.633
Li Hu,Xuze Hu,Zechun Tan,Lan Guo,Jiawen Wu,Jilin Wei,Junsheng Qi,Changjun Zou
Currently, reducing the formation of calcium scale is an important challenge for seawater utilization in the cooling water system of offshore oil and gas platforms. The combination of linear carboxymethyl β-cyclodextrin-epichlorohydrin polymer (L-CM-β-CD-EP) and citric acid-dopamine-epichlorohydrin polymer (CA-DA-EP) as an eco-friendly scale inhibitor was studied by the static experiments. We observed that L-CM-β-CD-EP/CA-DA-EP displayed excellent scale inhibition efficiency of 94.6 % and 92.5 % against CaCO 3 and CaSO 4 , respectively, at the 19.2 mg/L inhibitor (Ca 2+ = C O 3 2 - = 2400 mg/L, Ca 2+ = S O 4 2 - = 800 mg/L). XRD and SEM images of scale crystal exhibited that CaCO 3 and CaSO 4 crystals were deformed and transformed by L-CM-β-CD-EP/CA-DA-EP, which was attributed to multiple inhibition effects, including lattice distortion, chelation, and host–guest synergistic effects. More importantly, the host–guest synergistic effects of L-CM-β-CD-EP and CA-DA-EP can significantly improve the scale inhibition performance of L-CM-β-CD-EP/CA-DA-EP. Besides, the TOC results analysis showed that L-CM-β-CD-EP/CA-DA-EP possessed excellent biodegradability, low bioaccumulation, and ecotoxicity.
研究领域:
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
ACS Applied Materials & Interfaces
·
2014
·
IF 5.9
Jian Hu,Dongliang Wan,Wenguang Zhu,Langhuan Huang,Shaozao Tan,Xiang Cai,Xiuju Zhang
A novel cross-linked quaternized composite anion-exchange membrane based on poly(epichlorohydrin) (PECH) was prepared by a facile route. First, PECH was cross-linked with 2-methylimidazole and combined with a poly(tetrafluoroethylene) (PTFE) membrane to form cross-linked PECH/PTFE (CPECH/PTFE). Then, CPECH/PTFE was quaternized by 1-methylimidazole to obtain cross-linked quaternized PECH/PTFE (CQPECH/PTFE). 1H NMR and Fourier transform infrared spectroscopic data indicated that CQPECH was successfully synthesized, and the CQPECH/PTFE membrane had a dense and homogeneous structure demonstrated by the field-emission scanning electron microscopy. The results showed that the use of 2-methylimidazole as the cross-link agent could avoid the solubility of the composite membrane in water and dimethyl sulfoxide. With an increase of 2-methylimidazole, the solubility of the PECH ionomer was decreased. M-3, one of the CQPECH/PTFE membranes, showed good thermal properties (stable below 250 °C under an N2 atmosphere), excellent mechanical strength (a tensile strength of 67.3 MPa), moderate water uptake of 45.3%, and very low swelling degree of 9.01% at 30 °C. Besides, M-3 showed a hydroxide conductivity of up to 27 mS/cm and good long-term stability in a 1 M KOH solution at 60 °C for 15 days. In addition, a single H2/O2 fuel-cell test using M-3 at 50 °C indicated a peak power density of 23 mW/cm2. These results suggested that the CQPECH/PTFE membrane had a good perspective for application in an alkaline fuel cell.
研究领域:
材料科学
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能源工程
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DOI
PubMed
高影响因子
POLYMER BULLETIN
·
2016
·Vol. 74
·期 3
·625-639
·
IF 1.371
Zhang Jinglin,Liu Huidi,Liu Hongxi,Hu Jian,Tan Shaozao,Wu Ting
Abstract A composite anion exchange membrane of crosslinked quaternized polyepichlorohydrin/polytetrafluoroethylene (CQPECH/PTFE) had been prepared via a green and facile method, where diethylamine, 1-methylimidazole and PTFE, respectively, served as crosslinking agent, quaternization reagent and supporting material. The structure and morphology of CQPECH/PTFE membrane were investigated. Water uptake, swelling ratio, ionic exchange capacity, hydroxide conductivity, chemical stability, and thermal and mechanical properties were measured to evaluate its performance in a direct methanol alkaline fuel cell. The results indicated that CQPECH had penetrated into the pores of PTFE membrane, showing a dense and uniform structure without any pore and phase separation. Besides, CQPECH/PTFE membrane exhibited high ionic conductivity, considerable ionic exchange capacity, moderate water uptake and low swelling ratio. More importantly, the obtained composite membrane displayed high tensile strength and good chemical and thermal stability, suggesting the great potential application of CQPECH/PTFE membrane as anion exchange membrane. Graphical abstract Crosslinked quaternized polyepichlorohydrin/polytetrafluoroethylene composite anion exchange membrane had been prepared via a green and facile method, where diethylamine served as crosslinking agent. With a dense and uniform structure without any pore and phase separation, the obtained composite membrane exhibited high tensile strength and good chemical stability.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
Wentao Wang,Rui Zhang,Jing Bai,Jing Peng,Wu Mang
Large-scale applications of versatile cellulose cryogels have received much concern but remains challenging due to their complicated post-treatment and brittleness nature. A organic solvent-free and mechanical-assisted strategy was proposed here to effectively exfoliate cellulose microfibrils. The flexible, ultralight, elastic, and multi-scale cellulose hybrid cryogels were manufactured by adding tiny dosage of polyamide-epichlorohydrin (PAE), which was employed here as flexible and crosslinked skeleton. Undergoing freeze drying and vacuum heating, a series of CMFs/PAEx cryogels were successfully acquired with superior mechanical and thermal insulation performances. CMFs/PAE0.5 cryogel achieved 2.5 folds stress at 80% compressive strain and 2.4 folds elastic recovery with respect to CMFs/PAE0. The hydrophobic modification of the CMFs/PAEx cryogels were readily accessible by dip-coating of palm wax and endowed these cryogels with good water repellency (contact angle of ∼128 o ). Overall, the proposed strategy open up novel perspectives for the design of cellulose cryogels and beyond.
研究领域:
材料科学
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生物材料工程
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DOI
高影响因子
ChemPlusChem
·
2025
·
IF 2.8
Yufei Liang,Tingting Zhao,Shuanjin Wang,Dongmei Han,Sheng Huang,Wei Liu,Hui Guo,Min Xiao,Yuezhong Meng
As the sole commercial polycarbonate derived from CO2, poly(propylene carbonate) (PPC) is still hindered by poor thermal stability and a low glass transition temperature. Hererin, we first report the terpolymerization of CO2, propylene oxide (PO) and epichlorohydrin (ECH) to synthesize PPC-ECH terpolymers via one-pot and metal-free method using multi-nuclear organoboron catalysts. The PPC-ECH terpolymers with well-rounded properties can be easily synthesized by adjusting reaction conditions, monomer ratios, catalyst types and loading. The molecular weight of the PPC-ECH terpolymer can reach up to 59.4 kg/mol, which is the highest known. Notably, the synthesized PPC-ECH exhibits outstanding barrier performance with oxygen permeability as low as 1.31 cm3·mm/(m2·day) and water vapor permeability as low as 0.016 g·mm/(m2·day), significantly lower than those of pure PPC or other common packaging materials. Importantly, the introduction of a small amount of ECH not only preserves the biodegradability of polycarbonate but also markedly enhances its mechanical properties, glass transition temperature, thermal stability and flame retardancy, offering promising prospects for application in packaging materials.
研究领域:
材料科学
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化学工程
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环境科学
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产品关联
DOI
PubMed
高影响因子
Materials
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2017
·Vol. 10
·期 4
·343
·
IF 2.654
Delong Wang,Mingchen Jia,Lanying Wang,Shuang Song,Juntao Feng,Xing Zhang
The influence of β-cyclodextrin-epichlorohydrin (β-CD-EP) polymers on the improvement of the solubility and antifungal activity of carbendazim has been investigated. Meanwhile, the potential of the chitosan and β-CD-EP composite film used as a plant healthcare material for carbendazim-controlled release to protect rape againstSclerotinia sclerotiorum(Lib.) de Bary has been evaluated. β-CD-EP-1 and 2 (β-CD content, 750 mg/g and 440 mg/g, respectively) were found to significantly improve the solubility of the guest molecule carbendazim (17.9 and 18.5 times, respectively) and the 1:1 stoichiometry of the host-guest was confirmed by the Job’s plot. A slight synergism was observed for the β-CD-EP/carbendazim complex againstS. sclerotiorum(Lib.) de Bary, indicating an enhancement to the bioavailability of carbendazim. The in vitro release studies revealed that β-CD-EP polymers could efficiently modulate carbendazim release behaviors, such as the release retard and rate. The in vivo efficacy experiments demonstrated that the β-CD-EP/carbendazim and chitosan composite film could significantly prolong the effective duration of carbendazim at a concentration of 100 μg/mL compared with spraying carbendazim at 500 μg/mL. Thereby, a highly useful and strategic concept in plant disease control by a plant healthcare material—the chitosan and polymeric β-CD-EP composite film—is provided, which could also serve as a concept for related plant diseases.Keywords:β-cyclodextrin-epichlorohydrin;chitosan film;antifungal activity;controlled release;Sclerotinia sclerotiorum(Lib.) de Bary
研究领域:
植物病理学
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农药科学
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2020
·
IF 3.594
Zhongping Huang,Chun Zhuge,Qiulian Zhu,Huijun Liu,Yuanbin She,Yan Zhu
A novel anion exchange stationary phase was synthesized based on polystyrene-divinylbenzene beads and poly (amine-epichlorohydrin) cationic polyelectrolyte. Epichlorohydrin and methylamine as monomers were used to prepare quaternized cationic polyelectrolyte and hyperbranched layers with a denser charged density and high hydrophilcity. Scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET), Fourier transform infrared spectra (FTIR) and elemental analysis were utilized to characterize the particle surface and chemical composition of modified microspheres. The chromatographic evaluation was investigated by separating the analytes containing of common anions (fluoride, chloride, nitrate, phosphate and sulfate) and polarizable anions (iodide, thiocyanate and thiosulfate). High column efficiency was obtained with the plate number per meter up to 20,607 N/m for chloride. Fast separation of five common anions and three polarizable anions was accomplished within 11 min. Finally, the contents of thiosulfate in water reducing agent samples were determined with the homemade column. The linearity of the method was satisfactory over a concentration range of 5–120 mg/L with a correlation coefficient of 0.9972. The relative standard deviations were all less than 1.50% for retention time, peak height and peak area. The recoveries over the range of 93.67–116.15% were obtained by analyzing real spiked samples. The result suggested that the prepared stationary phase exhibited effective separation, desirable reliability and considerable stability for application in common anions and polarizable anions analysis.
研究领域:
分析化学
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材料科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Shifeng Tang,Lin Zhang,Zhaohui Tong,Zhiping Wu,Hui Wang,Peng Zhan,Lishu Shao,Yan Qing,Yougen Wu,Jin Liu
As an essential trace element for plant growth and development , manganese plays a crucial role in the uptake of the heavy metal cadmium by rice ( Oryza sativa L.). In this study, we developed a novel slow-release manganese fertilizer named Mn@LNS-EL. Initially, lignin nanoparticles were derived from sodium lignosulfonate, and a one-step emulsification strategy was employed to prepare a water-in-oil-in-water (W/O/W) Pickering double emulsions. These double emulsions served as the template for interfacial polymerization of lignin nanoparticles and epichlorohydrin, resulting in the formation of microcapsule wall materials. Subsequently, manganese fertilizer (MnSO 4 ) was successfully encapsulated within the microcapsules. Hydroponic experiments were conducted to investigate the effects of Mn@LNS-EL on rice growth and the cadmium and manganese contents in the roots and shoots of rice under cadmium stress conditions. The results revealed that the treatment with Mn@LNS-EL markedly alleviated the inhibitory effects of cadmium on rice growth, leading to notably lower cadmium levels in the rice roots and shoots compared to the specimens treated without manganese fertilizer. Specifically, there was a reduction of 37.9 % in the root cadmium content and a 17.1 % decrease in the shoot cadmium content. In conclusion, this study presents an innovative approach for the high-value utilization of lignin through effective encapsulation and slow-release mechanisms of trace-element fertilizers while offering a promising strategy for efficiently remediating cadmium pollution in rice.
研究领域:
农业科学
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环境科学
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材料科学
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植物生理学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2012
·
IF 1.289
Yu Yi,Canlin Lai,Yuqi Jiang,Jianfeng Mei,Hong Wang,Guoqing Ying
In this article, we present a novel amino-reserved magnetic chitosan microsphere (ARMCM) prepared from chitosan and Fe 3 O 4 through inverse suspension crosslinking by formaldehyde and epichlorohydrin. The density of ARMCM was 1.47 g/mL, and the amino content was 2.44 mmol/g. The measurements data indicated that the saturation magnetization (σ s ) of ARMCM was 23.2 emu/g. The adsorption results showed that these magnetic chitosan microspheres had good adsorption capacity on endotoxin: the maximum absorption capacity was about 1792.1EU/g in 40 min; the endotoxin adsorption efficiency in the protein solution was close to 80% and what is more, protein adsorption efficiency was only 23.2 and 2.0%, respectively, for acidic and basic proteins. It is expected that this ARMCM will have a feasible and useful application in adsorbing endotoxin from biological products. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
研究领域:
材料科学
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生物技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
BIOMACROMOLECULES
·
2021
·
IF 6.988
Heng Fang,Nianrong Feng,Dongfu Wu,Dongying Hu
The collection, storage, and use of energy and information are important issues for overcoming the global energy shortage while satisfying the demand for information transmission. This research reports a nano-Fe3O4 and erythritol (ER)-functionalized, cross-linked methyl cellulose aerogel (MC–EP) composite that has the characteristics of phase-change energy storage as the magnetic and ultraviolet responses requisite for light-to-heat conversion and storage. The nano-Fe3O4 particles in MC–EP–ER-75 were fixed and filled into pore structures in MC–EP. ER was used to form an effective combination with MC–EP. The addition of nano-Fe3O4 compensated for the low thermal conductivity of ER. The MC–EP–ER-75 was able to store solar radiation-induced energy due to the loading of ER at a photothermal conversion efficiency of 79.67% and a light-to-heat conversion efficiency of 79.67%. The results of thermal stability (TGA) analysis showed that MC–EP–ER-75 was thermally degraded acceptably below 200 °C. The differential scanning calorimetry curve and latent heat values (melting/crystallization enthalpies of 314.8 and 197.9 J/g, respectively) of MC–EP–ER-75 did not change after 100 cycles. In addition, it exhibited excellent saturation magnetization, super-paramagnetism, and ultraviolet shielding, as well as a rapid response to the ultraviolet and magnetic fields. This provided a way to prepare light-to-heat conversion–storage–release materials and ultraviolet–magnetic sensors that can be used in renewable resources.
研究领域:
材料科学
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能量存储
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纳米技术
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复合材料
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光热转换
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Weisen Yang,Yifei Liu,Yaqin Zhu,Wenlong Jiang,Fengshuo Shi,Jiapeng Hu,Shaohua Jiang,Shaoju Jian
Aquatic ecosystem contaminated by organic dyes is one of the most crucial issues plaguing people worldwide, while water remediation through adsorption technology is the most sustainable option. Herein, two chitosan-based adsorbents were successfully fabricated by a facile one-step method under alkaline condition via electrospraying technology, then the above two materials were cross-linked with epichlorohydrin and grafted triethylenetetramine to prepare two kinds magnetic Fe 3 O 4 /CS-ET-1 and Fe 3 O 4 /CS-ET-2 microspheres for remediation of anion dyes namely Congo red (CR) in wastewater respectively. The morphology features, structure, composition, thermal stability, and pore diameter of the two adsorbents were acquired by SEM coupled with EDX, XRD, FTIR, TGA, and BET. The adsorption behavior of Fe 3 O 4 /CS-ET-1 and Fe 3 O 4 /CS-ET-2 microspheres towards CR from water was systematically evaluated. The determined isoelectric points (pHpzc) of Fe 3 O 4 /CS-ET-1 and Fe 3 O 4 /CS-ET-2 are orderly 7.4 and 7.8. The results confirmed that the CR remediation process can be simulated by PSO kinetic model ( R 2 > 0.995) along with Langmuir isotherm ( R 2 > 0.998) with maximal CR adsorption amounts by Fe 3 O 4 /CS-ET-1 and Fe 3 O 4 /CS-ET-2 microspheres of 1145.42 and 617.28 mg g −1 at pH = 7 and T = 25 °C, respectively. The negative Δ G 0 , positive Δ H 0 (28.65 and 8.02 kJ mol −1 ), and positive Δ S 0 (112.29 and 62.71 J mol −1 K −1 ) signified that the adsorption of CR onto Fe 3 O 4 /CS-ET-1 and Fe 3 O 4 /CS-ET-2 microspheres surface was spontaneous and endothermic in nature. After four consecutive cycles, both magnetic microspheres remained a superior CR removal performance, indicative of the stability and recyclability of the adsorbents.
研究领域:
环境科学
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材料科学
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化学工程
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2023
·
IF 4.1
Ya-Qi Zhao,Shi-Song Yu,Meng-Ying Chen,Yuan Wang,Yu-Jun Shi,Xin-Yu Wang,Jia-Meng Zhao,Lin-Yi Dong,Zhen-Yu Zhao,Xian-Hua Wang
Developing high-performance magnetic particles for the effective separation and purification of target proteins has become an important topic in the area of biomedical research. In this work, a simple and novel strategy was proposed for fabricating magnetic Fe3O4@agarose-iminodiacetic acid-Ni microspheres (MAIN), which can efficiently and selectively isolate histidine-tagged/rich proteins (His-proteins). Based on the thermoreversible sol-gel transition of agarose , basic magnetic agarose microspheres were prepared through the inverse emulsion method, in which the emulsion contained agarose and amine-modified Fe 3 O 4 nanoparticles. The size of the emulsion was controlled by the emulsification of a high-speed shear machine, which improved the specific surface area of MAIN. Subsequently, the amine-modified Fe 3 O 4 nanoparticles were covalently crosslinked with agarose through epichlorohydrin, which could avoid leakage of the magnetic source during use and increase the stability of MAIN. The microsized MAIN exhibited a clearly visible spherical core-shell structure with a diameter range from 3.4 μm to 9.8 μm, and excellent suspension ability in aqueous solution. The maximum adsorption capacity of MAIN for histidine-rich bovine hemoglobin was 1069.2 mg g −1 at 35 °C, which was higher than those of commercialized and most reported magnetic agarose microspheres/nanoparticles. The MAIN showed excellent adsorption ability and selectivity toward His-proteins in a mixture of histidine-rich bovine serum albumin (BSA) and histidine-poor lysozyme (LYZ). When the amount of LYZ was 5-fold higher than that of BSA, the recovery of BSA reached 75.0%. To prove its practicability, MAIN was successfully employed for the enrichment of histidine-tagged RSV-F0 from the cell culture medium supernatant. According to the optimized conditions, MAIN could enrich approximately 0.1 mg of RSV-F0 from 1 mL of complex biological sample. Therefore, we believe that the novel MAIN could be applicable for efficient separation and purification of His-proteins from complex biological systems.
研究领域:
生物医学研究
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蛋白质纯化
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磁性材料
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亲和层析
✓ 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）