Polymer Chemistry
·
2023
·Vol. 14
·期 24
·2902-2915
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IF 4.6
Xu Zhang,Dagang Li,Chang Cui,Shusen Chen,Meng Ji,Weiwu Tang,Le Yang,Fengqi Zhang,Jinying Li,Dongxiang Zhang,Xiyan Xu
Uranium extraction from seawater (UES) has important strategic significance as it can provide a solution to alleviate the future shortage of uranium resources for nuclear power production. This work reports an alginate-based three-dimensional (3D) supermacroporous AO-PAM/Alg hydrogel fabricated by facile cryo-polymerization and two-step grafting modification for efficient UES. The supermacroporous and 3D interconnected pore structure of AO-PAM/Alg facilitates an increased contact flux of seawater and the diffusion rate of uranyl ions. It shows a maximum uranium adsorption capacity of 1375 mg g−1 at room temperature (25 °C) and a pH of 6.0. In seawater, AO-PAM/Alg reaches adsorption equilibrium within 20 days, with a final adsorption capacity of 6.23 mg g−1. AO-PAM/Alg also exhibits considerable reusability and adsorption selectivity. The current AO-PAM/Alg hydrogel holds great potential for practical UES. The current macroporous adsorbent preparation strategy can be further applied to other 3D supermacroporous adsorbent materials.
研究领域:
材料科学
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环境科学
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核能工程
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DOI
高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2016
·Vol. 301
·期 6
·659-664
·
IF 2.834
Xilu Chen,Weiwei Sui,Dayong Ren,Yuanyuan Ding,Xiaoli Zhu,Zhiyong Chen
A versatile approach to synthesis of hydrophobic polymeric cryogels is proposed using acetic acid crystals instead of ice crystals as porogen through cryo-polymerization. In the range of 60 to 90 vol% of acetic acid, polymerization at ambient temperature gives rise to particulate polymers in beaded or amorphous shape, while polymerization at 4 °C, lower than the melting point of acetic acid (16.6 °C), leads to the formation of cryogel-like monoliths with supermacroporous structure, which is mainly ascribed to cryo-concentration effect. According to the measurements by scanning electron microscopy and mercury intrusion porosimetry, the dried samples are supermacroporous with pore size mainly ranging from several micrometers to several hundred micrometers, which can be feasible for rapid mass transfer. The forming cryogels display a superfast responsiveness to organic solvents, possibly stemming from their supermacroporosity and distinctive hydrophobicity.
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
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Chunjie Liu,Hua Huang,Haiyan Zhang,Liang Chen
Bio-butanol as a renewable energy can be produced through biomass fermentation. Among these, the adsorption-based technique is the most energy-efficient. However, the adsorption of small amounts of butanol from the aqueous phase remains a challenge. In this work, poly (methyl methacrylate)-based (PMMA) cryogel particles with tunable polarity and a super-macroporous structure were prepared by combining a simple dropping method and sulfolane freeze casting. The maximum adsorption capacities of the PMMA cryogel particles using the batch shaking and fixed-bed were 520.2 and 1442.2 mg/g, respectively. Adsorption rate constant of amphiphilic cryogel particles increased by approximately 9–40 times compared with PMMA cryogel particles. Adsorption capacity of the PMMA-based cryogel particles was maintained at 99 % of the initial adsorption capacity after 10 cycles. This study presented a strategy for the design of adsorbents with super-macroporous structures and hydrophilic modification to facilitate the adsorption of hydrophobic butanol from the aqueous phase system.
研究领域:
生物工程
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化学工程
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 136
·期 27
·47716
·
IF 2.188
Fenghao Guo,Yinping Wang,Xilu Chen,Mingqian Chen,Wei He,Zhiyong Chen
Cryogels are supermacroporous but restricted by lack of surface area in utilization to date. We here propose a method for fabrication of supermacroporous polydivinylbenzene (PDVB) cryogels with high surface area by redox-initiated cryopolymerization combined with solvothermal postcrosslinking technique. The PDVB precursor cryogels are prepared by redox-initiated cryopolymerization, followed by postcrosslinking of residual double bonds to form hypercrosslinked cryogels under solvothermal conditions. The hypercrosslinked cryogels maintain the original supermacroporosity and display very high surface area up to 1462 m 2 g −1 . We demonstrate the utilization of the resultant cryogel in uptake of carbon dioxide (7.9 wt % at 1 bar and 62.2 wt % at 25 bar, respectively) and uptake of aniline (333.3 mg g −1 at room temperature) from aqueous solutions. The adsorption behaviors of aniline on the hypercrosslinked cryogels are found to follow Langmuir model as well as Freundlich model in equilibrium adsorption and to follow pseudo-second-order model in kinetic adsorption, respectively. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47716.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Xiangyu Li,Zhiqing Wang,Yangang Mei,Ru Feng,Zheyu Liu,Jiejie Huang,Libo Dong,Yitian Fang
Sodium silicate solution obtained by alkali dissolving alumina-extracted residue (AR) of coal ash was used to fabricate mesoporous silica foam (MSF). The MSF supports can load with 80 wt% amine polymers due to its ultra-large pore volume, thus obtaining the maximum CO 2 adsorption capacity of 6.46 mmol/g under 75 °C and dry 100% CO 2 atmosphere. Moreover, the sorbents presented fast adsorption kinetics, low adsorption heat and regeneration heat, and stable adsorption-desorption cycle performance. Amine impregnated MSF derived from AR was a promising alternative for post-combustion CO 2 capture of power plant flue gas in the future.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2022
·
IF 5.876
Jinhao Du,Ruting Yuan,Feng Lin,Lijun Liao,Ge Yang,Furong Tao,Yuezhi Cui,Christine E.A. Kirschhock
Azonia-spiro compounds have been reported as organic templates for synthesizing many extra-large pore high silica zeolites , often isomorphically substituted by germanium . However, these templates are usually obtained in the presence of sodium hydroxide, leading to persisting sodium ions in the final products. Sodium cations may compete with azonia-spiro organics as templates during zeolite synthesis. Therefore, effect of any residual sodium cations on the synthesis results needs to be investigated. This work documents the effect of sodium ions on zeolite formation using four structurally similar azonia-spiro compounds as templates. Different silicogermanate zeolites (UTL, an unknown zeolitic phase, etc.) were formed in the absence of sodium cations. Notably, the syntheses of silicogermanate UTL and siliceous MTW zeolites using azonia-spiro[4,6] and [6,6] are reported for the first time. Controlled amounts of sodium chloride were added to zeolite crystallization mixtures without residual sodium hydroxide. In the presence of 0.005–0.1 mol/L Na + , silicogermanate zeolites were the dominant phases. Further increasing the Na + concentration to 0.152 and 0.317 mol/L, formation of UTL and an unknown silicogermanate phase were inhibited in favor of a dense sodiumgermanate (Na 4 Ge 9 O 20 ). Moreover, sodium ions next to azonia-spiro organic templates also influence the morphologies of the MTW zeolites. The observed high sensitivity of zeolite formation in the presence of even traces of sodium therefore has impact on synthesis protocols of large pore silicogermanate zeolites. This work highlights how small, often overlooked, factors in inorganic material synthesis can drastically change the outcome.
研究领域:
材料科学
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化学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 35
·e52842
·
IF 3.057
Jie-Ping Fan,Cong-Bo Huang,Yu-Tong Cheng,Chun-Fang Xie,Hui-Ping Chen,Hai-Long Peng
Bio-macromolecule hemoglobin (Hb) is a kind of iron-rich metalloprotein that abundant in erythrocytes with various physiological properties. Separating Hb from bio-matrix with high efficacy is crucial to Hb application but quite challenging. In this study, a supermacroporous molecularly imprinted membrane (MIM) was prepared with high performance on recognizing bovine hemoglobin (BHb). By using the silk fibroin and calcium alginate as mechanical modifiers, the mechanical strength of the prepared membrane was significantly improved to at around 0.25 MPa, and the supermacroporous structure in MIM was also formed. The MIM adsorption capacity of BHb was as high as 121.8 mg g −1 at the initial concentration of 0.5 mg mL −1 . The MIM separation factor of BHb from BHb/BSA mixtures was as high as 7.34, and the relative imprinting factor was at around 4.0. The prepared MIM demonstrated the superiority and the valuable application prospect on specific separation of BHb.
研究领域:
生物材料
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生物技术
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蛋白质分离
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膜科学
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DOI
高影响因子
CARBON
·
2018
·
IF 7.082
Zhe Wang,Dan Cheng,Chang Chen,Kebin Zhou
Hierarchically porous materials have drawn extensive attention to construct effective air cathodes in newly developed zinc-air batteries. Here, we successfully fabricated hierarchically porous carbon microspheres (HCMs) with fully open and interconnected super-macropores by a strategy of high internal phase W/O/W double emulsions (HIPDEs). The as-prepared HCMs-supported platinum nanoparticles (Pt/HCMs) were employed as novel ORR catalysts for the air cathodes of Zn-air batteries. It was found that Pt/HCMs promised a nearly 100% Pt utilization and showed a higher current density and better durability than the commercial Pt/C on rotating disk electrode (RDE) setup and gas diffusion electrode (GDE)-based half-cell configurations, highlighting the importance of the fully open and interconnected super-macropores for improving the gas/liquid phases transport. Benefiting from the superior mass transfer, the Pt/HCMs-based Zn-air battery delivered high power density (190 mW cm −2 ) and specific capacity (800 mA h g Zn −1 ) comparable to that of the commercial Pt/C-based battery. This study presents a new avenue to engineer catalyst to boost the performance of Zn-air batteries.
研究领域:
材料科学
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电化学
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能源存储
·
纳米技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Chunjie Liu,Dong Wang,Zimeng Wang,Haiyan Zhang,Liang Chen,Zhong Wei
Freeze-casting (ice templating) is generally used to prepare super-macroporous materials. However, water solubility limits the application of freeze-casting in hydrophobic material fabrication. In the present work, inexpensive and low-toxic sulfolane was used as a novel crystallization-induced porogen (sulfolane crystal templating) to prepare super-macroporous hydrophobic monoliths (cryogels) with tunable polarity. The phase transition of sulfolane consisted of reversible processes in the liquid, semi-crystalline, and crystalline states. Because of the density change during phase transition, liquid sulfolane experienced a 16.4% volume shrinkage per unit mass. Thus, the cryogels obtained using the conventional freezing method contained obvious hollow-shaped defects. Furthermore, a novel route of pre-cooling, pre-crystallization, crystal growth, freezing, and thawing (PPCFT) was employed to prepare cryogels with defect-free macroscopic morphology and uniform pore structure. The as-obtained cryogels were composed of a super-macroporous structures and interconnected channels, and their porosity ranged between 85 and 97%. Moreover, the cryogels manifested good hydrophobicity (contact angle = 120–130°) and had absorption capacities greater than 10 g g–1 for oils and organic liquids. The maximum absorption capacities of the resultant cryogels in dichloromethane, ethyl acetate, and liquid paraffin were 60.3, 35.8, and 15.2 g g–1, respectively. Moreover, sulfolane could conveniently dissolve hydrophobic and hydrophilic monomers to generate amphiphilic cryogels (contact angle = 130–0°). Therefore, sulfolane crystal templating is a potential fabrication method for super-macroporous hydrophobic materials with tunable polarity.
研究领域:
材料科学
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化学工程
·
高分子科学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Jing Cheng,Lijun You,Xixi Cai,Jinhao Yang,Huimin Chen,Xinming Shi,Jiajie Wu,Jianhua Wang,Caihua Xiong,Shaoyun Wang
Supermacroporous hydrogels have attracted wide concern due to their comfort and breathability in wearable health-monitoring applications. Size controllable supermacroporous structure and excellent mechanical properties are the most important for its application. However, they are normally fabricated by the cryogelation method, which is difficult to control pore size and maintain flexibility. Here, yeast fermentation-inspired gelatin hydrogels with a controllable supermacroporous structure and excellent mechanical properties were fabricated for the first time. The pore size can be controlled by adjusting the content of glucose and yeast, the ratio of glucose to yeast, fermentation time, and gelatin content during fermentation. The hydrogels demonstrated a controllable pore size range from 100 to 400 μm and rapid swelling characteristics. The mechanical properties were maintained by soaking ammonium sulfate solution for 12 h, showing maximum tensile and compressive strains over 300 and 99%, respectively. This novel approach can be easily applied to the preparation of supermacroporous and high ductility hydrogels under mild conditions. Furthermore, conductive hydrogels combined supermacroporous structures with conductive polyaniline and reduced oxidized graphene, and silver nanowires were prepared as wearable flexible sensors. The obtained sensors maintain well-distributed porosity, breathability, and mechanical flexibility, also showing excellent conductivity of 2.4 S m–1. Finally, the sensors were successfully applied to detect physiological signals and human–computer interaction.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
·
可穿戴技术
·
传感器
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 135
·期 41
·46740
·
IF 1.901
Jie-Ping Fan,Feng-Yan Zhang,Xue-Meng Yang,Xue-Hong Zhang,Ya-Hui Cao,Hai-Long Peng
A novel supermacroporous molecularly imprinted cryogel membrane (MICM) was prepared via cryopolymerization using a functionalized ionic liquid {(1-vinyl-3–(2-amino-2-oxoethyl) imidazolium chloride, [VAMIM]Cl]} as functional monomer. Bovine serum albumin (BSA) was selected as the model protein. The novel membrane has the advantages of several concepts, such as, the easy mass transport of cryogel, the multiple weak interactions of ionic liquid with protein, high selectivity of molecularly imprinted polymer, and continuous separation of membrane separation. The membrane was characterized by scanning electron microscopy (SEM), Fourier transform infrared spectrum (FT-IR), thermal gravimetric analysis (TGA), and X-ray photoelectron spectroscopy (XPS). Ovalbumin (Ova), lysozyme (Lys), and bovine hemoglobin (BHb) were selected as reference proteins to examine the selective recognition of BSA on MICM. The results of SEM images and the swelling ratios showed that MICM had a larger amount of interconnected supermacropores compared with NMICM, which was beneficial for BSA to be adsorbed onto and pass through MICM. The adsorption and permeation results indicated that MICM had better recognition selectivity and permselectivity to the objective protein BSA than NMICM. Overall, the results showed that the functionalized ionic liquid was a good choice to prepare supermacroporous MICM via cryopolymerization for selective recognition of BSA. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46740.
研究领域:
材料科学
·
生物技术
·
化学工程
·
高分子科学
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产品关联
DOI
高影响因子
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