LWT-FOOD SCIENCE AND TECHNOLOGY
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2022
·
IF 6.056
Shuangqi Tian,Bingxiu Yu,Ke Du,Yongheng Li
Wheat germ albumin (WGA) has potential as a high protein food ingredient which is rich in nutrients and contains a number of antioxidant polypeptides. In this paper, membrane separation and gel chromatography purification, which were already used as a powerful separation technique in the food industry, was used to improve the antioxidant activity of wheat germ albumin hydrolysates. After the wheat germ albumin was hydrolyzed by papain, the obtained hydrolyzed solution was separated by ultrafiltration to four fractions with molecular weight (3 KD, 3–5 KD, 5–10 KD, and >10 KD). The results showed that the antioxidant activity of wheat germ albumin polypeptide with molecular weight cutoff less than 3 kD was significantly greater than that of the other three fractions. The oxidation resistance of the fractions after gel chromatography was P 3 >P 2 >P 1 >P 4 in descending order. In this paper, the results showed that microwave-assisted enzymatic hydrolysis could greatly shorten the enzymatic hydrolysis time, but the specific mechanism of microwave-assisted proteolysis and potential applications of purified peptides in food or pharmaceutical still needs further study.
研究领域:
食品科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 139
·期 7
·51634
·
IF 3.125
Xianghui Dai,Xia Yu,Jian Zheng,Xiaoxu Yang,Jianjun Pan,Xiaoting Zhang,Jie Min
The resorcinol diglycidyl acrylate (RDA) is firmly introduced to the surface of polyester (PET) fibers by a simple dip-rolling and baking method, and a free radical polymerization reaction is initiated on the surface of PET fabrics under ultraviolet light (UV) light to obtain three hydrogel layers with different structure, including polyacrylamide (PAAM), polyacrylic acid (PAAC) and poly-N-isopropylacrylamide (PNIPAAM). It is shown that the pretreatment-UV grafting method can be used to obtain hydrogel layers with porous structure on the surface of PET fabric, and all three hydrogel layers have better frictional properties than kelp. Among them, the friction coefficient of PET-PAAM surface can reach 0.02, which is 17% of the friction coefficient of kelp surface and 83% lower than that of the untreated PET fabric surface, giving the PET fabric surface excellent interfacial drag reduction characteristics. It can be applied to the surface of underwater activity equipment as well as ships to improve moving efficiency and reduce energy consumption.
研究领域:
材料科学
·
生物仿生学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL LETTERS
·
2018
·
IF 1.206
Jiemei Wang,Runhui Yu,Furong Tao,Yuezhi Cui,Tianduo Li
A double-layered sensor was prepared by an electrospinning method using pyrene, polystyrene, and gelatine to prepare a pyrene-polystyrene/gelatin/glass device for the determination of nitroaromatics. The pyrene- polystyrene top layer, which was an electronspun membrane from a mixture of the starting materials in 3:1 N, N-dimethylformaide:tetrahydrofuan, served as the sensing layer for detecting 2,4-dinitrotoluene. The bottom layer was the gelatin electrospun membrane that served as an intermediate between the top layer and the glass slide. The dinitrotoluene analyte was transferred into the sensing layer above and below due to the porosity of the gelatin layer. With a large number of hydroxyl and amino groups, the gelatin layer formed hydrogen bonds with the 2,4-dinitrotoluene molecules, which caused the enrichment of the analyte around the gelatin layer. Additionally, single-layer pyrene-polystyrene/glass sensor was also prepared for control measurements. The quenching efficiency of the pyrene-polystyrene/gelatin/glass sensor was 76.7% at equilibrium obtained within 6 minutes, while the monolayer sensor pyrene–polystyrene/glass device provided 65.8% quenching efficiency within 6 minutes. The gelatin layer played an important role in the superior performance of the double-layered sensor.
研究领域:
分析化学
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材料科学
✓ 已验证
DOI
高影响因子
Nanoscale Advances
·
2018
·Vol. 1
·期 1
·389-394
·
IF 0
Linlin Zang,Ru Lin,Tianwei Dou,Lu wang,Jun Ma,Liguo Sun
Nanofibrous membranes have a high specific surface area and large porosity, which are beneficial for being used as adsorbents to remove heavy metal ions from water. In this work, electrospun nanofibers were wrapped with a hydrogel layer with a tunable thickness, which endowed the membrane with excellent superhydrophilic performance. Because of good water-retention properties and abundant functional groups originating from the hydrogel layer, as a static adsorbent, the maximum adsorption capacity of Pb(II) was up to 146.21 mg g−1 according to the Langmuir model. Meanwhile, the electrospun membrane also possessed water permeability as a flow-through membrane for dynamic adsorption, which was obviously different from traditional hydrogel adsorbents. As a result, the rejection ratio of Pb(II) can remain over 55% after running for 72 h under high pH conditions and at low initial ion concentrations. Apart from these, cycle operations confirmed the regeneration of the membrane, and competitive adsorption experiments illustrated the selective removal of Pb(II) in a mixed ion solution.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Liping Li,Wanhui Shi,Sheng Zhu,Yunzhen Chang,Wenjing Hou,Ying Zhang,Hongfei Wang,Gaoyi Han
Developing strain sensors with metal film as sensing material is effective route in monitoring human physiological signals. However, most of them exhibits narrow stretchable range, poor detection limit and durability due to the rigidity and low ductility of metal. Here, a wrapping strategy is proposed to fabricate the strain sensor, which employs hydrogel layer to coat conductive Ni film deposited on rubber band to form one-dimensional hierarchical structure. Impressively, the strain sensor achieves a low sensing strain of 0.005 %, high stretchability of 352 % and ultimate strength of 1870 kPa. Fast response time (0.32 s), high gauge factor (GF=33) and low electrical hysteresis are other characteristics of the sensor. It also presents excellent durability and frost-resistance, in which the electrical signals (ΔR/R 0 ) still keep exceedingly steady after 10,000 and 1000 cycles at 25 °C and -30 °C, respectively. As expect, it is sensitive in detecting breathing, pulse wave, facial expression, speech and joint bending signals in real time. This work provides a significant research idea to exploit highly durable and stretchable strain sensors for physiological monitoring.
研究领域:
生物医学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Fengling Tang,Jing Yang,Ligang Lin,Zitian Liu,Qiying Wang,Wensong Ma,Huiyang Shang,Hao Wu,Aishan He
In the field of wastewater treatment, the efficient separation of dyes/salts and the high-pressure drive easily results in concentration polarization and membrane contamination. In this study, inspired by the capillary effect of natural sponge structure, an aerogel layer with a bionic three-dimensional mesh porous sponge structure was designed to construct an ultra-low-pressure membrane. With the assistance of tannic acid, the carboxymethyl cellulose (CMC) aerogel layer were constructed on the surface of polyvinylidene fluoride (PVDF) membrane using the layer-by-layer cross-linking and freeze-drying methods. The unique three-dimensional mesh structure of the aerogel provides a capillary effect that accelerates the rapid transport of water molecules. The introduction of polypyrrole (PPy) to the aerogel improves the mechanical properties of the aerogel, helping avoid the collapse during the separation process. Meanwhile, the formed PPy improves the membrane separation performance. The results showed, that under near-zero pressure conditions, the modified membrane had excellent dye/salt separation performance (dye rejection >99 %, salt rejection <10 %) and high flux of pure water (101.3 L·m −2 ·h −1 ). Moreover, the membrane also maintained good long-term stability. The study demonstrated the potential of using membrane for dye/salt separation applications by constructing bionic sponge-structured aerogels having capillary effect and good mechanical strength on membrane.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Qian Yu,Bilin Liang,Siqi Jia,Fang Li,Qiming Li
A novel approach was developed to fabricate defect-free MIL-96 membranes on an α-Al 2 O 3 support by combining aluminum isopropoxide coating with mixed-solvent regulation. The aluminum isopropoxide gel on the support functions as an active Al source, directing MIL-96 crystal nucleation and growth. A subsequent secondary crystallization can produce a well-intergrown MIL-96 membrane. Here, the gel coating inhibits the preferential crystallization of MIL-96 particles in the support pores, optimizing the microstructure and diminishing inter-crystal defects. By accurately adjusting the formic acid to N-methylformamide ratio in synthesis solution, a balance between membrane crystallinity and formation is achieved. Membrane separation property evaluation revealed an outstanding H 2 permeance of 1800 GPU and an H 2 /CO 2 separation factor of over 24.0, outperforming some advanced polycrystalline MOF membranes. This approach provides a potentially cost-efficient method for the large-scale preparation of MIL-96 membranes, holding great potential for practical applications in membrane separation.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Min He,Qian Wang,Rui Wang,Yi Xie,Weifeng Zhao,Changsheng Zhao
To inhibit bacteria attachment and the subsequent formation of biofilms on poly(ether sulfone) (PES) membranes, poly(sulfobetaine methacrylate)/poly(sodium acrylate) antibacterial hydrogel thin layers were covalently attached onto the membranes, followed by loading with Ag nanoparticles. In our strategy, double bonds were firstly introduced onto the PES membrane surfaces to provide anchoring sites, and then the hydrogel layers were synthesized on the membrane surfaces via UV light-initiated crosslinking copolymerization. Then, Ag ions were adsorbed into the hydrogel layers and reduced to Ag nanoparticles by sodium borohydride. The amounts of the adsorbed Ag ions were controlled by the mole ratios of carboxylate groups in the hydrogel layers. After attaching the hydrogel layers, a typical 3D porous structure was observed by scanning electron microscopy, and the surface chemical composition variations were characterized by attenuated total reflection-Fourier transform infrared spectroscopy. The live/dead staining, inhibition zone, and the optical degree of co-culture solution demonstrated that the designed surfaces could not only effectively resist bacteria attachment but also kill the surrounding bacteria Escherichia coli and Staphylococcus aureus. It was noteworthy that the strong antibacterial ability could be maintained for more than 5 weeks. Additionally, the excellent hemocompatibility of the modified membranes was confirmed by undetectable plasma protein adsorption, suppressed platelet adhesion, prolonged clotting time, low hemolysis ratio, and suppressed blood-related complement activation. Cell culture tests indicated that the membranes showed no cytotoxicity, but strong anti-cell adhesion properties. The proposed method to fabricate antibacterial hydrogel thin layers has great potential to be widely used to inhibit the formation of biofilms on various biomedical devices.
研究领域:
材料科学
·
生物医学工程
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Energy Storage Materials
·
2025
·
IF 20.2
Lei Zhu,Dengxu Wu,Chang Guo,Jian Peng,Zhiwen Jiang,Guangtao Ma,Chang Xu,Weitao He,Liquan Chen,Fan Wu
Cylindrical batteries have been explored as promising grid energy storage device, due to their high safety margin and low capital/maintenance costs. However , the practical application of cylindrical batteries is hindered by their high operational temperatures (above 240 °C). Herein , we report a sulfide-based cylindrical battery with a significantly reduced operating temperature of 30 °C, enabled by a sulfide solid electrolyte tube, a liquid lithium anode, and an in-situ polymerized gel layer. The battery demonstrates stable performance over a temperature range of 20–55 °C, maintaining 98 % of its capacity after 50 cycles at 30 °C and achieving 80 % energy efficiency. Additionally, the battery recovers stable electrochemical performance after freezing at -70 °C for 6 h. The symmetric battery also exhibits stable cycling for 500 h at 1 mA cm - ², with a 33.01 % increase in critical current density to 4.07 mA cm - ², attributed to optimized ceramic sintering that reduces grain boundaries. This work addresses a century-old challenge in cylindrical batteries by incorporating room-temperature superionic-conductivity sulfide electrolyte tubes, significantly lowering operating temperature, costs, and associated risks.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Deliang Zhu,Xiaoyu Ji,Jiangnan Li,Chengyang Zhu,Hongyan Tang
Membrane fouling in water treatment impacts the efficiency and lifetime of nanofiltration (NF) membranes. Between the polyvinylidene fluoride (PVDF) substrate and the polyamide (PA) layer, sodium alginate (SA) hydrogel interlayers were introduced in this study. Subsequently, nano-CaCO 3 was deposited on the SA hydrogel interlayers membrane (PA-Alg membrane), encapsulated within the membrane using the interfacial polymerization (IP), and dissolved with acid to form nanovoids. Thus, NF membranes with excellent antifouling property and high permeability were fabricated. The SA hydrogel interlayers and the deposition and dissolution of nano-CaCO 3 were verified by X-ray photoelectron spectroscopy and Fourier transform infrared. A smooth membrane surface was observed using scanning electron microscopy and atomic force microscopy. The flux of the SA hydrogel interlayers and nanovoids (PA-Alg-NV) membrane was 86 % greater than that of the pristine membrane. The rejection values of the PA-Alg-NV membrane for MgSO 4 and MgCl 2 were 95.6 % and 95.1 %, respectively. The flux recovery ratio for humic acid, bovine serum albumin, oil/water emulsion, and SA through PA-Alg-NV membrane were 97.2 %, 97.3 %, 97.4 %, and 97.9 %, respectively. Long-term fouling tests and ten-cycle fouling tests indicated that the PA-Alg-NV membrane exhibited stable antifouling property. In general, the high permeability and excellent antifouling property of the PA-Alg-NV membrane were attributed to the SA hydrogel interlayers, which increased hydrophilicity and reduced PA layer intrusion into the pores, forming a thin and smooth surface. In addition, the permeability was further enhanced by the nanovoids within the membrane. This study presented an efficient approach for fabricating NF membranes with excellent antifouling property and high permeability.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Jiasheng Wei,Lei Dai,Ping He,Meng Zhu,Feng Jiang,Zhaoxiang Zhou,Guiqiang Fei,Tingzhou Lei
MXene-contained paper is a good choice to design ultrathin and flexible electromagnetic interference (EMI) shielding materials. However, the deficiencies in strength and stability of MXene-contained paper impede its practical applications. Herein, a composite paper was proposed to address the problems, in which a filter paper was modified with a three-layer structured surface via a facile layer-by-layer coating procedure. Specifically, the TEMPO-oxidized cellulose nanofibers (TOCN)/cationic starch (CS)/MXene gel layer and TOCN/MXene nacre structure layer ensured the good EMI shielding and mechanical performances of the composite paper, while the uppermost TOCN/CS hydrogel film layer mainly protected MXene. The composite paper achieved an EMI SE of 40.3 dB at a thickness of merely 0.1894 mm (SE/ t value of ca. 212.8 dB mm −1 , SSE/ t values of ca.13216 dB cm 2 g − 1 ) and the total MXene dosage was 20 g m − 2 . Its tensile strength could be up to 11.7 MPa while the original filter paper was 6.4 MPa. Four pieces of this composite papers could be easily packed together to attain an EMI SE of nearly 70 dB. Importantly, the hydrogel film layer efficiently protected the MXene and maintained the EMI shielding performance of the composite paper when immersed in different liquids including water, HCl (1 M) and ethanol, due to the dense and compact structure of hydrogel film layer. This work provides a practical way to develop ultrathin, flexible and durable EMI shielding materials.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 18
·e202400620
·
IF 1.9
Jincheng Zhang,Bingchun Jiang,Lei Ling,Yusheng Lu,Tianyu Zou,Bozhong Cao,Tong Zhang
Graphical The zinc anode was modified by constructing a silica aerogel layer with ultra-high specific surface area and abundant polar functional groups (−OH, −COOH, −CH 3 ), which not only provided abundant active sites for the uniform deposition of zinc ions, but also mitigated the dissolution of Zn 2+ in the electrolyte and successfully suppressed the zinc dendrites and the related side reactions, thus improving the stability of the zinc metal anode. Aqueous zinc ion batteries have the advantages of low cost, high safety, high theoretical specific capacity. However, the charging and discharging process is usually accompanied by side reactions such as dendrite growth, hydrogenolysis, corrosion of electrodes, passivation, etc., which limits the development and application. In this work, the zinc anode is modified by constructing a silica aerogel layer with ultra-high specific surface area and abundant polar functional groups (−OH, −COOH, −CH 3 ), which not only provides abundant active sites for the uniform deposition of zinc ions, but also construct an artificial protective layer that acting as a desolvation layer and a zinc ion flux regulator. Consequently, the altered zinc anode exhibits an extremely durable zincophilic characteristic and a declining interfacial impedance. The constructed artificial layer can prevent side reactions and promote uniform zinc ion deposition to prevent the generation of zinc dendrites during the charge/discharge process. Results show that the symmetric cells composed of modified Zn anodes can be stably cycled for more than 1100 h at 0.5 mA cm −2 and 0.5 mAh cm −2 , which is much higher than that of bare Zn. In addition, the life and capacity retention of the Zn/MnO 2 full cells were also significantly improved.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）