FOOD CHEMISTRY
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2022
·
IF 9.231
Xinsheng Qin,Qingli Bo,Panzhu Qin,Sufang Wang,Kaiyong Liu
In this study, we demonstrated the role of whey protein isolate (WPI)/(−)-epigallocatechin-3-gallate (EGCG) covalent conjugates/gellan gum double network emulsion gels by duo-induction of glucono-δ-lactone (GDL) and CaCl 2 on the digestion viability of Lactobacillus Plantarum powders. We employed a novel one-step continuous cold gelation strategy to product double network emulsion gels. The gellan gum in continuous phase was first induced by CaCl 2 to form a gel in a short time. Besides, the GDL was improved covalent cross-linking between WPI-EGCG covalent conjugate Pickering particles or particle-coated oil droplets because of the slowly pH reduction. The first cross-linked gellan gum gels could be more closely integrated into the GDL-induced second gel networks with synergistic role, which promoted the formation of compact and homogeneous networks through hydrophobic interactions and disulfide bonds. Thus, the results provide a promising strategy for probiotic powders encapsulation of double network emulsion gels in oral applications of gel type foods.
研究领域:
食品科学
·
生物技术
·
药学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RENEWABLE ENERGY
·
2021
·
IF 8.001
Tianya Li,Kejian Wang,Jihao Wang,Yueqi Liu,Yufen Han,Zhiyang Xu,Guangyi Lin,Yong Liu
As a rising star, the fuel cell will be applied very broadly. However, when the fuel cell works at a high current, too much water yield and the redundancy water block the air or oxygen enter the fuel cell, then the power reduces sharply. The gas diffusion layer (GDL) in the fuel cell is the critical component to transfer water and gas. A novel GDL was prepared in this paper to improve transferability. The new GDL consists of one carbon paper and two microporous layers. The microporous layer close to carbon paper is modified by pore-former CaCO 3 . The total thickness of the new GDL is 270 μm; then, the samples were pressed to 220, 240, and 260 μm by rolling, respectively. The electrochemical impedance spectroscopy tests at a large current (2.5 A/cm 2 ) show that the fuel cell with 240 μm GDL has relatively small transmission impedance regardless of high or low humidity. The results show that the new GDL can significantly improve the water transferability of the proton exchange membrane fuel cell.
研究领域:
能源科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 4
·2010-2019
·
IF 3.361
Ke Zhou,Tianya Li,Yufen Han,Jihao Wang,Jia Chen,Kejian Wang
The gas diffusion layer (GDL) is an important component in the proton exchange membrane fuel cell (PEMFC), and the main function of GDL is to transfer water and gas. This paper explores the effect of the gradient hydrophobicity of GDL on the proton exchange membrane fuel cell (PEMFC). The gradient GDL design uses two microporous layers (MPL). First, polytetrafluoroethylene (PTFE) : carbon black in MPL near the carbon paper side was fixed at 3 : 7, and then the content of PTFE : carbon black in MPL near the catalyst layer (CL) was set to 3 : 7, 2 : 8 and 1 : 9. Second, the fixed PTFE : carbon black in MPL near the carbon paper side was 2 : 8, and the PTFE : carbon black in MPL near CL was 2 : 8 and 1 : 9. We found that, when near the carbon paper side and PTFE : carbon black = 3 : 7, GDL can obtain good cell performance through gradient hydrophobic treatment. Moreover, when near the carbon paper side and PTFE : carbon black = 2 : 8, the cell performance did not change much after GDL gradient hydrophobic treatment. We found that when GDL is subjected to a gradient hydrophobic treatment, the content of PTFE and carbon black must be rationally allocated to obtain good water management capabilities.
研究领域:
能源科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Yanfei Xu,Changwei He,Zheng Zhou
The gelation of walnut protein isolates has not been extensively studied, mainly due to their inherent poor dispersity. This study investigated the gelation of alkaline-extracted walnut protein isolates (AWPI) and phosphorylated walnut protein isolates (PWPI) induced by heat treatment with glucono-δ-lactone (GDL) acidification, focusing on the impact of GDL concentrations on microstructure, rheology, and texture of the resulting gels. The PWPI gel exhibited lower hardness but a smoother structure than the AWPI gel. Notably, acidification with GDL (0.6–1.2%) significantly increased the stiffness of PWPI gels, increasing storage modulus and yield stress 10–50 times, while weakening AWPI gels. Varying concentrations of GDL effectively modulated the microstructure of the PWPI gels, leading to the altered texture (from a soft-solid state to a well-self-supporting stiff-solid gel) and water holding capacity (from approximately 46% to 85%). Additionally, hydrophobic interactions and disulfide bonds were identified as the primary forces involved in the gels.
研究领域:
食品科学
·
蛋白质化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
·
2022
·Vol. 14
·期 6
·1165
·
IF 4.967
Wen-Long Ma,Chuan-Lin Mou,Shi-Hao Chen,Ya-Dong Li,Hong-Bo Deng
Citral is a typical UV-irritation and acid-sensitive active and here we develop a mild method for the encapsulation of citral in calcium alginate microcapsules, in which UV irritation or acetic acid is avoided. Monodispersed oil-in-water-in-oil (O/W/O) emulsions are generated in a capillary microfluidic device as precursors. The middle aqueous phase of O/W/O emulsions contains sodium alginate, calcium-ethylenediaminetetraacetic acid (EDTA-Ca) complex as the calcium source, and D-(+)-Gluconic acid δ-lactone (GDL) as the acidifier. Hydrolysis of GDL will decrease the pH value of the middle aqueous solution, which will trigger the calcium ions released from the EDTA-Ca complex to cross-link with alginate molecules. After the gelling process, the O/W/O emulsions will convert to alginate microcapsules with a uniform structure and monodispersed size. The preparation conditions for alginate microcapsules are optimized, including the constituent concentration in the middle aqueous phase of O/W/O emulsions and the mixing manner of GDL with the alginate-contained aqueous solution. Citral-containing alginate microcapsules are successfully prepared by this mild method and the sustained-release characteristic of citral from alginate microcapsules is analyzed. Furthermore, a typical application of citral-containing alginate microcapsules to delay the oxidation of oil is also demonstrated. The mild gelling method provides us a chance to encapsulate sensitive hydrophobic actives with alginate, which takes many potential applications in pharmaceutical, food, and cosmetic areas.Keywords:alginate microcapsules;microfluidic;GDL;citral;mild gelling method
研究领域:
材料科学
·
食品科学
·
药物递送
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Ye Peng,Ja-Yeon Choi,Kyoung Bai,Liliang Tian,Shijun Liao,Yi Zhang,Dongchu Chen,Dustin Banham
Membrane electrode assemblies (MEAs) for proton exchange membrane fuel cell (PEMFC) applications must survive fuel starvation events which occur when the flow field becomes blocked by dust/debris/or ice (during freeze events) leading to high (>2 V) potentials at the anode. While most research has focused on optimizing these ‘reversal’ catalysts, recent work has also demonstrated that anode layer thickness/structure has an enormous impact on anode durability. In the present work, the impact of catalyst layer structure is studied in more detail, with a focus on understanding the mechanism for this improvement. The effect of both anode layer thickness as well as the spatial distribution of Ir within the anode layer is evaluated. The longest reversal time is found to result from thin layers, or placing the Ir adjacent to gas diffusion layer (GDL) interface. While both approaches lead to improved reversal times, reducing anode layer thickness is found to be a more promising approach as it results in less degradation during reversal, and is easier to manufacture vs. selectively placing the Ir adjacent to the GDL.
研究领域:
材料科学
·
电化学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Mechanical Behavior of Biomedical Materials
·
2022
·
IF 4.042
Yexiao Guan,Yanrui Mao,Jianguo Liao
In this paper, given the lack of osteogenic activity of sodium alginate (SA) hydrogel and to simulate the composition of natural bone, ionic-crosslinking NBG/n-HA/SA hydrogel scaffolds were prepared by using nano bioactive glass (NBG) and nano hydroxyapatite (n-HA) with high bioactivity as composite calcium sources and reinforcement phases, and D-gluconic acid δ-lactone (GDL) as the coagulant. The results showed that the mixture of the precursor forming the network had good injectability and plasticity. When the dosage of GDL was 0.75 g, the gelling time of the composite hydrogel could be regulated within 4–8 min, and the hydrogel had high compressive strength (170–220 kPa), as well. When the mass ratio of calcium source to SA was 1:1, the crosslinking network was relatively uniform with a considerable number of large pores around 40 μm in the structure. In the immersion experiment in vitro, it was found that the composite hydrogel could promote the deposition of bone-like apatite on the material's surface. Meanwhile, the cell experiments in vitro verified that the NBG/n-HA/SA composite hydrogel had good cytocompatibility without cytotoxicity. Moreover, the composite hydrogel could enhance the activity of ALP of mouse bone marrow mesenchymal stem cells , and thus, it had good osteogenic activity.
研究领域:
生物材料
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组织工程
·
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jingjing Yuan,Menghan He,Jueying Yang,Kang Li,Kexiang Fan,Hang Luo,Bo Li,Yu Chen
Femur fracture becomes increasingly common due to global population aging. Intramedullary nailing, a widely used treatment for fractures, tends to damage the blood vessels in the bone marrow cavity, which causes substantial hidden bleedings. The application of hydrogels to intramedullary nail hemostasis is limited by the challenges in balancing the adhesion, mechanical strength, and toughness. Inspired by the multi-network structure of snail mucus, which offers strong adhesion in harsh environments via adaptive wet-state contact followed by tight fitting upon dehydration, we developed a dual-network carboxymethyl chitosan (CMCS)-gluconic acid δ-lactone (GDL)-Ca 2+ /polyacrylamide (PAM) (CGC/P) hydrogel. The integration of GDL with CMCS introduces hydroxyl groups to enhance the adhesion of hydrogel and regulated system pH to facilitate the formation of the dynamic CMCS-GDL-Ca 2+ physical crosslinking network. The chemically crosslinked PAM network further improves the strength and toughness of the hydrogel. As the adhesion strength of the hydrogel can be increased by up to 50.14 times upon dehydration, a stretch-winding and dehydration method is developed to coat intramedullary nails with controllable thickness, effective hemostatic properties, excellent mechanical and adhesion characteristics. In rabbit femoral intramedullary nailing surgery, this system achieves rapid hemostasis and greatly promotes osteogenesis. Our study simultaneously improves the performance regulation contradiction of hydrogel coating, providing a crucial support to promote the application of hemostatic coatings to implantations.
研究领域:
生物医学工程
·
材料科学
·
组织工程
·
骨科
·
生物材料
✓ 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）