JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2014
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IF 3.107
Rong Shi,Qiuyue Zhang,Frank Vriesekoop,Qipeng Yuan,Hao Liang
Food-grade organogels are semisolid systems with immobilized liquid edible oil in a three-dimensional network of self-assembled gelators, and they are supposed to have a broad range of potential applications in food industries. In this work, an edible organogel with tea polyphenols was developed, which possesses a highly effective antioxidative function. To enhance the dispersibility of the tea polyphenols in the oil phase, a solid lipid–surfactant–tea polyphenols complex (organogel complex) was first prepared according to a novel method. Then, a food-grade organogel was prepared by mixing this organogel complex with fresh peanut oil. Compared with adding free tea polyphenols, the organogel complex could be more homogeneously distributed in the prepared organogel system, especially under heating condition. Furthermore, the organogel loading of tea polyphenols performed a 2.5-fold higher antioxidation compared with other chemically synthesized antioxidants (butylated hydroxytoluene and propyl gallate) by evaluating the peroxide value of the fresh peanut oil based organogel in accelerated oxidation conditions.
研究领域:
食品科学
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材料科学
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化学工程
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DOI
PubMed
高影响因子
Polymers
·
2020
·Vol. 12
·期 10
·2171
·
IF 3.426
Yingjie Luo,Xiaoxia Huang,Shun Yao,Lincai Peng,Fulin Li,Hang Song
A series of imidazolium ionic liquid monomers with L-Proline anions (ViImCn-L-Pro and (ViIm)2Cn(L-Pro)2) were firstly synthesized, after which new copolymer materials were prepared by polymerization of the ionic liquid monomers with N,N′-methylene diacrylamide (MBA). Polymerization conditions, including the ratio of Ils(ViImCn-L-Pro or (ViIm)2Cn(L-Pro)2) and MBA, solvent, ionic liquids and initiator’s amount, were investigated and found to have an important effect on the adsorption capacity. Polymerization conditions were shown to have more significant impacts on adsorption capacities in the following order: the ratio of Ils and MBA > the amount of initiator > ionic liquids > solvent. The polymers were characterized by IR, EA, SEM, particle size distribution and TG. One of the polymers exhibited the highest selective adsorption capacity of tea polyphenols (521 mg/g). which was significantly higher than other adsorption media. The absorbed tea polyphenols could be desorbed readily with 2% hydrochloric acid methanol solution as eluent. The polymer material could maintain a higher adsorption capacity after four reuses. Based on this polymer, a new method for the efficient separation of tea polyphenols from tea water could be developed.Keywords:ionic liquid polymer;imidazole;amino acid;adsorption;tea polyphenols
研究领域:
化学工程
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食品科学
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DOI
PubMed
高影响因子
SURFACE & COATINGS TECHNOLOGY
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2025
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IF 6.1
Jihan Liao,Xiaohong Li,Guoqiang Li
The deposition of hydroxyapatite coatings on the surface of magnesium alloys has proven to be an effective option for efficiently reducing their corrosion resistance and increasing their bioactivity. However, the challenge of implant-associated infections due to inadequate antimicrobial properties remains. In this work, a hydroxyapatite/tea polyphenol (HA/TP) composite coating was prepared on a magnesium alloy (AZ31B) substrate by a one-step hydrothermal method. The aim was to retard the corrosion rate of the magnesium alloy while synergistically combining the bioactivity of HA with the antimicrobial properties of TP to realize the multifunctionality of the material. The optimum reaction conditions for the precursor solution at pH 8.5 were determined by the morphology of the coating surface and the crystallographic phase analysis. Fourier transform infrared spectroscopy analysis experiments showed that chemical bonds were formed between HA and TP, which improved the stability of the structure. Antimicrobial experiments showed that the addition of TP exhibited broad-spectrum antibacterial activity against Escherichia coli and Staphylococcus aureus . Electrochemical experiments showed that the HA/TP coating reduced the corrosion rate of magnesium alloys to 0.349 mm/y. In addition, the coating exhibited excellent biocompatibility, promoted the proliferation of MC3T3-E1 osteoblasts and had the ability to rapidly induce mimetic mineralization. This study presents a novel strategy for the preparation of multifunctional coatings with both corrosion resistance, osteogenic activity and antimicrobial properties, providing a potential solution for degradable magnesium-based bone implants.
研究领域:
生物材料学
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医学工程
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DOI
高影响因子
ACS Biomaterials Science & Engineering
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2024
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IF 5.4
Jialuo Chen,Zhipeng Li,Xinpeng Chen,Yurong Sun,Jin Cheng,Aijing Li,Shenzhou Lu,Tieling Xing
Adhesives have garnered significant interest recently due to their application in the field of biomedical applications. Nonetheless, developing adhesives that exhibit robust underwater adhesion and possess antimicrobial properties continues to pose a significant challenge. In this study, motivated by the adhesive mechanism observed in mussels in aquatic environments, dopamine (DA) was added to modify the silk fibroin (SF) solution. Subsequently, tea polyphenol (TP) was incorporated to form a sticky mixture, resulting in a biomimetic adhesive (TP-DA/SF). TP-DA/SF demonstrated rapid, robust, and indiscriminate adhesion to a wide array of substrates and even biological tissues (39 kPa). TP-DA/SF exhibits the ability to replicate the mussel adhesion mechanism of mussels underwater thanks to its biomimetic design. This characteristic provides the material with robust adhesion (40 kPa), notable reusability (at least 10 times), and long-lasting stability, especially in aquatic settings. It is worth noting that TP-DA/SF also demonstrated high adhesion in various water environments, even in solutions with a pH of 7.4 and buffered saline (PBS), which is one of the most widely used buffers in biochemistry research, offering salt-balancing and adjustable pH buffering capabilities. Meanwhile, TP-DA/SF exhibits excellent antibacterial and antioxidant properties due to its tea polyphenol content. After 15 days of wound closure in SD rats, the healing rate in the experimental group reached 93.4%, compared to 83.9% in the control group. Thus, the TP-DA/SF adhesive holds promising potential for biomedical applications, including sutureless wound closure and tissue adhesion.
研究领域:
生物医学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
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2024
·Vol. 149
·期 12
·5985-5994
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IF 3
Liao Xueqin,Du Longjin,Sun Mengxia,Liu Hui,Liu Jianzhong
Aluminum has been long and widely used in propellants, thermite, and pyrotechnics. However, the commonly used micron aluminum has the problems of slow burning rate and incomplete release of chemical energy in the combustion process. Therefore, finding ways to promote the ignition and combustion of aluminum is essential to enhance the performance of aluminum-based energetic materials. Herein, environmentally friendly tannic acid (TA) and tea polyphenols (TP) were used to surface modify aluminum to improve its combustion performance, respectively. The results showed that TA and TP could be coated on the outer surface of aluminum particles effectively by solvent evaporation induced self-assembly method. Heat was released during the thermal decomposition of the composite particles, which was clearly beneficial in promoting aluminum ignition. Ignition and combustion tests showed that after modification with TA and TP, the samples showed shorter ignition delay, increased combustion time, increased combustion intensity, and reduced agglomeration compared to pure aluminum. This revealed that the modified samples possessed better ignition and combustion properties. The X-ray diffraction patterns of the condensed combustion products showed that the products of pure aluminum possessed more active aluminum and aluminum nitride, while the samples modified with TA and TP had more γ-Al 2 O 3 and α-Al 2 O 3 , suggesting that TA and TP could effectively enhance the combustion efficiency of aluminum. In addition, TP showed better modification than TA, which may be related to the higher heat release during thermal decomposition of TP. Although TA and TP can improve the ignition and combustion performance of aluminum to some extent, the enhancement effect is limited. Considering that TA and TP possess good adhesion, perhaps they can play a better role in promoting as intermediate layers in the future. It is hoped that this paper can provide a new idea for the surface modification of aluminum.
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
Journal of Environmental Sciences
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2022
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IF 6.796
Linjun Li,Jinsuo Lu,Heliang Pang,Zhiqiang Zhang,Jing Yang,Pengpeng Li,Xiaoyu Yan,Miaomiao Fan
Scale not only affects the taste and color of water, but also increases the risks of osteoporosis and cardiovascular diseases associated with drinking it. As a popular beverage, tea is rich many substances that have considerable potential for scale inhibition, including protein, tea polyphenols and organic acids. In this study, the effect of tea brewing on scale formation was explored. It was found that the proteins, catechins and organic acids in tea leaves could be released when the green tea was brewed in water with sufficient hardness and alkalinity. The tea-released protein was able to provide carboxyl groups to chelate with calcium ions (Ca 2+ ), preventing the Ca 2+ from reacting with the carbonate ions (CO 3 2− ). The B rings of catechins were another important structure in the complexation of Ca 2+ and magnesium ions (Mg 2+ ). The carboxyl and hydroxyl groups on the organic acids was able to form five-membered chelating rings with Ca 2+ and Mg 2+ , resulting in a significant decrease in Ca 2+ from 100.0 to 60.0 mg/L. Additionally, the hydrogen ions (H + ) provided by the organic acids consumed and decreased the alkalinity of the water from 250.0 to 131.4 mg/L, leading to a remarkable reduction in pH from 8.93 to 7.73. It further prevented the bicarbonate (HCO 3 − ) from producing CO 3 2− when the water was heated. The reaction of the tea constituents with the hardness and alkalinity inhibited the formation of scale, leading to a significant decrease in turbidity from 10.6 to 1.4 NTU. Overall, this study provides information to help build towards an understanding of the scale inhibition properties of tea and the prospects of tea for anti-scaling in industrial applications.
研究领域:
食品科学
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化学
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DOI
PubMed
高影响因子
Foods
·
2024
·Vol. 13
·期 10
·1447
·
IF 4.7
Haijun Chang,Yu Hu,Yuanwei Shi,Jie Xiong,Zhaoying Bo
This study aimed to investigate the effect ofGnaphalium affineextract (GAE) (0.04, 0.2 and 1 mg/g protein) on the gel properties of porcine myofibrillar proteins (MPs) in a simulated Fenton oxidation system, using tea polyphenols (TPs) at similar concentrations of 0.04, 0.2, and 1 mg/g protein, respectively, as a contrast. The findings revealed that as the TP concentration increased, the water retention of MP gels decreased significantly (p< 0.05). In contrast, MP gels containing medium and high concentrations of GAE exhibited significantly higher water retention than those with low concentrations of GAE (p< 0.05). When the concentration of GAE was increased to 1 mg/g protein, the strength of MP gels was significantly reduced (p< 0.05) by 33.32% compared with the oxidized control group, suggesting that low and medium GAE concentrations support MP gel formation. A texture profile analysis indicated that an appropriate GAE concentration improved gel structure and texture. Dynamic rheological characterization revealed that low concentrations of TP (0.04 mg/g protein) and low and medium concentrations of GAE (0.04 and 0.2 mg/g protein) strengthened the protein gel system. Conversely, high concentrations of TP and GAE (1.0 mg/g protein) damaged the protein gel system or even promoted the collapse of the gel system. Scanning electron microscopy revealed that higher TP concentrations disrupted the gel, whereas low and medium GAE concentrations maintained a more continuous and complete gel network structure compared with the oxidized control group. This indicates that an appropriate GAE concentration could effectively hinder the destruction of the gel network structure by oxidation. Therefore, based on the obtained results, 0.2 mg/g protein is recommended as the ideal concentration of GAE to be used in actual meat processing to regulate the oxidization and gel properties of meat products.
研究领域:
食品科学
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生物化学
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DOI
PubMed
高影响因子
ACS Food Science & Technology
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2024
·
IF 2.6
Danya Zhan,Qiongfen Yu,Ming Li,Ying Liu,Shengnan Sun,Rong Zhu,Run Zhang,Zhongfan Mo,Runfang Ma
Utilizing biological resources facilitates alleviating energy shortage and environmental pollution problems. This work aims to develop edible packaging material that performs well and can be used for fresh fruit preservation. Tea polyphenol (TP) was successfully added to a composite-forming solution of tobacco stem cellulose (TSC) and xanthan gum (XG) to synthesize greenly the TSC/XG/TP composite film. Subsequently, the effects of TP dosage on the physicochemical and functional properties of TSC/XG/TP composite films were systematically evaluated. Results showed that the tensile strength (7.89 MPa) and elongation at break (5.27%) were maximums when the optimum TP dosage of 0.4% composite film was achieved. In addition, water vapor and oxygen barrier properties were increased by 159.57 and 7.50%, respectively, and the antioxidant activity was also enhanced by 251.59%. The composite film could maintain the strawberries’ appearance excellently and effectively inhibit color deterioration, thereby delaying postharvest decay, weight loss, and softening. It naturally follows that strawberries’ freshness is prolonged up to 14 days. Practical applications of composite films in preserving fresh strawberries have also shown positive results, making it possible as a potential food packaging material.
研究领域:
材料科学
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食品科学
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植物学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
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IF 4.9
Liya Fan,Xiaoxuan Xi,Xiaoyan Zhao,Xiao Zhu
The method of adding additives at once not only increases costs, but also poses a risk of excessive consumption. Therefore, the slow-release technology was employed for improving the utilization efficiency and edible safety of additives in this work. The poly (N-isopropylacrylamide) (PNIPAM) and polylactic acid (PLA) composite hydrogels with sheath-core structure were fabricated by in-situ spinning method. The mechanical bearing capacity of PNIPAM hydrogel was improved by controlling the structure of PLA electrospun fiber membrane. The results showed that the compression resistance of the samples coated with PLA was increased 931 % at 50 % deformation. In addition, the surface wettability of samples was studied to ensure the stable water permeability. The composite hydrogel was used for the sustained release of tea polyphenol (TP) antioxidant. The release effect of TP at different temperatures, and radical scavenging effect of 2, 2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and 2-Phenyl-4,4,5,5-tetraMethyliMidazoline-3-oxide-1-oxyl) (PTIO) were investigated. It was found that the release rate for TP could reach to 77.8 % at 30 °C. The radical clearance rates of ABTS and PTIO were 99.2 % and 46.6 %, respectively. This work provides effective ideas for the use of antioxidants in food preservation processes.
研究领域:
食品科学
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材料科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Jian Xu,Jiuyun Cui,Haotian Sun,Yuting Wu,Changguo Xue,Atian Xie,Chengcai Li
Facile preparation of hydrophilic membranes is essential for achieving efficient separation of oil-water emulsion. In this paper, a hydrophilic PVDF@TP membrane was prepared by very simple direct modification using green tea (The main extract is tea polyphenols, TP). The PVDF@TP membrane exhibits good hydrophobicity in air and underwater superoleophilicity. The oil-water separation potential of this membrane was studied using several model oil-in-water emulsions. The resulting membrane exhibitd high separation efficiency (above 99 %) and separation fluxes (955–1672 L m −2 h −1 bar −1 ) for various oil-in-water emulsions. Additionally, separation efficiency of PVDF@TP membrane was still above 98 % even after 10 times continuous separation, demonstrating its good antifouling ability and stability. In addition, bending, ultrasonic and stirring treatments showed that the membrane has good mechanical durability. In view of the advantages of facile preparation, economy and high-performance, the hydrophilic PVDF@TP membrane has a very broad application potential in industrial oily wastewater and oil spill treatment.
研究领域:
材料科学
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环境工程
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DOI
高影响因子
RSC Advances
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2022
·Vol. 12
·期 33
·21135-21144
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IF 4.036
Yirong Xia,Wei Ni,Xintong Wang,Yanyan Wang,Ximing Huang
The health benefits of drinking tea stem from it being rich in polyphenols and other physiologically-active substances. Thus, exploring the synergistic effect between polyphenols and a variety of physiologically-active substances can contribute to our understanding of how tea benefits health. In this work, we have studied the interactions between catechin and theanine, exploring the synergetic antioxidant mechanism of the two molecules. Electrochemical characterization results showed that the oxidation peak current of catechin decreased gradually with the concentration of theanine, which is due to theanine spontaneously binding to catechin through intermolecular hydrogen bonds and forming molecular clusters via two hydrogen bonds. The binding constant is 4.75 at room temperature. The molecular clusters reduce the diffusion coefficient of catechin in solution, leading to the slow release of its antioxidant capacity (ability to effectively inhibit free radical oxidation reactions). Density functional theory calculations were also performed and verified the binding behavior. In identifying the synergistic effect between catechin and theanine on the antioxidant capacity of tea, this study adds to our understanding of the efficacy of tea polyphenols.
研究领域:
食品科学
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生物化学
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DOI
高影响因子
Biomimetics
·
2025
·Vol. 10
·期 3
·149
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IF 3.9
Ziwei Wu,Zhipeng Li,Yixiao Li,Haoyu Wang,Jiang Yue,Tieling Xing
Although many tissue adhesives with good biocompatibility are currently available, their lack of wet adhesion capacity significantly hinders their clinical application. Therefore, further development and exploration of new medical adhesives are necessary. Inspired by the adhesion mechanism of marine mussels, through modifying gelatin protein with gallic acid (GA) for wet adhesion and cross-linking gelatin (Gel) molecular chains with tea polyphenols (TP), the adhesive TP-GA/Gel was developed. The adhesive exhibited an adhesion strength of up to 130.47 kPa to porcine skin tissues and maintained a high adhesion state in various aqueous environments, demonstrating excellent and reproducible adhesion. Additionally, TP-GA/Gel possessed outstanding antimicrobial, antioxidant, and biocompatibility properties. In an in vivo wound healing study with SD rats, the wound area treated with TP-GA/Gel adhesive decreased from 10.3 mm2to 0.9 mm2after 15 days, promoting effective and scarless wound healing. These results highlight the promising clinical potential of TP-GA/Gel as a medical adhesive.
研究领域:
生物材料学
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医学工程
·
仿生学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）