Analytical Methods
·
2016
·Vol. 8
·期 48
·8474-8482
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IF 1.915
Yudong Gao,Lu Wang,Yulong Zhang,Lina Zou,Gaiping Li,Baoxian Ye
A sensitive voltammetric sensor for gallic acid was fabricated by using a poly(diallyldimethylammonium chloride) (PDDA)-functionalized graphene supported platinum nanoparticle nanocomposite (PDDA–GR–Pt) modified glassy carbon electrode. The nanocomposite was characterized using UV-vis spectra, transmission electron microscopy (TEM) and X-ray diffraction (XRD). This voltammetric sensor exhibited an excellent electrochemical response for gallic acid. The electrode process of gallic acid was investigated in detail and some dynamics parameters were calculated. Under optimum conditions by square wave voltammetry (SWV), a good linear relationship was obtained between peak currents and gallic acid concentrations in the wider range of 3 × 10−8 to 1 × 10−6 mol L−1 with a lower detection limit of 7 × 10−9 mol L−1 (S/N = 3). In addition, the proposed voltammetric method was successfully applied to test gallic acid in real samples with good results.
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Heliyon
·
2024
·
IF 3.4
Mengjia Zhu,Shiqin Liu,Huijuan Bai,Yuxiang Huang,Yanglun Yu,Wenji Yu
Currently, the quest for bamboo materials with high color fastness, rich colors and environmental friendliness is rapidly rising due to its potential applications in construction, furniture and decoration. However, finding an easy-to-operate and environmentally friendly dye for bamboo is a necessary task because of the difficulty in treating the dyeing waste liquid of acid dyes and the complexity of the production process of reactive dyes.Five formulations involving metal polyphenol complexes were employed to straightforwardly produce eco-friendly dyed bamboo and the impact of various formulations on the light aging resistance of the dyed veneers was examined. The results indicated that the light resistance of bamboo veneer dyed with the solution containing only FeSO 4 ·7H 2 O and tannic acid reached level 4, surpassing the undyed bamboo veneer by three levels. The mechanism of enhanced lightfastness of dyed bamboo veneer was elucidated by XPS analysis. The polyphenol iron complex serves a dual purpose: it absorbs ultraviolet rays and scavenges free radicals within the system. Additionally, it reduced the oxidation of phenolics in the substrate, transforming them into dark-colored quinone structures. This process enhanced the light-aging resistance of the finishing materials. Therefore, this work provides a simple and environmentally friendly method for changing the color of bamboo and provides a new idea for the selection of dyes for bamboo dyeing in actual production.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Miral Javed,Yanqun Xu,Haixin Sun,Huang Hao,Dong Li,Anam Matloob,Yan Xiaowei,Zisheng Luo
Lately, emulsions with low-fat and natural stabilizers are predominant. This study extracted the nano cellulose crystals (NCs) from Camellia Oleifera shells, and their gallic acid (GA) conjugates were synthesized by free-radical grafting. Pickering emulsions were prepared using NCs 1 %, 1.5 %, 2.5 %, and gallic acid conjugates NC-GA1, NC-GA2, and NC-GA3 as stabilizers. The obtained nano cellulose crystals exhibited 18–25 nm, −40.01 ± 2.45 size, and zeta potential , respectively. The contact angle of 83.4° was exhibited by NC-GA3 conjugates. The rheological, interfacial, and microstructural properties and stability of the Pickering emulsion were explored. NC-GA3 displayed the highest absorption content of 79.12 %. Interfacial tension was drastically reduced with increasing GA concentration in NC-GA conjugates. Rheological properties suggested that the low-fat NC-GA emulsions showed a viscoelastic behavior , increased viscosity, gel-like structure, and increased antioxidant properties. Moreover, NC-GA3 displayed reduced droplet size and improved emulsion temperature and storage stability (28 days) against phase separation. POV and TBARS values were reduced with the NC-GA3 ( P < 0.05). This work confirmed that grafting phenolic compounds on NCs could enhance bioactive properties, which can be used in developing low-fat functional foods. NC-GA conjugates can potentially fulfill the increasing demand for sustainable, healthy, and low-fat foods.
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FOOD CHEMISTRY
·
2024
·
IF 8.5
Dong Cai,Xinmiao Wang,Qian Wang,Peiyong Tong,Weiyuan Niu,Xu Guo,Jinghan Yu,Xuan Chen,Xiaoyang Liu,Dayong Zhou,Fawen Yin
The freeze-drying approach was used to create inclusion complexes utilizing alkyl gallates and β-cyclodextrin, namely dodecyl gallate, octyl gallate, butyl gallate, and ethyl gallate, which are exemplary examples of phenolic esters. The everted-rat-gut-sac model demonstrated that the inclusion complexes released alkyl gallates, which were subsequently hydrolyzed to generate free gallic acid, as evidenced by HPLC-UV analysis. Both gallic acid and short-chain alkyl gallates were capable of permeating the small intestinal membrane. The transport rate of gallic acid (or alkyl gallates) exhibited an initial rise followed by a drop when the carbon-chain lengths varied. The inclusion complex groups exhibited a superior sustained-release effect compared to the comparable alkyl gallates groups, thus possibly leading to higher bioavailability and stronger bioactivity. Moreover, altering the length of the carbon chain will allow for the effortless achievement of regulated release of phenolic compounds and short-chain phenolic esters from such β-cyclodextrin inclusion complexes.
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REACTIVE & FUNCTIONAL POLYMERS
·
2024
·
IF 4.5
Kehao Fan,Quanling Zhao,Meiyi Zou,Zhiyong Qin,Xiaoyu Peng
In this paper, a new green method for preparing multifunctional chitosan-based aerogels was prepared by using natural plant polyphenols instead of traditional chemical crosslinking agents. The aerogel was crosslinked by a Schiff base reaction between chitosan and cellulose aldehyde, and then functionalized with gallic acid to enhance the structure and endow antibacterial properties. The aerogel displayed a three-dimensional, cross-linked porous structure and exhibited selective adsorption of anionic dyes. The theoretical maximum adsorption capacity of amaranth was 450.89 mg/g. The adsorption process is more consistent with the pseudo-second-order kinetic model and the Langmuir isotherm model, indicating that the adsorption process is monolayer chemical adsorption. The aerogel exhibited superior adsorption performance at a pH value of 4, with the adsorption mechanism predominantly being electrostatic adsorption. The maximum inhibition zones of the aerogels on E. coli and S. aureus were 19.8 mm and 16.8 mm, respectively, and the adsorption value of Cr (VI) was greater than 160 mg/g. The chitosan-based aerogel proposed in this paper may be a promising material for treating complex wastewater containing dyes and heavy metals.
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CARBOHYDRATE POLYMERS
·
2024
·
IF 10.7
Lihua Li,Li Ren,Qiuhan Zhao,Ke Xu,Qiushuang Wu,Qianru Su,Xin Li,Xin Lü,Li Wang
The management of wounds infected with drug-resistant bacteria represents a significant challenge to public health globally. Nanotechnology-functionalized photothermal hydrogel with good thermal stability, biocompatibility and tissue adhesion exhibits great potential in treating these infected wounds. Herein, a novel photothermal hydrogel (mCS-Cu-Ser 1 ) was prepared through in situ mineralization in the hydrogel networks and ion cross-linking driven by copper ions (∼3 mM). Self-assembling polyphosphate sericin nanoparticles (Ser NPs) formed by an ultrasound-assisted anti-solvent method were as mineralization templates and gallic acid-grafted chitosan (mCS) was prepared as the sole matrix. Grafting of polyphenols and cross-linking of copper ions endowed mCS-Cu-Ser 1 with injectable, skin-adhesive and self-healing characteristics. Due to the nonradiative relaxation of Cu 2+ electron-hole pairs of copper phosphate on the surface of Ser NPs and the molecular thermo-vibrational effect of the mCS-Cu complex, mCS-Cu-Ser 1 rapidly warmed up to 50 °C within one minute under near-infrared (NIR) irradiation. Integrating such excellent photothermal properties with antimicrobial activity and intracellular reactive oxygen species scavenging from mCS, mCS-Cu-Ser 1 + NIR effectively accelerated methicillin-resistant Staphylococcus aureus (MRSA) infected wound healing. This work develops a novel dressing for the treatment of MRSA-infected wounds and provides some reference for the preparation of multifunctional acid-free chitosan hydrogels.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Shuqi Zhang,Jing Yi,Xuanxuan Yuan,Zhilong Zhang,Zhongguo Shan,Haihua Wang
The development of environmentally friendly biodegradable films is urgently required for reducing the plastic pollution crisis and ensuring food safety. Thus, here we aimed to prepare ZIF-8 that has delivery ability for gallic acid (GA) and further incorporated this material (GA@ZIF-8) into carrageenan (CA) matrix to obtain a series of CA-GA@ZIF-8 films. This design significantly improved the mechanical strength and UV barrier and reduced water vapor permeability, moisture content , and swelling rate of the CA films. CA-GA@ZIF-8 films exhibited sustainable release of GA and controlled migration of Zn 2+ up to 144 h in a high-fat food simulator. Also, the composite films performed high-efficiency antioxidant activities (83.29 % for DPPH and 62.11 % for ABTS radical scavenging activity) and 99.51 % antimicrobial effects against Escherichia coli O157:H7 after 24 h. The great biocompatibility of GA@ZIF-8 and CA-GA@ZIF-8-10 % was confirmed by hemolysis, cell cytotoxicity, and mice model. Finally, the preservation experiments showed that CA-GA@ZIF-8 films could effectively maintain freshness and reduce the growth of microorganisms and oxidation of lipids during the preservation of beef. These results suggest that CA-GA@ZIF-8 films hold promising potential for improving the quality preservation of beef.
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Environmental Science-Processes & Impacts
·
2025
·Vol. 27
·期 2
·453-462
·
IF 3.9
Situ Mu,Qi Yang,Chenxu Yan,Tong Xu,Jing Zhang,Junjun Ma,Chun Liu
Trivalent chromium (Cr3+) is a heavy metal widely present in tannery wastewater, and organic ligands represented by gallic acid (GA) have significant effects on the environmental behavior of Cr3+. This study explored the binding process of Cr3+ with GA through the integration of ultraviolet-visible (UV-vis), Fourier transform infrared (FTIR), and fluorescence spectroscopy coupled with two-dimensional correlation analyses (2DCOS). UV-vis results showed that the average molecular weight of the solutions gradually increased with the addition of Cr3+ ions. The vibration of FTIR characteristic peaks indicated that the hydroxyl and carboxyl functional groups of GA were complexed with Cr3+ ions. On the basis of the fluorescence quenching of GA after the addition of Cr3+ ions, the complexation coefficient was calculated as 4 × 104. 2DCOS and nuclear magnetic resonance (NMR) spectra demonstrated the binding sequence of GA with Cr3+ as meta-hydroxyl groups → carboxyl groups → para-hydroxyl groups, and heterospectral 2DCOS showed that the intensity change in UV-vis absorption bands occurred before that in IR absorption bands. Density functional theory (DFT) was used to quantify the binding energy of GA with Cr3+ at different binding sites, and it was shown that the binding energy of the meta-hydroxyl group was the lowest. Overall, this study provides a new approach to the analysis of the molecular structure of complexes and the binding process between organic ligands and metal ions in wastewater.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Biaobiao Yan,Xiaoting Liao,Tianlei Sun,Leilei Wu,Zhenfei Guo,Man Zhou,Yuanyuan Yu,Qiang Wang,Chaobin He,Ping Wang
Achieving multifunctional integration with comfortability and durability comparable to conventional textiles is one of the ultimate pursuits of personal protective wearables. Herein, a multi-protective textile with breathable, moisture-permeable and washable properties is reported, which is realized by cross-linking of electroactive MXene@gallic acid (MG) with the cationized cotton. Cationic modification reduces the charge repulsion between MG and cotton fibers, and promotes the deposition of conductive media on textile surface. After borax (STB) cross-linking, the obtained textile exhibits superior service stability and can be subjected to conventional washing, exhibiting antioxidant stability during natural storage. Importantly, the cross-linked textile inherits the properties of good breathability, softness and bendability as the original fabric. With the outstanding conductivity (260 mS/cm) and high absorptivity of the solar spectrum (0.920), the textile was used for Joule heating and solar heating, demonstrating their potential in the field of thermal management. Meanwhile, the textile demonstrates excellent antibacterial activity against Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus , and maintained satisfactory antibacterial effect (>90 %) even after ten washing cycles. This facile strategy for fabricating personal protective textiles, based on cross-linking cotton fiber with electroactive mediators offers favorable durability, comfortability and multifunctionality, providing a scalable and sustainable approach for manufacturing multi-protective wearables.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2017
·
IF 2.843
Mingjin Fan,Chaoyang Zhang,Ping Wen,Wenjing Sun,Rui Dong,Desuo Yang,Weimin Li,Feng Zhou,Weimin Liu
Synthesis, characterization, and evaluation of a series of gallate derivatives as lubricant base stocks are described. The gallate derivatives were synthesized via sequential esterification and alkylation reactions from biorenewable raw material gallic acid. All the synthesized gallate derivatives were structurally characterized by using NMR, IR, and HRMS spectral data. Their physicochemical and lubricating properties including density, viscosity, viscosity index, pour point, flash point, volatility, corrosion level, thermal and oxidation stability, and friction-reducing and antiwear properties were systematically investigated. On the basis of the physicochemical and lubricating data, it can be concluded that gallate derivatives have good properties in terms of viscosity–temperature characteristics, corrosion ability, volatility, and low-temperature flow ability. More important, they have predominant thermal and oxidation stability, as well as high-temperature friction-reducing and antiwear performances compared with the existing synthetic ester oils. These favorable technical performances together with their biological available resources recommend gallate derivatives as excellent base stocks for the development of high-performance green lubricant products.
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Biomaterials Science
·
2022
·Vol. 10
·期 23
·6836-6849
·
IF 7.59
Wei Gong,Hai-bo Huang,Xin-chuang Wang,Wan-ying He,Yi-yang Hou,Jiang-ning Hu
The purpose of this study is to provide a new strategy for constructing a temperature-controlled hydrogel as a promising agent for wound healing using natural products through physical co-assembly. Herein, the temperature-controlled physically assembled hydrogel consisting of gallic acid and lysozyme (GL) could be co-assembled into a regular fibrous structure accompanied by strong blue fluorescence with three-dimensional networks at micron levels through hydrophobic interactions, π–π interactions and hydrogen bonding. This GL hydrogel has excellent temperature sensitivity and self-healing properties, as proved by cycle high-low temperature tests. In addition, it possesses stable rheological properties, great sustained release ability, and could realize the spatiotemporal delivery of gallic acid and lysozyme. Biocompatibility and antibacterial tests proved that this well-assembled GL hydrogel has no cytotoxicity but excellent antibacterial activity. Both in vitro and in vivo experiments demonstrated that the GL hydrogel has excellent anti-inflammation efficiency and promotes the healing of chronic wounds by suppressing the expression of pro-inflammatory related genes. Tests using an E. coli-infected wound model confirmed that the GL hydrogel could terminate the inflammatory phase early and ultimately promote the healing of wounds infected by E. coli. This study provides a promising strategy for the effective treatment of wounds through a physical self-assembled hydrogel.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Lan Yu,Yiyang Shen,Jing Jin,Diya Zhang,Ruitong Wan,Jianan Song,Wei Dong,Chen Dong,Shengye You
Diabetic oral ulcers present significant therapeutic challenges due to bacterial infections, oxidative stress, and impaired angiogenesis, often leading to delayed healing. To address these limitations, we developed a multifunctional hydrogel patch (abbreviated as DCP1) composed of dialdehyde xanthan gum, carboxymethyl chitosan, and poly(gallic acid) (PGA) nanoparticles. DCP1 synergistically integrates rapid hemostasis, antimicrobial activity, reactive oxygen species (ROS) scavenging, and pro-angiogenic properties. The Schiff base-crosslinked hydrogel exhibits a porous structure, injectability, and self-healing behavior, while PGA nanoparticles enhance ROS neutralization (66.7 % scavenging efficiency) and antioxidant cellular protection. In vitro studies demonstrated DCP1’s potent antibacterial efficacy (>99 % inhibition against S. aureus and E. coli ), biocompatibility (93.2 % cell viability), and hemocompatibility (<5 % hemolysis). In diabetic rat models, DCP1 accelerated ulcer closure by suppressing inflammation (reduced interleukin-6 expression) and promoting angiogenesis (elevated platelet endothelial cell adhesion molecule-1 levels), achieving near-complete healing within seven days. Systemic biosafety assessments confirmed minimal toxicity, supporting its clinical potential. This natural polysaccharide-based hydrogel offers a comprehensive therapeutic strategy for diabetic oral ulcers, addressing multifactorial pathology and outperforming conventional treatments.
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