INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2020
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IF 5.162
Wenru Liu,Jun Mei,Jing Xie
In this study, the microbiological, physicochemical, and flavor changes of turbot ( Scophthalmus maximus ) coated with a composite active coating of locust bean gum (LBG) and sodium alginate (SA) supplemented with daphnetin emulsions (0.16, 0.32, 0.64 mg·mL −1 ) were determined during 18 days of refrigerated storage (4 ± 1 °C). Results showed that LBG-SA coatings containing 0.32 mg·mL −1 daphnetin emulsions could significantly lower the total viable count (TVC), psychrophiles , Pseudomonas spp. and H 2 S-producing bacteria counts , and inhibit the productions of off-flavor compounds including the total volatile basic nitrogen (TVB-N), trimethylamine (TMA) and ATP-related compounds. 32 volatile compounds were identified by solid phase microextraction combined with gas chromatography-mass spectrometer method (SPME-GC/MS) during refrigerated storage and the treated turbot samples significantly lowered the relative content of fishy flavor compounds. Further, the LBG-SA coatings containing daphnetin could also delay the myofibril degradation of the turbot samples. These results indicated that the LBG-SA coatings with 0.32 mg·mL −1 daphnetin were a potential alternative way to improve the quality of turbot during refrigerated storage.
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ACS Omega
·
2021
·
IF 3.512
Abdelazeem S. Eltaweil,Injy M. Mamdouh,Eman M. Abd El-Monaem,Gehan M. El-Subruiti
Herein, we report a new metal–organic framework (MOF)-based composite beads adsorbent made via incorporating UiO-66 MOF, carboxylated graphene oxide (GOCOOH) into sodium alginate for efficient removal of methylene blue dye, and Cu2+ ions. The successful fabrication of the synthesized UiO-66/GOCOOH@SA composite beads was confirmed by means of X-ray diffraction, Fourier transform infrared, scanning electron microscopy, zeta potential, X-ray photoelectron spectroscopy analysis, and thermogravimetric analysis and BET measurement. The incorporation of both UiO-66 and GOCOOH into SA beads greatly increased their adsorption efficiency for the removal of both MB and Cu2+ with maximum adsorption capacities of 490.72 and 343.49 mg/g, respectively. The removal process of both MB and Cu2+ follows the pseudo-second-order model and Freundlich isotherm model. A plausible adsorption mechanism was discussed in detail. Regeneration tests clarified that the removal efficiencies toward both MB and Cu2+ remained higher than 87% after five cycles. These results reveal the potentiality of UiO-66/GOCOOH@SA beads as an excellent adsorbent.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 25
·期 21
·21058-21069
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IF 2.8
Wang Ziyang,Wang Yan,Yu Cong,Zhao Yanxia,Fan Meixia,Gao Baoyu
In this study, a modified sodium alginate (MSA) composited with TiCl 4 was used to treat the synthetic Ag nanoparticles (AgNPs) water in coagulation-ultrafiltration process. The floc properties and membrane fouling of TiCl 4 and MSA composite coagulants (TiCl 4 + MSA) were investigated by a laser diffraction instrument and ultrafiltration fouling model. The recycle of the AgNP-containing flocs was evaluated by XRD and photocatalytic experiments. The results showed that TiCl 4 + MSA could achieve better coagulation performance than TiCl 4 alone with AgNP and DOC removal up to 97 and 59% at the optimum condition (pH = 5 and dosage = 12 mg TiCl 4 /L). TiCl 4 + MSA produced larger and looser flocs than TiCl 4 and TiCl 4 + SA composite coagulant (TiCl 4 + SA), which was benefit for the inhibition of subsequence membrane fouling. The strongly attached external fouling resistance ( R ef-s ) and the reversible internal fouling resistance ( R if-r) of TiCl 4 + MSA were only 43 and 39.2% of those achieved by TiCl 4 at the optimal coagulation condition. Besides, the adopted AgCl-TiO 2 could be recycled from AgNP-containing flocs. And MSA could promote the form of TiO 2 anatase. It gives us a possible way for silver nanoparticle recycle.
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CHEMICAL ENGINEERING JOURNAL
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2019
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IF 8.355
Liqing Li,Jinghua Zhao,Yiran Sun,Fei Yu,Jie Ma
Double-network gel is composed of two kinds of crosslinked organic/inorganic networks, which has a good prospect of environmental application and its application in the antibiotic removal has important practical significance. Novel polysaccharide-based double-network gel bead (SK) with low-swelling, enhanced mechanical properties and excellent adsorption capacity of ciprofloxacin hydrochloride (CIP) was prepared via a facile ionically cross-linking method. Mechanical properties tests and swelling experiments showed that the sorbent has an enhanced mechanical property with stress of 1.07 MPa and an elastic modulus of 1.3 MPa at 90% strain and a reduced swelling property compared to a single ĸ-CG/Ca 2+ network. The adsorption performances of SK gel for CIP were investigated by changing the ratio of raw materials, crosslinking agent concentration, adsorbent dosage, contact time, temperature, pH, and pollutant concentration systematically. The above studies indicated that the maximum adsorption capacity of 291.6 mg/g was obtained at pH = 5.1. The kinetic datas were well fitted to the pseudo-second-order model, indicating that chemical sorption was the rate-limiting step. The isotherm of adsorption could be described by the Langmuir-Freundlich model well, which showed that SK gel had heterogeneous surface and different binding sites. By analyzing FT-IR spectroscopy and the adsorption changes under different pH, the adsorption mechanism may be explained by hydrogen bonding and the electrostatic interactions between CIP and the adsorbent. This study highlighted that SK gel beads could be used as a promising adsorbent for the large-scale removal of CIP in aqueous solutions, and the research will be conducive to address CIP pollution efficiently.
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Nanoscale
·
2017
·Vol. 9
·期 34
·12533-12542
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IF 7.367
Cheng Gao,Fan Tang,Guiyi Gong,Jianxiang Zhang,Maggie P. M. Hoi,Simon M. Y. Lee,Ruibing Wang
In order to realize a combination of chemotherapy and selective drug release into tumor cells, novel pH-sensitive prodrugnanoparticles were designed and prepared via the self-assembly of a synthetic amphiphilic macromolecular prodrug for the selective co-delivery of doxorubicin (Dox) and curcumin (Cur). Dox was covalently conjugated to the oxidized sodium alginate through a Schiff base reaction to produce an amphiphilic macromolecular prodrug, and the prodrug was subsequently self-assembled into nanoparticles (Dox-NPs) in an aqueous solution, which were responsive to the acidic environment in tumor cells. Additionally, a second chemotherapeutic agent, Cur, was encapsulated in the core of nanoparticles (Cur–Dox-NPs) via hydrophobic effects, with a significant drug loading capacity. Cur–Dox-NPs exhibited an efficient release of both Dox and Cur in acidic media and further studies of their intracellular uptake and drug release confirmed that Dox-NPs were easily taken up by cells and selectively released the drug into the human breast cancer cell line MCF-7. In vitro cytotoxicity studies of the NPs showed a remarkable efficacy against MCF-7 cell lines, whereas an improved safety profile was observed in the human breast epithelial cell line MCF-10A. Furthermore, in vivo studies in zebrafish further confirmed an efficient absorption of Dox-NPs. In vivo cardiotoxicity experiments on a zebrafish model showed that Dox-NPs exhibited an improved cardiotoxicity profile in comparison with free Dox. This study demonstrated that this novel pH-sensitive prodrug-nanoparticle system may provide a simple and efficient platform for the selective co-delivery of multiple drugs to tumor cells.
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POLYMER DEGRADATION AND STABILITY
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2016
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IF 3.12
Qingfeng Zhou,Yanfeng Liu,Gaobo Yu,Furui He,Kai Chen,Dunchao Xiao,Xinyu Zhao,Yuhong Feng,Jiacheng Li
Sono-photo-Fenton, sono-Fenton and photo-Fenton methods combined with heterogeneous TiO 2 nanoparticles are adopted to investigate the degradation of sodium alginate (NaAlg), and the kinetics mechanism is also explored. Experimental results suggest that the reaction order of NaAlg degradation ( n ) is 0.51 and the extent of photocatalytic degradation can increase with the loading of TiO 2 nanoparticles. Meanwhile, as the catalyst concentration increases from 0.05 to 0.5 gL −1 , the degradation rate constant ( k ) is decreased. In addition, the structure of degraded NaAlg is characterized by Fourier transform infrared (FT-IR), 1 H NMR spectroscopy, and X-ray diffraction analyses. The FT-IR and 1 H NMR spectra results indicate that the C2-C3 bond in the structure of NaAlg is broken and intra-molecular esters are formed during the degradation process due to the strong oxidization of the Fenton system. In general, the sono-photo-Fenton process with TiO 2 nanoparticles could provide an efficient way to degrade the NaAlg to low-molecular-weight.
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INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Ru Zhang,Chengfeng Wu,Wenyan Yang,Chunhuai Yao,Yidan Jing,Ningya Yu,Shengpei Su,Sakil Mahmud,Xiaomin Zhang,Jin Zhu
Cellulose-based hydrogel electrolytes have important application prospects in flexible solid-state supercapacitors due to the renewability and high toughness of their raw materials. Currently, cellulose-based hydrogel electrolytes are generally prepared by a bottom-up strategy, which also has poor mechanical properties and low capacitance of the hydrogel electrolytes. These issues need to be further solved. Herein, employed an innovative top-down fabrication approach, utilizing meticulously organized delignified wood as a structural framework, and concurrently integrated polyacrylamide (PAM) and sodium alginate (SA) within this framework, creating a continuous conductive network. Furthermore, multi-walled carbon nanotubes (CNTs) have been introduced as conductive additives. This addition has imparted substantial mechanical robustness and exceptional electrical performance to the wood-based hydrogel. When the concentration of CNTs in the hydrogel precursor solution is 10 mg/ml, the resulting hydrogel electrolyte, denoted as CWH-10, demonstrates a remarkable enhancement in both mechanical strength and electrical conductivity compared to hydrogels modified using conventional techniques. This straightforward fabrication method presents an innovative and promising approach for producing high-strength, bio-based hydrogel electrolytes, with potential applications spanning various fields.
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INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
·
2024
·Vol. 59
·期 8
·5430-5439
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IF 2.6
Hao Cheng,Pengcheng Zhou,Jun Mei,Jing Xie
Summary The quality of fish is easily damaged during the frozen process, and the ice glazing technology can better maintain the quality of frozen fish. However, the traditional ice glazing technology is not yet stable and some of the properties need to be improved. This research optimised ice glazing technology by adding different antioxidants to the traditional ice glazing, which improved the stability of the ice glazing and lessened the dry consumption of mackerel during frozen storage. The lipid oxidation and protein denaturation of mackerel were inhibited with the addition of antioxidants to the ice glazing, the freshness of mackerel was maintained better, and the production of histamine was also decreased during frozen storage. It was found that the ice glazing with the addition of antioxidant bamboo leaves (AOB) had better water retention, lower TVB-N value, and histamine content compared to the addition of theaflavins (TF) and sodium isovitamin (VC). Moreover, the sample treated by the ice glazing with AOB showed less lipid oxidation and protein denaturation. Therefore, ice glazing with the addition of AOB could be an optional method for relieving the quality deterioration of mackerel during frozen storage. This research also provides insights into the coupling of antioxidants and ice-coating techniques.
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POLYMER COMPOSITES
·
2024
·
IF 4.8
Yunhuan Wu,Guipeng Quan,Bao Gong,Weiwen Li,Shengtao Dai,Daimei Li,Yuhui Ao,Linghan Xiao,Yujing Liu
The interface between carbon fiber (CF) and the resin matrix is of paramount importance in determining the overall performance of composite materials. This study employed ammonium ceric nitrate (ACN), sodium alginate (SA), and aminated carbon nanotubes (CNTs) to fabricate “hard-soft-hard” nanostructure on the surface of CFs with the aim of enhancing the interfacial properties of the composites. The results indicated that interlaminar shear strength (ILSS), interfacial shear strength (IFSS), flexural strength, and modulus of the composites demonstrated a respective increase of 31.0%, 51.8%, 44.3%, and 85.3% following the modification process. The observed positive outcome can be ascribed to the creation of “hard-soft-hard” nanostructures achieved by the combination of ACN, SA, and CNTs through both hydrogen and covalent bonding. The nanostructures serve to augment the surface chemical activity of the fibers and amplify the specific surface area, thereby facilitating enhanced mechanical interlocking between the fibers and the resin. Furthermore, the composites of CF prepared through this method demonstrate outstanding mechanical characteristics, rendering them appropriate for the construction of longer-lasting and more resilient wind turbine blades. Highlights ACN, SA, and CNT create a “hard-soft-hard” multi-phase structure. ACN/SA/CNT synergistically enhances composite interfacial bonding. Inorganic–organic–inorganic materials on CF form novel interfacial phases. Resultant structure improves composite interface properties.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yajuan Hu,Xieraili Maimaitiyiming
The increasing demand for environmentally friendly performance materials in the field of wearable electronics has brought renewable and low-cost hydrogels based on natural polymers into the research spotlight. As a biodegradable natural polymer, sodium alginate (SA) shows great promise for applications in wearable electronics. Here, we report a hydrogel with printability, adhesion, and is highly stable based on gelatin (Gel) and SA. SA improves the viscosity of the hydrogel, which can bond iron products weighing up to 20 kg due to metal coordination with the material, and the hydrogel binder is recyclable and reusable. The presence of glycerin allowed the hydrogel sensor device to maintain sensitivity after exposure to air at 25 °C for up to 35 days, and printed hydrogel samples retained their compressive resilience after exposure to air (25 °C, 55 % RH) for 30 days. Hydrogel-based supercapacitors show good stability after 58 h of charge/discharge cycling. This paper provides research ideas for the preparation of hydrogels with strong adhesion properties, as well as hydrogel 3D printing technology for the preparation of flexible sensor devices and flexible energy storage devices.
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ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Liming Yu,Bowen Tao,Fangfang Zhao,Lei Ma,Liangming Wei,Gen Tang,Yue Wang,Xiang Guo
Molybdenum disulfide (MoS2) is a promising anode material for sodium-ion batteries (SIBs) due to its large layer spacing and high theoretical specific capacity. However, its electrochemical performance is hampered by large volume changes and poor ion diffusivity. Herein, a new water-based binder, sodium alginate-L-cysteine (SA-LCy), with a three-dimensional (3D) network cross-linked structure is prepared, which can effectively encapsulate the MoS2 anode materials to mitigate their pulverization. Meanwhile, the CuxS anchor, resulting from the reaction of the SA-LCy binder and the copper foil, can further enhance the binding force between electrode materials and copper foils. Owing to the advantages of the SA-LCy binder, the electrochemical performance of the MoS2 anode is significantly improved. The specific capacity of 370.8 mAh g–1 can be achieved at 0.2 A g–1 after 220 cycles, corresponding to a capacity retention of 95%. Moreover, a high reversible specific capacity of 345.3 mAh g–1 can be obtained at 10 A g–1. As for the MoS2//Na3V2(PO4)3/C-PVDF full cell, the specific capacity of 80.9 mAh g–1 can still be maintained at 0.5 A g–1 after 50 cycles. Hence, we confirm that SA-LCy is a promising binder for high-performance SIBs.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Shu Luo,Yi Song,Zhou Zhou,Xiao-yan Xu,Nan Jiang,Ying-juan Gao,Xia Luo
The efficacy of nanoencapsulation as a technology for enhancing the solubility of active substances has been demonstrated. In this particular investigation, Ganoderic acid DM (GA-DM) was encapsulated within sodium alginate nanoparticles (NPs) using the ionic crosslinking method. The confirmation of the successful loading of GA-DM was ascertained through the analysis of Fourier transform infrared spectrum (FTIR). Empirical evidence derived from the examination of scanning electron microscope (SEM) images, transmission electron microscope (TEM) images, atomic force microscope (AFM) images, and dynamic light scattering (DLS) demonstrated a regular distribution and spherical morphology, with an average particle size of approximately 133 nm. The investigation yielded an encapsulation efficiency of 95.27 ± 0.11 % and a drug loading efficiency of 21.17 ± 0.02 % for the prepared sample. The release kinetics of SGPN was fitted with the Korsmeyer-Peppas kinetic model corresponding to diffusion-controlled release. The incorporation of GA-DM into sodium alginate nanocarriers exhibited a mitigating effect on the cytotoxicity of HaCat and B16, while also demonstrating inhibitory properties against tyrosinase activity and melanin formation.
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