FOOD CHEMISTRY
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2025
·
IF 9.8
Qinbo Jiang,Huilan Zhang,Quancai Sun,Ye Peng,Hui Zhang
Foods with high-starch porous structures have a high glycemic index (GI), posing health risks. Replacing traditional starch networks with dietary fiber-based porous skeletons promotes a low-GI diet. Herein, regenerated silk fibroin (RSF) and polyphenol complex nanoparticles were embedded into the sodium alginate (SA) cryogel by covalent and noncovalent approaches. Nanoparticles were fabricated by covalent interactions between RSF and polyphenols (proanthocyanidin (PA) and quercetin (QUE)) using a bottom-up method under alkaline conditions. Heating and non-heating treatment on pre-solutions caused Maillard reactions and hydrogen bonding between nanoparticles and the SA matrix. The noncovalent embedding of RSF-PA nanoparticles greatly improved the mechanical properties of the cryogels, with the compressive strength increasing from 24.41 to 139.83 kPa. Cryogels with covalently embedded nanoparticles had higher polyphenol release rates, antioxidation, and antibacterial activities (11.2 mm of inhibition zone against S. aureus ). This work promotes the development of low GI functional diets from dietary fiber-based porous matrices.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Na Li,Shaobai Wen,Chunwei Yu
Sodium alginate (SA) hydrogels have been extensively utilized for pollutant removal from wastewater due to the distinct properties of hydrophilicity, biocompatibility and reusability. However, the limited functional groups and poor adsorption capacity have hindered their applications. In this study, a novel hybrid hydrogel bead, composed of sodium alginate, attapulgite, and zeolitic imidazole framework-8 (SA/ATP/ZIF-8), was synthesized using a one-pot blending and ion cross-linking method for adsorptive removal norfloxacin (NOR) from aqueous solutions. The incorporation of ATP and ZIF-8 significantly enhanced the thermal stability and anti-swelling properties of the SA hydrogel beads. The effects of solution pH, contact time, initial NOR concentration, temperature, and the presence of coexisting substances on NOR uptakes were systematically investigated. The results demonstrated that the NOR uptake on SA/ATP/ZIF-8 hybrid hydrogel beads was significantly higher than that of the pure SA and SA/ATP hydrogel beads, and the maximum theoretical adsorption capacity of SA/ATP/ZIF-8 for NOR was 1360.67 mg/g at pH 5.0. Furthermore, the adsorption kinetic was well-described by a pseudo-second-order model, while the adsorption isotherm was most accurately represented by the Langmuir-Freundlich model. In tests conducted with Nandu River water, the SA/ATP/ZIF-8 exhibited removal efficiencies of 100 % for NOR at an initial concentration of 0.0015 mmol/L and 71 % at 0.015 mmol/L. Spectroscopic characterization and adsorption performance experiments indicated that the adsorption of NOR onto SA/ATP/ZIF-8 involved multiple mechanisms, including hydrogen bonding, electrostatic adsorption, cation exchange, π-π electron donor-acceptor interaction (EDA), and coordination. Consequently, the remarkable features of SA/ATP/ZIF-8 hydrogel beads highlight their great potential and promising practicability for separation and removal of lower-concentration antibiotics from wastewater.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Wenhui Zheng,Qun Liu,Xu Zeng,Meng Li,Yue Liu,Danmin Yang,Xinyi Li,Wuyin Weng,Yucang Zhang
In this work, the sodium alginate (SA) and bacterial cellulose nanofibers (BCNFs) composite films doped with ZnO nanoparticles (ZnO-NPs) and aqueous phase (AP) from hydrothermal carbonization (ZnO-NPs/AP@SA/BCNFs films) were developed for potential in food packaging films. The composite films were prepared using the casting method. The incorporation of the ZnO-NPs significantly enhanced the tensile strength, thermal stability and water resistance of the composite films, while decreasing the water absorption, water solubility and water vapor transmittance. The T 2 relaxation time of the films also showed that the water degree of freedom increased by adding ZnO-NPs. Moreover, the composite films showed good mechanical properties in a wet state with a tensile strength of 25.09 MPa, exhibited strong antioxidant activity (DPPH radical scavenging rate > 90 %) and satisfactory antibacterial (inhibition zone against E. coli and S. aureus of 17.29 mm and 16.23 mm, respectively). It also proved that AP and ZnO-NPs had a synergistic antibacterial effect. The soil-buried experiment indicated the ZnO-NPs/AP@SA/BCNFs films had good degradability. The strawberry preservation experiment showed that the ZnO-NPs/AP@SA/BCNFs films decelerated the weight loss, decay rate, pH and malondialdehyde change, efficiently keeping the freshness and delaying the shelf life of the strawberries.
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2021
·
IF 7.664
Qiang Zhang,Bing Chen,Kun Wu,Bingfei Nan,Maoping Lu,Mangeng Lu
Phase change materials (PCMs) need to improve thermal conductivity and maintain stability to meet actual application requirements. Here, a novel composite based on hydroxylated boron nitride (BN-OH) as a thermally conductive filler with superior thermal energy storage and shape stability is reported. By combining kapok fiber (KF) and sodium alginate (SA), lightweight KF/SA aerogels were fabricated, and their highly porous but durable three-dimensional networks benefit the encapsulation of polyethylene glycol (PEG) and prevent the leakage of PEG. PCMs are prepared by vacuum-assisted impregnating of PEG into the aerogels. The thermal conductivity of 0.684 W∙m −1 ∙K −1 at 10 wt% BN-OH is greatly improved because hydroxyl groups cannot only reduce interfacial thermal resistance but form secure thermal conductive networks. In addition, this novel PCMs possesses excellent shape stability and high latent heat of fusion, and the PCMs keep their shapes stable without any leakage even is compressed upon the melting point of PEG.
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Coatings
·
2026
·Vol. 16
·期 10
·1210
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IF 3.4
Yanuo Wu,Shuaijie Wang,Kang Xiao,Jinglei Sun,Fei Ye
Aiming at the pain points of the multi-phase coexistence of tetracycline antibiotics in coastal marine sediments and the difficulty of efficient removal by traditional single remediation technologies, this study constructed an immobilized laccase–tetracycline-degrading bacteria synergistic remediation system using a sodium alginate–starch double-network hydrogel as the carrier. Through component ratio optimization, the optimal mass ratio of sodium alginate to starch was determined to be 1:1.5. The SA-S-4 hydrogel beads prepared under this condition exhibited excellent mechanical properties and adsorption performance, and could effectively encapsulate both laccase- and tetracycline-degrading bacteria. The results of coastal sediment remediation experiments showed that the hydrogel encapsulated laccase–tetracycline-degrading bacteria synergistic system (HLTB) could achieve a tetracycline removal efficiency of 63.16% within 10 days, which was significantly better than the pure adsorption group and the free laccase–functional bacterial group. The system exhibited favorable removal performance under relatively low-concentration and low-ambient-temperature conditions, and the optimal dosage of this system was determined to be 0.5 wt%. On the basis of UPLC-MS analysis, this study observed that the synergistic combination of laccase and functional bacteria facilitated extensive structural transformation of the tetracycline parent skeleton, with the formation of abundant low-molecular-weight intermediate products. This performance was associated with the cascade coordination between laccase catalysis and microbial intracellular metabolism, and presented a higher level of structural transformation than the single laccase system, which could effectively reduce the potential ecological risk of tetracycline degradation intermediates. This study provides new technical ideas and theoretical support for the in situ green remediation of tetracycline pollution in coastal sediments.
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MATERIALS CHEMISTRY AND PHYSICS
·
2017
·
IF 2.084
Xiaowei Mu,Bihe Yuan,Ying Pan,Xiaming Feng,Lijin Duan,Ruowen Zong,Yuan Hu
A layer-by-layer (LBL) assembly coating composed of α-cobalt hydroxide (α-Co(OH) 2 ) and sodium alginate (SA) is deposited on flexible polyurethane (FPU) foam to reduce its flammability . Scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) are employed to prove the LBL assembly process. It is obvious from SEM results that a uniform and rough coating is deposited on FPU foam compared with that of untreated one. The peak intensity of methylene of SA in FITR spectra and typical (003) diffraction peak of α-Co(OH) 2 nanosheets at 11.0° in XRD patterns increases gradually with increment of bilayer number. Combustion behavior and toxicity suppression property of samples are characterized by cone calorimeter (under an irradiance of 35 kW m −2 ) and Thermogravimetry/Fourier transform infrared spectroscopy. The one and two bilayers (BL) coating on FPU foam can achieve excellent flame retardancy. Compared with untreated sample, the peak heat release rate of the coated FPU foam containing only one BL coating is reduced by 58.7%. The content of gaseous toxic substances during pyrolysis of FPU foam deposited with a single bilayer coating, such as CO and NCO-containing compounds, are reduced by 20.0% and 9.2%, respectively. Besides, the flame retardant mechanism of the coated FPU foam is also revealed.
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JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 10
·4354-4365
·
IF 3.5
Liu Chang,Li Ning,Niu Li,Li Xu,Feng Jacko,Liu Zhiming
The crosslinked of hydroxypropyl methylcellulose (HPMC) and sodium alginate (SA) with a range of weight ratios formed blend films. Antibacterial packaging films (HPMC/ZA blend film) were prepared by simple ion exchange method with HPMC/SA blend film. The mixture of Zn 2+ gave a plenty effect of the prepared films. The microstructure, physical properties, structure, and antibacterial properties of crosslinked films were investigated in detail. It was found that the infrared shifted peaks of O–H stretching and O–H bending in crosslinked HPMC/ZA film, which was caused by the formation of hydrogen bond between HPMC and ZA. SEM images of HPMC 5 /ZA 5 blend film exhibited rougher structure. In addition, the light transmission, thermal properties, water vapor permeability, and antibacterial activity of HPMC 5 /ZA 5 blend film are obviously enhanced, compared with HPMC/SA blend film. Furthermore, HPMC 5 /ZA 5 blend film exhibited better antibacterial activity against S. aureus and E. coli , revealing the possible application on food packaging.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Qingxin Yuan,Zepeng Zhao,Anbo Wei,Jiapeng Fan,Pei Wang,Shunyuan Pan,Dongyang Gao,Jun Song,Dongbo Sun
Multidrug-resistant bacterial infections in skin injuries are hard to repair. There is an urgent need to develop new antibacterials, antibiofilm formation, and immunomodulatory wound dressing. In this study, we produced a bacteriophage-loaded multifunctional hydrogel consisting of aldehyde-modified sodium alginate (ADA), gelatin (GEL), and carboxymethyl chitosan (CMCS) through a Schiff base reaction and borax complexation. These post-reactive ADA/GEL/CMCS/Phage (AGCP) hydrogels, particularly the AGCP3 hydrogel, boast a porous structure, high swelling rate, effective hemostasis, controlled degradation, good rheological properties, and strong antibacterial activity. Furthermore, the hydrogel developed in this study can sustainably release various bacteriophages targeting the bacteria responsible for major skin infections, thereby enhancing antibacterial activity and preventing bacterial biofilm formation. Besides, cytotoxicity and cell proliferation demonstrated that the hydrogel, comprising three polysaccharides, ADA, GEL, and CMCS, facilitates skin tissue regeneration by enhancing cellular proliferation and migration. The AGCP hydrogel enhanced healing and controlled inflammation in bacterial-infected wounds, as evidenced by wound closure, collagen deposition, and quantitative reverse transcription polymerase chain reaction results. In conclusion, the AGCP3 hydrogel exhibits strong antibacterial properties, excellent expands, biocompatibility, hemostatic properties, and a controlled release of bacteriophages, making it ideal for universal bacteriophage delivery systems and wound dressings for skin wounds infected with multidrug-resistant bacteria.
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PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Jieyu Wan,Wenjie Wu,Yanqin Wang,Weijia Zhou,Jun Shao,Changfeng Wan,Haoqing Hou
The oil spills and organic wastewater is a kind of environmental pollution which attracts widely concern. Membrane separation is a potential technology to settle these wastewaters. However, the high cost, the weak antifouling property, and the less functionality of the separation materials limit their promotion. In this work, the sodium alginate/polyvinyl alcohol/graphite-phase carbon nitride (PVA@SA@CN) hydrogel composite membranes were coated on the stainless steel mesh, and the double-network composite membrane was constructed. Results indicated that the PVA@SA@CN composite membrane is superhydrophilic/underwater superhydrophobic, and this composite presents excellent anti-fouling property. Oil-water separation experiments indicated that the separation efficiency was higher than 99 % even constitutively separated for 50 times, and the highest flux reached to 4.5 × 10 3 L·m −2 ·h −1 . In addition, the PVA@SA@CN composite membrane also presented exceptional self-cleaning ability. This research provides a new approach to the field of continuous oil-water separation.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Junjie Yang,Jihong Sun,Tao Yu,Jintong Yao,Kang Wei,Zhen Jiang,Mingjian Fang,Weilong Li
Hydrogel crosslinking varies in properties and stability, with many physiochemical crosslinkers boosting hydrogel performance but raising issues about biotoxicity, sourcing, and compatibility. Cordyceps polysaccharide, from the rare Chinese herb cordyceps, offers antioxidant and anti-cancer benefits without biological toxicity. This study developed a new hydrogel actuating membrane by crosslinking cordyceps polysaccharide with sodium alginate. Hydrogel Bio-mimetic Polymer Actuators (HBPA) were then assembled using non-metallic electrode membranes and tested for electrical actuation properties. A mechanoelectric coupling model was used to study the electrically actuated deflection system of HBPA. Results showed that a crosslinking ratio of 3:5 increased the peak output force density of HBPA to 21.95 mN/g. The actuation speed increased by 8.05 % compared to the basement membrane, while the duty ratio dropped by 80.8 %, significantly enhancing the tremor index. Tremor frequency and amplitude decreased by 43.52 % and 64.88 %, respectively. Electrochemically, specific capacitance grew 3.9 times, resistance fell by 21.7 %, and specific energy rose by 102.42 %. The actuating membrane featured a dense, uniform structure with evenly distributed pores and well-coordinated active groups at the optimal crosslinking ratio. At 4 V, HBPA demonstrated excellent electrical actuation and significant rebound at 0.1 Hz. Moreover, the mechanoelectric coupling model effectively applied to electroactive polymer materials.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Yan Shen,Tianjing Zhang,Haoran Zhao,Yu Xiao,Jie Hong,Mohamed Abbas,Wanliang Yang
Portable and reusable solid-state fluorescence sensors have received much attention in the field of metal ion detection as a superior alternative to traditional liquid-based fluorescence sensors. In this study, a novel HHSS@LaVO 4 :Eu 3+ /polyacrylamide/sodium alginate (HLE/PS) hydrogel was successfully constructed for portable dynamic fluorescence switching detection of Fe 3+ and encryption of security information. The HLE/PS hydrogel was synthesized from HHSS@LaVO 4 :Eu 3+ fluorescent nanofillers embedded in a semi-IPN network of polyacrylamide (PAM) and sodium alginate (SA). The HLE/PS hydrogel has demonstrated excellent performance in the detection of Fe 3+ in aqueous solutions with high selectivity, high sensitivity, fast response (8 min), wide detection range (2–1000 μM), low detection limit (0.78 μM) and ease of use. It can be reused up to five times, underlining its utility and economy as a good performance fluorescence sensor. Notably, the quenching of Fe 3+ fluorescence by ultrasmall LaVO 4 :Eu 3+ nanoparticles on HHSS supports was significantly enhanced compared to conventional large-sized rare earth phosphor fillers. Additionally, by exploiting the reversible fluorescence switching function of the HLE/PS hydrogel, we further developed a high-security multi-layer information encryption platform. Finally, we thoroughly investigated the fluorescence response mechanism of HLE/PS hydrogels to Fe 3+ ions. This work not only provides a representative case for the preparation of packed rare-earth fluorescent hydrogels, but also demonstrates their potential as multifunctional smart luminescent materials.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Zishuai Hu,Mankun Li,Yidan Pang,Yongmei Liang,Baochen Han,Jian Qi,Fanchun Meng,Yaqiang Li,Guangqian Zhu,Lekbach Yassir,Jianhui Li,Dan Liu
Hydrogel coatings demonstrate potential for protecting against microbiologically influenced corrosion; however, they encounter limitations related to weak mechanical properties and toxicity from chemical crosslinkers. In this study, we prepared a photocatalytic antibacterial hydrogel coating using chitosan and sodium alginate loaded with 2D g-C 3 N 4 , which exhibited robust tensile properties, low swelling rates, and exceptional antibacterial efficacy against Escherichia coli and Staphylococcus aureus. The antibacterial activity is primarily attributed to the adsorption of bacteria by –NH 2 groups and the generation of reactive oxygen species by 2D g-C 3 N 4 . Furthermore, the electron-rich microenvironment created by –NH 2 and –OH groups attract the h + generated during 2D g-C 3 N 4 photocatalysis, thereby enhancing the efficiency of charge carrier separation. Density functional theory calculations further support this conclusion. The incorporation of 2D g-C 3 N 4 nanomaterials alters the hydrogel coating structure, disrupting hydrogen bonding and exposing additional –NH 2 groups that bind with H + to improve active adsorption. This innovative hydrogel coating offers a novel strategy for protecting against microbial corrosion in marine environments.
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