ACS Sustainable Chemistry & Engineering
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2018
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IF 6.14
Ran Zhang,Lei Wang,Jun Zhao,Shouwu Guo
Heteroatoms-doped porous carbon nanofibers (HPCNFs) are fabricated through electrospinning of polyacrylonitrile and poly(methyl methacrylate) in N,N-dimethylformamide with sodium alginate as additive, followed by pyrolysis. The morphology and composition of the as-fabricated HPCNFs have been characterized comprehensively by a variety of methods, including scanning and transmission electron microscopies, X-ray photoelectron spectroscopy, and other spectroscopic measurements. Supercapacitors are assembled with the as-obtained HPCNFs as electrodes, and their electric capacitance performances are investigated. The supercapacitors show high specific capacitance (253.2 F/g at 0.25 A/g in 1 M H2SO4 aqueous electrolyte), excellent rate capability, and prominent cycling durability (with capacitance maintenance of 99.8% after 10 000 cycles). It has also been illustrated that the heteroatom content and the morphology of porous carbon nanofibers can be simply tuned by varying the content of SA in the precursor solution, which determine finally the electrochemical performances of HPCNFs as the electrodes in supercapacitors.
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ACS Omega
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2018
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IF 0
Tao Hu,Qinze Liu,Tingting Gao,Kaijie Dong,Gang Wei,Jinshui Yao
A novel hydrogel bead [tannic acid (TA)–poly(vinyl alcohol) (PVA)/sodium alginate (SA)] with high strength prepared by biocompatible PVA, TA, and biocompatible SA via an instantaneous gelation method was applied to remove methylene blue (MB) from aqueous solution. The obtained TA–PVA/SA hydrogel beads were fully characterized by thermogravimetric analysis, Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, and so on. The adsorption performances of TA–PVA/SA hydrogel beads for MB were investigated by changing the factors of TA content, initial concentration, pH, adsorbent dosage, contact time, and temperature systematically. The maximum capacity of TA–PVA/SA hydrogel beads for MB removal was obtained to be 147.06 mg/g at 30 °C, whose capability was better than that without TA. After fitting the adsorbed data, it was basically consistent with the Langmuir isotherm and pseudo-second-order kinetic model. Thermodynamic studies indicated that MB removal was spontaneous and exothermic in nature. It is concluded that the low-cost TA–PVA/SA hydrogel beads as an easily recoverable adsorbent have a great potential on the removal of hazardous dyes from wastewater.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
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IF 7.7
Yuhang Cao,Lingyu Yin,Fei Li,Yi Deng,Baohua Kong,Qian Liu,Hao Wang,Hui Wang
Chilled pork retains most of its nutrients but is prone to deterioration during the production-to-consumption process. To address this issue this study aimed to develop zein-Arabic gum composite nanoparticles loaded with oregano essential oil (ZAG-OEO) and incorporate them into sodium alginate films to enhance the freshness and shelf life of chilled pork. Sodium alginate, known for its excellent film-forming properties, was selected as the matrix to prepare ZAG-OEO-containing sodium alginate films (SA-ZAG-OEO). The results revealed that the tensile strength and elongation at break of the prepared films were 47.73 ± 2.15 MPa and 6.27 ± 0.21 %, respectively, at a 2.5 % nanoparticle concentration. The water contact angle of the films incorporating nanoparticles reached 81.5 ± 1.95°. The incorporation of nanoparticles enhanced the thermal stability and antibacterial activity of the films. The prepared films were utilized for the storage of chilled pork, and the quality changes were analyzed. The results demonstrate that SA-ZAG-OEO films inhibit microbial growth and lipid oxidation, thereby delaying pork spoilage. This study offers new insights into extending the shelf life of chilled pork and developing advanced meat preservation methods for the future development of the meat industry.
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高影响因子
Gels
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2024
·Vol. 10
·期 4
·258
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IF 5
Mingyang Li,Yanen Wang,Qinghua Wei,Juan Zhang,Xiaohu Chen,Yalong An
Hydrogels with excellent flexibility, conductivity, and controllable mechanical properties are the current research hotspots in the field of biomaterial sensors. However, it is difficult for hydrogel sensors to regain their original function after being damaged, which limits their practical applications. Herein, a composite hydrogel (named SPBC) of poly(vinyl alcohol) (PVA)/sodium alginate (SA)/cellulose nanofibers (CNFs)/sodium borate tetrahydrate was synthesized, which has good self-healing, electrical conductivity, and excellent mechanical properties. The SPBC0.3 hydrogel demonstrates rapid self-healing (<30 s) and achieves mechanical properties of 33.92 kPa. Additionally, it exhibits high tensile strain performance (4000%). The abundant internal ions and functional groups of SPBC hydrogels provide support for the good electrical conductivity (0.62 S/cm) and electrical response properties. In addition, the SPBC hydrogel can be attached to surfaces such as fingers and wrists to monitor human movements in real time, and its good rheological property supports three-dimensional (3D) printing molding methods. In summary, this study successfully prepared a self-healing, conductive, printable, and mechanically superior SPBC hydrogel. Its suitability for 3D-printing personalized fabrication and outstanding sensor properties makes it a useful reference for hydrogels in wearable devices and human motion monitoring.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Xiaona Su,Wenyan Liu,Bei Yang,Shujuan Yang,Jinjian Hou,Gaobo Yu,Yuhong Feng,Jiacheng Li
Dietary selenium (Se) supplementation has recently received increasing attention; however, Selenium nanoparticles (SeNPs) exhibit poor stability and tend to aggregate in aqueous solution. Therefore, enhancing the stability of SeNPs and their effective delivery to plants remain challenging. In this study, sodium alginate (SA) and lysozyme (LZ) were reacted via the wet-heat Maillard reaction (MR) to obtain amphiphilic alginate-based polymers (SA-LZ). Alkyl glycosides (APG) were introduced into SA-LZ to enhance the deposition of SeNPs in leaves. Thus, a renewable and degradable polysaccharide-based material (SA-LZ/APG) loaded with Se formed an amphiphilic alginate-based-based shell with a Se core. Notably, the encapsulation of SeNPs into a polysaccharide base (SA-LZ/APG) increased the stabilization of SeNPs and resulted in orange–red, zero-valent, monoclinic and spherical SeNPs with a mean diameter of approximately 43.0 nm. In addition, SA-LZ/APG-SeNPs reduced the interfacial tension of plant leaves and increased the Se content of plants compared to the blank group. In vitro studies have reported that SA-LZ/APG-SeNPs and SA-LZ-SeNPs have significantly better clearance of DDPH and ABTS than that of APG-SeNPs. Thus, we believe that SA-LZ/APG is a promising smart delivery system that can synergistically enhance the stability of SeNPs in aqueous solutions and improve the bioavailability of Se nutrient solutions.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2017
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IF 3.671
Yaoge Huang,Zhuqing Wang
A novel Ethylenediamine-Modified Calcium Alginate Aerogel (ECAA) was synthesized by freeze-drying method, and used to remove Pb 2+ and Cu 2+ from aqueous solutions. The prepared adsorbent was characterized by using the FTIR spectra, SEM analysis and XPS analysis . The effects of the pH, initial metal ion concentration, adsorption kinetics , and isotherms had been studied systematically. Moreover, the ECAA can be regenerated by simple acid treatment and used repeatedly. It is interesting to note that almost no Ca 2+ can be detected after the first cycle that confirmed the adsorption process involves ion exchange.The XPS spectra analyses further indicated that Pb 2+ and Cu 2+ were adsorbed via the chelation of −CO-NH, −NH 2 and −OH. The results from these studies indicated the aerogel is a promising adsorbent to separate and recover the heavy metal ions from contaminated water.
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Food Bioscience
·
2025
·
IF 5.9
Chun-lei Lu,Hua-xiang Li,Fedrick C. Mgomi,Zhen-quan Yang
Probiotic stability and activity during broth fermentation are crucial for enhancing the flavour and nutritional value of the final product. This study introduces a novel staining technique that allows differentiation of Lacticaseibacillus rhamnosus and Staphylococcus xylosus within sodium alginate (SA) encapsulated microspheres without altering the SA structure. Encapsulation efficiencies were 88.41% for L. rhamnosus and 82.68% for S. xylosus , with the staining technique enhancing thermal stability. Co-fermentation in pork broth resulted in significant increases in organic acids (e.g., lactic acid from 3.209 g/L to 8.673 g/L and acetic acid), thereby improving sensory attributes. Amino acid analysis revealed substantial increases in essential amino acids, including glutamic acid (from 7.493 mg/100 g to 27.422 mg/100 g) and glycine (from 12.435 mg/100 g to 30.632 mg/100 g), which contributed to an improved nutritional profile. Furthermore, significant increases in volatile compounds, such as isophorone (up to 148.25 μg/L), 1-Octanol (up to 39.02 μg/L), and benzaldehyde (up to 570.84 μg/L), enriched the aroma of the pork broth. SA encapsulation maintained probiotic viability throughout the extended fermentation period, while strain interactions further enriched both nutritional and flavour profiles. These findings highlight the potential of SA encapsulation combined with co-fermentation to optimize the sensory and nutritional qualities of fermented foods.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Yuxin Xu,Yu Li,Guixin Wang,Meiling Zhang,Xiongxin Peng,Fan Yang,Kui Cheng
The effective mitigation of the environmental impact of heavy metal remains a significant scientific challenge. In this study, a novel and environmentally friendly approach has been proposed to fabricate three-dimensional (3D) functional composite materials for Pb(II) removal. The easy-to-recycle spherical adsorbent is prepared by the dual utilization of sodium alginate (SA) as a bio-source precursor for the synthesis of carbon dots (CDs) and as a natural framework for the formation of SA hydrogel. The abundant surface-active groups on the SA hydrogel not only provide additional adsorption sites for the aggregation of heavy metal ions but can also be readily cross-linked with CDs without chemical additives, and thereby offering a 3D porous structure for chelating metal ions. The resulting HL-5CDs adsorbent demonstrates an impressive adsorption capacity of 305.21 mg·g −1 for Pb(II). The adsorption mechanism involves both chemical reaction and diffusion, leveraging the porous structure and rich oxygen groups of the material. Notably, a pot experiment revealed that the as-prepared HL-5CDs could inhibit the bioavailability of Pb(II). This study introduces a green and straightforward method for creating high-performance adsorbents, showcasing potential applications in energy, cleaning, and the remediation of wastewater pollution.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Shengnan Ouyang,Qing Jiang,Yuhang Wan,Xueru Qu,Zhicai Yu,Hualing He,Jinfeng Wang
Firefighting clothing is an indispensable protective equipment for firefighters performing rescue activities under extreme heat and fire conditions. However, few bio-based thermal management materials that provide thermal comfort to firefighters in different operational scenarios have been reported. Herein, we present a novel strategy to prepare Janus-type aerogels based on sodium alginate biological macromolecules, consisting of a SiO 2 nanoparticle layer and a microencapsulated paraffin@SiO 2 phase-change composite layer. A passive radiative cooling and thermal energy storage was integrated into a functional dual-mode material system. Results show that Janus-type aerogel to cool down by 11.5 °C on a hot summer day. Meanwhile, paraffin@SiO 2 has a high melting enthalpy of 127.5 J g −1 that effectively buffers temperature rise during the phase-change process. This Janus-type aerogel has ultra-low heat insulation (0.042 W/(m·K)), it can delay approximately 76.6 s to reach second-degree burn time for skin at a radiant heat exposure of 18.4 kW m −2 . The work provides an innovative way to develop bio-based thermal management materials, which could enable multi-scenario thermal management for firefighting clothing.
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Jiwen Zhang,Xiaozhen Hu,Kaiyuan Shi,Haiyan Sun,Dejian Yang,Mutian Yang,Bo Xu,Zhengwen Xu,Defu Xu
Interfacial solar desalination of seawater/wastewater is one of the most promising strategies to mitigate the crisis of freshwater shortage. Tremendous progress on improving the evaporation rate has been achieved over the past ten years, however, with the rapid evaporation at the interfacial region of water and air, salt simultaneously aggregates on the solar absorbers , reducing the stability of the evaporative performance. It is essential to design salt-resistant solar evaporators , especially for dealing with highly concentrated brine, in which salt clogging is more likely to occur. Here, we demonstrate a facile and scalable synthesis of self-cleaning particles system by coating carbon black (CB) onto expanded polystyrene (EPS), which can generate freshwater from high salinity brine. With sodium alginate (SA) as a binder, the EPS core-CB shell particles are fabricated by a simple ‘rolling rice dumpling’ strategy. These particles spontaneously gather to a system in water attributing to the surface tension, which function coordinatively to realize the self-cleaning process through rotating ascribed to the unbalanced force after salt crystallization. Benefiting from the low cost of materials, facile synthesis procedure, and good performance in high salinity water, our EPS-CB particles system opens up an avenue for the practical applications of interfacial solar desalination.
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Journal of Cleaner Production
·
2025
·
IF 10
Shengkai Liu,Birong Yan,Yu Han,Wei Wang,Yimin Shi,Yonggui Wang,Huiling Li,Junhao Liu,Zefang Xiao,Daxin Liang,Yanjun Xie
Extracting lithium from brine has become one of the most direct and urgent solutions to address the current shortage of lithium resources. The titanium-based lithium-ion sieve (HTO-LIS) is notable for its stable structure, easy preparation, and environmental friendliness. However, the adsorption capacity of HTO has reached a bottleneck, and the serious aggregation phenomenon and low recovery efficiency caused by its powder form also urgently need to be addressed. By doping trace amounts of Fe into HTO, the number of oxygen vacancies can be increased and thus promote ion diffusion, resulting in the increasement of adsorption capacity by 33.8%. More significantly, the introduction of sodium alginate (SA) and carboxymethyl cellulose (CMC) as substrates not only significantly enhances the structural stability of the composite material, but also synergistically constructs a unique polymer network structure that endows the aerogel with outstanding resistance to acid-base erosion, ensuring its integrity under harsh conditions. CMC, with its exceptional swelling properties, significantly enhances the aerogel's surface area and promotes efficient, uniform dispersion of HTO, playing a pivotal role in enhancing adsorbent performance. The optimal adsorbent, 0.03Fe/HTO@SC13, exhibits a maximum adsorption capacity of 42.45 mg g −1 and retains 95.8% capacity after six cycles.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Sawsan Dacrory
3D multifunctional scaffold has been designed based on Cs/SA/NS/NPHA. Nanoparticles hydroxyapatite (NPHA) was prepared via precipitation method of sodium dihydrogen phosphate in presence calcium chloride . Different ratios of Chitosan (CS)/Sodium Alginate (SA) were used to prepare Cs/SA scaffolds in presence of CaCl 2 as a cross linker . NPHA was incorporated in CS/SA scaffold and neomycin sulfate (NS) was added as an antimicrobial agent. The structure and surface morphology of the scaffolds were investigated via infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscope (SEM) and thermal gravimetric analysis (TGA) techniques. Additionally, Antimicrobial activity of the scaffold has evaluated against Gram- negative and Gram- positive bacteria. The result showed promising antimicrobial activity against Bacillus subtilis , Staphylococcus aureus , Escherichia coli , Pseudomonas aeruginosa and Candida albicans . Furthermore, cytotoxicity against MG63 osteosarcoma cell and fibroblast normal cell line has investigated. The result showed anti-proliferative against MG63. DFT calculations and molecular docking were used to study the reactivity of the compounds. The results exhibited that Cs/SA/NS/NPHA is potent expected to be used in bone tissue regeneration .
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