INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2018
·
IF 3.909
Xiubin Hou,Zhixin Xue,Yanzhi Xia,Yimin Qin,Guofang Zhang,Hongwu Liu,Kechang Li
Agar/sodium alginate (AG/SA) nanocomposite films were prepared using solution casting method in presence of various concentrations of nano-SiO 2 (2.5, 5, 7.5, and 10 wt%). The effect of nano-SiO 2 concentration on the nanocomposite film was investigated. The result of Fourier transform infrared (FTIR) illustrated the formation of hydrogen bonding between nano-SiO 2 and polysaccharide . As nano-SiO 2 concentration rose from 0 to 10 wt%, the tensile strength and elongation at break all increased up to maximum, respectively. The tensile strength and elongation at break of film containing 10 wt% nano-SiO 2 increased by 65.29% and 60.38% respectively when compared to those of film prepared without nano-SiO 2 . The reason for enhancing in tensile strength might be related to the formation of molecular interaction . The film containing 2.5 wt% nano-SiO 2 had maximum water contact angle and minimum water vapor permeability among those of all films prepared in this work. However, the film containing 10 wt% nano-SiO 2 had minimum swelling degree and water solubility, further demonstrating the formation of strong interaction. The addition of nano-SiO 2 improved the properties of film against UV light and thermal stability . Overall, the addition of nano-SiO 2 enhanced the mechanical properties, water resistance and thermal stability of polysaccharide film.
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DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Shudi Li,Wanyu Lu,Qijin Tang,Qian Xiao,Yixin Kang,Lingye Hu,Yong Huang,Chao Peng,Hao Yang
Oily wastewater as one of water pollutions has always been a hot issue in the field of chemical engineering and environment protection, and it is still challenge to separate oil water mixture effectively with low energy consumption. Polymer membranes with superhydrophilic and underwater superoleophobic properties are perfect substances for oil–water separation owning to their high separation efficiency, oil anti-adhesion and energy saving. However, these membranes are easily contaminated by microorganisms, leading to biofilms on the surfaces, and reducing their separation flux and efficiency. In order to solve the problems, sodium alginate/chitosan-Ag composite were successfully coated on commercial nylon membranes by self-assembly method, and the effects of the Ag on separation performance and biological activity of the membranes were investigated in detail. Under the optimized condition, the membrane can effectively separate oil-in-water emulsions containing anionic, cationic or non-ionic surfactants, with a maximum separation efficiency of 99.73%. More importantly, the inhibition ratios of the membrane could reach 95.42% and 98.05% against E. coli and S. aureus , respectively, and thus inhibits the formation of S. aureus biofilm, and maintain a high relative flux after being contaminated by S. aureus . The simple preparation process and incredible emulsion separation performance with antibacterial activity of composite membranes will provide great prospects for potential industrial applications.
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DOI
高影响因子
ACS Applied Polymer Materials
·
2020
·
IF 0
Cheng Wang,Guanghua He,Jilong Cao,Lihong Fan,Weiquan Cai,Yihua Yin
Materials for oil–water separation under harsh conditions that exhibit high separation efficiency, salt tolerance, and the capability of high-speed separation and reusability are in great demand. In this study, we introduce a series of sodium alginate (SA)/N-succinyl chitosan (NSCS) composite aerogels with outstanding mechanical strength, robust salt tolerance, and high oil–water separation efficiency. These aerogels were well designed and prepared through a combination of a freeze-drying method, ionic cross-linking, and chemical cross-linking. Due to their remarkable mechanical performance and good flexibility, the composite aerogels could achieve oil–water separation under various harsh conditions. The separation efficiency reached 99% owing to the outstanding underwater superoleophobicity and high-porosity structure of the aerogel. More importantly, the aerogels could preserve their high separation efficiency and underwater superoleophobicity after being soaked in a saturated NaCl solution for 30 days or after 30 separation cycles, which suggested their favorable stability under high-salinity conditions. These results indicated that SA/NSCS aerogels were qualified materials for oil–water separation, which gives us hope for their application in oil–water separation under harsh conditions.
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DOI
INTEGRATED FERROELECTRICS
·
2022
·
IF 0.836
Ran Wang,Na Li,Lexin Zhang,Lili Gao,Wei Hong,Tifeng Jiao
Three-network hydrogels have a wide range of applications due to their different network structures and diverse cross-linking methods. In this work, a triple-network hydrogel strategy based on double network coordination and cross-linking is proposed, including gelatin (Gelatin) network, polyacrylamide acrylic acid (PAMAAc) network, and sodium alginate (SA) network. SA and AAc molecular chains contain a large amount of -COO-, which can coordinate with metal ions and generate a large number of dynamic coordination bonds. The hydrogel forms the PAMAAc network through free radical polymerization, and at the same time the interpenetrating cross-linked Gelatin network and SA network are formed through hydrogen bonding. In addition, the addition of metal ions realizes the coordination cross-linking of the double network in the hydrogel. Moreover, the prepared composite hydrogels exhibit good mechanical properties and self-recovery properties. It should be noted that the concentration of different metal ions and the time of coordination and crosslinking will affect the mechanical properties of the hydrogel. The current work provides an idea for preparing a three-network hydrogel with high compressive strength and fast self-recovery.
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高影响因子
RSC Advances
·
2020
·Vol. 10
·期 64
·39241-39250
·
IF 3.119
Shuifeng Liu,Da Huang,Yang Hu,Jiancheng Zhang,Bairui Chen,Hongwu Zhang,Xianming Dong,Rongbiao Tong,Yiheng Li,Wuyi Zhou
Biocompatible porous scaffolds with adjustable pore structures, appropriate mechanical properties and drug loading properties are important components of bone tissue engineering. In this work, biocompatible sodium alginate (SA)/collagen (Col) multiscale porous scaffolds containing poly(ε-caprolactone) microspheres (Ms-PCL) have been facilely fabricated based on 3D extrusion printing of the pre-crosslinked composite hydrogels. The prepared composite hydrogels can be 3D extrusion printed into porous scaffolds with different designed shapes and adjustable pore structures. The hydroxyapatite (HAP) nanoparticles have been added into the SA/Col hydrogels to achieve stress dispersion and form double crosslinking networks. SA-Ca2+ crosslinking networks and Col–genipin (GP) crosslinking networks have been constructed to improve the mechanical properties of the scaffolds (about 2557 kPa of compressive stress at 70% strain), and reduce the swelling rate and degradation rate of SA/Col scaffolds. Moreover, the SA/Col hydrogels contain hydrophobic antibacterial drug enrofloxacin loaded Ms-PCL, and in vitro drug release research shows a sustained-release function of porous scaffolds, indicating the potential application of SA/Col porous scaffolds as drug carriers. In addition, the antibacterial experiments show that the composite scaffolds display a distinguished and long-term antibacterial activity against Escherichia coli and Staphylococcus aureus. Furthermore, mouse bone mesenchymal stem cells (mBMSCs) are seeded on the SA/Col composite scaffolds, and an in vitro biocompatibility experiment shows that the mBMSCs can adhere well on the composite scaffolds, which indicate that the fabricated composite scaffolds are biocompatible. In short, all of the above results suggest that the biocompatible SA/Col composite porous scaffolds have enormous application and potential in bone tissue engineering.
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 44
·99842-99854
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IF 5.8
Xie Yaping,Du Guoxing,Pang Jiaju,Kong Linghan,Lu Linguo
To resourcefully utilize algal biomass and effectively remove bisphenol A (BPA) from water, sodium alginate (SA) was prepared as the nitrogen-doped magnetic porous carbon material (SAC/N/Fe) with well-developed pore structure according to a one-step method using K 2 CO 3 , melamine, Fe(NO 3 ) 3 ·9H 2 O as the activator, nitrogen dopant, and magnetic precursor, respectively, in this study. The best product, SAC/N/Fe-0.2, was obtained by adjusting the mass ratio of raw materials, and its specific surface area and pore volume were 2240.65 m 2 g −1 and 1.44 cm 3 g −1 , respectively, with a maximum adsorption capacity of 1248.23 mg g −1 for BPA at 308 K. SEM, XRD, XPS, VSM, and FT-IR characterization confirmed that the iron was successfully doped, giving the porous carbon a magnetic separation function. The adsorption process of BPA was more consistent with the Langmuir model and the proposed secondary kinetics, and the adsorption effect was stable and efficient in a wide pH range and under the interference of different metal ions. At the same time, the porous carbon was easy to separate and recover with good regeneration performance.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Jing Chen,Haorong Li,Baoshu Chen,Xuena Li,Dahu Yao,Xiping Gao,Chang Lu,Xinchang Pang
The hydrogel evaporator has shown great potential in solar-driven seawater desalination. However, hydrogels often suffer from heat loss due to their high-water content. Therefore, achieving a balance between energy input and water supply in hydrogels remains a challenge. Herein, Carbon Nanotube-Wrapped Polyacrylamide (CP) particles were introduced into sodium alginate (SA) to prepare CPSA hydrogels with tortuous channels. The hydrogel achieves a balance between photothermal conversion and water supply by enhancing its photothermal performance and increasing the water transport distance. Under 1.0 sun irradiation, the CPSA hydrogel exhibits an evaporation rate of 1.97 kg m −2 h −1 . Additionally, the CPSA hydrogel demonstrates excellent photocatalytic ability for wastewater treatment, such as methylene blue (MB) degradation. Moreover, the tortuous microstructure imparts the CPSA hydrogel (thickness: 6 mm) with an outstanding electromagnetic interference shielding effectiveness of 81.1 dB, primarily through absorption. This work provides new insights into the development of hydrogels for water-energy balance management and high electromagnetic wave shielding applications.
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产品关联
DOI
PubMed
高影响因子
FOOD HYDROCOLLOIDS
·
2025
·
IF 12.4
Zenghong Xing,Xiaoyun Fei,Deming Gong,Guowen Zhang
This study aimed to investigate the structural and functional properties of the ovalbumin (OVA)-proanthocyanidin (PC)-sodium alginate (SA) conjugates, and evaluate the physicochemical stability of the conjugate-based sunflower oil emulsions. The formation of the OVA-PC-SA covalent conjugates was confirmed through glycosylation degree, SDS-PAGE and multispectral methods including fluorescence, fourier-transform infrared and circular dichroism spectroscopy. The results showed that the conformation of OVA was changed after grafting with SA, leading to a decrease in α-helix content and a notable increase in β-sheet content. As the mass ratio of OVA-PC conjugate to SA decreased from 8:1 to 1:4 (w/w), the grafting degree of OVA-PC-SA conjugates increased [from (18.10 ± 1.10)% to (55.14 ± 5.05)%], indicating a deeper level of glycosylation. The covalent binding of SA made the surface microstructure of OVA smoother and more uniform. Moreover, the OVA-PC-SA conjugates exhibited better emulsifying properties and thermal stability compared to pure OVA and OVA-PC conjugate. The interfacial tension of OVA-PC-SA conjugates was time-dependent, and the interfacial adsorption of the conjugates was related to the added amount of SA. Additionally, the OVA-PC-SA conjugate acted as a novel emulsifier to stabilize the sunflower oil emulsions, with the improvement of the emulsions’ physicochemical stability as the mass ratio of OVA-PC conjugate to SA decreased from 8:1 to 1:4 (w/w). This study may offer new insights into enhancing the functional properties of OVA and suggest the application of OVA-PC-SA conjugate as a novel emulsifier in food emulsification systems.
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Lianming Zhang,Kaiting Li,Junzhe Gong,Dan Li,Zhifan Lin,Jianping Li
To enhance the stability, sensitivity, and selectivity of protein sensors for detecting trace human epididymis protein 4 (HE4), sodium alginate (SA) was employed as a protein carrier in this study. After the gelation of SA, the number of active sites of a protein sensor increased and sensor stability improved, leading to the development of a novel, highly sensitive protein sensor based on the conformation of HE4 immobilized within the SA-gel. The surface of a glassy carbon electrode was modified with SA, where the numerous active sites within SA molecular chains induced and stabilized the spatial conformation of HE4. Under the influence of Ca 2+ , SA contracted to form a gel. Upon the elution of HE4, a three-dimensional cavity structure highly complementary to the spatial conformation of HE4 was formed, resulting in the formation of HE4@SA-gel sensor with excellent selectivity and high sensitivity for HE4. Results demonstrated that changes in the probe molecule signal intensity (Δ i ) were linearly and positively correlated with the logarithm of the HE4 concentration (lg( C , mol/L)) in the range from 1.00 × 10 −13 –3.00 × 10 −9 mol/L, with a limit of detection (LOD) of 2.37 × 10 −14 mol/L (LOD = 3σ/ S ). Comparison results indicated that the prepared HE4@SA-gel sensor exhibited a 12.7-fold increase in sensitivity and an 11.36-fold improvement in selectivity compared with nongelated HE4@SA sensor. When used for detecting HE4 in human serum samples, the prepared HE4@SA-gel sensor achieved a recovery rate of 92.4 %–106.7 %.
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产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2018
·
IF 5.158
Zi-jian Shao,Xue-lian Huang,Fan Yang,Wei-feng Zhao,Xin-zhi Zhou,Chang-sheng Zhao
Sodium alginate (SA) beads with ultrahigh adsorption capacity were prepared via hydrogen bonds between SA and 2-acrylamido-2-methylpropa-1-propanesulfonic acid (AMPS), and the AMPS was then post-cross-linked to manufacture SA/PAMPS beads. The equilibrium adsorption capacities of methylene blue (MB) and Pb 2+ for the SA/PAMPS10 beads were 2977 and 2042 mg/g, respectively. Although the SA beads exhibited higher equilibrium adsorption capacities of MB and Pb 2+ than those of the SA/PAMPS10 beads, the SA/PAMPS10 beads had better mechanical property and higher stability. The pseudo-second-order kinetic model and the Langmuir isotherm described the adsorption processes of the SA/PAMPS10 beads for MB well. In addition, the SA/PAMPS10 beads could be reused with stable adsorption capacity for at least three cycles. The beads also had excellent performances on absorbing methylene violet and other heavy metal ions (Cu 2+ , Cd 2+ and Ni 2+ ). Therefore, the SA-based beads with high adsorption capacity might be good candidates for industrial pollutant treatments.
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Liming Ling,Ying Bai,Zhaohua Wang,Qiao Ni,Guanghai Chen,Zhiming Zhou,Chuan Wu
Sodium alginate (SA) is investigated as the aqueous binder to fabricate high-performance, low-cost, environmentally friendly, and durable TiO2 anodes in sodium-ion batteries (SIBs) for the first time. Compared to the conventional polyvinylidene difluoride (PVDF) binder, electrodes using SA as the binder exhibit significant promotion of electrochemical performances. The initial Coulombic efficiency is as high as 62% at 0.1 C. A remarkable capacity of 180 mAh g–1 is achieved with no decay after 500 cycles at 1 C. Even at 10 C (3.4 A g–1), it remains 82 mAh g–1 after 3600 cycles with approximate 100% Coulombic efficiency. TiO2 electrodes with SA binder display less electrolyte decomposition, fewer side reactions, high electrochemistry reaction activity, effective suppression of polarization, and good electrode morphology, which is ascribed to the rich carboxylic groups, high Young’s modulus, and good electrochemical stability of SA binder.
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2022
·Vol. 23
·期 16
·9386
·
IF 6.208
Yan Xu,Zhe Jia,Jiaxing Wang,Jipeng Sun,Ru Song
Astaxanthin loaded Pickering emulsion with zein/sodium alginate (SA) as a stabilizer (named as APEs) was developed, and its structure and stability were characterized. The encapsulation efficiency of astaxanthin (Asta) in APEs was up to 86.7 ± 3.8%, with a mean particle size of 4.763 μm. Freeze-dried APEs showed particles stacked together under scanning electronic microscope; whereas dispersed spherical nanoparticles were observed in APEs dilution under transmission electron microscope images. Confocal laser scanning microscope images indicated that zein particles loaded with Asta were aggregated with SA coating. X-ray diffraction patterns and Fourier transform infrared spectra results showed that intermolecular hydrogen bonding, electrostatic attraction and hydrophobic effect were involved in APEs formation. APEs demonstrated non-Newtonian shear-thinning behavior and fit well to the Cross model. Compared to bare Asta extract, APEs maintained high Asta retention and antioxidant activity when heated from 50 to 10 °C. APEs showed different stability at pH (3.0–11.0) and Na+, K+, Ca2+, Cu2+and Fe2+conditions by visual, zeta potential and polydispersity index measurements. Additionally, the first order kinetics fit well to describe APEs degradation at pH 3.0 to 9.0, Na+, and K+conditions. Our results suggest the potential application of Asta-loaded Pickering emulsion in food systems as a fortified additive.Keywords:astaxanthin;Pickering emulsion;zein/sodium alginate complex;structure characterization;stability;degradation kinetics
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PubMed
高影响因子
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