COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Jun Yang,Yihua Xu,Bingqing Fu,Hongyan Li,Fangtao Xiong,Huifang Zhao,Lizheng Sha,Yinchao Xu,Daliang Guo,Jing Li
In order to address the urgent demand for sustainable thermal insulation materials, a biomass-based sodium alginate (SA) aerogel was developed through in situ dual crosslinking with polyvinyl alcohol (PVA) and Zn 2+ /Al 3+ in this work. The SAP-Al 0.15 aerogel demonstrated exceptional multifunctionality with ultra-low density (2.37 ×10 −2 g·cm −3 ), excellent mechanical strength (366.2 kPa longitudinal, 846.7 kPa transverse), and superior flame retardancy (LOI=30.4 % and UL-94 V-0 rating). Hierarchical pore architecture enabled remarkable thermal insulation (ΔT = 55 ℃ at 80 ℃ heating) and weight-bearing capacity (over 3300 times of self-weight). Systematic characterization revealed that Al³ ⁺ crosslinking preferentially enhanced network densification through strong carboxyl coordination, achieving 35.4 % char residue with protective Al 2 O 3 layers. Compared to SAP-Zn 0.15 , Al 3+ crosslinking increased compressive modulus by 377 % while maintaining 97.6 % porosity. This EDTA-mediated in situ dual crosslinking strategy successfully resolved the mechanical-thermal-flame retardancy comprehen-sive improvement in biomass aerogels, positioning SAP-Al 0.15 as an eco-friendly alternative to conventional insulation foams for architectural heat insulation. This work provided fundamental insights into the structure-property relationships of biopolymer-based aerogels, offering a sustainable materials platform for energy-efficient building applications.
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高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Jin Yan,Xinyu Zhou,Chenchen Li,Qi Meng,Yingjie Zhang,Peng Dong
Wastewater containing Cu 2+ and Cd 2+ poses a huge threat to the surrounding environment and human safety. To treat such wastewater, this study developed a novel composite adsorbent (LZT 850 @SA) from thermally activated LZT and sodium alginate (SA). LZT was thermally activated at 850°C (LZT 850 ). The composite LZT 850 @SA was synthesized by mixing LZT 850 powder with SA solution under optimized conditions (20°C, 4 g/L SA, 90 min). Adsorption performance for Cu 2+ /Cd 2+ was evaluated under varying pH, contact time, temperature, and concentration. Kinetics, isotherms, selectivity, and regeneration were systematically studied. Activation at 850°C enhanced LZT crystallinity and created pores (SSA: 5.46 m 2 /g). SA compositing formed unique fibrous architectures and amorphous-crystalline interfaces, significantly increasing SSA to 16.31 m 2 /g (BET). XRD confirmed the dominant phases (CaCO 3 , CaO, MgO) in LZT 850 and phase transition upon SA compositing. SEM/HRTEM revealed SA's transformation of the granular LZT 850 surface into a highly porous, roughened morphology with uniform particle distribution. At pH 6, LZT 850 @SA exhibited exceptional adsorption capacities of 223.47 mg/g (Cu 2+ ) and 227.99 mg/g (Cd 2+ ), reaching equilibrium within 120 min. Adsorption followed pseudo-second-order kinetics and Langmuir isotherm models, indicating chemisorption-dominated monolayer adsorption. Mechanisms involved chemical coordination (C=O, O-C=O, O-H, iron oxides), ion exchange, coordination and electrostatic interactions. The composite demonstrated excellent selectivity and retained 81.9% (Cu 2+ ) and 85.52% (Cd 2+ ) adsorption capacity after 5 regeneration cycles. This provides a new strategy for the composite of solid waste and biopolymers, and at the same time offers technical insights for the treatment of heavy metal-polluted wastewater.
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PubMed
高影响因子
Polymers
·
2025
·Vol. 17
·期 16
·2204
·
IF 4.9
Weidi Zhang,Tiantian Zhou,Jianhao Qiu
The practical application of powdered photocatalysts is significantly hindered by challenges in recyclability and structural instability. This work proposes a sustainable immobilization strategy by integrating BiVO4nanoparticles into a sodium alginate (SA) aerogel scaffold through a facile freeze-drying approach. The abundant hydroxyl/carboxyl groups of SA enable uniform dispersion of BiVO4within the porous network, while the aerogel architecture enhances light-harvesting efficiency and mass transfer kinetics. Innovatively, peroxymonosulfate (PMS) was introduced to synergistically couple photocatalysis with sulfate radical-based advanced oxidation processes (SR-AOPs), where the photogenerated electrons from BiVO4effectively activate PMS to yield high-activity ·SO4−radicals. The optimized BiVO4/SA aerogel achieves nearly complete removal of Rhodamine B within 2 h under visible light, which is competitive to pure BiVO4powders. In addition, the mechanically robust aerogel exhibits exceptional reusability, retaining ~90% efficiency after five cycles without structural collapse. This work provides a paradigm for designing recyclable photocatalyst carriers with dual oxidation pathways, demonstrating significant potential for industrial wastewater treatment.
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高影响因子
ACS Nano
·
2025
·
IF 16
Zhengwan Jiang,Wei Zhang,Can Zhu,Zhiyuan Hu,Xinjian Xiang,Dongsheng Cao,Xianwen Wang
Bacterial infections cause great difficulties in the healing process of wound repair and may worsen this condition, seriously jeopardizing human health. Gram-negative bacteria are more problematic sources of infection because of their outer membrane and endotoxins. In this study, copper telluride@sodium alginate-poly(vinyl alcohol) nanofiber/gauze (CuxTe@SA-PVA NF/G) was constructed and applied to Gram-negative bacterium-infected wounds to achieve good anti-infective effects through the powerful antimicrobial mechanism of copper telluride (CuxTe) nanozymes. CuxTe nanoflowers with peroxidase-like (POD-like), oxidase-like (OXD-like), and glutathione peroxidase-like (GSH-Px-like) activities were synthesized via a simple one-pot method to combat bacterial survival by generating reactive oxygen species (ROS) and consuming GSH. The results of in vitro antimicrobial experiments confirmed that the killing effect of CuxTe nanozymes on Gram-negative bacteria far exceeded that on Gram-positive bacteria and that they could effectively eradicate all kinds of Gram-negative bacteria and disrupt the existence of their biofilms. The results revealed that CuxTe nanozymes damage Gram-negative bacteria by inhibiting bacterial dormancy, affecting iron metabolism, inhibiting flagellar motility, and decreasing the production of extracellular polysaccharide (EPS) and lipopolysaccharide (LPS). To further adapt to clinical applications, we used electrostatic spinning technology to prepare CuxTe@SA-PVA NF/G wound dressings with good biosafety, which were applied to Gram-negative bacterium-infected wounds and pressure ulcer-infected sites. Animal experiments revealed that CuxTe@SA-PVA NF/G has good anti-infection effects and promotes wound healing. The transcriptomics results further revealed that CuxTe@SA-PVA NF/G promoted wound healing through potent antimicrobial activity, modulation of the inflammatory response, and stimulation of angiogenesis and cell proliferation. This study successfully developed a CuxTe@SA-PVA NF/G wound dressing with specific killing effects on Gram-negative bacteria, providing a promising approach for the clinical treatment of specific Gram-negative bacterial infections.
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高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Xiaohong Wang,Bin Yang,Yuqing Yang,Huijie Lu,Zhiguo Hou,Hao Wang,Ziyi Wang,Yue Zhang,Ru Xia,Jiasheng Qian,Ning Jia,Yuchao Ke
Phase-change composites (PCCs) absorb and release heat in the process of phase change without changes in temperature, which makes them a hot spot in the field of heat storage applications. However, in practical applications, there still exist some shortcomings such as poor thermal conductivity and easy leakage. Based upon this, a three-dimensional (3D) porous aerogel with point-surface heat conduction pathway was prepared in this work using polydopamine-Ni-graphene (PDA-Ni-GNS), carboxylated cellulose nanofiber (CNF-C), and sodium alginate (SA) by a combination of prefreezing orientation and freeze-drying. The thermally conductive PPCs were prepared by introducing PEG into the aerogel matrix via vacuum impregnation. Thanks to the successful preparation of PDA-Ni-GNS, the contact area between fillers is greatly enlarged and dispersed in the matrix, which provides a prerequisite for reducing the interface thermal resistance between filler–filler and filler–matrix. Meanwhile, the aerogel from freeze-drying formed a vertically arranged layered 3D thermal network structure inside the composite. The network structure makes the thermal conductivity (TC) in both vertical and horizontal directions of the PDA-Ni-GNS/CNF-C/SA/PEG PCCs greatly improved (at a filler loading of 4 wt %) without any obvious PEG leakage. In the LED lamp heat dissipation and CPU heat dissipation tests, it was also seen that the PDA-Ni-GNS/CNF-C/SA/PEG PCCs had rather excellent TC values. In addition, it was jointly confirmed by TG, DSC, and cyclic DSC that the prepared thermally conductive PCCs also had excellent heat storage performance, high latent heat, good thermal stability, as well as low degree of supercooling. The PCCs prepared by this work have good application prospects in the field of thermal management of microelectronic devices.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Xin Huang,Huijuan Jing,Xiaojing Du,Li Wang,Xingran Kou,Zhonghua Liu,Shijia Wu,Hongxin Wang
In the work, a novel filamentou sodium alginate (SA) /ε-polylysine (PL) fiber with excellent mechanical properties and controllable sizes is prepared in an efficient and environmentally friendly manner via continuous pulling of an electrostatically assembled SA/PL composites at the contact interface of aqueous solutions of cationic polyelectrolyte ε-PL and anionic natural polysaccharide SA. The SA/PL fiber exhibits good antibacterial activity, low cytotoxicity, anti-hemolysis, bioadhesion, and environmental friendliness due to its natural raw materials and green preparation process. In vivo experiments have shown that the SA/PL fiber can promote the healing and repair of skin wounds on the backs of mice via resistance to pathogen infection, reduction of inflammation, and anti-allogeneic allergy of the wound. In summary, these results demonstrate that the SA/PL fiber is a green and biosafe multifunctional natural polymer material, with potential applications in suturing wound.
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高影响因子
ACS Biomaterials Science & Engineering
·
2021
·
IF 4.749
Wenhao Wang,Yuehua Liu,Zifan Liu,Shuai Li,Changxu Deng,Xiaoxiao Yang,Qian Deng,Yeye Sun,Yuxin Zhang,Zhenjiang Ma,Wentao Li,Yang Liu,Xiaojun Zhou,Tao Li,Junfeng Zhu,Jinwu Wang,Kerong Dai
Defects in the formation of microvascular networks, which provide oxygen and nutrients to cells, are the main reason for the engraftment failure of clinically applicable engineered tissues. Inflammatory responses and immunomodulation can promote the vascularization of the engineered tissues. We developed a capillary construct composed of a gelatin methacrylate-based cell-laden hydrogel framework complexed with interleukin-4 (IL-4)-loaded alginate-chitosan (AC) microspheres and endothelial progenitor cells (EPCs) and RAW264.7 macrophages as model cells. The AC microspheres maintained and guided the EPCs through electrostatic adhesion, facilitating the formation of microvascular networks. The IL-4-loaded microspheres promoted the polarization of the macrophages into the M2 type, leading to a reduction in pro-inflammatory factors and enhancement of the vascularization. Hematoxylin and eosin staining and immunohistochemical analysis revealed that, without IL-4 or AC microspheres, the scaffold was less effective in angiogenesis. We provide an alternative and promising approach for constructing vascularized tissues.
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PubMed
高影响因子
DALTON TRANSACTIONS
·
2024
·
IF 3.5
Liyang Lin,Mengjun Li,Ying Yan,Yuanhao Tian,Juan Qing,Susu Chen
The volume expansion and poor conductivity greatly limit the application of silicon as an anode for lithium-ion batteries. Although nanocrystallization of silicon and its surface carbon coating can be improved to some extent, the serious problems of particle aggregation and structural instability have not been effectively solved. In this paper, gelatin and sodium alginate (GE + SA) derived carbon/silicon composites are successfully prepared by a liquid-phase method, the freeze-drying technique, and heat treatment. Si nanoparticles (NPs) are uniformly encapsulated in a three-dimensional network of N-doped carbon that is enriched with a rich pore structure. The reversible capacity of the particular Si@C composite electrode was maintained at 580 mA h g−1 after 300 cycles at a current density of 1 A g−1, showing good cycling stability. Meanwhile, the anode also has excellent rate performance with reversible capacities of 2230, 1458, 1101, and 686.6 mA h g−1 at current densities of 0.1, 0.5, 1, and 2 A g−1, respectively. The GE + SA derived carbon/silicon composites effectively solve the problems of particle aggregation and an unstable carbon/silicon interface structure and can become candidates for anode materials in lithium-ion batteries.
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高影响因子
RSC Advances
·
2016
·Vol. 6
·期 56
·51068-51077
·
IF 3.289
Junhao Huang,Jiacheng Li,Yuhong Feng,Fei Xiang,Rui Wang,Jianbo Wu,HuiQiong Yan,Kai Chen,Qingfeng Zhou,Yanfeng Liu
The interaction of cholesteryl-grafted sodium alginate derivative (CSAD) and decyl-β-D-glucopyranoside (DGP) in solution was studied through the surface tension method, fluorescence spectroscopy, electron paramagnetic resonance (EPR), and dynamic light scattering. Results showed that DGP and CSAD exhibit competitive adsorption behaviour at the water–gas interface and that this competitive behaviour can be intensified by NaCl. EPR revealed that the cholesterol groups of CSAD participate in the formation of micellar structures. The steric effect of the cholesterol groups reduces the microviscosity of the micellar structure, but high-concentration NaCl can weaken the polarity and increase the microviscosity of the formed micellar structure. In addition, at a high DGP concentration, high-concentration NaCl can facilitate DGP precipitation; this condition causes abnormal phenomena of surface tension, fluorescence spectroscopy, and EPR. For the emulsion system, analysis of particle size and rheology indicated that DGP and CSAD form a network structure between oil and water interfaces through interaction and thus enhance the non-Newtonian fluid properties of the emulsion. Owing to the competitive adsorption between CSAD and DGP at the oil–water interface, DGP gradually replaces CSAD with the increase in DGP concentration. With a further increase in DGP concentration, the stable steric effect of polymers between oil drops may disappear, and oil drops may aggregate mutually.
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Bioactive Materials
·
2021
·
IF 14.593
Caili Lv,Linlong Li,Zixue Jiao,Huanhuan Yan,Zongliang Wang,Zhenxu Wu,Min Guo,Yu Wang,Peibiao Zhang
The development of an excellent, bioabsorbable hemostatic material for deep wound remains a challenge. In this work, a biodegradable cotton-like biomimetic fibrous mat of poly ( l -lactic acid) (PLLA) was made by melt spinning. Subsequently, SD composite was prepared by cross-linking sodium alginate (SA) with dopamine (DA). It was immobilized on the fibre surface, which inspired by mussel byssus. Finally, Fe 3+ was loaded onto the 0.5SD/PLLA composite by chelation with the carboxyl of alginate and phenolic hydroxy of dopamine. The haemostasis experiment found that the hemostatic time 47 s in vitro. However, the bleeding volume was 0.097 g and hemostatic time was 23 s when 20Fe 3+ -0.5SD/PLLA was applied in the haemostasis of the rat liver. As a result of its robust hydrophilicity and bouffant cotton-like structure, it could absorb a large water from blood, which could concentrate the component of blood and reduce the clotting time. Furthermore, the addition of Fe 3+ in the 0.5SD/PLLA had a significant effect on improve hemostatic property. It also displayed excellent antibacterial property for Escherichia coli and Staphylococcus aureus . Notably, it possesses superior hemocompatibility, cytocompatibility and histocompatibility. Hence, 20Fe 3+ -0.5SD/PLLA has high potential application in haemostasis for clinical settings due to its outstanding properties.
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高影响因子
TENSIDE SURFACTANTS DETERGENTS
·
2021
·Vol. 58
·期 5
·342-352
·
IF 1.049
Haiyan Gao,Yue Zhou,Jianguo Wang,Hujun Xu
A temperature-sensitive hair dye was prepared with a poloxamer-sodium alginate mixture. When the hair dye was applied to the hair (< 32 °C), it retained its flow dynamics. The hair dye was able to undergo a phase change and formed a solid as soon as it touched the scalp (32°C), which reduced the transdermal amount of p -phenylenediamine (PPD) and also adverse effects and toxicity. Compared to a conventional hair dye, the temperature-sensitive hair dye achieved a reduction of the transdermal amount of p -phenylenediamine by almost 65% at different concentrations. At the same time, the colouring effect was not significantly reduced. The poloxamer alginate hydrogel can be used as a novel colouring material to reduce the harm of the dye intermediate to the human body when colouring hair.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2019
·
IF 4.784
Zhuqing Wang,Shasha Wu,Yuenan Zhang,Lijing Miao,Yujie Zhang,Aiguo Wu
A low-cost, environment-friendly sodium alginate-meso-2,3-dimercaptosuccinic acid hybrid aerogel (SA-DMSA) was synthesized by simple chemical grafting and vacuum freeze-drying method and used to remove heavy metal ions in wastewater. The as-prepared SA-DMSA showed high affinity for heavy metal ions, such as Pb 2+ , Cd 2+ , Cu 2+ , Cr 3+ , and Co 2+ , and can remove >90% of the metal ions from the corresponding solution. SA-DMSA also exhibited high selectivity to Pb 2+ and Cd 2+ , and the maximum adsorption capacities for Pb 2+ and Cd 2+ reached 116.4 and 91.2 mg/g, respectively. The SA-DMSA adsorbent can be regenerated by a simple one-step acid washing, and the adsorption performance remained stable after repeated use. Given its low-cost and easy-to-obtain raw materials, simple preparation process, and simple regeneration process of the adsorbent, SA-DMSA has broad application prospects in the treatment of low-concentration heavy metal ions, especially for wastewater containing Pb 2+ and Cd 2+ .
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