INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
·
IF 8.2
Yuwei Zhou,Meiru Li,Weicheng Gao,Xueping Li,Lixia Long,Xin Hou,Jin Zhao,Sidi Li,Xubo Yuan
Injectable hydrogels that can withstand compressive and tensile forces hold great promise for preventing rebleeding in dynamic mechanical environments after emergency hemostasis of wounds. However, current injectable hydrogels often lack sufficient compressive or tensile performance. Here, a microstructure-united heterogeneous injectable hydrogel (MH) was constructed. The heterogeneous structure endowed MH with a unique “microstructures consecutive transmission” feature, which allowed it to exhibit high compressive and tensile performance simultaneously. In this work, two types of sodium alginate doped hydrogels with different microstructures were physically smashed into microgels, respectively. By mixing the microgels, MH with one micro-pores featured microstructure and another nano-pores featured microstructure can be formed. The obtained MH can withstand both compressive and tensile forces and showed high mechanical performance (compressive modulus: 345.67 ± 10.12 kPa and tensile modulus: 245.19 ± 7.82 kPa). Furtherly, MH was proven to provide stable and sustained hemostasis in the dynamic mechanical environment. Overall, this work provided an effective strategy for constructing injectable hydrogel with high compressive and tensile performance for hemostasis in dynamic mechanical environments.
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高影响因子
CELLULOSE
·
2023
·Vol. 30
·期 12
·7853-7864
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IF 5.7
Song Baiqing,Zhang Tianyi,Yang Kaili,Tian Guangming,Dang Yunzhi,Ma Jianhua
To realize the biocompatibility, mechanical strength, and sustained antibacterial properties of medical materials, it is feasible to introduce antibacterial material components into biomass matrix to prepare medical materials. Herein, zinc oxide (ZnO) was in-situ synthesized in bacterial cellulose (BC) dispersion and filtered into a film, and the BC/ZnO composite film was further immersed in sodium alginate (Alg) solution to construct the second layer structure. The microstructure, mechanical strength, and antibacterial properties of the composite films were investigated systematically. The tensile strength of the BC/ZnO/CAlg sample was achieved at 16.5 ± 2.4 MPa, much higher than that of the Zn 2+ crosslinked CAlg film of 11.5 ± 1.2 MPa. The Zn 2+ cross-linked Alg in the outer layer and the BC/ZnO composite film in the inner layer combined to create a synergistic effect. This secondary structure design ensures good hydrophilicity and hygroscopicity of the material which enables the sustained-release migration of Zn 2+ from the inner layer to the outer layer. Finally, the BC/ZnO/CAlg composite film possesses excellent antibacterial performance against Staphylococcus aureus and Escherichia coli. In addition, this work systematically expounds on the antibacterial and slow-release mechanism of secondary structure composite membranes. The results will provide a database and theoretical reference for applying BC/ZnO/CAlg composite membranes in the medical field.
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Journal of Water Process Engineering
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2022
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IF 7.34
Feng Liu,Zhiyong Zhou,Yuming Tu,Jianjie Chen,Fan Zhang,Shichao Tian,Zhongqi Ren
Fluoroquinolones (FQs) were widely used in human and veterinary medicine, however, the presence of FQs at lower concentration in the environment could threaten to human health and agricultural production. In this research, the adsorption membranes were prepared based on sodium alginate (SA) crosslinking with multivalent metal ions. The SA-Al/Ca membranes and SA-Ca membrane were prepared by crosslinking with AlCl 3 /CaCl 2 solutions and CaCl 2 solutions, respectively. Comparing with SA-Ca membrane, the presence of Al 3+ in crosslinking agent could produce a large number of adsorption sites on the surface of SA-Al/Ca membrane and remarkably improve the adsorption performance of SA-Al/Ca membrane. Effects of preparation conditions such as crosslinking ways, CaCl 2 percentage in compound crosslinker, and crosslinking time on the adsorption performance of prepared SA-Al/Ca membrane were demonstrated. Moreover, the effects of the initial concentration of ciprofloxacin (CIP) and Levofloxacin (S-OFX), adsorption time, solution pH, ionic strength and adsorption temperature on the performance of SA-Al/Ca membrane were studied. The thermodynamics of the adsorption of CIP and S-OFX were well fitted with the Tempkin adsorption isotherm model (R 2 = 0.9455) and D-R adsorption isotherm model (R 2 = 0.9822), respectively. The maximum adsorption capacity of S-OFX and CIP using SA-Al/Ca membrane was 836.31 mg·g −1 and 858.94 mg·g −1 . The results showed that SA-Al/Ca membranes with good adsorption capacity, low cost and high stability.
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2022
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IF 6.76
Shaojie Wu,Mingyang Li,Lili Xin,Hongming Long,Xiangpeng Gao
Conventional photocatalysts for environmental applications are mainly transitional metal compounds or precious metal nanoparticles, which suffer from weak pollutant adsorption performance, thus limited their applications for high concentrated wastewaters. In this study, asynchronous cross-linked triethylenetetramine modified sodium alginate (CFTS) was used as photocatalyst for the simultaneously catalytic degradation of Cr(VI) and metronidazole (MNZ). Experimental results suggested that asynchronous cross-linking and triethylenetetramine modification have dramatically enhanced the chemical stability as well as the adsorption and photocatalytic behavior of the material. The grafted amino functional groups and cross-linked Fe 3+ ions can promote the rapid separation and transfer of electrons, thus reducing the recombination rate of photo-generated electron-hole pairs. The optimum removal rate of Cr(VI) has reached 99.5 % and MNZ can be completely removed within 20 and 30 min at pH 1.0 under UV light irradiation, respectively. The removal mechanism of Cr(VI) by CFTS is the synergistic effect of electrostatic adsorption and photocatalytic reduction, while photocatalytic oxidation dominated the degradation process of MNZ. Moreover, the removal efficiency can be enhanced in the binary solution of these two pollutants due to the utilization of photo generated electron-hole pairs, which provides new pathways in the treatment of complicated pharmaceutical and domestic sewage wastewaters.
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FOOD HYDROCOLLOIDS
·
2022
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IF 11.504
Zhiming Gao,Chen Gao,Wenxin Jiang,Longquan Xu,Bing Hu,Xiaolin Yao,Yanlei Li,Yuehan Wu
It has been a great challenge of using natural polysaccharides to stabilize food emulsions , due to their poor amphiphilicity. In this study, a novel strategy of using polysaccharide to stabilize O/W emulsions was developed, through in situ crosslinking of sodium alginate on oil-water interface. During the emulsifying process, the acetic acid migrated across the interface, and induced the released of calcium ions , which immediately crosslinked the sodium alginate on interface. Results showed that the oil droplets were encapsulated in the integral polysaccharide shells. The droplet size of the emulsions located in the range from 20 to 200 μm. The concentration of sodium alginate and HAc, as well as the mixing rates were showed to be positively related with the thickness of the shell. However, excess calcium ions would disintegrate the shell structure. Additionally, the interfacial crosslinked sodium alginate stabilized emulsions exhibited excellent physical stability under centrifugating and freeze-thawing.
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Gels
·
2022
·Vol. 8
·期 6
·343
·
IF 4.432
Tianzhu Shi,Zhengfeng Xie,Xinliang Mo,Yulong Feng,Tao Peng,Dandan Song
In this paper, functionalized sodium alginate hydrogel (FSAH) was prepared to efficiently adsorb heavy metals and dyes. Hydrazide-functionalized sodium alginate (SA) prepared hydrazone groups to selectively capture heavy metals (Pb2+, Cd2+, and Cu2+), and another functional group (dopamine grafting), serves as sites for adsorption methylene blue (MB), malachite green (MG), crystal violet (CV). Thermodynamic parameters of adsorption indicated that the adsorption process is endothermic and spontaneous. The heavy metals adsorption by FSAH was physical adsorption mainly due toΔHθ< 40 kJ/mol, and the adsorption of cationic dyes fitted with the Langmuir models, which indicated that the monolayer adsorption is dominated by hydrogen bonds, electrostatic interactions, and π-π interactions. Moreover, the adsorption efficiency maintained above 70% after five adsorption-desorption cycles. To sum up, FSAH has great application prospect.Keywords:sodium alginate;modification;heavy metals;dye;adsorption
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ACS Applied Polymer Materials
·
2022
·
IF 4.855
Changkai Yang,Yanping Huang,Nianhua Dan,Yining Chen
Introducing nanomaterials is an effective strategy for enhancing the mechanical properties of collagen (COL) composite membranes. In this work, we obtained a carboxylated halloysite nanotubes (HNTs) nanomaterial by grafting a macromolecular substance polyglutamic acid (γ-PGA) on the surface of HNTs, which was coblended with collagen matrix to obtain a collagen-based composite membrane with good mechanical properties under the cross-linking effect of sodium alginate oxide (ADA). We investigated that the γ-PGA-grafted HNTs have the potential to improve and enhance the tensile strength and elongation at the break of the collagen membranes. A study of contact angle of composite membranes revealed the γ-PGA-grafted HNTs inhibited the negative effects of HNTs on the hydrophilicity of the COL-ADA membrane. The biological properties of carboxylated HNTs composite-modified collagen-sodium alginate oxide composite membrane (COL-c-ADA) were evaluated in vivo and virto. Polyglutamic acid-grafted HNTs composite-modified collagen-sodium alginate oxide composite membrane material is nontoxic and can promote cell proliferation and migration to promote wound healing.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Lantao Liu,Yaping Lu,Daping Qiu,Dengke Wang,Yinghui Ding,Gang Wang,Zeqian Liang,Zebo Shen,Ang Li,Xiaohong Chen,Huaihe Song
Sodium alginate (SA) is an environment-friendly and low-cost polysaccharide carbohydrate extracted from seaweed. As a carbon precursor, sodium alginate has the advantages of clear molecular structure, small molecular weight, and easy controls of the structure and composition of the product, but there have been few studies for the mechanism for SA carbonization. In this work, the carbon skeleton cross-linking mode, heteroatom doping and defect generation mechanism in the process of SA pyrolysis are clarified. Subsequently, based on the understanding of the carbonization mechanism of SA-derived carbon, we have prepared a stable SA-derived interconnected porous carbon by self-template method. The materials prepared by this method possess high oxygen content (17.6 at%) and high specific surface area (384.4 m 2 g −1 ). Zn-ion hybrid capacitors (ZICs) device assembled with SA-derived porous carbon performs superior energy densities (based on cathode mass) of 78.35 and 35.56 Wh kg −1 at the power densities of 160 and 5120 W kg −1 , respectively. This work deeply explained the carbonization mechanism of sodium alginate and evaluated the application prospects of SA-based carbon in ZICs comprehensively.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Xinyu Cao,Chuang Xiong,Xinyu Zhao,Shujuan Yang,Qiyan Wen,Haiyun Tang,Qu Zeng,Yuhong Feng,Jiacheng Li
Delivering effectively zero-valent selenium nanoparticles (SeNPs) and develop its functions in more fields is still a challenge. Herein, a novel template for the preparation and stabilization of SeNP-based surfactants was developed, amphiphilic sodium alginate (APSA), which can self-assemble into micelles in an aqueous solution. Primarily, physicochemical properties of SeNPs stabilized by APSA with different molecular weights were compared and the interaction mechanism of APSA/SeNPs was investigated. Moreover, a functional Pickering emulsion (PE) was presented using the SeNP-based surfactants. Results showed that high molecular weight-stabilized SeNPs had small particle size (54.72 nm) and great stability due to the hydrogen bonding between Se atoms and APSA. The “soft” particle-decorated SeNPs with interface activity formed a dense interfacial layer on the oil-water interface, which exhibited excellent antioxidant properties. The contents of lipid hydrogen peroxide (LH) and malondialdehyde (MDA) were significantly reduced by 88.7% and 63.4%. Overall, SeNPs stabilized by APSA have great application potential as an emulsifier and antioxidant in industrial field.
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BIOMASS & BIOENERGY
·
2022
·
IF 5.774
Xinhong Han,Jiacheng Liang,Suneerat Fukuda,Lingjun Zhu,Shurong Wang
Sodium alginate–silica (SAS) composite aerogels with excellent absorption capacity were synthesized from rice husk ash through a sol-gel process and freeze drying. The physical and chemical properties of the SAS aerogels were fully characterized using field emission scanning electron microscopy , N 2 adsorption–desorption isotherms, thermogravimetric analysis , Fourier transform infrared spectroscopy, and other techniques. The silica-based composite aerogel containing 18% sodium alginate (18-SAS) had the largest specific surface area of 205.1 m 2 g −1 , the highest pore volume of 0.953 cm 3 g −1 , and the maximum organic-solvent absorption capacity of 6–14 g g −1 . Such an environmentally friendly, low-cost aerogel material with excellent performance is a promising candidate for organic-pollutant absorption.
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CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2022
·
IF 4.119
Haohe Huang,Qifeng Yang,Lanyu Zhang,Chongxing Huang,Yong Liang
A simple polyacrylamide modification method was developed to improve the adsorption capacity and anti-interference of kaolin, which enhanced the adsorption performance of sodium alginate/carboxymethyl chitosan composite hydrogel. Fourier transform infrared spectroscopy, Scanning electron microscopy and energy dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy were used to determine the composition and adsorption mechanism of the adsorbent. In addition, the adsorption effect of the adsorbent on Cu 2+ was measured. The results showed that the adsorption rate conformed to the pseudo-second-order kinetic model and the Langmuir isotherm model, and the maximum adsorption capacity of the adsorbent was 5.5157 mg/g. In addition, adding modified kaolin reduced the interference of certain coexisting ions and the influence of pH. After five reuse cycles, its adsorption capacity was more than 82%. Therefore, this study provides a theoretical basis for improving the adsorbent of biomass-based materials.
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SOFT MATERIALS
·
2022
·
IF 1.619
Kai Chen,Tian Zong,Qin Chen,Siyu Liu,Linmin Xu,Dekun Zhang
In order to control complex motion behavior in organisms, most biological tissues have highly oriented structures and anisotropic mechanical properties, such as articular cartilage, muscle, skin and blood vessel. In this study, inspired by the directional structure and excellent mechanical properties of biological soft tissues, polyvinyl alcohol/carboxymethyl cellulose hydrogels with different contents of sodium alginate were prepared by combining freeze-thaw and prestretching methods. Compared with SEM images without pre-stretch hydrogels, there are obvious ordered pore structures in the pre-stretch samples along the tensile direction, and the network structure becomes denser. XRD and FTI R results indicate that the introduction of SA and CMC increases the number of internal hydrogen bond and forms new covalent bonds. The tensile strength of the hydrogel without annealing and stretching treatments is only 0.41MPa. After annealing and stretching treatments, the tensile strength of the hydrogel is increased to 0.93MPa. Furthermore, the creep deformation of hydrogel was reduced from 1.08 mm to 0.27 mm by annealing and stretching treatments. To sum up, these results suggested that PVA/SA/CMC composite hydrogels with oriented structure might have potential applications in soft tissue repair and other biomaterials.
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