CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Ying-Ying Jing,Yun-Cheng Li,Yong-Qi Luo,Long-Hua Zou,Yuan-Mou Tang,Yu-Xi Lin,Fan-Bing Meng
To investigate the effects of gum incorporation on the performance of sodium alginate (SA)-based composite hydrogel beads (CHBs) in protecting Limosilactobacillus fermentum , gum arabic, κ-carrageenan, low methoxyl pectin, konjac glucomannan (KGM), low acyl gellan gum, and xanthan gum were compounded with SA to prepare CHBs of A-A, C-A, P-A, K-A, G-A and X-A, respectively. The encapsulation efficiency of CHBs for L. fermentum ranged from 80 % to 100 %, with P-A and X-A showing the greatest encapsulation efficiencies of 94.6 % and 99.3 %, respectively. P-A had the highest L. fermentum survival rate of 8.1 log CFU/g, and the leakage rates of A-A, C-A, P-A, and K-A compared to SA hydrogel beads were 85.74 %, 70.06 %, 87.49 %, and 87.66 %, respectively. Gum incorporation improved the water retention capacity and reducing hardness. Rheological analysis revealed that the addition of gum arabica, κ-carrageenan, and gellan gum increased the critical strain of hydrogel, xanthan gum and KGM reduced the γ C , whereas low methoxyl pectin had no effect on γ C . The introduction of L. fermentum changed the hydrogel properties and increased elasticity, suggesting probiotics might positively influence the hydrogel network. The comprehensive analysis revealed that the CHBs incorporated low methoxyl pectin with SA provided the best protection for L. fermentum .
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Shuai Yan,Junsheng Wang,Hanxu Zhou,Hua Yuan,Cong Du,Yeqiang Tan
Biomass xerogels with porous structures fabricated in ambient conditions possess great advantages including scalability, biocompatibility, and biodegradability, thus have shown demonstrated potential in various fields. However, disadvantages such as poor moisture resistance, poor mechanical properties, and low production efficiency challenge their practical applications. In this study, microfibers self-assembled from sodium alginate and chitosan are adopted to facilely fabricate biomass porous xerogel membranes with a fast one-step solvent-exchange, which is achieved due to the low crystallinity and small aspect ratio of the microfibers. The structure and properties of the membranes are found closely related to the surface tension of the solvent used for solvent exchange. The xerogel membrane prepared by one-step solvent-exchange to ethanol followed ambient drying exhibits a pore size of ~100 nm, porosity of 71.2 %, tensile strength of 11 MPa, and elongation at break of 7.5 %. The low roughness and high hydrophilicity of the xerogel membrane guarantee its usage as filtration and adsorption membranes. The particle rejection efficiency of the membrane reaches 99.9 % and adsorption capacity of the membrane for methyl blue solution is 43.94 mg/g. This novel strategy using microfibers prepared by the bottom-up method paves the way for the scalable fabrication and wildly application of biomass xerogels.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Shurui Chen,Haonan Wang,Panting Ren,Ruiyun You,Qingqiang Lin,Yudong Lu
In this study, a surface-enhanced Raman scattering (SERS) substrate based on oxidized sodium alginate (OSA)-modified silver nanoparticles (Ag NPs) was developed for the highly sensitive detection of urine biomarkers. Compared to conventional citrate-reduced Ag NPs, the OSA-Ag NPs eliminate the need for additional reducing agents, offering cost-effectiveness and alignment with green chemistry principles. OSA acts as both a stabilizer and a binding site for Ag NPs, enabling uniform nanoparticle distribution and enhanced substrate robustness. This modification significantly improves the substrate's high-salinity stability, sensitivity, and reproducibility. Furthermore, the OSA-Ag NPs substrate exhibited remarkable storage stability, maintaining 92.49 % SERS intensity after 50 days under ambient conditions, which outperforms traditional Ag colloid substrates. The OSA-Ag NPs exhibited detection limits as low as 1.9 × 10 −4 M for urea, 2.4 × 10 −7 M for creatinine, and 2.7 × 10 −7 M for bilirubin, demonstrating high sensitivity and a wide linear range. In artificial urine, the OSA-Ag NPs with high accuracy and repeatability, confirming their practical utility. These results highlight the OSA-Ag NPs substrate as a promising tool for urine biomarker detection, particularly in high-salinity environments. Its ability to maintain performance in complex biological matrices suggests potential for rapid and precise diagnostics, advancing the field of biosensing.
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JOURNAL OF POLYMER RESEARCH
·
2025
·Vol. 32
·期 9
·1-11
·
IF 2.8
Liu Xiang,Deng Yuxin,Wang Ping,Tang Hongyu,Li Shuangqing,Xing Zheng
The utilization of hydrogels in the domain of flexible capacitors (FCs) and multifunctional sensors (MSs) has attained considerable prevalence. However, balancing the various properties of such versatile hydrogels remains a major challenge. In the present study, a novel xIL/PAM/SA dual-network hydrogel composed of polyacrylamide/sodium alginate (PAM/SA) and an ionic liquid (IL) 1-Butyl-3-methylimidazolium hydroxide ([BMIM][OH]) is proposed. The OH − in the IL inhibits the protonation of -NH 2 groups on the polymer chain and avoids the reduction of the number of hydrogen bonds in the system due to the formation of -NH 3+ , thus enhancing the strength of the network. The results showed that the series of tough hydrogels had high tensile strength (386.64 kPa), elongation at break (338.16%), and toughness (670.83 kJ/m 3 ). Moreover, the rich functionality such as capacitive performance (198.5 mF/cm 2 ), water retention performance (LR = 25.4%), temperature sensitivity (GF = 2.12), and strain sensitivity (GF = 4.56), make it have broad application potential. This work improves the traditional dual-network hydrogels by ionic liquids (ILs) and provides a feasible idea for the design of multi-functional tough conductive hydrogels.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yaowei Wu,Zuming Jiang,Yuhao Wang,Xiancai Jiang,Jian Hou,Bei Wei
Poly(acrylamide) (PAM) has excellent thickening ability as a conventional flooding agent. However, PAM confronts the problems of high injection pressure and high shear loss in the process of oil extraction, which have limited its application in this field. In this work, 2, 2, 6, 6-Tetramethylpiperidinooxy oxidized cellulose nanofibers (TOCNFs) enhanced sodium alginate (SA) shell was used to encapsulate PAM to form microcapsule. The composition, morphology, structure and the releasing behaviours of TOCNFs enhanced microcapsules was tested. Mechanical stirring was used to simulate the state of polymer subjected to shear during stratigraphic transport. The release performance of the microcapsules was characterized by measuring the change of viscosity with time. The ratio of the shell material with the best performance was explored, and the enhancement mechanism of the SA shell by TOCNFs was discussed. The experiments showed that the release time of PAM from the microcapsules was significantly prolonged with the addition of TOCNFs. The longest release time was observed when the ratio of SA and TOCNFs was 5: 1, with the release time of the microcapsules from the original 8 h to 16 h. The enhanced shear resistance of the microcapsules was attributed to the semi-interpenetrating network structure of SA and TOCNFs via Ca 2+ cross-linking as well as hydrogen bonding. The prepared microcapsules have promising applications in enhancing oil recovery.
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SOFT MATERIALS
·
2024
·
IF 1.6
Chengao Li,Licheng Wang,Liuyun Wei,Mingqing Yuan,Hua Yang
Bilayer hydrogels composed of poly(N-isopropylacrylamide) (PNIPAm) and poly(acrylic acid-co-acrylamide) (P(AAc-co-AAm)) are commonly utilized as anisotropic hydrogels with temperature and pH sensitivity. Nonetheless, PNIPAm is known to possess poor mechanical properties, a slow thermal response, and brittleness, which greatly restricts its application for temperature sensitivity. In order to overcome these limitations, a semi-interpenetrating network (semi-IPN) structure was created by combining PNIPAm with sodium alginate. This structure effectively addressed the issue of PNIPAm’s brittleness, increased its tensile stress, and improved its tensile strain. Notably, a porogen such as sodium carbonate was incorporated to increase the porosity of the thermo-sensitive layer hydrogel, resulting in a faster thermal response rate. The bilayer hydrogel obtained can be used as a bidirectional hydrogel driver with both temperature and pH sensitivity. Mechanical manipulation through temperature changes or pH shifts can cause significant deformation in the hydrogel, making it a promising material for soft actuator applications.
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CARBOHYDRATE RESEARCH
·
2021
·
IF 2.104
Zhijie Geng,Yuxing Ji,Shan Yu,Qunfeng Liu,Zongbao Zhou,Cuiping Guo,Daohuan Lu,Dating Pei
The development of cheap and easily available injectable hydrogel is an urgent problem in the field of biomedical engineering. Herein, we used chitosan quaternary ammonium salt and sodium alginate to prepare a dual crosslinking hydrogel. The hydrogel formed in-situ crosslinking and can be injected continuously. Interestingly, the formed hydrogel possessed a homogeneous 3D network structure and exhibited reasonable mechanical properties. Moreover, the hydrogels had excellent injectability, and the compression strength of the hydrogel (Gel-0.5) was up to 27.65 kPa. Additionally, the hydrogel showed good biocompatibility that evaluated by cytotoxicity. Notably, the hydrogel was nontoxic toward NIH-3T3 cells. In summary, the hydrogel we produced can be used as an ideal biomaterial for further applications in the field of biomedical engineering.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 23
·13096-13107
·
IF 4.22
Wu Sisi,Guo Juan,Wang Ying,Huang Chao,Hu Yong
A novel magnetic polysaccharide composite hydrogel was successfully constructed by using sodium alginate (SA) and carboxymethyl cellulose (CMC) as the backbone and filled with in situ Fe 3 O 4 nanoparticles, which was then employed for removal of heavy metal ion from aqueous solution. The obtained magnetic SA/CMC composite hydrogel was characterized by Fourier transform infrared spectroscopy, fluorescence microscope, thermogravimetric and vibrating sample magnetometer. Effect of contact time, pH and adsorbent dosage on the adsorption of heavy metal ions by the magnetic SA/CMC hydrogel have also been studied. The results show that the prepared magnetic SA/CMC hydrogel can be effectively utilized in the removal of heavy metal ions from aqueous solution. The maximal adsorption capacity of Mn(II), Pb(II), and Cu(II) as calculated from the Langmuir model were 71.83, 89.49, and 105.93 mg/g, respectively. The adsorption process of the magnetic SA/CMC hydrogel on the heavy metal ions can be attributed to ion exchange and chemical adsorption. What’s more, the magnetic hydrogel exhibited high efficiency after four cycles, which indicating it offers great potential for practical application in the removal of heavy metal ions from aqueous solution.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Fei Zhong,Chunlin Chen,JiaoChun Zheng,Linxu Li,Xi Wen
Herein, an efficient boron nitride (BN)-based inorganic flame retardant was introduced into epoxy resin to enhance its fire resistance. Specifically, polyethyleneimine (PEI) was firstly grafted on the BN surface (BN/PEI) through Lewis acid-base interaction, which can greatly improve its water dispersibility. Then, sodium alginate (SA), as a synergistic flame retardant , was combined with BN/PEI (BPS) through electrostatic action to further improve the flame retardant properties of the composite coating . To promote the formation of the carbon layer during the combustion process, zinc ions (Zn 2+ ) were adsorbed on the SA surface through ion exchange. The reinforcement effect of the resulting BPS@Zn hybrids on the epoxy (EP) coatings was explored by fire performance tests. The experimental results confirmed that the BPS@Zn-based EP composite coating exhibited the lowest backside temperature (165.2 ℃), maximum expansion height (23.6 mm) and expansion ratio (18.43) during the combustion process. The TGA-DTG curves proved that the BPS@Zn/EP composite coating had the highest carbon residue (31.7%) compared with other samples. Meanwhile, BPS@Zn/EP exhibited the lowest smoke density rating (41.2%), indicating its best smoke suppression effect. These enhancements can be mainly attributed to the optimal thermal barrier effect of BN, the intrinsic flame retardancy of SA, and the catalytic carbonization effect of metal ions . Further, the carbon residue analysis illustrated that the metal oxides (ZnO) were uniformly distributed in the char layer, which was beneficial to the improvement of its strength and thermal stability.
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Materials Science & Engineering C-Materials for Biological Applications
·
2015
·
IF 3.088
Haiping Zhang,Xiaotian Liu,Mingying Yang,Liangjun Zhu
To mimic the natural fibrous structure of the tissue extracellular matrix, a nano-fibrous silk fibroin (SF)/sodium alginate (SA) composite scaffold was fabricated by a thermally-induced phase-separation method. The effects of SF/SA ratio on the structure and the porosity of the composite scaffolds were examined. Scanning electron microscopy and porosity results showed that the 5SF/1SA and 3SF/1SA scaffolds possessed an excellent nano-fibrous structure and a porosity of more than 90%. Fourier transform infrared, X-ray diffraction, and differential scanning calorimetry results indicated the physical interaction between SF and SA molecules and their good compatibility in the 5SF/1SA and 3SF/1SA scaffolds, whereas they showed less compatibility in the 1SF/1SA scaffold. Cell culture results showed that MG-63 cells can attach and grow well on the surface of the SF/SA scaffolds. The nano-fibrous SF/SA scaffold can be potentially used in tissue engineering.
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JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2020
·Vol. 28
·期 5
·1492-1502
·
IF 2.572
Jiao Chenlu,Li Tingting,Wang Jian,Wang Hao,Zhang Xiaoli,Han Xiaojian,Du Zhaofang,Shang Yali,Chen Yuyue
A three-dimensional (3D) robust sodium alginate/gelatin/graphene oxide (SGGO) triple-network composite aerogel was designed using a “hydrophilic assembly–sustained release gelation” two-step method. The resulting SGGO aerogel has an ordered fishing net-like microstructure, low density (16.2 mg/cm 3 ), high porosity (93.5%), and abundant functional groups when only 3 wt% GO was incorporated. The reinforced mechanical strength can reach 0.37 MPa and 0.12 MPa under dry and wet states, respectively, and the dry strength can still reach 0.31 MPa without a significant loss after five compression cycles. A batch adsorption experiment was performed as a function of pH, contact time and initial concentration. Adsorption behavior followed the pseudo second-order kinetic model and Langmuir isotherm, yielding the maximum monolayer adsorption capacity of 322.6 mg/g and 196.8 mg/g for Methylene blue (MB) and Congo red (CR), respectively. Moreover, thermodynamic studies indicated a spontaneous and endothermic adsorption process. After five regeneration cycles, the adsorption capacity can reach 88.4% and 86.5% of the initial values for MB and CR, demonstrating a high-performance, recyclable and promising candidate for dye wastewater treatment.
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ACS Applied Polymer Materials
·
2025
·
IF 4.7
Jingyuan Zhang,Qiang Wang,Weimin Guo,Ying Qin,Changfang Hu,Kuo Zhang,Jiang Chang,Xiaoyan Yu,Lijian Sun,Qiu Fu,Gaofeng Pan
While there has been an ongoing effort to develop environmentally friendly multifunctional films made from natural polymers and renewable resources, there are still challenges in realizing versatility through a simple and green process. Here, we use aqueous alkali to rapidly dissolve modified cellulose fibers above 0 °C within minutes to prepare cellulose hydrogel substrate. The modified cellulose can be commercially obtained from carboxymethyl cellulose manufacturing with low cost. Subsequently, a biodegradable multifunctional all-biomass composite film is obtained by wrapping sodium lignosulfonate (LSS) and phosphorylated sodium alginate (PSA) molecules in cellulose hydrogel. The films exhibited excellent UV protection, blocking 86–99.3% of UV-A and 99.6–100% of UV–B radiation. Meanwhile, the films blocked 57.4–90.7% of high-energy blue light (HEBL, 400–450 nm) and maintained 66.2–80% transparency at 600 nm. The films effectively block blue light from sources such as computer screens, mobile phones, and lighting systems by means of light absorption. The films outperformed commercial shielding films in UV and HEBL blocking. Notably, the films acquired excellent flame-retardant performance with the addition of PSA, achieving a high limiting oxygen index (LOI) of 33.3%. In comparison with the original one, the composite film exhibited a 75.6% reduction in peak heat release rate and an 84.6% decrease in total heat release. Moreover, the films have ideal biodegradability and mechanical strength, with a tensile strength exceeding 98 MPa. This sustainable and clean strategy would direct all-biomass films toward diversified applications.
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