JOURNAL OF MOLECULAR STRUCTURE
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2024
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IF 4
Shaopeng Zhang,Jie Ding,Dayong Tian,Jing Wang,Jiale Zhang,Minghua Lu
China faces severe antimony pollution due to long-term, high-intensity mining and smelting operations. Long-term exposure to Sb(III) can lead to chronic respiratory problems. Adsorption method is used to remove Sb(III) because of its simplicity, economy and high efficiency. Therefore, a novel MIL-101(Fe)-Cl/SA hydrogel with oxidation-sorption bifunctionality was developed. 1602 cm −1 and 1025 cm −1 correspond to N H and S = O indicate N-chlorosulfonamide is bonded to MIL-101(Fe)-Cl/SA. MIL-101(Fe)-Cl/SA exhibited rough and wrinkled surfaces with numerous irregular particles by SEM. The presence of O (22 %) and Cl (2 %) confirmed the incorporation of N-chlorosulfonamide and SA into MIL-101(Fe)-Cl/SA by EDS and mappings. The adsorption capacities of MIL-101(Fe)-Cl/SA were 86 mg/g at 298 K and 123.21 mg/g at 328 K by Langmuir model. Kinetic and equilibrium correspond to pseudo-second-order and Langmuir model, respectively. Adsorption was spontaneous and endothermic by thermodynamic analysis. MIL-101(Fe)-Cl/SA exhibited enhanced selectivity in solution containing various ions. Moreover, MIL-101(Fe)-Cl/SA demonstrated potential for regeneration and reuse. The removal process primarily involved oxidation, electrostatic interaction, and complexation. In summary, the capability of MIL-101(Fe)-Cl/SA to adsorb and oxidize Sb(III) underscores its promising potential in mitigating the hazards associated with Sb(III).
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JOURNAL OF POLYMERS AND THE ENVIRONMENT
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2024
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IF 4.7
Sun Jianjun,Zhang Zongrui,Yu Mengyun,Xu Weiwei,Bai Guona,Xiang Yixin,Li Mengqun
The utilization of advanced adsorbents for the removal of heavy metal ion pollution from organic dyes and industrial wastewater has garnered significant research interest. In this study, a novel composite gel consisting of chitosan modified diatomite (DE/CS), sodium alginate (SA), and polyethyleneimine (PEI) (DE/CS-PEI@SA) was synthesized using the ion crosslinking method. The composite gels were analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD), differential scanning calorimetry/thermal gravimetric analysis (DSC/TGA), and Brunauer–Emmett–Teller systems (BET). Their adsorption properties and mechanisms towards copper Cu(II) and lead Pb(II) ions were investigated using infrared, X-ray photoelectron spectroscopy (XPS), energy dispersive spectroscopy, (EDS) and Zeta potential analyses. The DE/CS-PEI@SA composite gels exhibited numerous uniform folds on its surface, boasting a specific surface area (18.96 m 2 /g) and a pore size ranging from 1.5 to 80.0 nm, demonstrating robust thermal stability pre- and post- adsorption. Notably, the composite gels demonstrated impressive adsorption capacities for Cu(II) (174.39 mg/g) and Pb(II) (295.04 mg/g), respectively. The incorporation of DE/CS and PEI into the composite gel contributed to a complex pore structure with numerous accessible sites. The adsorption behavior of the composite gel was effectively described by the pseudo-second-order kinetic model and the Langmuir isotherm model. The primary adsorption mechanism was characterized by single-molecule chemisorption, which encompassed coordination adsorption, ion exchange, and electrostatic attraction. Furthermore, the composite gel demonstrated significant efficiency in adsorption, cost-effectiveness, and ease of separation, making it a promising candidate for wastewater treatment applications. Graphical abstract
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
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IF 7.7
Siyao Han,Dekun Meng,Yujia Liu,Lina Xu,Yunze Ma,Huajiang Zhang,Hanyu Li,Wentao Zhang,Ahmed M. Rayan,Mohamed Ghamry
The smart labels prepared via the casting method and molten 3D printing method have a long heating time at high temperature and a dense network structure, resulting in a decrease in the color response ability of the labels. Therefore, this study uses a nonphase change foam 3D printing method with a shorter heating time to improve the color sensitivity of smart labels. By the pH driving method, the blending and pregelation of sodium alginate (Alg) can extend the drainage time of the interfacial film to the maximum extent, thus further improving the foam stability of egg white protein (EWP) and endowing the interfacial adsorption layer with better flexibility and fluidity. The pregelled Alg-EWP foam has good 3D printing adaptability, shows obvious shear thinning behavior, and has excellent shear recovery and creep recovery properties. The 3D-printed smart label has significantly higher swelling rate (275 % → 400 %), porosity (19.86 % → 42.86 %) and phenolic retention rate (55.51 % → 97.26 %). In addition, the sensitivity of the smart labels prepared via foam 3D printing significantly increased, indicating mackerel freshness. Therefore, the method of nonphase-change foam 3D printing provides a new strategy for preparing smart labels with increased porosity and color sensitivity.
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INTERNATIONAL JOURNAL OF PHARMACEUTICS
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2024
·
IF 5.3
Tao You,Qixiu You,Xiaoyan Feng,Hui Li,Bo Yi,Hengyi Xu
Wound healing constitutes a formidable challenge within the healthcare system, attributable to infection risks and protracted recovery periods. The pressing need for innovative wound healing methods has spurred the urgency to develop novel approaches. This study sought to advance wound healing by introducing a novel approach employing a composite sponge dressing. The composite sponge dressing, derived from LFL-ZnO (synthesized through the green methodology utilizing Lactobacillus plantarum ZDY2013 fermentation liquid), polyvinyl alcohol (PVA), and sodium alginate (SA) via a freeze–thaw cycle and freeze-drying molding process, demonstrated notable properties. The findings elucidate the commendable swelling, moisturizing, and mechanical attributes of the SA/LFL-ZnO/PVA composite sponge dressing, characterized by a porous structure. Remarkably, the dressing incorporating LFL-ZnO exhibited substantial inhibition against both methicillin-resistant Staphylococcus aureus (MRSA) and Staphylococcus aureus (S. aureus). Hemolysis and cytotoxicity tests corroborated the excellent biocompatibility of the sponge dressing. In vivo evaluation of the therapeutic efficacy of the 1 mg/mL LFL-ZnO composite dressing on scald wounds and S. aureus-infected wounds revealed its capacity to accelerate wound healing and exert pronounced antibacterial effects. Consequently, the composite sponge dressings synthesized in this study hold significant potential for application in wound treatment.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Zhifei Yang,Chen Wang,Zhiyuan Zhang,Fangzheng Yu,Yu Wang,Jianqiang Ding,Zheng Zhao,Yichao Liu
Treatment of diabetic wounds is a major clinical issue. Diabetic wound dressings have higher requirements for anti-oxidant, antibacterial and wound monitoring properties compared to conventional wound dressings. In this study, a novel tannic acid (TA)/quaternized carboxymethyl chitosan (QCMCS)/oxidized sodium alginate (OSA)@carbon quantum dots (CQD) (TA/QCMCS/OSA@CQD) hydrogels for promoting diabetic wound healing and real-time monitoring have been developed. The TA/QCMCS/OSA@CQD hydrogels exhibited excellent self-healing, antibacterial and antioxidant properties. Besides, these hydrogels possessed good biocompatibility and effective hemostasis in a mouse liver injury model and significantly facilitated the healing process in a diabetic wound model. In addition, these hydrogels can reliable and timely measure the diabetic wound pH information by collecting image signals of hydrogels to monitor the healing status. Therefore, the pH responsive TA/QCMCS/OSA@CQD hydrogels could be utilized as wound dressing for promoting diabetic wound healing and real-time monitoring.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Qihang Lv,Tianyuan Xiao,Guohua Dong,Xiaoxiao Tan,Zhuanfang Zhang,Ming Zhao,Min Zhu,Jinlong Li,Wenzhi Zhang
The exploration of environmentally friendly slow-release fertilizer (SRF) based on natural bio-polymers is of great importance in the development of modern agriculture and horticulture. Herein, a novel starch carbamate (SC) modified sodium alginate (SA) hydrogel (SC/SAH) was prepared utilizing as-synthesized SC and natural SA through the cationic ions crosslinking method and ultimately the corresponding slow-release fertilizer (SC/SAH-SRF) was successfully developed by immersing the dried SC/SAH matrix into saturated urea solution. Due to the low gelation temperature and high viscosity of the synthesized SC, the formed SC/SAH exhibits significantly enhanced properties including excellent water absorbency up to 8.02 g/g with considerable repeatability, abundant pore structure and high hydrophilicity compared with the neat SAH and natural starch based hydrogel (NS/SAH). Accordingly, the SC/SAH leads to higher urea loading amount ∼ 1.28 g/g. Importantly, the resultant SC/SAH-SRF also shows superior slow-release performance, yielding a cumulative urea release of only 61.6 % within 10 h and almost completely release >16 h in water, what's more, only 58.5 % of the urea releases within 25 days and exceeding 50 days for complete release in soil column assays. The slow-release of urea from SC/SAH-SRF well complies for the first-order kinetics and accomplishes via a non-Fickian diffusion process. Moreover, the pot experiment demonstrates that the SC/SAH-SRF has higher growth promotion role for the maize seedlings than those of others. Consequently, this work provides a novel strategy for preparing environmentally friendly SRF by blending modified starch and hydrogel.
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Journal of Food Measurement and Characterization
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2024
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IF 2.9
Niu Jichao,You Tingting,Wang Xin,Ya Hanqin,Liang Shanshan,Zhao Ruobing,Ma Yongqiang
Lutein has high nutritional value and plays a variety of physiological functions, particularly in terms of eye protection. It presents potential value for the development of functional foods. However, different environmental factors can significantly influence the properties of lutein. In this study, we utilized whey protein isolate (WPI), sodium alginate (SA), and tea polyphenols (TP) as ternary solid particles to fabricate Pickering emulsions that encapsulate lutein through non-covalent interactions. We examined the retention rate of lutein, microstructure, and rheological properties. The light stability, thermal stability, and storage stability were determined. Additionally, an in vitro digestion model was established. These results demonstrated that WPI-SA-TP composite particles encapsulated lutein Pickering emulsions showed a uniform droplet distribution and possessed an elastic gel structure. The retention rate of lutein remained high after exposure to UV irradiation, heat, and storage for 30 days. During in vitro simulated digestion experiments under gastrointestinal conditions, the bioaccessibility and free fatty acid release rate of lutein were determined to be 14.6% and 13.55%, respectively. Therefore, the mentioned Pickering emulsions efficiently deliver lutein while providing potential insights for the development of other functional nutrient delivery systems. Graphical Abstract
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FOOD HYDROCOLLOIDS
·
2025
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IF 12.4
Yan Wen,Yan Zhang,Na Lü,Zehui Xuan,Lili Lu
D-tagatose is an attractive functional sweetener, and its production via enzymatic synthesis is simple and environmentally friendly; however, it faces challenges related to enzyme and substrate costs. In this study, a novel and cost-effective method for synthesizing D-tagatose was established using L-arabinose isomerase (L-AI) immobilized within a sodium alginate (SA) composite hydrogel, with the low-cost guar gum as the starting material. Eight inorganic or organic materials were individually combined with SA to encapsulate L-AI. The immobilized enzyme prepared with SA and 50-nm SiO 2 particles demonstrated superior properties, including enhanced mechanical strength and improved reusability, compared to enzymes immobilized with other carriers. The structure of the immobilized enzyme was characterized by scanning electron microscopy, Fourier-transform infrared spectroscopy, and X-ray diffraction. The D-tagatose synthesis reaction using the immobilized enzyme was optimized through both single-factor and statistical methods. The maximum yield of D-tagatose reached 30.12% from 1 M D-galactose at 68°C, with a productivity of 6.78 g/L/h. The immobilized enzyme was reusable for 20 cycles of reaction at 60°C, retaining over 55% of its initial activity and accumulating a high amount of 863.74 g/L D-tagatose. Furthermore, it efficiently converted guar gum hydrolysate into D-tagatose, retaining over 50% enzyme activity and yielding 114.32 g/L of D-tagatose after 10 cycles. The excellent enzyme reusability and the exploration of an economic substrate would significantly reduce production costs in large-scale D-tagatose synthesis in the future.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Huanggen Yang,Pei Zhang,Qi Zheng,Faisal Alresheedi,Saleem Raza,Duofu Li,Yan Sui,Mang Lu
In this work, an environmentally friendly method was employed to synthesize a composite hydrogel possessing superior photocatalytic capabilities for removal of volatile organic compound (VOC). TiNbC-MXene were synthesized by exfoliation of TiNbAlC-Maxphase, then TiNbC/VO 2 composites were synthesized by water bath heating synthesis method. After that, polydopamine was in situ deposited on the surface of TiNbC/VO 2 composites to synthesize TiNbC/VO 2 @PDA materials. Finally, the TiNbC/VO 2 @PDA composites were successfully incorporated in sodium alginate (SA) by titration and two-step composite cross-linking process to form TiNbC/VO 2 @PDA-SA. Its morphological properties and structure were investigated through a series of characterizations. This study further investigates the photocatalytic performance of TiNbC/VO 2 @PDA-SA for the degradation of six VOCs under UV-light. Toluene, Xylene, and Acetone achieved degradation efficiencies of 88.2 %, 91.6 %, and 94.3 %, respectively, following first-order kinetics. Vinyl Chloride, Isopropyl Alcohol, and Formaldehyde showed removal rates of 86.8 %, 90.3 %, and 92.6 %. A 30-min dark adsorption phase was critical for achieving equilibrium. Moreover, the proposed mechanism and quenching study indicate that hydroxyl and oxygen radicals play a key role in the degradation process. The materials also exhibited outstanding regeneration capability and maintained strong recyclability over ten successive cycles. Overall, the results confirm that TiNbC/VO 2 @PDA-SA is a highly efficient photocatalyst for VOCs removal.
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Scientific Reports
·
2024
·Vol. 14
·期 1
·1-17
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IF 3.8
El-diehy Mahmoud A.,Farghal Ibrahim I.,Amin Mohamed A.,Ghobashy Mohamed mohamady,Nowwar Abdelatti I.,Gayed H. M.
The main focus of this study was on using radiation to make an ultra-absorbent hydrogel (UAH) from sodium alginate (SA) and gelatin (GL) biopolymers. This UAH can effectively handle water and nitrogen in wheat farming during drought stress. The hydrogel was synthesized by gamma irradiation-induced SA/GL/polyacrylamide crosslinking at 10–40 kGy. Varying SA/GL ratios affected swelling and the gel fraction of SA/GL/PAm hydrogels. The (SA/GL 17/83) hydrogel exhibited a 40.03 g/g swelling degree, while increasing SA content resulted in higher swelling, peaking at 75.5 g/g for (SA/GL 83/17). This indicated a synergistic interaction between SA and GL. The gel fraction also increased from 76.8 to 90.3%, with a higher GL content reflecting increased crosslinking. After multiple hydrolysis cycles, the hydrogel achieved 1293 (g/g) swelling and 36 days of water retention. When applied to wheat ( Triticuma estivum ) under drought stress, it significantly improved shoot length (18%), root length (43%), shoot fresh weight (49%), and shoot dry weight (51%) under extreme drought. The significant increases in protein and carbohydrate content in both shoots (up to 32% and 19%, respectively) and grains (up to 21% and 24%, respectively), along with the reduction in proline content (up to 38%), demonstrate that ultra-absorbent hydrogel (UAH) effectively enhances nitrogen content, photosynthesis, and overall plant health in wheat under varying drought stress levels. This novel SA/GL-based UAH holds promise for addressing water scarcity and agricultural challenges, offering a sustainable solution for water and nitrogen management under drought stress.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Huiying He,Shuai Zhang,Qiteng Ding,Chuanbo Ding,Junran Yang,Xiaoyu Bi,Xiaohang Sun,Dan Sun,Zhiqiang Cheng,Wencong Liu,Dadong Liang
Ulcerative colitis (UC) is a chronic inflammatory bowel disease, and its pathogenesis is closely related to the dysbiosis of intestinal microbiota and the excessive activation of the immune system. Research has shown that Lactobacillus spp. can alleviate UC by enhancing intestinal barrier function and modulating immune responses. However, the primary challenge lies in ensuring the targeted release and survival of Lactobacillus spp. This research aims to develop a drug delivery system comprising Lactobacillus reuteri strain C1/5R (L. r ) encapsulated in zeolitic imidazolate framework (ZIF)-67/sodium alginate (SA) hydrogel microspheres (L. r @ZIF/SA) to achieve targeted delivery of the probiotic to the colon. This study employed dihydrogenourea (taxifolin, TAX) as a pre-intervention to enrich Lactobacillus spp. in the intestinal tract of mice. SA was used as a matrix to encapsulate L. r and ZIF-67. The pH-sensitive characteristics of ZIF-67 enabled in situ crosslinking of SA in the stomach to form stable hydrogels. The hydrogels were converted into emulsion-processed microspheres with reduced particle size to facilitate gastric transit. The pH-dependent degradation of ZIF-67 in the intestine enabled the controlled release of L. r , which modulated the gut microbiota, exerted anti-inflammatory activities, and restored epithelial barrier function. This research overcomes limitations of UC in terms of low oral probiotic viability and antibiotic resistance development, offering a therapeutically effective and clinically translatable strategy for UC management.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2019
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IF 6.361
Lihong Fan,Yuqing Lu,Li-Ye Yang,Fangfang Huang,Xiao-kun Ouyang
Hypothesis We synthesized composite microspheres from cellulose nanocrystal (CNC), polyvinyl alcohol (PVA), and sodium alginate (SA), which were modified with polyethyleneimine (PEI) to introduce a high density of active amino sites onto the surface via the Schiff base reaction. We hypothesized that these (SA/CNC/PVA)@PEI microspheres would have a high adsorption capacity for aqueous diclofenac sodium (DS). Experiments The PEI-modified composite microspheres were characterized and assessed and optimized for aqueous DS adsorption. In addition, the morphology and synthesis mechanism of the adsorbent were studied. Findings The adsorption process showed a good fit with the pseudo-second-order kinetic model (i.e., the process is driven by a chemical adsorption mechanism) and Langmuir adsorption isotherm model (i.e., adsorption follows a single-layer process). Under the optimum experimental conditions (pH: 4.5, adsorption time: 50 min, temperature: 303 K), the maximum adsorption capacity was 418.4104 mg/g, which was relatively high compared to other reported adsorbents. Importantly, after five adsorption–desorption cycles, (SA/CNC/PVA)@PEI showed only a slight loss in adsorption capacity. Compared with other reported adsorbents, the core–shell composite has a good DS adsorptive capacity and high recyclability.
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