JOURNAL OF APPLIED POLYMER SCIENCE
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2023
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IF 3
Chunli Fu,Meng Zhou,Heqing Fu
The urgent problem to solve is how to design a kind of green and porous adsorbent that can effectively remove dye pollutants in the field of the sewage treatment. The objectives of this investigation are to incorporate zeolitic imidazolate frameworks-8 (ZIF-8) particles in situ onto the surface of multiwalled carbon tubes (MWCNTs) and integrate them into an agarose-sodium alginate (ASA) double network hydrogel. The resulting composite hydrogel beads, denoted as MWCNTs/ZIF-8/ASA (MZASA), are synthesized using calcium ion crosslinking. The addition of agarose is employed to create a dual-crosslinked hydrogel, thereby enhancing the mechanical properties of the ASA hydrogel. By incorporating MWCNTs/ZIF-8 nanoparticles, the surface area of the MZASA hydrogel is augmented, leading to an enhancement in dye adsorption capacity. In batch sorption mode, the maximum absorbency of the resulting hydrogel beads for methylene blue (MB) is 493.799 mg/g, which was a third greater than that of pure SA beads. Absorption of MB obeys the pseudo-second-order kinetic model and Langmuir isotherm model, suggesting monolayer chemisorption adsorption. Analysis of the thermodynamics proves that the entire adsorption process is exothermic and spontaneous. Moreover, the MZASA hydrogel beads show high selectivity for cationic dyes in the mixed dye test. Hence, the synthesized MZASA hydrogel beads serve as a highly effective, innovative, and reusable adsorbent for eliminating cationic dyes from water-based solutions.
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REACTIVE & FUNCTIONAL POLYMERS
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2023
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IF 5.1
Zhengyue Li,Xiuying Sun,Xiuqiong Chen,Hongcai Wang,Dongze Li,Ting Shang,Linxin Qi,Huiqiong Yan,Qiang Lin
To enhance the applicability of alginate hydrogel in tissue engineering, we attempted to fabricate oxidized sodium alginate/polyacrylamide-gelatin (OSA/PAM-GT) composite hydrogels by interpenetrating network approach with the hydroxyapatite/D-glucono-δ-lactone (HAP/GDL) as the endogenous ionic cross-linking agent for oxidized sodium alginate (OSA) and N , N ′-methylenebisacrylamide (MBAA) as the chemical cross-linking agent for polyacrylamide (PAM), followed by their surface coverage with gelatin. Then TiO 2 nanoparticles as the reinforcing agent were added to the OSA/PAM-GT hydrogel matrix to construct organic/inorganic hybrid OSA/TiO 2 /PAM-GT composite hydrogels. In particular, the effects of the amount of TiO 2 nanoparticles on the microscopic morphology, mechanical properties , swellability, biodegradability , bio-mineralization and biocompatibility of the composite hydrogels were studied. Experimental results indicated that the addition of TiO 2 nanoparticles into the matrix of OSA/TiO 2 /PAM-GT composite hydrogels could effectively regulate the porosity, mechanical properties, swelling ratio, in vitro biodegradability and bio-mineralization of OSA/TiO 2 /PAM-GT composite. Moreo v er, OSA/TiO 2 /PAM-GT composite hydrogels had the best biocompatibility when the content of TiO 2 nanoparticles was 0.5% ( w / v ), indicating that an appropriate amount of TiO 2 nanoparticles could effectively promote cell adhesion, proliferation and differentiation. Consequently, the combined method of the interpenetrating network technology, the incorporation of TiO 2 nanoparticles with the surface coverage of gelatin could overcome the defects of alginate hydrogels to some extent, making OSA/TiO 2 /PAM-GT composite hydrogels suitable for tissue engineering applications.
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SCIENCE OF THE TOTAL ENVIRONMENT
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2022
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IF 10.753
Peiyu Yang,Fei Yu,Zhengqu Yang,Xiaochen Zhang,Jie Ma
The treatment of antibiotic wastewater pollution is imminent, the studies of double-network hydrogels as adsorbents have gradually increased, it is quite important to develop a non-toxic hydrogel with excellent properties as adsorbent. In this study, a graphene oxide modified κ-carrageenan/sodium alginate (GO-κ-car/SA) gel was prepared by calcium hardening. The addition of GO nanosheets enhances the mechanical strength and anti-swelling property of the double-network hydrogel, making it possible for the application in the fixed-bed column system. The elastic modulus is twice as much as the hydrogel without GO. The maximum adsorption capacity in the experiments of the GO-κ-car/SA gel for CIP and OFL can reach 272.18 mg g −1 and 197.39 mg g −1 , respectively. The GO-κ-car/SA gel always remains negatively charged, which means that the adsorption capacity of the gel is better in an acidic environment. In the fixed-bed column system, through Thomas fitting, the maximum adsorption capacity of the simulated OFL wastewater (200 mg L −1 ) is 83.99 mg g −1 . The adsorption mechanism of antibiotics by GO-κ-car/SA gel depends on hydrogen bond , functional groups and electrostatic adsorption. The good hydrophilic properties, excellent adsorption capacity and high mechanical strength, which can ensure that the adsorbent is in full contact with the contaminants without major deformation or damage, makes the study more helpful for the further study on hydrogel in the fixed-bed column system.
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PubMed
高影响因子
Foods
·
2021
·Vol. 10
·期 11
·2629
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IF 4.35
Yufeng Chen,Jingchong Peng,Yueqi Wang,Daniel Wadhawan,Lijun Wu,Xiaojing Gao,Yi Sun,Guobin Xia
In this study, two polysaccharides [sodium alginate (ALG) and sodium carboxymethyl cellulose (CMC)] were selected to establish zein/sophorolipid/ALG (ALG/S/Z) and zein/sophorolipid/ALG (CMC/S/Z) nanoparticles to encapsulate 7,8-dihydroxyflavone (7,8-DHF), respectively. The results showed that polysaccharide types significantly affected performance of ternary nanoparticles, including CMC/S/Z possessed lower polydispersity index, particle size and turbidity, but higher zeta potential, encapsulation efficiency and loading capacity compared to ALG/S/Z. Compared to zein/sophorolipid nanoparticles (S/Z), both ALG/S/Z and CMC/S/Z had better stability against low pH (pH 3~4) and high ionic strengths (150~200 mM NaCl). Hydrophobic effects, electrostatic interactions and hydrogen bonding were confirmed in ternary nanoparticles fabrication via Fourier-transform infrared spectroscopy. Circular dichroism revealed that CMC and ALG had no evident impact on secondary structure of zein in S/Z, but changed surface morphology of S/Z as observed by scanning electron microscope. Encapsulated 7,8-DHF exhibited an amorphous state in ternary nanoparticles as detected by X-ray diffraction and differential scanning calorimetry. Furthermore, compared to S/Z, ALG/S/Z, and CMC/S/Z remarkably improved the storage stability and bioaccessibility of 7,8-DHF. CMC/S/Z possessed a greater storage stability for 7,8-DHF, however, ALG/S/Z exhibited a better in vitro bioaccessibility of 7,8-DHF. This research provides a theoretical reference for zein-based delivery system application.Keywords:Zein;7,8-dihydroxyflavone;sophorolipid;polysaccharide;ternary nanoparticles
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PROGRESS IN ORGANIC COATINGS
·
2023
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IF 6.6
Xingguo Zhang,Baoxue Zhang,Rongrong Mao,Zulong Huang,Keyan Jing,Changchun Jin,Bin Yang,Jun Qi,Manman Yu,Guoyuan Xiong,Yong Hu
Multi-layer active food packing films fabricated with outer layer made of sodium alginate (SA) and inner layer made of k -carrageenan (CAR) and gelatin (GEL) contained with oregano essential oil (OEO) and ZnO nanoparticles (ZnO NPs) were developed through layer-by-layer (LBL) assemble method and characterized in this study. The results of fourier transform infrared (FT-IR) demonstrated OEO, ZnO NPs and SA outer layers were successfully incorporated into the multi-layer film system by hydrogen bonding . ZnO NPs significantly improved the mechanical properties , thermal stability, UV resistance and retention of OEO of the films ( P < 0.05). Scanning electron microscope (SEM) images clearly showed SA/CAR-GEL-OEO film and SA/CAR-GEL-OEO-ZnO NPs film had a bilayer structure. Noteworthy, the multi-layer films exhibited higher OEO retention compared to the mono-layer films, and compensated the negative effect of ZnO NPs and OEO on the light transmittance while enhancing the UV resistance of the films. The multi-layer films exhibited stronger antioxidant and antibacterial activity than mono-layer films. To summarize, the multi-layer films loaded with OEO and ZnO NPs enhanced antioxidant and antibacterial activities and displayed great potential as active packaging for food preservation.
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MATERIALS & DESIGN
·
2021
·
IF 7.991
Tianyi Feng,Bangbang Liang,Hongyan Bi,Yingchao Han
A sandwich-structure like electrospun membrane of polylactic acid (PLA)/nano-hydroxyapatite (nHAP) and polyvinyl alcohol (PVA)/sodium alginate (SA)/nHAP was fabricated for skull defect repair. By controlling the number of repeated AB (A: hydrophobic layer of PLA/nHAP; B: hydrophilic layer of PVA/SA/nHAP) units with a fixed thickness, ABA and BAB sandwich-like structures were constructed to improve the integration of hydrophobic and hydrophilic layers. The results show that the ABA sandwich-like structure played a dominant role in the interface fusion. The tensile strength and interface bonding force were obviously enhanced, which was attributed to the fiber entanglement. Compared to the PLA/nHAP membrane, the composite membrane showed significantly improved water absorption capacity. In vitro and in vivo experiments showed that the composite membrane had good biocompatibility and promoted the repair of skull defects. Therefore, the proposed sandwich-like structure is a feasible strategy to facilitate the adhesion of hydrophobic and hydrophilic fibers in electrospun membranes and to achieve a properly-integrated membrane for tissue defect repair.
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CARBOHYDRATE POLYMERS
·
2018
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IF 5.158
Yu Chen,Haiying Qiu,Miheng Dong,Bin Cheng,Yiguang Jin,Zongrui Tong,Puwang Li,Sidong Li,Ziming Yang
Improving the antibacterial properties of membrane wound dressings of natural polymers is crucial. Iodine is an important safe inorganic antibacterial agent, but was confined in the composition with polymer membranes due to the challenges of homogeneity and stability during drying. In the present work, iodine was complexed with hydroxylated lecithin (HL) to improve its stability and complexing efficiency for the composition with carboxymethly chitosan/sodium alginate. With the aid of microwave drying, hydroxylated lecithin complexed iodine/carboxymethly chitosan/sodium alginate (HLI/CMCS/SA) composite membranes with homogeneously distributions of HLI, high contents of activated iodine, good mechanical and swelling properties, proper water vapor permeability, pH controllable iodine release and excellent antibacterial properties were prepared. The composite membranes exhibited high repairing efficiencies for the infection of a rat model of the seawater immersed wound infection of deep partial-thickness burns. This novel antibacterial composite membrane can be potentially used as a high performance wound dressing for treating and repairing open trauma infections.
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Food Bioscience
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2024
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IF 4.8
Haoyue Ning,Lixin Lu,Yuemei Zhang
To achieve long-term effective protection of food by continuously controlling the release of active substances in an active film, IRMOF-3 was post-synthetic modified with benzoic acid (BA) to obtain BA-IRMOF-3. This modification enhanced the loading capacity of carvacrol (CA) and slowed down its release rate. Research on IRMOF-3 synthesis has found that increasing the proportion of metal nodes can improve its crystallinity. The post-synthesis modification of IRMOF-3 through amide reaction successfully enhanced the binding energy with CA from −5.1 kcal/mol to −6 kcal/mol, resulting in an improved CA loading rate of 28.62% ± 0.15% and delayed release. Furthermore, the BA-IRMOF-3/CA assembly was added to the sodium alginate matrix to prepare the active film BMC@SA, which improved the mechanical and physical properties of the film. The release and antibacterial/antioxidant properties were investigated. The results demonstrated that the active film BMC@SA exhibited significant sustained-release properties and antibacterial/antioxidant activities, reducing the growth of E. coli and S. aureus by 61.95% and 49.33% respectively. In refrigerated pork experiments, the film BMC@SA slowed down the color, weight, pH changes and inhibited microbial growth of fresh pork effectively, and extended the shelf life of pork from 6 d to 12 d, which demonstrated the potential application of active film BMC@SA in food preservation.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yuemei Zhang,Haoyue Ning,Jing Xu,Lixin Lu
This study focused on the encapsulation of modified halloysite nanotubes (AHNT) using sodium alginate (SA) and chitosan (CS) through a layer-by-layer assembly technique. The objective was to develop new composites (CPs) that could control the release of carvacrol (Car) and enhance its stability. The influence of various conditions on the microstructure, chemical properties, and slow-release effects of the CPs was examined by adjusting the pH and concentration of the CS solution. The results indicated that the CPs (CS4.5–1), created with a CS solution concentration of 1 mg/mL at a pH of 4.5, in conjunction with a 1 mg/mL SA solution, demonstrated a superior encapsulation structure and a loading efficiency of 26.33 %. In vitro release experiments confirmed that the CPs exhibited effective slow-release properties for Car. Furthermore, the CS4.5–1 composite provided a physical barrier that resulted in the retention of 94.90 % and 83.61 % of Car after 6 h of exposure to UV light and heat, respectively. Antimicrobial and antioxidant assays indicated that CS4.5–1/Car possessed significant antioxidant properties and effectively inhibited the growth of E. coli and S. aureus . Consequently, the prepared CPs have the potential to enhance the bioactivity of active compounds and may be beneficial for food preservation and other applications.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Ke Zhang,Zhihua Li,Suliman Khan,Mohammad Rezaul Islam Shishir,Huanhuan Zheng,Liying Gao,Jiyong Shi,Xiaowei Huang,Xiaobo Zou
This study aimed to develop a natural colorimetric aerogel based on carboxymethyl cellulose (CMC), sodium alginate (SA), black goji anthocyanin (BGA), and various natural fibers such as cotton fiber (CF), silk fiber (SF), and down fiber (DF) via a freeze-drying approach for monitoring fish freshness. Various colorimetric aerogels, including CMC/SA, CMC/SA/CF, CMC/SA/SF, and CMC/SA/DF were developed and structurally characterized using SEM, FTIR, XRD, TGA, TPA, and BET. CMC/SA aerogel showed higher density (0.054 g/cm 3 ) with no surface pores, while CMC/SA/SF had a large surface area (18.6214 m 2 /g) with uniformly higher porosity (97.113 %) and a lower density (0.024 g/cm 3 ). Moreover, the CMC/SA/SF aerogel exhibited higher mechanical properties and color sensitivity at various pH compared to other aerogels, which was then used as an indicator label for monitoring fish freshness during storage at 4 °C and 25 °C. The label aerogel became blue from purple, when TVB-N and pH values reached 20.03 mg/100 g and 19.50 mg/100 g and pH 6.67 and 6.67 at 4 and 25 °C, respectively, exhibiting fish deterioration. Taken together, the colorimetric aerogel composite CMC/SA/SF shows great potential for application as an intelligent package in monitoring the freshness of fish.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Chuan Yu,Guorui Zhang,Yi Dong,Weiguo Su,Pengcheng Zhang,Yijin Li,Guangming Wan,Keyong Tang,Xialian Fan
Enhancing the hemostatic efficacy and minimizing blood loss in the body has consistently been a primary objective for researchers. This study improved the hemostatic efficacy and tissue adhesion strength of the hemostatic material by augmenting the aldehyde groups in the side chains of sodium alginate. Additionally, it immobilized the aldehyde-modified sodium alginate onto the surface of the hemostatic material through complexation with iron ions, thereby enhancing its antibacterial properties. The mechanical performance results demonstrated that the composite hemostatic sponge can rapidly absorb water, swell to counteract arterial blood pressure, and seal the bleeding wound. The results of tissue and blood cell adhesion and in vivo hemostasis showed that the composite hemostatic sponge can enhance the rate of blood clot formation and the adhesion strength of tissue, thereby reducing the hemostasis time and blood loss. The bacterial and cell growth results demonstrated that the composite hemostatic sponge displays excellent biocompatibility and antibacterial properties. Based on the excellent water absorption, swelling properties, and softness of cellulose sponge, the composite hemostatic sponge offered a significant advantage for achieving rapid hemostasis in penetrating wounds or deep wounds with substantial bleeding.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jianhua Zhou,Xiaosen Du,Kai Lu,Anguo Xiao
The design of an environmentally friendly bio-adsorbent for the removal of heavy metal ions from aqueous media is a sustainable strategy to ensure water safety. Herein, a three-dimensional macroscopic aerogel with photothermal conversion and heavy metal wastewater treatment capability was designed using leather collagen, MXene@polydopamine and oxidized sodium alginate as raw materials, named as MPAC composite aerogel. The applicability of the developed MPAC composite aerogel in water evaporation and heavy metal wastewater treatment was studied. MPAC composite aerogel had good Cr(VI) adsorption capacity. This article focused on the study of adsorption kinetics, isotherms and thermodynamics. The adsorption equilibrium time of MPAC composite aerogel was 60 min, and the equilibrium adsorption capacity of MPAC composite aerogel for Cr(VI) reached 80.73, 100.80 and 112.86 mg/g when the initial Cr(VI) concentration was 30, 70 and 100 mg/L, respectively. The adsorption process of Cr(VI) by MPAC composite aerogel conformed to the two-level dynamics model and the Freundlich adsorption isotherm model, and was a spontaneous endothermic reaction. Additionally, the composite aerogel had good solar-driven water evaporation ability and could enhance the water evaporation rate of Cr(VI) solution. Furthermore, the MPAC composite aerogel had high adsorption performance for Cr(VI) under solar illumination conditions. This new aerogel has the advantages of low cost, environmental friendliness, strong adsorption capacity and photothermal conversion performance and is a promising heavy metal ion adsorbent.
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