JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 56
·期 1
·913-926
·
IF 3.553
Du Zoufei,Liu Fei,Xiao Changfa,Dan Yi,Jiang Long
Developing a reusable and durable catalyst for heterogeneous photo-Fenton process is of great importance for the practical application in the environment remediation. In this study, poly(vinyl alcohol) (PVA)/sodium alginate (SA) hydrogel beads were constructed using FeCl 3 and boric acid as cross-linking agents. Characterizations and tests were employed to investigate the structure, optical property and durability of the obtained beads. The photo-Fenton performance of the PVA/SA-FeCl 3 beads was evaluated by degradation of tetracycline (TC) under visible-light irradiation. The results show that the constructed beads exhibit porous structure, display a broad absorption band in the visible region and behave excellent stability against mechanic effects. The photocatalytic experiment result indicates that the removal rate of TC reaches 90.5% under optimized conditions, while the removal rate of total organic carbon reaches 28.6%. By analyzing the degradation of TC after adding active species scavengers, a photocatalytic mechanism was proposed. Moreover, PVA/SA-6% FeCl 3 beads could be easily separated and recycled in water purification. This work provides a facile and robust method to construct reusable and durable Fe(III)-containing hydrogel beads with acceptable photo-Fenton catalytic performance under visible-light irradiation, paving the way for its practical application in wastewater treatment.
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JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2022
·Vol. 30
·期 11
·4863-4876
·
IF 4.705
Fan Yajun,Shen Dianling,Yan Yu,Hu Xiaopeng,Guo Yaping,Zhong Yujun,Li Zhiyang,Xie Lianwu
To achieve efficient adsorption and recycling of Cu 2+ in wastewater, using Cu 2+ as template ion, glutaraldehyde as crosslinker, three sodium alginate hydrogel beads including SA, SAC, and SAB beads were prepared by imprinting sol–gel method using sodium alginate (SA) with carboxymethyl cellulose (CMC) and β -cyclodextrin ( β -CD) as different precursors, respectively. Scanning electron microscopy and Fourier transform infrared spectroscopy were used to characterize and analyze morphology and composition change of the hydrogel beads, respectively. When the mass ratio of SA to CMC or SA to β -CD reach 1:1, the SAC beads or SAB beads are nearly homogeneous sphere. Then the effects of pH, adsorption time, initial concentration of Cu 2+ , adsorbent dosage, and coexisting ions on the adsorption efficiency of three hydrogel beads were investigated. The results indicated that adding carboxymethyl cellulose and β -cyclodextrin into skeleton of beads increased the toughness of the beads and improved the adsorption capacity of Cu 2+ . Compared to the saturated adsorption capacity 510 mg/g of Cu 2+ on SA, the saturated adsorption capacity of Cu 2+ on SAB and SAC reached 817 mg/g and 822 mg/g, respectively. And their adsorption efficiency for Cu 2+ are over 95% at 25 °C with pH of 7, contact time within 350 min, adsorbent dosage of 4 mg/50 mL, and initial concentration of 5 mg/L. Thus, SAC and SAB beads could be used as adsorption material for detecting and removing Cu 2+ from wastewater.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2025
·
IF 8.4
Yiming Liu,Weixuan Pan,Hui Zhang,Ningxin Geng,Liangxu Jiang,Jiaan Bao,Huiwen Wu,Qi Liu
In this study, a composite aerogel was synthesized through the in situ integration of ZIF-8 within a sodium alginate (SA) framework, followed by cross-linking and freeze-drying. SA@ZIF-8 demonstrated enhanced adsorption capacity and reusability. The introduction of ZIF-8 improved the aerogel’s surface properties and generated abundant porous adsorption sites. At 298 K, the composite exhibited a maximum theoretical adsorption capacity of 200.4 mg g −1 for tetracycline (TC). The adsorption process of SA@ZIF-8 for tetracycline followed the pseudo-second-order kinetic model and the Langmuir isotherm model. The adsorption mechanisms include synergistic effects, hydrogen bonding, coordination bonding, electrostatic attractions, and π–π interactions. In addition, following ten adsorption-desorption cycles, the material consistently demonstrated a removal efficiency surpassing 65.7 %. On the whole, this study demonstrates an efficient biomass adsorbent for the removal of tetracycline from drain water. The prepared composite aerogel exhibits excellent reusability for efficient tetracycline removal from wastewater, demonstrating strong potential for practical water treatment applications.
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PubMed
高影响因子
Food Frontiers
·
2025
·
IF 6.9
Minghui Kong,Haixia Yang,Daidi Fan,Jianjun Deng
Oral insulin administration offers significant advantages of accurate dosage, convenient administration, and improved patient compliance compared to subcutaneous injection. However, existing oral insulin formulations struggle to overcome the physiological barrier in the gastrointestinal tract, leading to low bioavailability and uncontrolled burst release. In this research, an insulin delivery system (SC@AP@INS) with a micro-nano structure was developed using nano-micelles (AP) based insulin delivery system cross-linked with pH-responsive sodium alginate hydrogel. In vitro experiment indicated that AP micelle promotes the speedy penetration of mucus and enhances the absorption of insulin. SC@AP@INS overcomes the gastrointestinal barrier, protects insulin from severe gastric conditions, and achieves a pH-responsive drug release in the intestine. In streptozotocin (STZ)-induced type 1 diabetic SD rats, the oral administration of SC@AP@INS exhibited a sustained and safer hypoglycemic effect than subcutaneous injection, while achieving an oral bioavailability of 12.91%. Additionally, SC@AP@INS effectively regulates the blood sugar of diabetic rats for a long time by simulating the action process of endogenous insulin. In vitro experiments and in vivo experiments show that the hydrogel has excellent biological safety. Taken together, the SC@AP@INS hydrogel has the advantages of convenient preparation and high utilization, conferring it with great potential for oral protein delivery.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yunzhong Tu,Lang Qiu,Xinyi Li,Jingwen Zhu,Junli Chen,Hongling Liu
Recently, flexible wearable electronic devices have attracted extensive attention as an alternative to traditional rigid metallic conductors in the fields of personal health monitoring, human motion tracking, and biomimetic skin, due to their unique properties. However, most current wearable sensing devices are generally limited by poor sensitivity, limited detection range, and the inability to integrate well with clothing. In this paper, a hydrogen-bonded crosslinked network based on sodium alginate (SA) and wool keratin (WK) non-covalently modified carbon nanotubes (CNTs) was rationally designed and fabricated into a flexible pressure sensor named as SA&WK/CNT sensor. The resulting sensor is capable of accurately detecting the motion of various joints, with a fast response time of 0.15 s, a high sensitivity of 4.32 kPa −1 , and an excellent strength of 17.57 MPa. Moreover, the SA1WK2/CNT15@fabric flexible sensor, prepared by combining plain weave fabric with SA1WK2/CNT15 composite, exhibits enhanced sensitivity of 13.33 kPa −1 . Notably, the flexible sensor demonstrates outstanding performance in practical applications, including handwriting recognition and precise motion detection. This work not only reveals the inherent piezoresistive excellence of protein-based flexible films but also establishes a novel paradigm for developing high-performance fabric sensors through synergistic integration with textile substrates, paving the way for wool keratin-based materials in next-generation wearable technologies and smart health monitoring systems.
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FOOD HYDROCOLLOIDS
·
2022
·
IF 11.504
Jiaqi Li,Sheng Geng,Shiyu Zhen,Xiaofan Lv,Benguo Liu
Whey protein isolate (WPI) is an important food supplement and natural surfactant. Emulsion systems based on WPI and WPI–polyphenol complex have been the focus of food delivery research. However, these emulsions are pH-sensitive, which limits their application. In this study, an emulsion stabilized by the WPI–phloridzin (PHL)–sodium alginate (SA) ternary complex was constructed for the first time, and its physicochemical properties were characterized. The results indicated that at pH 5.0, the ternary complex possessed higher stability than the WPI–PHL complex. Moreover, the ternary complex significantly enhanced the ABTS radical scavenging ability of PHL at pH 5.0. The emulsion stability increased with increasing SA proportion in the complex. The antioxidant activity and β-carotene retention capacity of the emulsion were also positively correlated with SA concentration. The results suggest that the emulsion stabilized by the WPI–PHL–SA ternary complex is a promising food delivery system.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Yangyang Duan,You Wu,Ru Yan,Meng Lin,Shengjun Sun,Houyi Ma
A self-strengthening coating with silver nanoparticles (Ag NPs) doped chitosan (CHI) and sodium alginate (SA) polyelectrolytes was constructed on the surface of polydopamine (PDA) coated Ti substrate by a layer-by-layer assembly method. The PDA coating exhibited an excellent bond with Ti substrate, and also can uniformly deposit Ag NPs via a mild method without introducing any exogenous reductant. The CHI coating was assembled through a spin-coating method for controlling Ag + release. The SA was introduced to enhance the anticorrosion performance by forming calcium alginate (CA) in a corrosive medium. The corrosion protection was investigated with electrochemical impedance spectroscopy and polarization curves tests in fluorine-containing artificial saliva. During immersion, the charge-transfer resistance and the protection efficiency ( ŋ ) presented a continuous increase with the immersion time, demonstrating that this coating possessed a remarkable self-strengthening capability, and the compositions of the outermost film changed from SA to CA with the Ca 2+ cations of the corrosive medium as a crosslinker by SEM and EDS analysis . Furthermore, the ŋ remained up to 96.8% after immersion of 30 days, and then the coating also displayed a distinct inhibition zone on S. mutans . These results prove this coating possesses an excellent anticorrosion performance and antibacterial property .
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Processes
·
2024
·Vol. 12
·期 4
·842
·
IF 2.8
Yan Li,Yu Ma,Fan Chang,Haiyun Zhu,Chengshan Tian,Fengan Jia,Yang Ke,Jiakun Dai
Using slow-release fertilizer is one of the sustainable strategies to improve the effectiveness of fertilizers and mitigate the environmental pollution caused by excess usage of fertilizer. In this study, a slow-release urea fertilizer with water retention and photosensitivity properties was prepared by a two-step method. It was characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy and an infrared camera. This fertilizer can prolong the release period of urea, improve water-retention capacity of soil, and carry out photothermal conversion under illumination. Comparing four release kinetics models, the Ritger–Peppas model was the best fitting model for releasing behavior in soil, and diffusion followed the Fickian mechanism. The application of fertilizer on winter wheat was carried out to intuitively evaluate the fertilizer’s effects on promoting plant growth and resisting water stress. Thus, this study provides a new strategy for improving fertilizer utilization rate and maintaining soil moisture, which will be beneficial for sustainable agriculture.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 41
·17891-17899
·
IF 2.7
Xiang Liu,Weiyi Li,Ping Wang,Zheng Xing
In recent years, hydrogels have been employed to fabricate flexible capacitors (FCs) and wearable sensors. However, achieving a balance between the electrochemical and mechanical properties of hydrogels remains a challenge. Herein, polyacrylamide/sodium alginate (PAM/SA) dual-network hydrogels with good mechanical properties and high electrochemical properties were obtained by nitric acid (HNO3) mediation. The –COO– groups on the SA network inside the hydrogel are partially acidified to –COOH under the action of HNO3, which increases the hydrogen bond density of the hydrogel. The PAM/SA hydrogel exhibited a maximum mechanical strength of 83.4 KPa and a maximum elongation at break of 471.3%. Furthermore, the conductivity (σ) of PAM/SA dual-network hydrogels increased from 36.48 mS cm−1 to 96.4 mS cm−1, and the specific capacitance of the flexible capacitor (FC) composed of the hydrogels increased by about 142.1%. Finally, the hydrogel was prepared as a wearable motion sensor, which is capable of accurately detecting the different motion states of a person. Consequently, the hydrogel has a multitude of applications in the field of FCs and wearable sensors.
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高影响因子
Applied Materials Today
·
2024
·
IF 7.2
Hao Huang,Minjie Fan,Anchun Yang,Dongbiao Chang,Jinsheng Li,Liwen Yang,Xinlun Li,Mengyuan Wang,Pengfei Zheng,Tailin Guo,Jie Weng
β-tricalcium phosphate (β-TCP) has been widely applied in tissue engineering due to its excellent biocompatibility, degradability, and ability to induce mineralization. Zinc ion (Zn 2+ ) displays excellent antibacterial properties and a vital role in regulating cell metabolism. In this context, the incorporation of Zn 2+ into β-TCP to prepare Zn-doped β-tricalcium phosphate (Zn-β-TCP), emerges as a promising strategy for treating dentin hypersensitivity. However, delivering Zn-β-TCP effectively to the dentin surface for inducing mineralization of dentinal tubules remains a considerable challenge. In this study, we developed a sodium alginate-polyethylene glycol paste loaded with Zn-β-TCP particles, aiming to deliver Zn-β-TCP to the dentin surface for inducing mineralization. Zn-β-TCP particles were synthesized by the hydrothermal method and were combined with a sodium alginate-polyethylene glycol solution to create the Zn-β-TCP/sodium alginate/polyethylene glycol (Zn-β-TCP/SA/PEG) paste. In vitro experiments demonstrated that Zn-β-TCP could induce mineralization, exert good biocompatibility and antibacterial activity, promote dentin differentiation of dental pulp stem cells. Furthermore, Zn-β-TCP/SA/PEG exhibited excellent viscosity and effectively prompted the formation of a mineralized layer on dentin surfaces, successfully blocking dentinal tubules. Taken together, the present study demonstrated the potential of the Zn-β-TCP/SA/PEG paste as a promising therapeutic material for the treatment of dentin hypersensitivity.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Chuanbo Ding,Jiali Yang,Ning Wang,Qiteng Ding,Shuwen Sun,Yang Gao,Liqian Shen,Ting Zhao,Yue Wang
Diabetic wounds are typically chronic wounds and the healing process is limited by problems such as high blood glucose levels, bacterial infections, and other issues that make wound healing difficult. Designing drug-loaded wound dressings is an effective way to promote diabetic wound healing. In this study, we developed an SA/PVA nanofiber (SPS) containing Shikonin (SK) for the treatment of diabetic wounds. The prepared nanofibers were uniform in diameter, had good hydrophilicity and high water vapor permeability, and effectively promoted gas exchange between the wound site and the outside world. The results of in vitro experiments showed that SPS was effective in antimicrobial, antioxidant, and biocompatible. In vivo tests showed that the wound healing rate of mice treated with SPS reached 85.5 %. Immunohistochemical staining results showed that SPS was involved in the diabetic wound healing process through the up-regulation of growth factors (CD31, HIF-1α) and the down-regulation of inflammatory factors (CD68). Western blotting experiments showed that SPS attenuated the inflammation through the inhibition of the IκBα/NF-κB signaling pathway. These results suggest that SPS is a promising candidate for future clinical application of chronic wound dressings.
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PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Jiajun An,Xiaofan Ping,Gang Gao,Qinghe Shen,Zhiqiang Wang,Cunfu Zhang,Haitang Bu,Zizhen Lin,Congliang Huang
To explore high-performance thermal insulation materials for green buildings, the sodium-alginate/chitosan (AC) biomass aerogel was firstly prepared, which has a potential advantage of low thermal conductivity and also low price. Then, the montmorillonite (MMT) was further coated on the pore surface of the AC aerogel to improve its poor flame-retardancy performances. This new aerogel is called ACMMT. Finally, the flame-retardant, mechanical and thermal insulation performances of ACMMT aerogels were analyzed. Results turn out that: The limiting oxygen index of ACMMT with a MMT content of 70 wt% (ACMMT-70 %) is increased by 205 % times compared to that of the AC aerogel, and the mass-loss rate of ACMMT-70 % is only about 13.8 %. This enhanced flame-retardant performance of ACMMT can be explained by the MMT isolation layer formed on the pore surface of AC aerogel, hindering the spread of oxygen and heat, thus restricting the spread of flames. The mechanical performance of ACMMT aerogel is also improved, because of the hydrogen bond formed between MMT and AC, which can better support the skeleton structure. The thermal conductivity of ACMMT-70 % aerogel is about 0.0384 W m −1 K −1 , much lower than that of most existing commercial materials. Importantly, when the ACMMT-70 % aerogel is heated by a 100 °C heat source, the upper surface of the ACMMT-70 % aerogel could maintain a temperature of 37 °C for a long time, showing excellent thermal insulation performance.
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