FOOD CHEMISTRY
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2022
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IF 9.231
Jiaqing Huang,Cailin Qiao,Xinrou Wang,Yuwei Gao,Jinsong Zhao,Huibo Luo,Yongzhong Wang,Changjun Hou,Danqun Huo
Pichia kudriavzevii was one of the important aroma-producing fungi in the solid-state fermentation of Baijiu, and immobilization was an effective strategy for improving microbial performance. Herein, P. kudriavzevii cells were immobilized in a gel network that crosslinked by chitosan and sodium alginate to form sodium alginate/chitosan- P. kudriavzevii microspheres (SA/CS-PMs). Their structural characteristics and formation processes were characterized by SEM and FT-IR. The effect of synthesis conditions on the performance of microspheres were determined by single-factor experiments. Under the optimal conditions, the SA/CS-PMs could increase the amylase activity of the fermentation broth by 57.18%, the esterase activity by 66.13%, the content of ester by 67.04%, and could be reused at least three times. Further research results indicated that the content of ester could be increased significantly in Baijiu solid-state fermentation with the SA/CS-PMs. In conclusion, the SA/CS-PMs could improve the ester production ability of P. kudriavzevii by increasing the esterase activity, which was a valuable exploration of directional biosynthesis and a feasible strategy to improve solid-state fermentation quality.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Ruifeng Zhu,Xiaotong Fu,Shengnan Jin,Rui Ma,Zhibin He,Dan Zhang,Zhu Long
Despite many technical challenges in the development of safe and environmentally friendly food packaging paper materials with excellent water and oil resistance using simple methods, producing paper-based functional materials using bio-based polymers is currently an important topic in the food packaging industry. In this study, novel water and oil-resistant coatings for the paper were developed through the combination of sodium alginate (SA), hydroxypropyl methylcellulose (HPMC), polyvinyl butyral (PVB), and hydrophobic silica nanoparticles (HSNPs). To impart oil-repellency to paper, SA and HPMC were first mixed uniformly and coated on the base paper, which was pre-treated with calcium chloride solution. A compact and tough coating layer was formed on paper due to the hydrogen bonding between SA and HPMC molecules, and the crosslinking between SA and Ca 2+ ions in the base paper. High water resistance of the paper was achieved through the coating of PVB and HSNPs on top of the coating of SA/HPMC. The final coated paper demonstrated outstanding oil resistance (kit rating: 12/12), water resistance (Cobb value: 4.23 g/m 2 ), low water vapor transmission rate (100 g/m 2 ·24 h), and improved mechanical properties. This fluorine-free, and biodegradable barrier paper will find excellent applications in the food packaging industry.
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Ying Zhang,Ting-Ting Li,Bing-Chiuan Shiu,Jia-Horng Lin,Ching-Wen Lou
The protective clothing may face acid, high temperature, and bacterial attack in the process of use, affecting its protection efficiency, and multifunctional protective clothing that can meet a variety of needs appear more potential applications. However, multifunctional personal protection clothing has remained an unmet challenge. Here we report a new type of multifunctional clothing via a simple, environmentally friendly wet spinning method to load the urushiol with acid corrosion and antibacterial functions on sodium alginate fiber. This structure uniformly disperses a certain content of urushiol in sodium alginate solution, allowing alginate fibers to have flame retardant properties while having high acid resistance and excellent targeted antibacterial properties. Compared to alginate fibers, the fabricated fibers were treated with different concentrations of sulfuric acid, although the strength was reduced to a certain extent, the fibers retained their original shape and were not dissolved. The thermal analysis showed the fiber also has good flame retardant better than viscose fiber. In addition, the fabricated fiber has targeted antibacterial properties, with an efficiency of 99.99% against Staphylococcus aureus ( S. aureus ) and bacteriostatic effect on Escherichia coli ( E. coli ) , and good biocompatibility under low concentration conditions. Our work may provide new insights for the development of “green” multifunctional protective clothing. It also provides a research possibility for absorbable surgical sutures.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
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IF 8.025
Juan Zhang,Yanen Wang,Qinghua Wei,Yanmei Wang,Mingyang Li,Dinghao Li,Longyu Zhang
Self-healing hydrogels have great application potential in the field of bio-sensors due to their self-healing, flexibility and excellent tensile properties. However, most hydrogel-based sensors are processed by template method, which is unable to fabricate complex three-dimensional (3D) structures, and limits the development of hydrogel-based sensor devices. A simple yet efficient one-pot method was proposed to fabricate polyvinyl alcohol/sodium tetraborate/sodium alginate hydrogel inks (SPB), also a fabricating process of self-healing hydrogel based on 3D printing technology has been proposed. The SPB hydrogel rapidly healed (<30 s) at room temperature, while its mechanical properties and conductivity also recovered quickly after healing. Besides, it could be used as wearable strain sensors, whose high stretchability (>2800 % strain) and sensitivity (gauge factor: 18.56 at 2000 % strain) could not only detect very large stretch deformations, but also detect the tiny pressure changes in the human body, such as finger flexion, knee flexion, and respiration. This study provides a method for the rapid fabrication of complex-structured hydrogel-based sensors, which is helpful for the hydrogel-based sensor applications in human motion detection and wearable devices.
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EUROPEAN JOURNAL OF PHARMACEUTICAL SCIENCES
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2021
·
IF 4.384
Shuangqing Wang,Zhonggao Gao,Lei Liu,Mingxin Li,Along Zuo,Jianpeng Guo
This paper describes the development of a film comprising chitosan (CS), sodium alginate (SA), and ethyl cellulose (EC) for buccal mucosal administration. A film of CS-SA unidirectional release drug-containing water-repellent layer EC was produced by interfacial reaction solvent-drying technique using self-made equipment. The CS-SA-EC film had superior mechanical properties compared to CS-EC and SA-EC films. The existence of the amide bond was confirmed by FT-IR. DSC confirmed that the drug was dispersed in the carrier material in an amorphous form. The drug release studies emerged that the model drugs from CS-SA-EC films presented better release properties. The Ritger-Peppas model best describes all ratios of drugs release mechanisms. The permeability characteristics of the films were evaluated in the TR146 cells model and the rabbit buccal mucosae. The cumulative penetration amounts of the model drugs were significantly increased. The permeability mechanism of the film was studied preliminarily using immunofluorescence and Western Blot. The results showed that the film inhibited the expression of ZO-1 protein, and the expressive trend of ZO-1 protein was consistent with the results of in vitro permeation experiments. The pharmacokinetics of the drugs loaded films were evaluated and compared with oral administration in rats. The relative bioavailability of the model drugs was 246.00% (Zolmitriptan) and 142.12% (Etodolac) relative to oral administration. The results of this study demonstrate the potential of CS-SA-EC vehicle in buccal mucosa drug delivery.
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Food Packaging and Shelf Life
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2021
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IF 6.429
Xinyu Sun,Hui Zhang,Jiao Wang,Mengna Dong,Pei Jia,Tong Bu,Qinzhi Wang,Li Wang
Sodium alginate (SA)-based films with excellent antioxidant and antibacterial activities were prepared, which was modified by polyphenol-rich kiwi peel extracts (PE) bio-reduced silver nanoparticles. In detail, PE was employed as reducing and capping agents to self-assemble silver@PE nanoparticles (Ag@PE NPs), which was further used to modify SA film in its functionality. In addition, the effects of the Ag@PE NPs amount on the physicochemical and biological performances were investigated. Results showed that SA-based films had strong tensile strength, water vapor resistance and good UV barrier properties. The incorporation of Ag@PE NPs drove a color change of SA-based films to redness and yellowness, while still showing good transparencies. Besides, Ag@PE NPs modified SA-based films showed a significant enhancement of antioxidant property, as well as an obvious improvement of antibacterial activity against S taphylococcus aureus and Escherichia coli . Therefore, this study provided a new insight for the reutilization of kiwi peels and a green, cheap and easy approach to prepare multifunctional SA-based food packaging films.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
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IF 6.953
Yuqi Wang,Hiba Shaghaleh,Youself Alhaj Hamoud,Shuangsheng Zhang,Pengfei Li,Xu Xu,He Liu
In order to circumvent the water eutrophication caused by nitrogen loss in agriculture, slow-release and high-water containing fertilizers have captured much attention. Considering the unstable release of traditional slow-released fertilizers, novel strategies need to be designed to meet the steady release of fertilizers. Herein, by integrating cellulose-based hydrogel with MIL-100(Fe), a pH-sensitive Cellulose/MOFs hydrogel (CAM) with a high surface area (45.25 m 2 /g) was devised. The volume changes and the water adsorption of the hydrogels were uncovered from pH 3 to pH 11, where the highest water adsorption (100 g/g) was achieved at pH 11. Besides, a pH-sensitive urea slow release fertilizer (U-CAM) was also designed. The urea release of the U-CAM at pH 11 was much slower than that of the U-CAM at pH 3, which indicated its potential application in arid regions. In parallel with a favorable water-holding capacity, the totally loss of the soil moisture loaded with U-CAM was slowed down by 18 days as compared with the pure soil. The positive effect of the U-CAM on the growth of wheat was indexed with the germination rate, number of tillers, photosynthetic rate and chlorophyll content of the crop, which verified their further application in irrigating farming.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Jie Zhang,Hui-Yuan Zhang,Wen-Rong Xu,Yu-Cang Zhang
Efficient utilization of natural biomass for the development of fireproof materials and next-generation sensors faces various challenges in the field of fire safety and prevention. In this study, renewable sodium alginate (SA), TEMPO-oxidized chitin nanocrystals (TOChNs), and MXene nanosheets were employed to fabricate a sustainable, flexible, and flame-retardant composite biofilm, donated as STM, utilizing a simple and environmentally friendly evaporation-induced self-assembly technique. The incorporation of SA , TOChNs, and MXene in a weight ratio of 50/10/40 led to improved mechanical properties of the resulting STM-40 films, as evidenced by increased tensile strength and Young's modulus values of approximately 36 MPa and 4 GPa, respectively. Notably, these values were approximately 3 and 11 times higher than those observed for the pure SA film. Moreover, the STM-40 films demonstrated highly sensitive fire alarm capabilities, exhibiting a superior flame alarm response time of 0.6 s and a continuous alarm time of approximately 492 s when exposed to flames. The STM exhibited exceptional flame retardancy due to the synergistic carbonization between MXene and SA/TOChNs, resulting in a limiting oxygen index of 45.0 %. Furthermore, its maximum heat release rate decreased by over 90.1 % during the test. This study presents a novel approach for designing and developing fire-retardant fire alarm sensors by utilizing natural biomass.
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INDUSTRIAL CROPS AND PRODUCTS
·
2023
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IF 5.9
Chonghao Zhu,Shengming Zhang,Cheng Yi,Ziyang Heng,Zijian Wang,Chenghai Liu,Xianzhe Zheng
To develop sustainable agriculture and improve the fertilizer utilization value of straw resources, a biomass-based material aminated rice straw/oxidized sodium alginate/iron(III) (ARS/OSA/Fe 3+ ) with a slow-release function was developed. The preparation conditions were determined as follows: 1.67 g of ARS, 3.33 g of OSA, and 50 mL of distilled water were mixed and stirred at room temperature for 12 h to obtain the ARS/OSA colloid; the colloid was added to 100 mL of Fe(NO 3 ) 3 solution at the concentration of 6% and stirred at room temperature for 1 h to obtain the ARS/OSA/Fe 3+ . ARS/OSA/Fe 3+ was the small circular flakes with 2–2.5 mm in diameter and 1 mm in thickness, in which the content of iron was 9.9% by weight. It showed good slow-release performance in soil. The iron(III) release rates of 1-day and 30-days were 2.18% and 64.02%, respectively. Kinetic analysis showed that the release mechanism of ARS/OSA/Fe 3+ in soil may be dissolution followed by swelling diffusion and finally dissolution diffusion. The combination of FT-IR, XRD , XPS , DSC , and SEM analysis showed as follows: the amination process occurred on lignin in the rice straw lignocellulose ; ARS and OSA were crosslinked to form a polymer with a crosslinked network structure; the ferric elements mainly existed in trivalent form; and the ARS/OSA/Fe 3+ was synthesized through the coordination modes of carboxylate anion to iron(III) cations. ARS/OSA/Fe 3+ has the potential to be developed as base fertilizers and soil amendments in agricultural production.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 49
·108230-108246
·
IF 5.8
Zhang Xiao,Luo Shiwen,Duan Jiaxin,Lan Tao,Wei Yun
Adsorption is an effective method for the removal of hazardous substances from wastewater. In this work, a low-cost and environmental-friendly composite hydrogel material of sodium alginate doped with nitrogen doped carbon dots (SA@NCDs) was fabricated by impregnation for lanthanide and enhanced phosphorus adsorption in wastewater. The effects of NCDs doping amount, dosage, pH, initial solution concentration, adsorption time and temperature on the process of La (III) adsorption by SA@NCDs were investigated. The adsorption isotherms fitted to Langmuir isotherm model (R 2 = 0.9970–0.9989) and the adsorption kinetics followed pseudo-second-order kinetic model (R 2 = 0.9992). The maximum adsorption capacity of the adsorbent for La (III) was 217.39 mg/g according to the Langmuir model at 298.15 K. After five cycles, the removal efficiency of La (III) adsorbed by SA@NCDs was still 85.1%. Moreover, the loaded La (III) enhanced the adsorption of phosphorus. The La (III)-SA@NCDs-5 hydrogel adsorbent greatly improved the adsorption capacity for phosphorus compared with the La (III)-free adsorbent, and the adsorption amount can reach 9.64 mg-P/g. The SA@NCDs complex hydrogels for rare earth adsorption were prepared by introducing NCDs rich in amino group into SA hydrogels. The introduction of NCDs increases the adsorption sites of hydrogels, and also overcomes the problem that NCDs itself is difficult to recover in wastewater treatment applications. The lanthanide adsorbed material has a stable structure and can be used to remove phosphorus to deal with waste using the waste. It indicates the SA@NCDs hydrogel composite adsorbent have good potential for wastewater treatment. Graphical Abstract
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POLYMER BULLETIN
·
2023
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IF 3.2
Hua Bingyan,Wei Hongliang,Hu Chunwang,Zhang Yaqi,Yang Shuai,Wang Gang,Guo Tao,Li Jingjing
Herein, a semi-interpenetrating network (semi-IPN) hydrogel (SH/PNA) was prepared by simple free radical polymerization using N-isopropylacrylamide and 2-acrylamide-2-methylpropanesulfonic acid as monomers, poly(ethylene glycol) dimethacrylate as a crosslinking agent, and sodium alginate and humic acid as filled biomolecules. Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction, and rheometer were used to characterize the structure and properties of the samples. The effect of feeding ratios on the gel mass fraction and swelling properties of the SH/PNA hydrogel was explored to optimize its preparation conditions. The swelling behavior under different pH and temperatures was investigated. The experimental result showed that the SH/PNA hydrogel had excellent water absorption capacity and pH/temperature dual responsiveness. Moreover, SH/PNA hydrogel was used as a carrier of urea to prepare slow-release and water-retention fertilizer by in situ loading method, and slow-release properties of urea in water and soil were measured. Taking into account its good ability for controlled release and water retention, the WSRF was expected to be a promising low-cost, environmentally friendly fertilizer that can be used in agriculture and horticulture.
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FOOD CHEMISTRY
·
2023
·
IF 8.8
Bohai Guo,Yun Sun,Qiuyue Guan,Zheng Luo,Lian Zhou,Zhenlan Xu,Jianzhong Han,Daofeng Qu
A smart film was developed to detect the freshness of pork by incorporating blueberry anthocyanins (BAs) and hinokitiol (HIN) loaded zeolite-imidazolium framework (HIN@ZIF-8) with into a sodium alginate matrix, and its microstructure and physicochemical properties were studied. The SA matrix was doped with BAs and HIN@ZIF-8 nanoparticles (SA-BAs/HIN@ZIF-8) to increase its tensile strength and reduce its water vapor permeability. HIN@ZIF-8 has low cytotoxicity, and SA-BAs/HIN@ZIF-8 membranes have long-lasting antimicrobial and highly sensitive color development properties against Escherichia coli and Staphylococcus aureus . The results of pork preservation experiments showed that SA-BA/HIN@ZIF-8 could extend the shelf life of pork to 6 days at 4 ℃. E-nose evaluation experiments showed that SA-BAs/HIN@ZIF-8 could inhibit compounds that cause unpleasant and irritating odours. Therefore, SA-BAs/HIN@ZIF-8 was considered to be an effective method to improve the freshness of pork, and the results showed that it has a promising application in food preservation.
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