ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Hai Chao Yu,He Zhang,Kefeng Ren,Zhimin Ying,Fengbo Zhu,Jin Qian,Jian Ji,Zi Liang Wu,Qiang Zheng
Designing tough biopolymer-based hydrogels as structural biomaterials has both scientific and practical significances. We report a facile approach to prepare polysaccharide-based hydrogel films with remarkable mechanical performances and antiadhesion property. The hydrogel films with a thickness of 40–60 μm were prepared by mixing aqueous solutions of κ-carrageenan (κ-CG) and protonated chitosan (CS), evaporating the solvent, and then swelling the casted film in water to achieve the equilibrium state. The obtained κ-CG/CS gel films with a water content of 48–88 wt % possessed excellent mechanical properties with a breaking stress of 2–6.7 MPa and a breaking strain of 80–120%, superior to the most existing biopolymer-based hydrogels. The extraordinary mechanical properties of gel films obtained over a wide range of mass ratio of κ-CG to CS should be rooted in the synergistic effect of ionic and hydrogen bonds between the κ-CG and CS molecules. In addition, the tough gel films showed good self-recovery ability, biocompatibility, and cell antiadhesion property, making them promising as an artificial dura mater and diaphragm materials in the surgery. The design principle by incorporating multiple noncovalent bonds to toughen the biopolymer-based hydrogels should be applicable to other systems toward structural biomaterials with versatile properties.
研究领域:
材料科学
·
生物医学工程
·
生物材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL PHYSICS
·
2020
·
IF 1.771
Xiaoxing Lu,Shaoxia Xie,Lihong Wang,Hujun Xie,Qunfang Lei,Wenjun Fang
Lysozyme (LYS) and κ-carrageenan (κ-CRG) are important components widely used in food and pharmaceutical products. In this work, we investigated the interactions in the aqueous mixtures of LYS and κ-CRG and the structural transformation of the LYS/κ-CRG complexes. When co-soluble polymers and soluble complexes are formed in near-neutral environment, insoluble complex coacervates are formed at lower pHs. Significant accumulation and size expansion of coacervate particles occur at pH = 4.0 where maximum interactions are presented at the mixing ratio of LYS/κ-CRG = 2:1. The coacervate system is flexible to rearrange to reach a charge balanced state by gradual protonation of LYS and κ-CRG. Addition of NaCl up to 50 mM weakens the electrostatic attractions among the aggregates through counterion binding. Thermal stability of LYS by forming complex coacervates differs from that in water, and effective protection of protein is achieved as the unfolding temperature is increased by 9 °C.
研究领域:
食品科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2014
·
IF 5.211
Yang Fan,Xin Yang,Bing Zhu,Pei-Fang Liu,Hai-Ting Lu
The polysaccharide carrageenan is used as a natural precursor to prepare micro-mesoporous carbon spheres. The carbon spheres were synthesized by hydrothermal carbonization of carrageenan, and subsequent chemical activation by KOH at different temperatures. The obtained micro-mesoporous carbon spheres have high surface area (up to 2502 m 2 g −1 ) and large pore volume (up to 1.43 cm 3 g −1 ). Moreover, the micro- and mesoporosity can be finely tuned be modifying the activation temperatures in the range of 700–900 °C. The carbon spheres activated at 900 °C present high specific capacitance of 230 F g −1 at a current density of 1 A g −1 and good ion transport kinetics. The good capacitive performance can be ascribed to the high specific surface area, well-controlled micro- and mesoporosity and narrow pore size distribution .
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2022
·
IF 11.504
Liang Zhang,Wenze Wang,Yongsheng Ni,Chengyuan Yang,Xinyi Jin,Yuxuan Wang,Yanyu yang,Yezi Jin,Jing Sun,Jianlong Wang
To combat the kumquat rot triggered by food-borne microorganisms, this work pioneered the concept of pseudo-pasteurization and integrated it with packaging technology to develop a novel antibacterial packaging film for the storage and preservation of kumquats. In detail, ZnO-doped carbon nanoparticles (ZnO/C) with excellent photothermal properties were first constructed by annealing the ZIF-8 precursor, and then incorporated into the K-carrageenan (KC) matrix as a filler to obtain a series of ZnO/C-KC nanocomposite films. The as-prepared ZnO/C-KC films exhibited the outstanding antibacterial properties (Antibacterial rate ≥99.8%) by virtue of the synergistic effect between NIR-induced autogenous heat and coexisting ZnO components, wherein the equilibrium temperature (60–62 °C) and holding time (5 min) of the film sterilization were significantly lower than that of the traditional pasteurization . The extended shelf-life of kumquats further confirmed the enhanced preservation capacity of ZnO/C-KC films. Furthermore, with the embedding of ZnO/C particles, although the color and transparency of films were slightly lost, the tensile strength, thermal stability, hydrophobicity, and barrier ability have been improved to varying degrees. Finally, the qualified safety of films was also verified through hemolysis and cell cytotoxicity experiments. The successful construction of this antibacterial film may provide new ideas for the innovation of traditional pasteurization and the functionalization of packaging films.
研究领域:
食品科学
·
材料科学
·
包装技术
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生物技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2022
·
IF 4.855
Jie Liu,Yitong Dong,Zhengxin Ma,Zhilu Rao,Xuejing Zheng,Keyong Tang
This study aimed to develop nanocomposite films based on a soluble soybean polysaccharide (SSPS), carrageenan (CG), and green synthesized silver nanoparticles (AgNPs) by a solution casting technique. AgNPs were obtained by reducing a silver–ammonia complex using a SSPS as both a stabilizing and reducing agent, which was confirmed by UV–vis spectroscopy, X-ray diffraction (XRD), transmission electron microscopy, and X-ray photoelectron spectroscopy. CG was introduced into the SSPS/AgNP matrix as a reinforcing component to strengthen the nanocomposite films. The results indicate that the addition of CG led to significantly enhanced mechanical properties, thermal stability, and water resistance of the films. The XRD and Fourier transform infrared spectroscopy results reveal strong interactions between AgNPs and polysaccharide chains. Compared with the SSPS/CG films without AgNPs, the SSPS/CG/AgNP nanocomposite films exhibited antibacterial activity against Escherichia coli and Staphylococcus aureus. The results suggest that the SSPS/CG/AgNP antibacterial nanocomposite films have great potential in food and pharmaceutical packaging applications.
研究领域:
食品科学
·
材料科学
·
生物技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FOOD ENGINEERING
·
2022
·
IF 6.203
Wenrui Chi,Wenhua Liu,Shiyu Xu,Xianxu Zhan,Jian Li,Lijuan Wang
In order to solve the problem that polysaccharide-based films cannot be heat-sealed into bags because their glass transition temperature is higher than the decomposition temperature. In this study, the anionic κ-carrageenan (κC) was transformed to a film to investigate the sealing procedure inevitable to produce bags. We propose a heat-free glue-sealing strategy that chitosan quaternary ammonium salt (CQAS) was used as a bio-glue to seal κ-carrageenan film (κCF) for food packaging by an electrostatic force, which were demonstrated by thermal stability and the light transmittance of the κC-CQAS. An increase in CQAS concentration resulted in an increase in sealing strength. After 75 d, the peroxide value (POV) of beef tallow packed in the glue-sealed κCF bags was 0.0713 g/100 g, which was lower than that of 0.1087 g/100 g in polyethylene (PE) bags. The mass of P-κC-CQAS decreased by 3.22% in soil after 21 d. This study provides a feasible, energy-saving and green strategy to produce anionic polysaccharide film bags to replace some of the plastic bags.
研究领域:
食品科学
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材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Minerals
·
2022
·Vol. 12
·期 10
·1234
·
IF 2.818
Zhiqiang Zhao,Yangjia Hu,Jianhua Chen,Yangge Zhu,Liang Lu,Wei Xiong,Sigang Luo
In order to achieve the effective separation of copper-molybdenum in the presence of xanthate and kerosene, carrageenan was explored as a novel environmentally friendly molybdenite depressant in this work. The flotation behavior of molybdenite was studied by micro-flotation tests, and the depression mechanism was investigated through zeta potential, Fourier Transform Infrared Spectroscopy (FTIR) and atomic force microscope (AFM) analysis. The flotation results showed that molybdenite was significantly depressed by carrageenan in the pH range of 6–12 even in the presence of xanthate and kerosene. Zeta potential, FTIR and AFM measurement demonstrated that carrageenan could adsorb strongly on the molybdenite surface and change the surface wettability of molybdenite, thus significantly reducing the floatability of molybdenite.Keywords:flotation;molybdenite;separation;carrageenan;depressant
研究领域:
矿物加工
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环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
·
IF 8.2
Changling Wu,David Julian McClements,Bohui Ma,Zhiquan Lai,Fenghua Wu,Xingquan Liu,Peng Wang
Currently, there is great interest in converting edible agro-waste, such as okara from soybean production, into value-added products. For this study, we focus on fabricating composite hydrogels from okara cellulose nanofibers (CNFs) and carrageenan (CA). We also examined the effects of TEMPO oxidation of the okara CNFs, as well as CA concentration, on the microstructure and physicochemical properties of the composite hydrogels. The water holding capacity, oil holding capacity, surface tension, gel strength , and viscoelasticity of the composite microgels increased with increasing CA concentration, and it was found that the highest values were obtained for TC-CA2 hydrogel: contact angle = 43.6° and surface tension = 45.12 mN/m, which was attributed to the formation of a more regular and dense three-dimensional gel network. All the CNF-CA microgels had highly anionic ζ-potential values (−38.8 to −50.1 mV), with the magnitude of the negative charge increasing with TEMPO oxidation and carrageenan concentration. These results suggest there would be strong electrostatic repulsion between the composite hydrogels. The composite microgels produced in our work may be useful functional materials for utilization within the food industry, thereby converting a waste product into a valuable commodity.
研究领域:
食品科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2024
·
IF 6
Guanchen Wu,Yongpeng Yin,Cuiping Li,Ruijie Hao,Jiaxiang Zang,Mengyao Kang,Denglin Luo,Wei Xu
In this study, the gelation mechanism of konjac glucomannan (KGM)/κ-carrageenan (KC) composite hydrogels at different mass ratios and its controlled release ability to lysozyme (Ly) were investigated. With the increase of KGM proportion, water holding capacity (WHC) and hardness first increased and then decreased, and reached the maximum when the mass ratio of KGM to KC was 1:2. Rheological tests showed that the viscoelasticity of the composite hydrogels can be effectively adjusted by changing the mixing ratio of KGM and KC. Fourier transform infrared spectroscopy (FTIR) and thermogravimetry confirmed that the thermal stability of the composite hydrogels was enhanced by hydrogen bonding as the main interaction force between KGM and KC. The porous gel network was observed by scanning electron microscope (SEM). With the increase of KGM ratio, the pore size first decreased and then increased. In addition, adjusting the ratio of KGM and the pH of release environment can enhance the controlled release effect of KC on Ly by the in vitro release experiment of Ly. Overall, these findings provide a theoretical basis for the development of performance-enhanced composite hydrogels for drug-controlled release.
研究领域:
食品科学
·
生物材料学
✓ 已验证
产品关联
DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2019
·
IF 5.839
Yingying Dong,Chengrong Wen,Tingting Li,Chunhua Wu,Hang Qi,Miao Liu,Zhongli Wang,Beiwei Zhu,Shuang Song
The effects of positive and neutral charged amino acids (Arginine (Arg) and Glutamine (Gln)) on the gel properties and microstructure of potassium iota Carrageenan (KIC) were investigated. The findings suggested that the gel melting temperature (T g ) of KIC gels increased from 36 °C to 43 °C with the Gln concentration increasing, and the elastic modulus ( G’ ) increased as well. However, with the increase Arg concentration, T g and G’ of gels increased gradually and then decreased, and the maximum T g (46 °C) and G’ were obtained at concentrations of 0.05% Arg. LF-NMR results showed that the addition of Gln decreased the position of T 23 , indicating a negative effect of Gln on the water holding capacity and water mobility of KIC gels, while the addition of Arg increased the position of T 23 , showing the opposite effect. Compared to the pure KIC and Gln-KIC (GKIC), Arg-KIC (AKIC) showed a more regular network structure and a stronger water holding capacity . In addition, few chemical bonds were formed between amino acid and KIC. It is electrostatic attraction between KIC and Arg and the crowding of Gln that contributed to better gel properties. Taken together, our results provide insights for the further application of GKIC or AKIC gels in food and medical applications.
研究领域:
食品科学
·
生物化学
✓ 已验证
DOI
高影响因子
BIOMACROMOLECULES
·
2018
·
IF 5.738
Xin Song,Kang Wang,Cheng-Qiang Tang,Wen-Wen Yang,Wei-Feng Zhao,Chang-Sheng Zhao
The currently used hemoperfusion adsorbents such as activated carbon and ion-exchange resin show dissatisfactory hemocompatibility, and a large dose of injected heparin leads to the increasing cost and the risk of systematic bleeding. Natural polysaccharide adsorbents commonly have good biocompatibility, but their application is restricted by the poor mechanical strength and low content of functional groups. Herein, we developed an efficient, self-anticoagulant and blood compatible hemoperfusion adsorbent by imitating the structure and functional groups of heparin. Carrageenan and poly(acrylic acid) (PAA) cross-linked networks were built up by the combination of phase inversion of carrageenan and post-cross-linking of AA, and the formed dual-network structure endowed the beads with improved mechanical properties and controlled swelling ratios. The beads exhibited low protein adsorption amounts, low hemolysis ratios, low cytotoxicity, and suppressed complement activation and contact activation levels. Especially, the activated partial thromboplastin time, prothrombin time, and thrombin time of the gel beads were prolonged over 13, 18, and 4 times than those of the control. The self-anticoagulant and biocompatible beads showed good adsorption capacities toward exogenous toxins (560.34 mg/g for heavy metal ions) and endogenous toxins (14.83 mg/g for creatinine, 228.16 mg/g for bilirubin, and 18.15 mg/g for low density lipoprotein (LDL)), thus, highlighting their potential usage for safe and efficient blood purification.
研究领域:
生物医学工程
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
Food Bioscience
·
2023
·
IF 5.2
Jun-qi Zhan,Wen-tao Yu,Jing-jing Fu,Gao-shang Li,Ya-qin Hu,Yue-wen Chen
Surimi is a protein-rich food . The peptides hydrolyzed by surimi have many functional activities and showed strong antioxidant activity in ABTS free radical scavenging experiments, hydroxyl radical scavenging experiments and iron ion reduction experiments. The scavenging rates of ABTS ions, hydroxyl radicals and iron ions were 62.83%, 74.81% and 0.035 mg/mL, respectively. 3D printing ink was formulated by compounding carrageenan , xanthan gum and surimi peptides. The surimi polypeptide “ink” contains 3% carrageenan, 4% xanthan gum and 4 mg/mL surimi polypeptide. This “ink” not only has good printability, but also has stable antioxidant properties. The effect of the peptides on the printed structures can also be observed under an inverted fluorescence microscope . In the in vitro digestion experiment, the surimi polypeptide 3D printing ink added with carrageenan and xanthan gum can release most of the peptides. After in vitro digestion experiments, the antioxidant activity of surimi polypeptides increased. The above experiments have proved that surimi polypeptide is a high-quality raw material for preparing 3D printing ink.
研究领域:
食品科学
·
生物技术
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）