JOURNAL OF POLYMERS AND THE ENVIRONMENT
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2024
·
IF 4.7
Ma Jinjing,Yu Yu,Chu Deyu,Zhu Shaomin,Liu Qishun,Yin Heng
Chitin is the second most abundant biopolymer in the world after cellulose and commonly found in crustaceans. It is also the most abundant natural nitrogen-containing polysaccharide. The challenge in separation of chitin directly from snow crab ( Chionoecetes opilio ) shells is that the solvent used must be versatile in removing calcium carbonate and protein while also being efficient, environmentally friendly, and cost-effective. In this study, chitin was extracted from snow crab shells using a DES consisting of TEBAC and lactic acid. DES successfully removed minerals and proteins, with a deproteinization rate of 95.51% and a decalcification rate of 96.41%, while the purity of chitin was 91.15% and the yield was 21.31%. Furthermore, the extracted chitin has large pores on its surface, making it an ideal matrix for biomedical materials. This study provides an environmentally friendly and cost-effective solution for the utilization of crustacean waste using multifunctional DES.
研究领域:
生物化学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2024
·
IF 4.3
Xuebin Lu,Zhengya Gong,Zhihao Yu,Jian Xiong,Gaixiu Yang,Mengyan Guo,Yuxin Zhang,Yiming Li
Supercapacitors as one of the new energy storage devices have attracted much attention from researchers. The design and preparation of new electrode materials with high conductivity and energy density has become a frontier and key issue in the research of supercapacitor performance improvement. In addition, flow capacitor deionization (FCDI) relying on the working principle of supercapacitors is a promising technology for desalination and has received crucial attention. NiCo 2 S 4 (NCS) is a promising pseudocapacitive material with high electrical conductivity and ideal stability. In this study, sea urchin-like NiCo 2 S 4 electrode materials (CC@NCS) grown in situ on crab shell carbon (CC) were prepared by a simple molten salt-assisted hydrothermal two-step method. The composite successfully combined the properties of CC and NiCo 2 S 4 . The prepared material exhibited excellent electrochemical properties and energy storage performance. In the three-electrode system, the specific capacitance is up to 692.4 F/g at a current density of 0.5 A/g. Asymmetric supercapacitors assembled with CC as the negative electrode, CC@NCS as the positive electrode, and 3 M KOH as the electrolyte obtained high specific capacitance (0.5 A/g, 163.6 F/g) and high energy density (305.16 W/kg, 8.18 Wh/kg). The device also showed excellent cycling performance in the long cycle test (88.65 % retention after 5000 cycles). In addition, the FCDI device with this material as the flow electrode achieved a final conductivity of 15.16 μS/cm by electrosorption of a 1000 mg/L NaCl solution at a constant pressure of 1.2 V for 60 min along with an impressive average salt removal rate (0.0621 mg/cm 2 ·min −1 ) and charge efficiency value (90.79 %), and a low energy consumption value (0.02 kWh/mol). What's more, it also exhibited excellent desalination properties. This indicates that the composite is a promising active material for energy storage and desalination.
研究领域:
材料科学
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能源存储
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
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2024
·
IF 4.3
Yiming Li,Zhihao Yu,Mengyan Guo,Ming Zhang,Jian Xiong,Yina Qiao,Rui Zhang,Xuebin Lu
Carbon-based materials have become the most commonly used electrode materials for supercapacitors due to their simple production and low preparation cost. The preparation of hierarchical porous carbon materials with excellent properties using biomass materials is a very valuable study. Therefore, we used crab shells as carbon precursors to prepare crab shell-based carbon materials by using the self-templating method (CaCO 3 ) combined with low-temperature eutectic molten salt. When the composition of the eutectic salt was CaCl 2 /KCl (molar ratio of 43:57) and the mass ratio of crab shells to eutectic salt was 1:5, the prepared crab-shell-based carbon material (CC-CaK-5) exhibited excellent physical and electrochemical properties with high specific surface area (1193.7 m 2 g −1 ), rich heteroatom doping (O (7.83 %) and N (6.71 %)), and high specific capacitance (290 Fg −1 at 0.5 Ag −1 ).The CC-CaK-5//CC-CaK-5 devices assembled with CC-CaK-5 as the electrode material exhibited excellent electrochemical performance. At a current density of 1 Ag −1 , the capacitance value of the device remained at 93.11 % of the initial capacitance value after 5000 cycles. The energy density reached 6.95 Whkg −1 at a power density of 302.09 Wkg −1 and remained at 4.71 Whkg −1 at a power density of 13,037.54 Wkg −1 .
研究领域:
材料科学
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能源存储
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Food Science & Technology
·
2025
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IF 2.8
Yiruo Wang,Hongyu Gan,Qifeng Wei,Shanshan Wang,Xiulian Ren
Deep eutectic solvents (DESs) are considered green due to their low cost, nontoxicity, low flammability, and biodegradability. Although the DESs-based method has been applied for chitin extraction, the efficiency of protein leaching from crustacean shells and the cyclic performance of DESs have not been thoroughly evaluated. In this study, chitin was extracted from crab shells using the DES consisting of choline chloride and lactic acid, achieving a purity of up to 95.14% by optimizing the reaction conditions and minimizing energy consumption. The kinetics of protein leaching were investigated, revealing that protein first diffused across the surface of the shells and subsequently entered the DES through pore diffusion. Mechanistic analysis showed that lactic acid effectively removed calcium carbonate from the crab shells, while protein leaching primarily relied on hydrogen bonding interactions. During the extraction process, lactic acid was consumed to remove calcium carbonate, necessitating the addition of a certain amount of lactic acid after each cycle to maintain the optimal choline chloride/lactic acid ratio. The results demonstrated that the purity and yield of chitin extracted by the DES remained relatively stable after five cycles. This cycling method of the DES supplemented with lactic acid is expected to achieve green and sustainable extraction of high-purity chitin from crab shells.
研究领域:
生物化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
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2025
·Vol. 27
·期 8
·2319-2330
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IF 9.2
Yamei Zao,Muqiu You,Jieru Ma,Xiaoyu Du,Yongcan Jin,Dagang Li,Zhaoyang Xu,Chuchu Chen
Hydrogels are promising flexible substrates, yet their applications are always limited by their inferior mechanical robustness and lack of multifunctionality. Herein, inspired by flexible and robust molting crab shells, multifunctional ChMNF–PAA–ACC (CPA) hydrogels were developed by constructing a three-dimensional chitin micro-nanofiber (ChMNF) network with a layered structure, incorporated into an amorphous inorganic-based hybrid matrix of nano-segregated minerals (amorphous calcium carbonate, ACC) and protein-like acrylic acid (PAA) polymers. This preparation process enables a green and mild synthesis, employing sustainable ChMNF and ACC as biodegradable and biocompatible raw materials, with no need of complex treatments or costly functional agents. The resulting CPA hydrogels simultaneously feature high strength (∼28.6 MPa), optical clarity (high transmittance: ∼88.1%, low haze: ∼1.86%), good drying–swelling recycling properties, and intrinsic fluorescence and electrical conductivity, surpassing performances of most chitin fiber-reinforced gel materials. Owing to these merits, these CPA hydrogels can be assembled into multifunctional sensors to detect diverse external stimuli (such as strain, pressure, and temperature). Consequently, this dual bionic strategy provides an exciting idea for designing multifunctionally robust and transparent hydrogels, showing promising and sustainable potential in the application of flexible sensors.
研究领域:
材料科学
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生物医学工程
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化学工程
✓ 已验证
DOI
高影响因子
Biomass Conversion and Biorefinery
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2025
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IF 4.1
Cao Shuangming,Sun Jianguo,Liu Qian,Gu Yonghua
Crab shells, as the waste from seafood processing, are emerging as a valuable resource for recycling and environmental protection. By combusting the organic components of crab shells, the high-calcium crab shell ash (CSA) is produced. This ash serves as a promising raw material for CO 2 mineralization, contributing to energy conservation and emission reduction. In this study, the systematic mineralization experiment of CSA was conducted using wet carbonation, focusing on the effects of reaction temperature, liquid–solid ratio, particle size, and stirring speed on CO 2 mineralization. The optimal mineralization conditions were achieved at a temperature of 60 °C, a liquid–solid ratio of 10 mL/g, a stirring speed of 700 rpm, and a CSA particle size exceeding 200 mesh, resulting in a carbonation efficiency of 66.10%. Furthermore, we improved the mineralization process by modifying the CSA with Na 2 CO 3 and employing microwave treatment. The carbonation efficiency significantly increased to 71.80% with a Na 2 CO 3 concentration of 1.75 mol/L. Notably, microwave drying further enhanced the carbonation efficiency of CSA to 73.01%. Our findings contribute to a deeper understanding of CSA mineralization and establish a theoretical foundation and research direction for enhancing the carbon sequestration capacity and subsequent application performance of crustacean biomass ash.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2019
·Vol. 27
·期 4
·4520-4527
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IF 2.914
Guo Feng,Zhu Zihan,Zheng Zhangqin,Jin Ying,Di Xiaoxuan,Xu Zhonghao,Guan Hongwei
Rampant use of tetracycline in animal feed is a threat to food security, the environment, and human health because of the risk of drug residues. Therefore, it is necessary to establish a sensitive, efficient, and reliable method for qualitative and quantitative detection of tetracycline. In this paper, we synthesized fluorescent carbon dots (FCDs) by thermal cracking of crab shell waste, and obtained a fluorescence quantum yield of 30%. Characterization of the FCDs by transmission electron microscopy, Fourier-transform infrared spectroscopy, ultraviolet visible absorption spectroscopy, and photoluminescence spectroscopy showed that they were fluorescent and evenly distributed with an average size of approximately 10 nm. We designed a sensitive probe for detecting tetracycline using the fluorescence intensity change of the FCDs. This method is sensitive, inexpensive, and environmentally friendly. The concentration of tetracycline was examined by comparing the fluorescence intensities of the FCDs before and after tetracycline addition. The limit of detection for tetracycline was 0.005 mg/L (signal-to-noise ratio = 3), which is promising for method development.
研究领域:
分析化学
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食品安全
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
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2022
·Vol. 27
·期 15
·4720
·
IF 4.927
Xinjun Yu,Zengchao Jiang,Xiaodan Xu,Changyi Huang,Zheyi Yao,Xiao Yang,Yinjun Zhang,Dongsheng Wang,Chun Wei,Xuwei Zhuang
Chitin, the second richest polymer in nature, is composed of the monomer N-acetylglucosamine (GlcNAc), which has numerous functions and is widely applied in the medical, food, and chemical industries. However, due to the highly crystalline configuration and low accessibility in water of the chitin resources, such as shrimp and crab shells, the chitin is difficult utilize, and the traditional chemical method causes serious environment pollution and a waste of resources. In the present study, three genes encoding chitinolytic enzymes, including the N-acetylglucosaminidase fromOstrinia furnacalis(OfHex1), endo-chitinase fromTrichoderma viride(TvChi1), and multifunctional chitinase fromChitinolyticbacter meiyuanensis(CmChi1), were expressed in thePichia pastorissystem, and the positive transformants with multiple copies were isolated by the PTVA (post-transformational vector amplification) method, respectively. The three recombinants OfHex1, TvChi1, and CmChi1 were induced by methanol and purified by the chitin affinity adsorption method. The purified recombinants OfHex1 and TvChi1 were characterized, and they were further used together for degrading chitin from shrimp and crab shells to produce GlcNAc through liquid-assisted grinding (LAG) under a water-less condition. The substrate chitin concentration reached up to 300 g/L, and the highest yield of the product GlcNAc reached up to 61.3 g/L using the mechano-enzymatic method. A yield rate of up to 102.2 g GlcNAc per 1 g enzyme was obtained.Keywords:chitinase;shrimp and crab shell;N-acetylglucosamine;mechanoenzymology;heterologous expression
研究领域:
生物化学
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生物技术
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Waste Disposal & Sustainable Energy
·
2024
·Vol. 6
·期 2
·173-183
·
IF 3.6
Li Yiming,Yu Zhihao,Guo Mengyan,Zhang Ming,Xiong Jian,Qiao Yina,Zhang Rui,Lu Xuebin
Biomass-based carbon materials with hierarchical porous structures have attracted attention for their ability to provide more channels and shorten ion transport paths. Here, we developed a simple method based on confined nanospace deposition. During high-temperature treatment, the mesoporous silica layer wrapped around the outside of the crab shells acted as a closed nanospace and effectively suppressed the severe deformation of the crab shell structure by shrinking inward. The prepared carbon material has a layered porous structure with abundant and stable N and O co-doping (N 7.32%, O 3.69%). The specific capacitance of the three-electrode system was 134.3 F/g at a current density of 0.5 A/g in a 6 mol/L KOH electrolyte, and the assembled aqueous symmetric supercapacitors exhibited an excellent cycling stability of 98.81% even after 5000 cycles. Graphical abstract
研究领域:
材料科学
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能源存储
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生物质利用
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
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2025
·
IF 12.5
Zhicheng Cai,Jianfeng Lu,Ziqi Dong,Hong Wang,Qiang Li,Lin Lin,Chenghui Wang,Bin Zheng,Xiangzhao Mao,Changhu Xue
Chitin, a high-value biopolymer derived from crustacean shells, generally requires harsh chemical decolorization to achieve acceptable purity and appearance. Herein, we developed a green extraction method for chitin using atmospheric pressure plasma jet pretreatment combined with acid–base processing. Chinese mitten crab shells were subjected to different sequences and concentrations of hydrochloric acid (HCl) and sodium hydroxide (NaOH) treatments, with and without plasma pretreatment. Structural and physicochemical characterizations were performed via FTIR, SEM–EDS, AFM, XPS, NMR, XRD, TGA, and molecular weight analysis. The results indicated that when the acid–base concentrations were ≥2-M HCl and ≥1-M NaOH, plasma pretreatment (PJ–HN) enabled the release of high-purity chitin without the need for chemical decolorization. The chitin obtained exhibited comparable crystallinity (64.58 %), thermal stability (DTG max = 402.9 °C), and molecular weight (6.89 × 10 5 g/mol) to commercial chitin. Moreover, the PJ–HN samples retained high acetylation degrees and showed enhanced surface roughness, indicating improved functional potential. The antibacterial test confirmed that it possesses broad-spectrum antibacterial activity. The present study demonstrates that plasma-assisted extraction can serve as an eco-friendly and efficient alternative to conventional chemical methods in crustacean chitin processing.
研究领域:
生物高分子
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绿色化学
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材料科学
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生物技术
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Food Biophysics
·
2022
·Vol. 17
·期 4
·484-494
·
IF 3.34
Liu Jinming,Xu Jianhang,Chen Qian,Ren Jing,Wang Hui,Kong Baohua
Abstract PVA is a kind of biodegradable polymer that can be used as carbon source and energy by bacteria. In this study, deacetylated crab-shell particles (dCSPs) which exhibit strong biological activity due to the composition of chitin and CaCO 3 , as natural and environmentally friendly multi-macromolecule fillers, were used to modify poly(vinyl alcohol) (PVA) resin to form PVA/dCSP biocomposites. The Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD) results proved that the –OH in PVA and the C=O groups of CO 3 2- in the dCSPs could form hydrogen bondings, which might retard the crystallisation of PVA. With the increased of dCSPs content, those biocomposites showed improved surface hydrophobicity, water vapor barrier, thermomechanical properties, thermostability, fire resistance, and antibacterial activity. Especially, PVA/dCSP biocomposite film with 30% dCSPs showed excellerent properties above with not much sacrifice of tensile strength and elongation at break. The incorporation of dCSPs effectively enhanced the bacteriostasis ability against both Escherichia coli and Staphylococcus aureus . The introduction of dCSPs in PVA ensures effective utilisation of agricultural by-products. In general, this study provides an alternative method for the development of biodegradable antibacterial materials, which could be used in food packaging applications. Graphical Abstract
研究领域:
材料科学
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生物学
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食品科学
✓ 已验证
产品关联
DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2022
·
IF 6.056
Hui Wang,Jinming Liu,Xu Fan,Jing Ren,Qian Liu,Baohua Kong
In this study, natural crab-shell particles (CSP) and deacetylated crab-shell particles (dCSP) were used as crosslinking agents at the present of glucolactone to obtain high strength mono-crosslinked and bi-crosslinked sodium alginate (NaAlg) hydrogel films, respectively. The results indicated that the CSP in the system could occur Ca 2+ crosslinking, and the addition of dCSP could help to form both Ca 2+ crosslinking and polyelectrolytes interactions with NaAlg. The remaining unreacted CaCO 3 could enhance the thermal stability of the films due to the high thermally stable CaCO 3 . The surface hydrophobicity, gel properties, mechanical strength and thermal stabilities of those bi-crosslinked NaAlg hydrogel films were better than those of neat NaAlg film and mono-crosslinked NaAlg hydrogel films, which overcome the inferior thermo-mechanical properties for traditional hydrogel films. In addition, the releasing time of those prepared hydrogel films for diclofenac sodium was higher than 36 h, which illustrated sustained drug releasing activity. The CSP modified NaAlg hydrogel film with 0.5% GDL content exhibited the highest cumulative release amount. The proposed approach is a promising green crosslinking technique to develop high performance NaAlg hydrogel films that can realize active ingredients and drugs sustained release in food packaging and medical wound dressing areas.
研究领域:
材料科学
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药学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）