CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
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2020
·
IF 0.936
Jian-Li HAN,Qing-Hui CHEN,Mei-Yi ZOU,Yu LU,Ming WEI,Cheng LI,Cheng-Jian WANG,Lin-Juan HUANG,Zhong-Fu WANG
The peptide portion of the sialylglycopeptide (SGP) in egg yolk is composed of six amino acids (KVANKT), among which asparagine (N) is modified by a complex sialylated N -glycan. Sialylglycopeptides are mainly obtained from egg yolk through a cumbersome, expensive, and poorly scalable process. In this study, a simple and low-cost method for the separation and purification of sialylglycopeptide from egg yolk was developed based on hydrophilic interaction chromatography with medical absorbent cotton as stationary phase. Fifty egg yolks were treated with phenol to obtain the crude sialylglycopeptide. The latter was then formulated into a 150 mg/mL solution and loaded on a cotton hydrophilic chromatographic column, followed by treatment with 100%, 95%, 85% and 75% acetonitrile (ACN) aqueous solution to remove impurities. Finally, deionized water was applied for the final elution step. By this way, 300 mg of sialylglycopeptide was yielded and its purity was determined by high-performance liquid chromatography to be 95%. The glycan composition and glycosylation site of the sialylglycopeptide were validated by electrospray ionization mass spectrometry and tandem mass spectrometry.
研究领域:
生物化学
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食品科学
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分析化学
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产品关联
DOI
高影响因子
FIBERS AND POLYMERS
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2014
·Vol. 15
·期 8
·1609-1615
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IF 1.113
Yu Yuanyuan,Yuan Jiugang,Wang Qiang,Fan Xuerong,Wang Ping,Cui Li
Our previous studies have demonstrated that cotton fabrics treated with soluble immobilized-cellulase showed considerably lower degradation and higher retention of tensile strength than those treated with free cellulase. It is important to investigate the surface morphology and structure of cotton fibres for understanding the enzymatic degradation. In this study, the effects of the soluble immobilized-cellulase on the surface morphology and structure of cotton fibres were investigated. The ultrastructural changes in the fibre surfaces were inspected using Tapping-Mode Atomic Force Microscopy (TM-AFM) and scanning electron microscopy (SEM), and the results showed that the smooth surfaces could be obtained after the immobilized-cellulase treatment, and no obvious damage was observed on the fibre surfaces. The hydrogen bonds in the certain depth area beneath the fibre surface were investigated using Attenuated Total Reflectance Fourier-Transform Infrared Spectroscopy (ATR-FTIR) after the cellulase treatments. Furthermore, the result of fibre accessibility indicated that the hydrolysis occurring in the interior of the cotton fibres was limited during the immobilized-cellulase treatment. Crystalline index (CI) of the cotton fibres treated with free cellulase was slightly higher than that of fibres treated with immobilized cellulase.
研究领域:
材料科学
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生物化学
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产品关联
DOI
高影响因子
FIBERS AND POLYMERS
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2018
·Vol. 19
·期 9
·1850-1860
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IF 1.353
Bismark Sarkodie,Zhu Zhifeng
The objectives of this work were to survey the effect of amphipathic modification of starch on the adhesion to cotton fibers for improving the adhesion of starch to cotton in warp sizing. The amphipathic starch (AS) with oleophilic octenylsuccinate and hydrophilic phosphate substituents was prepared by the phosphorylation with sodium tripolyphosphate (STP) followed by the octenylsuccinylation with 2-octenylsuccinic anhydride (OSA). Two series of AS samples with differential total degrees of substitution ( DS t ) and substituent ratios of phosphates to octenylsuccinates were evaluated by fourier transform infrared (FTIR) analysis, degree of substitution, adhesion to cotton and surface tension. The adhesion of the starch to fibers was investigated using a legal method (FZ/T 15001-2008). The FTIR spectra revealed that octenylsuccinates and phosphates have been attached to the backbones of the starch. The amphipathic modification of starch with STP and OSA was an effective method to enhance the adhesion of corn starch to cotton. The strong adhesion of the AS to cotton was attributed to the reduced surface tension arisen from oleophilic octenylsuccinate and hydrophilic phosphate substituents and increased steric hindrance of the substituents introduced onto starch. The investigation showed that the improvement in the adhesion of the starch after amphipathic modification could be buttressed by the tensile strength of cotton yarns sized with AS. It was found that the AS was desizable and showed satisfactory desizing efficiency in oxidant desizing. Based on the adhesion, reaction efficiencies, and desizability, the AS with a total DS t of 0.033 and a substituent ratio of DS p 0.014/ DS o 0.032 showed potential for use in warp sizing.
研究领域:
材料科学
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纺织工程
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高分子化学
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DOI
高影响因子
Coatings
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2022
·Vol. 12
·期 2
·138
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IF 3.236
Xueyao Wang,Qiang Li,Dongmei Yang,Xianhui An,Xueren Qian
In recent years, the elimination of heavy metals from wastewater has become an important topic due to rapid industrialization, and it is of considerable interest to develop renewable and degradable materials for this purpose. In this work, a novel Prussian blue/polyaniline@cotton fibers (PB/PANI@CFs) composite was fabricated by a two-step process. Phytic acid doped PANI as a binding coating greatly promoted both the growth of PB and the adsorption of Cu2+. The deposition ratio of PB was as high as 24.68%. Scanning electron microscopy (SEM) displayed that PB nanoparticles were grown more uniformly in the composite and formed a perfect nanocube structure compared with PB@CFs. The successful deposition of both PB and PANI on CFs was demonstrated by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FITR), and X-ray photoelectron spectroscopy (XPS). The effect of adsorption time, adsorbent dose, initial pH value, and initial copper sulphate concentration on the adsorption of PB/PANI@CFs composite for Cu2+was studied by static adsorption and was compared with those of PANI@CFs and PB@CFs. The results showed that the maximum removal efficiency of Cu2+by PB/PANI@CFs can reach 93.4% within 5 h, and the maximum adsorption capacity of Cu2+can reach 31.93 mg·g−1. The adsorption of Cu2+on PB/PANI@CFs followed the pseudo-second order kinetic model and conformed to the Freundlich adsorption isothermal model. The PB-functionalized CFs provided new insights into the design of efficient and low-cost absorbents for heavy metal remediation. The proposed process solves two problems simultaneously, i.e., the utilization of environmentally friendly and biodegradable biomass resources and the adsorption of heavy metal ions, and is a good approach to achieve high-quality and sustainable development.Keywords:cotton fibers;Prussian blue;polyaniline;phytic acid;binding coating;copper ion adsorption
研究领域:
环境科学
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材料科学
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废水处理
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DOI
高影响因子
FOOD CHEMISTRY
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2023
·
IF 8.8
Di Chen,Xinmiao Bu,Xinli Xu,Bin Wang,Manyu Zhang,Yumei Gan,Hang Yuan,Xu Xia
This study presents an in-pipette-tip kapok fiber-supported liquid extraction/ in-situ derivatization (in-pipette-tip KF-SLE-ISD) method for simultaneous enrichment and derivatization of furfurals . Briefly, 3 mg of natural kapok fiber, which was loaded in an assembled pipette-tip, was used to support 12.5 μL of extractant (ethyl acetate/toluene, 75:25, v/v) containing 10 mM 2,4-dinitrophenylhydrazine. The in-pipette-tip KF-SLE-ISD procedure was conveniently conducted by aspirating/releasing 1 mL of sample solution 10 cycles, allowing simultaneous extraction and derivatization of furfurals. Then, 100 μL of acetonitrile was aspirated/released 5 cycles for elution, 10 μL of which was directly analyzed by high-performance liquid chromatography. The limits of quantitation were in ranges of 0.10–0.45 μg/mL. The method showed satisfied linearity (R 2 > 0.99), precision (RSD < 8.53%) and relative recovery (90.34–114.71%), which was successfully applied to determine furfurals in various samples (e.g., honeys, juices and glucose injections). The proposed method has the merits of effectiveness, simplicity, low cost, wide availability and ease of automation.
研究领域:
分析化学
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食品科学
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产品关联
DOI
PubMed
高影响因子
CARBON
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2023
·
IF 10.9
Jiali Chen,Lei Wang,Bin Shen,Wenge Zheng
Recently, highly efficient electromagnetic attenuation materials are crucial for the development of modern electronics and telecommunications. Meanwhile, biomass-derived carbon materials have attracted widespread attention due to their availability and renewable characteristics. In this study, a composite with Co/C particles embedded in carbon networks was synthesized by pyrolysis of cotton fiber coated with ZIF-67, which are showing tunable and higher electromagnetic interference (EMI) shielding effectiveness (SE) than pure carbon networks. The remarkable performance originated from the aligned carbon networks and the Co/C particles connected by the carbon networks. The former can achieve the regulation of EMI SE by changing the angle between the fiber orientation direction and the direction of the incident EM-wave electric field, while the latter can play a role in catalytic graphitization and enhance the shielding performance. When decreasing the pyrolysis temperature and filling the composite powder with 30 wt% in the paraffin matrix, the minimum reflection loss (RL min ) can reach −58.8 dB at 5.12 mm. In addition, the effective absorption band (EAB) of the composite can cover the C-Ku band by adjusting the thickness from 3 to 7 mm. This work provides a potential guideline for efficient biomass-based electromagnetic attenuation materials.
研究领域:
材料科学
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电磁学
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DOI
高影响因子
CELLULOSE
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2022
·Vol. 29
·期 3
·2063-2076
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IF 6.123
Li Na,Chen Panpan,Liu Dongni,Kang Gaowei,Liu Liu,Xu Liyun,Yu Jianyong,Li Faxue,Wu Dequn
Cotton fabric has a wide application due to its hygroscopicity, air permeability, and large production of cotton fiber used to make the fabric. However, cotton materials are a safety hazard during its application because of flammability (limiting oxygen index is about 18%). In order to improve the flame retardancy of cotton fibers and reduce the damage of its mechanical properties, novel P/Si based flame retardant (PFR) nanoparticles were synthesized by one-step radical polymerization. Vinyl phosphoric acid and tetramethyl divinyl disiloxane were introduced into the nanoparticles. The structure, morphology and thermal stability of PFR was characterized by fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FE-SEM), thermogravimetric analysis test (TGA). Durable flame retardant cotton fibers were prepared by dip-coating and plasma induced crosslinking methods. Micro-calorimeter (MCC) characterization showed that the peak of heat release rate (pHRR) and the total heat release (THR) were reduced by 47.3% and 29.8% for modified cotton fibers compared with pure cotton fibers. Limiting oxygen index (LOI) of modified cotton fibers was increased to 27%. The residue carbon of modified cotton fibers was 19.0% at 700 °C, while the value of pure cotton fibers was 3.0%. Besides, durability of the modified cotton fibers was approved by cyclic washing test. In addition, flame retardant mechanism was revealed by collecting and analyzing condensed and gaseous pyrolysis products. The data of FE-SEM for residue carbon, FT-IR spectra of products at different pyrolysis temperatures and pyrolysis gas chromatography mass spectrometry (Py-GC–MS) showed that PFR was a synergistic flame retardant contained barrier and quenching effecting applied on cotton materials. Graphical abstract Novel phosphorus-silicon based nanoparticles were synthesized by one-step radical polymerization and applied to improve the flame retardant of cotton materials by dip-coating and plasma induced crosslinking.
研究领域:
材料科学
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纺织工程
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DOI
高影响因子
FIBERS AND POLYMERS
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2024
·Vol. 25
·期 11
·4271-4281
·
IF 2.2
Hou Mohan,Wang Lifang,Xu Qiuyu,Zhang Xuepeng,Yang Xue,Zhang Lei,Bai Yun,Li Yanyun,Liu Lifang
Waste cotton fibers are an ideal raw material for extracting nanocellulose crystals (CNCs), benefitting from their high cellulose content. In this study, the waste cotton fibers from the calendering finishing process were used to extract CNCs by sulfuric acid, TEMPO oxidation, and phosphoric acid methods, aiming to create a new way to reutilize the waste cotton fiber and also to verify the practicability that the phosphoric acid method can replace sulfuric acid and TEMPO oxidation methods. The CNCs obtained from the three methods are all in cellulose I state with an average length of 200-500nm and diameter of 15-20nm, indicating that the waste cotton fiber can extract CNCs. However, the CNCs from the phosphoric acid method showed the highest thermostability but the lowest crystallinity, while the ones from the sulfuric acid and TEMPO oxidation methods had higher crystallinity but lower thermal stability. Overall, the three methods are all acceptable for preparing CNCs, but the phosphoric acid method has more significant potential due to its low cost, environmental friendliness, and safety. Graphical abstract
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2024
·
IF 5.1
Chang Liu,Aijuan Zhang,Jie Liu,Yanchun Tong,Chunmiao Liu,Kaidi Mao,Haibin Sun,Qiangqiang Hu,Hongyu Gong,Yurun Feng,Xue Guo
Using vacuum impregnation method, the biomass carbon cotton fiber material was modified with polymer-derived SiCN ceramics and different Ni sources to successfully prepare the composite material. The electromagnetic microwave absorption properties of the material in the range of 2–18 GHz and the catalytic effect of different nickel sources were studied. The material modified by nickel nitrate hexahydrate forms a carbon fiber coated structure, improves impedance matching, enriches heterostructures , and increases electromagnetic synergistic loss, effectively enhancing the effective absorption bandwidth (EAB) reaches 4.72 GHz, the minimum reflection loss (RL min ) is −47.79 dB, and the thickness is only 1.32 mm. The results of CST show that the radar cross section of CFPN-2 material is −36.86 dB m 2 , and it has obvious effect of optimizing impedance matching.
研究领域:
材料科学
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电磁学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Hao Liang,Wei Tian,Nana Wang,Hongping Zhang,Ruijuan Wang,Ruibin Guo,Zunli Mo,Nijuan Liu
Uranium as a nuclear fuel, its source and aftertreatment has been a hot topic of debate for developers. In this paper, amidoxime and guanidino-modified cotton fibers (DC-AO-PHMG) were synthesized by the two-step functionalization approach, which exhibited remarkable antimicrobial and high uranium recovery property. Adsorption tests revealed that DC-AO-PHMG had excellent selectivity and anti-interference properties, the maximum adsorption capacity of 609.75 mg/g. More than 85 % adsorption capacity could still be kept after 10 adsorption-desorption cycles, and it conformed to the pseudo-second-order kinetic model and the Langmuir adsorption isotherm model as a spontaneous heat-absorbing chemical monolayer process. FT-IR, EDS and XPS analyses speculated that the amidoxime and amino synergistically increased the uranium uptake. The inhibitory activities of DC-AO-PHMG against three aquatic bacteria, BEY , BEL (from Yellow River water and lake bottom silt, respectively) and B. subtilis were significantly stronger, and the uranium adsorption was not impacted by the high bacteria content. Most importantly, DC-AO-PHMG removed up to 94 % of uranium in simulated seawater and extracted up to 4.65 mg/g of uranium from Salt Lake water, which demonstrated its great potential in the field of uranium resource recovery.
研究领域:
材料科学
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环境科学
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核能技术
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2024
·
IF 5.6
Gewen Su,Peiqing Jiang,Liyun Guo,Huawei Zhang,Xinyu Cheng,Huapeng Zhang
Bio-based aerogels are sustainable and eco-friendly materials that have gained increasing attention. However, their development is hindered by complex technological processes and unsatisfactory mechanical properties. To obtain a multi-scale hierarchical micro-meso porous composite aerogel with extraordinary thermal insulation and mechanical properties via simple and facile preparation process, we used oxidized cotton linter fiber (CF) as the skeleton and reinforcement, oxidized microcrystalline cellulose (MCC) as the supporting and filling matrix, and PVA as the crosslinking agent and a good glue to enhance the interaction between CF and MCC, and the porous network of the composite aerogel. The composite aerogel is very light, strong, and flexible. The best obtained composite aerogel has a apparent density of only 67.5% of the pure cotton fiber composite aerogel (CF 0 ), a maximum compressive stress of 1.22 MPa, which is 22 times higher than the pure microcrystalline composite aerogel (MCC 0 ), and a thermal conductivity of 0.0335 W/m.K, which is 89% lower than CF 0 . These properties make the composite aerogel suitable for various thermal insulation applications, such as protective clothing for extremely cold environment.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Food Chemistry-X
·
2024
·
IF 6.5
Xiangyu Li,Qian Qin,Yanbo Luo,Yongqiang Pang,Jinchao Wei,Xingyi Jiang,Di Chen
Furfural compounds, including 5-hydroxymethylfurfural, furfural, and 5-methylfurfural, are common in foods and pose health risks. This study presents a pipette-tip solid-phase extraction with in-situ derivatization (PT-KF-SPE/ISD) method for rapid analysis of furfural compounds in various food matrices. Utilizing natural kapok fiber as an efficient adsorbent, this method integrates extraction and derivatization into a single step via a simple pull-push operation. Derivatization with 2,4-dinitrophenylhydrazine increases the hydrophobicity and ultraviolet absorption of furfural compounds, enabling sensitive liquid chromatography-ultraviolet detection. The method shows good linearity, sensitivity, and reproducibility, with limits of detection in ranges of 3.9–6.0 ng/mL. Real sample analysis confirms its applicability in detecting furfural compounds in beverages and herbal products, offering a reliable and eco-friendly solution for food safety and quality control. Five greenness assessment metrics demonstrate the method's excellent environmental friendliness. This approach highlights the advantages of combining natural adsorbents with in-situ derivatization for efficient food analysis.
研究领域:
分析化学
·
食品科学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）