Journal of Materials Chemistry A
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2024
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IF 10.7
Xiaosai Hu,Haoran Cao,Man He,Junrui Miao,Yanyan Jin,Hongming Lv
Polyethyleneimine (PEI), with an abundance of amino groups, demonstrates a strong affinity for heavy metal ions, thus emerging as a promising candidate for applications in wastewater treatment. However, the inherent water solubility of PEI limits its direct use for the remediation of heavy metals. Contrary to the previous synthetic approaches that employed PEI solely as a surface modifier, the present work utilizes the PEI polymer as the fundamental matrix for the development of water-insoluble polyethyleneimine derivative adsorbents (PAPEI). This innovative method eliminates the need for additional solid substances, enabling the effective elimination of Hg(II) from aqueous solutions. PAPEI adsorbents achieved a high adsorption capacity of 1832 mg g−1 for Hg(II) with a good selectivity (distribution coefficient Kd = 3.2 × 104 mL g−1). The adsorption process between the PAPEI adsorbents and Hg(II) was primarily attributed to chelation affinity. This work proposed a straightforward approach for designing PAPEI adsorbents that can efficiently remove Hg(II) from aqueous environments.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
MACROMOLECULAR RESEARCH
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2013
·Vol. 21
·期 7
·726-731
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IF 1.639
Huang Hui,Fan Yifan,Wang Junwei,Gao Haoqi,Tao Shiying
A water-insoluble β -cyclodextrin ( β -CD) polymer was synthesized by reacting β -CD with hexamethylene diisocyanate, and its adsorption kinetics and thermodynamics for phenol from aqueous solution was investigated. The kinetics of adsorption followed the pseudo-second-order model and the adsorption isotherms could be well fitted by the Freundlich adsorption equation. The values of thermodynamic parameters demonstrated that the adsorption was a physisorption in a spontaneous and exothermic process.
研究领域:
环境科学
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化学工程
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DOI
高影响因子
MATERIALS LETTERS
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2017
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IF 2.572
Rui Wang,Dandan Pu,Yubing Dong,Yehua Sun,Yaqin Fu,Qing-Qing Ni
Silk fibroin (SF) powder was prepared by a nontoxic low-sodium system to avoid introducing massive unwanted chemicals during the SF hydrolysis process. In this study, water-soluble and water-insoluble SF powder, were obtained through lyophilised SF solution by boiling degummed silk fiber in low-concentration Na 2 CO 3 solution with a certain degree of pressure. Compared with traditional SF hydrolysis systems, this study provides a simple and potentially time-saving approach to produce SF powder at a low cost.
研究领域:
生物材料学
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纺织科学
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化学工程
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DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2012
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IF 2.487
Xinlai Wei,Qiang Lu,Xianwei Sui,Zhi Wang,Ying Zhang
Water-insoluble pyrolytic cellulose with similar appearance to pyrolytic lignin was found in cellulose fast pyrolysis oil. The influence of pyrolysis temperature on pyrolytic cellulose was studied in a temperature range of 300–600 °C. The yield of the pyrolytic cellulose increased with temperature rising. The pyrolytic cellulose was characterized by various methods. The molecular weight distribution of pyrolytic cellulose was analyzed by gel permeation chromatography (GPC). Four molecular weight ranges were observed, and the M w of the pyrolytic cellulose varied from 3.4 × 10 3 to 1.93 × 10 5 g/mol. According to the elemental analysis (EA), the pyrolytic cellulose possessed higher carbon content and lower oxygen content than cellulose. Thermogravimetric analysis (TGA) indicated that the pyrolytic cellulose underwent thermo-degradation at 127–800 °C and three mass loss peaks were observed. Detected by the pyrolysis gas chromatography–mass spectrometry (Py-GC/MS), the main pyrolysis products of the pyrolytic cellulose included saccharides, ketones, acids, furans and others. Fourier transforms infrared spectroscopy (FTIR) also demonstrated that the pyrolytic cellulose had peaks assigned to C O stretching and glycosidic bond, which agreed well with the Py-GC/MS results. The pyrolytic cellulose could be a mixture of saccharides, ketones, and their derivatives.
研究领域:
生物质能
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材料化学
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DOI
高影响因子
Plasmonics
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2020
·Vol. 16
·期 2
·349-358
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IF 2.335
Teng Yuanjie,Wang Zhenni,Ren Zeyu,Qin Yanping,Pan Zaifa,Shao Kang,She Yuanbin,Huang Weihao
Water-insoluble molecules usually show poor surface-enhanced Raman scattering (SERS) signals, because they are hardly adsorbed on the surface of most commonly used SERS substrates, such as aqueous Ag or Au colloids. In this work, a highly sensitive and reproducible Ag monolayer film (Ag MLF) SERS substrate prepared by self-assembly of Ag nanoparticles (Ag NPs) on water/oil interface can realize the trace SERS detection of water-insoluble enrofloxacin. The positively charged phase transfer catalyst can transfer the negatively charged Ag nanoparticles in aqueous solution to the water/oil interface. At the same time, the water-insoluble enrofloxacin can also be attracted to the interface because of its lipophilic group. The type/volume of the oil phase and phase transfer catalyst and the vortex mixing time were all optimized to maximize the SERS effect of Ag MLF. Results showed that trace water-insoluble enrofloxacin can be identified by Ag MLF and its detection sensitivity was significantly improved. The proposed novel Ag MLF can be further applied to detect other water-insoluble molecules in SERS.
研究领域:
分析化学
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纳米材料科学
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DOI
高影响因子
MATERIALS & DESIGN
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2021
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IF 7.991
Cong Liu,Zhongbin Xu,Junfeng Liu,Xing Huang,Yan Shan
Encapsulating powder ingredients into hydrogel with programmable release ability is highly demanded in many fields including food engineering, medical and healthcare fields. However, directly adding water-insoluble powders into pre-gel solution makes the mixture susceptible to clogging problems during processing, thus limiting the loading rate. To address this problem, a new way to encapsulate water-insoluble powder ingredients without addition of any organic solvent named bubble-assisted encapsulation method is developed in this study. The powders were firstly encapsulated in hydrogel bubbles and further dispersed by T-shaped microfluidic flow to form the core/shell-structured powder in hydrogel microcapsules (P/H microcapsules). The obtained P/H microcapsules had an exceptionally high loading rate of water-insoluble powders up to 94.76%. The P/H microcapsules were freeze-dried for long-term storage, and meanwhile, the as-prepared microcapsules were able to swell rapidly to soft state before use. Moreover, with the well-defined core–shell structure, the P/H microcapsules were endowed with dual release capabilities to external stimuli. The bubble-assisted encapsulation method that enables direct dense encapsulation of powder ingredients at a high loading rate appears promising for water-insoluble food or pharmaceutical ingredients delivery.
研究领域:
食品工程
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医药领域
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生物材料
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
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2019
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IF 5.399
Kanghui He,Qi Li,Yan Li,Bin Li,Shilin Liu
In this work, water-insoluble bamboo shoot dietary fiber (BSDF) was prepared, and used as plant food particle stabilizer for oil-in-water (O/W) Pickering emulsions. The obtained plant food particle had novel emulsification ability, the prepared emulsions were stable against coalescence for at least 4 weeks and also insensitive to pH, ionic strength and pasteurization conditions. The BSDF suspensions and BSDF-stabilized O/W emulsions both exhibited shear-thinning behaviors; moreover, both viscosity and module were increased with the increase of BSDF contents. The surface coverage of emulsions was positively correlated with the content of BSDF suspensions. It indicated that the dietary fibers from bamboo shoot had a soft nature and suitable shape to produce stable Pickering emulsions, which could be used as food-grade particles for applications of food and cosmetics industries.
研究领域:
食品科学
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材料科学
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化学工程
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DOI
PubMed
高影响因子
FOOD HYDROCOLLOIDS
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2019
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IF 5.839
Kanghui He,Xingzhong Zhang,Yan Li,Bin Li,Shilin Liu
In this work, the physicochemical properties and emulsification performance of water-insoluble dietary-fibers (IDF) from Flammulina velutiper treated with high pressure homogenization were investigated. The homogenization resulted in the breakdown of fibers in the water-insoluble dietary-fibers, and subsequently water-insoluble dietary-fibers with the average width of about 24 nm and height of 4 nm was obtained. The obtained water-insoluble dietary-fibers not only had increased water holding capacity and stability when compared with that of the untreated sample, but also had improved interfacial properties. The water-insoluble dietary-fibers could be irreversibly adsorbed at oil-water interface, exhibiting an outstanding emulsification performance. The temperature, pH and ionic strength had little influence on the stability of the stabilized emulsions. The results would be of importance for the development of a kind of food-grade nanoparticles to perform as outstanding Pickering stabilizers for emulsions, which had great application prospects in food , cosmetics and pharmaceutical fields.
研究领域:
食品科学
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材料科学
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化学工程
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药学
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DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2012
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IF 2.823
Jian-Dong Cui,Ji Qing Qiu
Curdlan is a microbial polysaccharide composed exclusively of β-(1,3)-linked glucose residues. Until now only bacteria belonging to the Alcaligenes and Agrobacterium species have been reported to produce Curdlan. In this study, a bacterium capable of producing extracellular Curdlan, identified as Pseudomonas sp. on the basis of 16S rDNA gene sequencing, was isolated from soil samples. From the HPLC, permethylation linkage analysis, 13C NMR, and FT-IR analytical data, the polysaccharide consisted exclusively of glucose; the most prominent sugar was 1,3-linked glucose, and most glycosidic bonds joining these sugar residues were of the β-type. This also supported that the exopolysaccharide produced by Pseudomonas sp. was actually Curdlan. In addition, the Pseudomonas sp. was studied for the production of Curdlan by conventional “one-factor-at-a-time technique” and response surface methodology (RSM). It was observed that glucose and yeast extract were the most suitable carbon source and nitrogen source for Curdlan production, respectively. By using RSM, Curdlan production was increased significantly by 188%, from 1.25 to 2.35 g/L, when the strain was cultivated in the optimal condition developed by RSM, and the highest Curdlan production rate of 0.81 g/(L h) was obtained. To the best of the authors' knowledge, this is the first report on Curdlan production by Pseudomonas sp.
研究领域:
微生物学
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生物技术
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化学工程
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产品关联
DOI
PubMed
高影响因子
FOOD HYDROCOLLOIDS
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2022
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IF 11.504
Yuanyuan Liu,Yifan Zhang,Meiyang Zhen,Yuangen Wu,Meihu Ma,Yuxin Cheng,Yongguo Jin
The catechin and tannins as crosslinking and antioxidant compounds were added into sodium alginate/gelatin/poly(vinyl alcohol) (SA/GEL/PVA) blend film with 0.5%, 2%, and 5% (based on the total mass of polymers), respectively. This study aims to investigate the effect of different polyphenols on the structural and functional properties of food packaging film. Molecular interactions among polyphenols and polymers in film-forming solution (FFS) were analyzed based on the rheological behavior, low field nuclear magnetic resonance (LF-NMR), and the changes in structural characteristic of modified films were analyzed through Fourier transform infrared spectra (FTIR), Scanning electron mcroscopy (SEM) and X-ray diffraction (XRD) analysis. The results indicated that the crosslinking degree of the polymer network in FFSs modified by tannins was higher than that of catechin. The mechanical properties, water insolubility, water vapor barrier performance and antioxidant activity of the blend film were improved by polyphenols addition. The film modified by 2% tannins showed the highest tensile strength and elongation at break in comparing with catechin modified films. This study demonstrated that the tannins have a great potentiality in enhancing the structure and function of SA/GEL/PVA blend film.
研究领域:
材料科学
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食品科学
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高分子化学
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生物技术
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）