CARBOHYDRATE POLYMERS
·
2017
·
IF 4.811
Shunli Liu,Fang Yao,Olayinka Oderinde,Zhihong Zhang,Guodong Fu
Three-dimensional xanthan gum (XG)/graphene oxide (GO) hybrid aerogels were fabricated by ice crystal templating without using chemical modifiers. The hybrid aerogels were prepared by the stirring of xanthan gum-graphene oxide hybrid solution, followed by freezing at low temperature and finally by freeze-drying. The whole preparation could be completed within 12 h without producing any contamination and thus considered a fast, simple, economical, and green method for aerogel fabrication. XG/GO hybrid aerogels possessed different hierarchical pore structures because of various freezing temperatures. A network composed of co-aligned pore channels was obtained at a freezing temperature of −40 °C. The as-prepared hybrid aerogels exhibited stability and excellent adsorption capacity for organic dyes and heavy metal ions. Therefore, these aerogels could be used as efficient adsorbents in water purification. This study provided a basis for the cost-effective and large-scale commercial production of high-performance graphene oxide-based aerogels for water purification.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Polymers
·
2022
·Vol. 14
·期 13
·2599
·
IF 4.967
Kaili Liao,Junnan An,Lipei Fu,Houye Zhang,Meng Wei,Jinmei Bai,Yanfeng He
Welan gum is one of the most promising polymers used in polymer flooding for enhancing oil recovery, due to its excellent temperature resistance and salt-tolerance performance. However, welan gum, as a polymer with higher molecular weight, can be adsorbed and detained in the pore throat of the reservoir, which is characterized by a smaller size. Montmorillonite, a kind of clay mineral with high content in reservoir rocks, has strong adsorption capacity. Therefore, the adsorption behavior of welan gum on montmorillonite, as well as its influencing factors, are studied in this paper. The results show that the adsorption capacity is 2.07 mg/g. The adsorption capacity decreased with the increase in temperature. Both acidic and alkaline conditions reduced the adsorption capacity. The existence of inorganic salt affected the adsorption capacity. In addition, the higher the cation value, the lower the adsorption capacity. The characterization tests showed that the adsorption of welan gum on montmorillonite was characterized by physical adsorption and surface adsorption, indicating that there were no changes in the internal structure of montmorillonite. This study provides feasible methods to reduce the amount of welan gum adsorbed on montmorillonite, which is of great significance for reducing the permeability damage caused by welan gum adsorption and promoting the application of welan gum in polymer flooding for enhancing oil recovery.Keywords:welan gum;polymer flooding;enhancing oil recovery;montmorillonite;adsorption
研究领域:
石油工程
·
应用化学
✓ 已验证
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Lida Wu,Yitong Jiang,Chong Chen,Weibo Zhang,Jiayue Guo,Siyuan Liu,Pengjie Wang,Fazheng Ren,Baocai Xu,Yao Hu
The inherent propensity for aggregation necessitates the use of high concentrations of protein-polysaccharide nanoparticles to achieve stable Pickering emulsions. This study employed xanthan gum (XG) to mitigate the pronounced aggregation of zein nanoparticles by structure construction, thereby enhancing the emulsifying efficiency of zein/XG (Z/XG) nanoparticles. The Z/XG nanoparticles displayed significantly enhanced dispersity, with the absolute ζ-potential increasing from 6.25 mV to approximately 55 mV as the zein/XG ratio was optimized from 1:0 to 1:0.2. The Z/XG nanoparticles exhibited core–shell structure with zein as the core and XG as the shell, facilitated by electrostatic interactions. This structural transformation enables Z/XG nanoparticles to more readily adsorb at the oil-water interface. The addition of excess XG can further augment the stability of Z/XG emulsions due to the formation of XG networks in the continuous phase preventing the coalescence of oil droplets. It was demonstrated that a low concentration of 0.4 % Z/XG nanoparticles is sufficient to maintain emulsion stability under typical conditions of heating, pH, and ionic treatments. Overall, this study has developed a highly effective strategy to overcome the application challenges associated with protein-polysaccharide Pickering emulsions, broadening their potential applications in the food, cosmetic, and pharmaceutical industries.
研究领域:
食品科学
·
材料科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2024
·
IF 6.9
Pengkang Zhang,Tao Pan,Lijuan Ma,Bangguo Liu,Shuang Tian,Xiurong Chen
Foam stability plays an important role in the effect of blocking the odorous substances. Based on the characteristic of xanthan gum of enhancing foam stability and preventing foam from water drainage and coarsening, this paper investigated the half-life, foaming volume, viscosity, drainage curve, and bubble microstructure of foam filled with 0.1%, 0.2%, and 0.3% xanthan gum respectively, and further analyzed the correlation between xanthan gum dosage, viscosity of foam solution and foam stability. The effect of different stability foams on para-xylene was tested. The results showed that compared with no xanthan gum, the half-life of foam with 3% xanthan gum was extended from 1 to 61 h, the drainage time increased from 4.5 to 85 h, and the foaming coarsening rate slowed down 3 times. The addition of 0.3% xanthan gum reduced the peak value of the p-xylene dispersion by 83.7% and postponed the peak time by 6 times.
研究领域:
环境科学
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Gels
·
2024
·Vol. 10
·期 12
·840
·
IF 5
Xinxia Zhang,Yafeng Ding,Jiangtao Zhou,Qianqian Xu,Ting Li,Li Wang
The study aimed to prepare complex gels of sonicated quinoa protein (QP) and polysaccharides, comparing the effects of different protein components and pH on gel properties. FTIR analysis demonstrated that the β-structure in protein at pH 7.0 was enhanced by ultrasonic treatment, which could promote the formation of a gel network. Moreover, XG-AG (gel prepared by xanthan gum and albumin) and XG-GG (gel prepared by xanthan gum and globulin) exhibited higher levels of disulfide bonds and free sulfhydryl groups in the gel, requiring more energy to break the intermolecular sulfide bonds during heating. Under the same heating conditions, the rheological properties and gel strength of XG-UQPG (gel prepared by xanthan gum and ultrasonically treated QP) were superior to those of XG-UGG (gel prepared by xanthan gum and ultrasonically treated globulin) and XG-UAG (gel prepared by xanthan gum and ultrasonically treated albumin). Additionally, XG-UGG (pH 7.0) demonstrated the highest water holding capacity (WHC) and oil holding capacity (OHC). This was attributed to the disulfide bonds created in the proteins by the ultrasound treatment, encouraging them to interact to form more uniform holes in gel that can hold more water/oil molecules. Conversely, at pH 4.5, the WHCs of the gels were reduced due to the presence of rougher protein structures. These findings shed light on the impact of protein composition on gel properties and offer insights into enhancing the quality of quinoa protein gel.
研究领域:
食品科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Mengyuan Zeng,Bingqiao Yang,Zhiwen Guan,Longyan Zeng,Huihua Luo,Bing Deng
In this work, xanthan gum (XG) was exploited as a novel dolomite depressant in the flotation separation of apatite from dolomite in sodium oleate system. The flotation performances and adsorption mechanism of XG towards apatite and dolomite were studied through flotation tests, adsorption capacity measurements, micro-heat tests, atoms density calculations and surface characterizations. Flotation results revealed that XG exhibited strong depression effect on dolomite but barely influenced the flotation of apatite. The results of zeta potential, infrared spectroscopy analysis, adsorption capacity measurements and micro-heat tests proved that XG trended to adsorb on dolomite other than apatite, which hindered the adsorption of NaOL on dolomite and rendered the surface hydrophilic. Atom density calculations indicated that the preferential adsorption of XG on dolomite was due to much more dense and active Ca sites on dolomite surface than that of apatite. XPS results suggested that XG was strongly adsorbed on dolomite surface by means of chelation between COOH or OH groups within XG and Ca sites on dolomite, while it was weakly adsorbed on apatite by hydrogen bonding between OH groups within XG and F atoms on apatite surface.
研究领域:
矿物加工工程
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2017
·
IF 1.591
Hong Zhang,Yongjun Lu,Bo Fang,Xiaohui Qiu,Wen Zhai,Liwei Wang,Hao Jin,Kejing Li
The crosslinking process of xanthan gum was studied under static and shear conditions. Conventional rotational rheometer was adopted to study the shear crosslinking process, and the static crosslinking process was monitored using an optical microrheometer without physical contact between the instrument and the sample. Both experiment and numerical simulation were adopted to compare the two gelation processes at different temperatures. The results showed that the effects of temperature on static and shear crosslinking processes of xanthan gum have the same trend and the rheological curves of the two gelation processes are similar in shape. The same rheokinetics equations were established to describe the two gelation processes and the simulated values are in good agreement with the experimental data. The changes of the model parameters with respect to temperature are quite similar for both the gelation processes, which verifies the feasibility of the microrheology method for measuring the static crosslinking reaction.
研究领域:
生物化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Gels
·
2021
·Vol. 7
·期 4
·179
·
IF 4.702
Youjie Sheng,Canbin Yan,Yang Li,Yunchuan Peng,Li Ma,Qiuhong Wang
The foams stabilized by nanoparticles (NPs), water-soluble polymers, and surfactants have potential application prospects in the development of new, environmentally friendly firefighting foams. In the present study, a gel foam containing a water-soluble polymer (xanthan gum, XG), hydrophilic silica NPs, hydrocarbon surfactant (SDS), and fluorocarbon surfactant (FS-50) were prepared. The surface activity, conductivity, viscosity, and foaming ability of foam dispersions were characterized. The gel foam stability under a radiation heat source and temperature distribution in the vertical foam layer were evaluated systematically. The results show that the addition of NPs and XG has a significant effect on the foaming ability, viscosity and foam thermal stability, but has a very subtle effect on the conductivity and surface activity. The foaming ability of the FS-50/SDS solution was enhanced by the addition of NPs, but decreased with increasing the XG concentration. The thermal stability of the foams stabilized by SDS/FS-50/NPs/XG increased with the addition of NPs and increasing XG concentration. Foam drainage and coarsening were significantly decelerated by the addition of NPs and XG. The slower foam drainage and coarsening are the main reason for the intensified foam thermal stability. The results obtained from this study can provide guidance for developing new firefighting foams.Keywords:foam;thermal stability;xanthan gum;nanoparticle;surfactant
研究领域:
材料科学
·
消防工程
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
Food Bioscience
·
2025
·
IF 5.9
Chen Yang,Tianlai Guo,Zizhen Zhang,Aitong Li,Yaqian Han,Yening Qiao,Guoqiang Xia,Lina Wang,Jianming Wang
Oleogels have been extensively employed for the encapsulation and protection of lipophilic nutrient. This study was investigated the effect of low ionic strength (0-100 mM) on the delivery system properties of oleogels prepared by emulsion template method using Soy protein isolate - Xanthan gum nanoparticles (SXNPs) as stabilizers. With the increase of ionic strength (0-100 mM), the particle size of SXNPs showed a trend of decreasing and then increasing. At ionic strength of 50 mM, SXNPs had the best interfacial adsorption properties (82.71 ± 0.19%), which was attributed to the salt ions improved the surface hydrophobicity of SXNPs. Under this condition, the emulsion stabilized by SXNPs exhibited the smallest particle size (2.23 μm) and the best rheological properties. Microscopic images showed that the oleogel had the densest network structure at ionic strength of 50 mM , which enhanced the retention of β-carotene in storage environments at 4, 25 and 55 °C and oil binding capacity of oleogel (10.20%). In vitro digestion showed up to 55.17% free fatty acid release from the oleogels compared to bulk oil, highlighting their potential for controlled nutrient delivery.
研究领域:
食品科学
·
营养学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2021
·Vol. 29
·期 17
·25759-25773
·
IF 4.223
Xu Qi,Chen Jiajun,Wang Yiti,Ke Shengnan
Although it has been proven that the addition of shear-thinning polymers can lead to an improvement in the sweeping efficiency of the remedial agent in heterogeneous aquifers, the related mechanisms require further investigation. This study revealed the mechanisms associated with the improvement of fluid sweeping uniformity. Under the assumption of no transverse flow existed between layers, the variation patterns of the fluid sweeping uniformity in strip layered heterogeneous media ( R P / R K ) with the change of the fluid hydraulic conductivity were investigated. The outcomes showed that, for the hydraulic conductivity dominated fluid sweeping uniformity control, the performance was satisfactory only when the ratio of the hydraulic conductivities of viscous fluid in porous media (PM) layers ( K 1P / K 2P ) is less than 2.5 times that of pure oxidant solution ( K 1K / K 2K ), and PM combinations with higher permeability contrast usually present a wider applicability and better performance. In addition, transverse fluid movement was more likely to occur in layers with low permeability contrasts (2.3–5) than in those with relatively higher permeability contrasts (> 11). The observed transverse pressure difference directly confirmed the hypothesis of the dynamics of the cross-flow mechanism that existed during viscous fluid flow, and the relationships between the fluid fronts and the pressure head difference at each point (Px) were proposed. Our study exemplifies an effective strategy for determining the most economically effective co-injection concentration of xanthan to achieve highly efficient delivery of remedial agents.
研究领域:
环境科学
·
地下水修复
·
流体力学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 138
·期 48
·51601
·
IF 3.125
Qianru Xu,Yaqi Zhang,Ruquan Zhang,Yongzhen Tao
Polyelectrolyte hydrogels with spinnability and electroresponsive were prepared from xanthan gum (XG) and gelatin. Oscillatory rheological measurements were utilized to explore mechanical properties and thermal stability of the resultant XG-Gelatin5 hydrogels. The XG-Gelatin5 hydrogels possessed higher strength and larger critical strain than these of the XG hydrogels, demonstrating existence of synergistic interactions. The XG-Gelatin5 hydrogels were stable in temperature range of 20–60°C, and gradually release drug with controlled manner in neutral and acid medium at 37°C. The self-recoverable and thixotropic XG-Gelatin5 hydrogels were extruded to form hydrogel fibers, and the dried hydrogel fibers rapidly bend towards cathode under applied voltage. Long hydrogel fibers were harvested with enhancement by Fe 3+ ions, and were weaved and braided to obtain hydrogel fiber constructs. The XG-Gelatin5 hydrogel fibers with electroresponsive and controlled drug release possess potential applications in biomaterials, tissue engineering, and drug carrier fields.
研究领域:
生物材料
·
组织工程
·
药剂学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2020
·
IF 5.162
Ali Mohsin,Waqas Qamar Zaman,Meijin Guo,Waheed Ahmed,Imran Mahmood Khan,Sobia Niazi,Abdur Rehman,Haifeng Hang,Yingping Zhuang
In this study, we prepared a series of edible blend films of xanthan and curdlan by mixing different ratios of these two biopolymers . Characterization techniques like FTIR, XRD, TGA and SEM analysis were applied to investigate the newly formed films. Moreover, mechanical properties, moisture absorbance properties and water solubility of these films were also determined. The obtained results demonstrated that the strong intermolecular hydrogen bonding was observed between xanthan and curdlan at pH 5. At this pH, the xanthan-curdlan hydrogel retained the original structure of xanthan and sustained self-aggregation of xanthan chains via hydrogen bonding, which led to strong intermolecular bonding between xanthan and curdlan. Furthermore, the 5:5 and 4:6 ratios of xanthan and curdlan showed greater interaction in the blend films that resulted in their excellent miscibility. Moreover, highest tensile strength of 28.13 and 26.45 MPa were also found in the same rational of XG/CG blend films. In addition, it was observed that the curdlan incorporation improved the water solubility properties of XG/CG blend films. Conclusively, this xanthan/curdlan nexus with excellent mechanical and moisture barrier properties confirm its potential application and prospective use as food packaging material.
研究领域:
食品科学
·
材料科学
·
生物化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）