Journal of Cleaner Production
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2023
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IF 11.1
Hao Gu,Lijuan Ma,Tao Zhao,Tao Pan,Pengkang Zhang,Bangguo Liu,Xiurong Chen
Odorous contamination would occur in the polluted soils' remediation of the abandoned industry factory. To suppress odorous substances’ emissions, a novel foam was prepared with plant protein, xanthan gum , and alkyl glycosides . Since xanthan gum and alkyl glycosides have the characteristics of prolonged foam half-life and enhanced foaming ability, the optimal ratio of xanthan gum to alkyl glycosides is crucial during foam formulation determination. When xanthan gum concentration increased from 0.00% to 0.30%, the viscosity of the foaming solution increased from 12 to 223 mPa∙s, while the surface tension declined by 12.3%. As a result, the foam half-life increased from 0.3 to 56 h, and the foaming volume decreased by 25.5%. On contrary, with the addition of alkyl glycosides, the surface tension decreased significantly, and the foaming volume increased by 36.5% under the xanthan gum concentration of 0.30%. Therefore, the optimal content of xanthan was 0.30% in the presence of 100 mM alkyl glycoside. Then, this novel foam could prevent 67% of p-xylene from escaping within 24 h. In actual sites, novel foams showed a barrier rate of over 75% on different odorous substances most of the time.
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Science China-Materials
·
2023
·Vol. 66
·期 9
·3723-3734
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IF 8.1
Lu Qishu,Liu Wenxia,Liu Xiaona,Yu Dehai,Song Zhaoping,Wang Huili,Li Guodong,Ge Shaohua
Conductive hydrogels have attracted tremendous attention in fabricating flexible strain sensors as highly stretchable and biocompatible strain sensing materials. However, fabricating a multifunctional conductive hydrogel simultaneously with high toughness and high sensing performance for monitoring subtle strain is still a great challenge. Herein, we developed a new conductive hydrogel by using poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) and xanthan gum (XG) costabilized soft Ga droplets as conductive materials and using the in situ synthesized and chemically crosslinked polyacrylamide (PAM) as the hydrogel matrix. The PEDOT:PSS simultaneously constitutes a rigid conductive network with Ga droplets, and XG constitutes a rigid sacrificial network. The Ga droplets simultaneously promote the in situ free radical synthesis and crosslinking of PAM at room temperature. The as-prepared XG-PEDOT-Ga-PAM hydrogel shows high toughness, good moldability and adhesiveness. XG-PEDOT-Ga-PAM hydrogel-based strain sensor shows a very high sensitivity (gauge factor = 12.6 in the strain range of 175%–300%), short response/recovery time (250 ms), low detection limit (<0.1%) and excellent durability (>500 cycles). The excellent sensing performance of the hydrogel-based strain sensor enabled it to be highly competent in accurately monitoring various human activities from subtle radial pulses to large-scale human joint bending.
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CARBOHYDRATE POLYMERS
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2023
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IF 11.2
Yaqi Zhang,Ruquan Zhang,Yongzhen Tao
Herein, we explored strategies for defoaming and controllable adjustment of spinnable and mechanical properties of polyanion polysaccharide-based hydrogels to fabricate conductive, water-retaining, and knittable hydrogel fibers for next-generation flexible electronics. Xanthan gum (XG) and aniline tetramer modified-polysaccharide (TMAT38) were crosslinked with sodium trimetaphosphate (STMP) and subsequently by Fe 3+ /Fe 2+ ions coordination to prepare conductive and spinnable hydrogels. Polypropylene glycol was introduced as chemical antifoam, and solvent displacement method was adopted to improve mechanical and water-retaining properties. The glycerol-immersed XG5-TMAT38-STMP-Fe 3+ /CA-PPG hydrogel exhibited conductivity of 3.55×10 −3 –27.30×10 −3 S/cm, storage modulus at linear viscoelastic region of 573 Pa–1717 Pa and self-healing percentage of 100 %–108 %. The 2 h glycerol-immersed hydrogel fibers with good flexibility, moisture retention and freezing tolerance were ready to bend and knit into fabrics. The hydrogel fiber braid possessed better conductivity, reliability and durability than the single hydrogel fiber as strain sensors. The hydrogel fiber fabric perceived tiny vibration triggered by swallowing, speaking and writing with good sensitivity and reproducibility. Furthermore, a three-component model was developed to evaluate response sensitivity and recoverability of the hydrogel fiber fabric-based pressure sensors, which facilitated understanding transient response of polymer-based hydrogel strain and pressure sensors.
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ULTRASONICS SONOCHEMISTRY
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2023
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IF 8.4
Qiufang Liang,Chengwei Zhou,Abdur Rehman,Abdul Qayum,Yuxuan Liu,Xiaofeng Ren
Multi-frequency power ultrasound was applied as an environmentally friendly technique to control the nanoparticles (LS/XG-NPs) embedded with lotus root starch/xanthan gum, with the aim of enhancing the stability of Pickering emulsions. The present investigation was centered on evaluating the impact of ultrasound technology on various aspects of the emulsions, encompassing their mean particle size, particle size distribution, zeta potential, microstructure, rheological characteristics, and environmental stability. The findings of this study indicate that ultrasonic treatment enhanced the adsorption of LS/XG-NP onto oil droplets surface, resulting in a reduction in their size. Additionally, ultrasonic treatment decreased the viscosity and Brownian motion rate of the emulsion stabilized by LS/XG-NP, leading to increased fluidity. Furthermore, the emulsion's thermal stability and resistance to environmental oxidation were significantly enhanced through ultrasonic treatment. The Pickering emulsions that were prepared using ultrasound demonstrated excellent resistance to acid, alkali (pH 2–8) and salt ions (50–300 mM NaCl) for a period of 30 days during storage. It was worth anticipating that ultrasound-assisted LS/XG-NPs could efficiently retard the volatilization of fishy odor components within fish oil. Taken together, the present research has evinced the efficacy of ultrasound in enhancing the stability of Pickering emulsions coated with LS/XG-NPs. These findings offer significant novel insights into the advancement of ultrasound-assisted Pickering emulsions that are stabilized with starch-based or biopolymeric materials.
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BIORESOURCE TECHNOLOGY
·
2024
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IF 9.7
Siyu He,Jing Chen,Xuqian Wang,Xiaolin Wang,Panyu Li,Yongkui Zhang
The high efficiency, economy, sustainability and no secondary pollution of U(VI) removal is an important and challenging topic for U(VI) wastewater treatment. Here, the regenerable biohybrids with xanthan gum (XG) stabilized biogenic mackinawite nanoparticles (BX-FeS) were prepared, where XG acted as carrier facilitated the Fe 2+ attachment and induced the low size, high stability and activity of nearly spherical FeS nanoparticles. Results showed that BX-FeS kept high activity after storing two years and good performance for U(VI) removal in broad pH range and co-existence of ions, and had greater removal efficiency (97.9 %) than biogenic B-FeS (67.1 %). Moreover, BX-FeS preformed high adsorption capacity in uranium wastewater (658.0 mg/g), and lower cost compared with zerovalent-iron and silica gel. Importantly, BX-FeS maintained high activity within three regeneration cycles driven by Desulfovibrio desulfuricans , inhibited the secondary pollution (Fe 3+ , SO 4 2- ) of reaction. This study provides a new strategy for sustainable and efficient treatment of U(VI) wastewater.
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ENERGY
·
2025
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IF 9.4
Chuntian Li,Lian Li,Zhidong Wang,Qianyi Zhang,Hanwen Zhang,Zhiwen Wang,Ruiqi Shen,Luigi T. De Luca,Wei Zhang
To achieve accurate and adjustable propulsion power, it is essential to utilize propellant materials undergoing repeated ignition and combustion cycles. Injectable gel propellant materials possess superior mechanical properties and fluidity, allowing for the regulation of their combustion process through the precise control of flow rate. Herein, an injectable conductive ion gel which uses hydroxylamine nitrate ([NH 3 OH] + [NO 3 ] - , HAN) high-energy ion salt as matrix and lithium perchlorate ([Li] + [ClO 4 ] - , LP) and ammonium nitrate ([NH 4 ] + [NO 3 ] - , AN) ion salt to adjust its conductivity was reported. The components of this injectable conductive gel material exhibit high compatibility, as confirmed by XPS and FT-IR analysis, and the uniqueness of the conversion between liquid and solid has established a good supply property. After centrifugation at 5000 r·min −1 for 15 min, the eccentricity was only 0.6 %, demonstrating its excellent stability. Compared with the existing gel propellant materials, its ignition delay time in a single ignition test reached 700 ms under 225V and 8 ml min −1 . More importantly, the ignition delay can be reduced to around 200 ms after multiple repeated ignition tests, indicating an ultra-fast response phenomenon that rarely occurs in most of the research process, paving the way for realizing the ultrafast multiple repeated application of gel propellant materials in space propulsion.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yiyang Zhou,Hailang Liu,Xuan Zhou,Xiangyu Lin,Yinfeng Cai,Minggui Shen,Xujuan Huang,He Liu,Xu Xu
Hydrogel electrolyte is an ideal candidate material for flexible energy storage devices due to its excellent softness and conductivity properties. However, challenges such as the inherent mechanical weakness, the susceptibility to be frozen in low-temperature environments, and the insufficiency of hydrogel-electrode contact persist. Herein, a “Multi in One” strategy is employed to effectively conquer these difficulties by endowing hydrogels with high strength, freeze-resistance, and self-adhesive ability. Multiple hydrogen bond networks and ion crosslinking networks are constructed within the hydrogel electrolyte (PVA/PAAc/XG) containing polyvinyl alcohol (PVA), acrylic acid (AAc), and xanthan gum (XG), promoting the enhanced mechanical property, and the adhesion to electrode materials is also improved through abundant active groups. The introduction of zinc ions provides the material with superior frost resistance while also promoting electrical conductivity. Leveraging its multifunction of superior mechanical strength, anti-freeze property, and self-adhesive characteristic, the PVA/PAAc/XG hydrogel electrolyte is employed to fabricate zinc ion hybrid supercapacitors (ZHS). Remarkably, ZHS exhibits outstanding electrochemical performance and cycle stability. A remarkable capacity retention rate of 83.86 % after 10,000 charge-discharge cycles can be achieved at high current densities, even when the operational temperature decreases to −60 °C, showing great potential in the field of flexible energy storage devices.
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Arabian Journal of Chemistry
·
2022
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IF 6.212
Zhenzhong Zang,Shichun Zhao,Ming Yang,Chengqun Yu,Hui Ouyang,Lihua Chen,Weifeng Zhu,Zheng-gen Liao,Abid Naeem,Yongmei Guan
Honeysuckle is a commonly used Chinese medicine for treating intestinal inflammation and other diseases. Compounds that are absorbed into the blood produce pharmacodynamic effects. However, it is still unclear which compounds in honeysuckle are absorbed into the blood. Thus, the purpose of this study was to investigate the composition and in vivo absorption of active components in honeysuckle in male Sprague-Dawley rats, and develop a controlled release hydrogel system. UPLC-LTQ-Orbitrap-MS was used to determine the active ingredients of honeysuckle in vitro and in vivo . A total of 80, out of which 42 components were found to be absorbed into the blood, which includes flavonoids, iridoids, organic acids and other compounds. FTIR analysis confirmed crosslinking between hydrogel content and drug loading, and TGA and DSC analysis indicated a high thermal stability. XRD analysis showed a decrease in crystallinity following crosslinking, and SEM revealed an irregular and hard surface. The maximum swelling and drug release were observed at pH 7.4 as compared to pH 1.2. The identified blood components can be used to determine Q-markers, while the prepared hydrogels can serve as an effective and promising carrier for the controlled release of honeysuckle extracts.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Zenghong Xing,Hongtao Chen,Yuzhong Yan,Deming Gong,Guowen Zhang
In this study, the egg white protein (EWP)-tannic acid (TA)-xanthan gum (XG) ternary conjugate was used to construct emulsion and oleogel delivery systems to load curcumin. The effect of EWP-TA-XG conjugate concentration on the properties of emulsions and oleogels as well as the digestion characteristics of curcumin-loaded emulsion and oleogel were investigated. It was found that with the increase of EWP-TA-XG conjugate concentration, the D[4, 3] of emulsions decreased, while the absolute value of zeta potential and the stability of the emulsions increased. All emulsions showed good stability after centrifugation at different temperature, pH and ionic strength. Additionally, the emulsions at high concentrations of EWP-TA-XG conjugate (0.6–1.0 %, wt) had high viscosity and good gel property. As the concentration of EWP-TA-XG conjugate increased, the oil binding capacity of oleogels enhanced (90.38–99.87 %), and all oleogels showed solid behaviors (G′ > G″). The oleogels had a higher antioxidant activity than bulk oil, and their antioxidant capacity was positively correlated with the concentration of EWP-TA-XG conjugate. It was also found that the free fatty acid release rate and bioaccessibility of curcumin in the emulsion (66.63 % and 65.53 %) and oleogel (64.24 % and 62.20 %) systems were significantly improved compared to those in bulk oil (30.63 % and 29.75 %), indicating that the emulsion and oleogel delivery systems played a good protective role in the delivery of curcumin. This study may offer novel insights into the development of EWP-TA-XG conjugates-based emulsion and oleogel as delivery systems in encapsulating and delivering fat-soluble active substances.
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Science China-Technological Sciences
·
2025
·Vol. 68
·期 11
·1-10
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IF 4.9
Guo Jia,Xu Jiaqi,Zhang Xiangwei,Li Zhengmao,Liu Fuyang,He Lei,Long Mingce,Tong Meiping
The rapid aggregation and sedimentation, the high toxicity towards bacteria, and the passivation of surfaces hinder the application of zero-valent iron (ZVI) particles in groundwater remediation. To overcome the shortages, ZVI particles were modified using oxalic acid (an environmental-friendly low-molecular-weight organic acid) together with xanthan gum (a safe and cost-effective high-molecular-weight polymer). We found that ZVI modified with both oxalic acid and xanthan gum exhibited superior Cr(VI) removal performance than those modified solely with oxalic acid and unmodified ZVI. Due to the reduced Fe 2+ release, the toxicity towards Escherichia coli by oxalic acid-xanthan gum modified ZVI was greatly inhibited. Via enhancing electrostatic repulsion through increasing the negative zeta potentials, modification of ZVI by oxalic acid and xanthan gum improved the dispersion of ZVI and reduced their sedimentation in suspension. Moreover, the mobile performance of ZVI in porous media was greatly improved by the modification with oxalic acid and xanthan gum due to the enhanced electrostatic repulsive interaction between ZVI and quartz sand. The observations held true in actual groundwater samples without and with heavy metal contamination. Clearly, the modification of ZVI by using oxalic acid and xanthan gum could be a feasible approach to enhance the practical application potential for the in-situ decontamination of groundwater.
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Frontiers in Nutrition
·
2022
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IF 6.59
Li Gongwei,Zhao Yicong,Zhang Jie,Hao Jia,Xu Duoxia,Cao Yanping
Calcium carbonate (CaCO3) is difficult to deliver in food matrices due to its poor solubility. In this work, CaCO3 powders were encapsulated into Solid-in-Oil-in-Water (S/O/W) emulsions to fabricate delivery systems. The impact of the concentrations of propylene glycol alginate and Xanthan gum (PGA-XG) complexes on the physical stability and structural characteristics of S/O/W calcium-lipid emulsions microspheres were studied. The S/O/W calcium-lipid emulsions were characterized by the particle size, zeta potential, physical stability, and apparent viscosity. The S/O/W calcium-lipid emulsion has higher physical stability (including 6-week storage at 4°C), smaller mean particle size (7.60 ± 1.10 μm), and higher negative zeta-potential (45.91 ± 0.97 mV) when the concentration of PGA-XG complexes was 0.8 wt%. Moreover, Confocal laser scanning microscopy (CLSM) images confirmed that the CaCO3 powders were encapsulated in the O phase. Transmission electron microscopy (TEM) showed that S/O/W calcium-lipid emulsion was spherical. The X-ray diffraction (XRD) analysis further confirmed that CaCO3 was loaded in the S/O/W calcium-lipid emulsion as an amorphous state. The formation mechanism of S/O/W calcium-lipid microspheres was studied by Fourier transform infrared spectroscopy (FTIR) and Raman spectrum analysis. This study provided new ideas that accelerate the creation of a novel type of calcium preparation with higher quality utilization.
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
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IF 10.753
Peiling Han,Jiayin Xie,Xueming Qin,Xinru Yang,Yongsheng Zhao
Micron zero valent iron (mZVI) was an underground remediation material, which had great application potential to replace nano zero valent iron (nZVI) from the perspective of economic and health benefits. However, mZVI was highly prone to gravitational settling, which limited its wide application for in situ remediation of contaminated groundwater. This paper was devoted to develop an efficient and economical groundwater remediation material based on mZVI, which should possess excellent stability, reactivity, and transportability. Thereby xanthan gum (XG) stabilized and Na 2 S 2 O 4 sulfidated mZVI (XG-S-mZVI) was synthesized and characterized with SEM, XRD , XPS , and FTIR techniques. In terms of stability, the adsorbed XG and the dispersed XG worked together to resist the sedimentation of S-mZVI. In terms of reactivity, sulfidation enhanced the electron transfer rate and electron selectivity of XG-S-mZVI, thereby improved the reactivity of XG-S-mZVI. The hexavalent chromium (Cr(VI)) removal rate constant by XG-S-mZVI was determined to be 832.4 times than bare mZVI. In terms of transportability, the transportability of XG-S-mZVI was greatly improved (~80 cm in coarse sand and ~50 cm in medium sand). Straining was the main mechanism of XG-S-mZVI retention in porous media . XG-S-mZVI in situ reactive zone (XG-S-mZVI-IRZ) was only suitable to the media with a grain size larger than 0.25 mm. This study could provide theoretical support and guidance for the implementation of IRZ technology based on mZVI.
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