DESALINATION
·
2021
·
IF 9.501
Samuel Ntakirutimana,Wei Tan
Hybridization of carbon with metal compounds has gained substantial attention in the development of robust electrodes for capacitive deionization (CDI). A composite of activated carbon (AC) with titania (TiO 2 ) was concocted via Tween 80-assisted sol-gel process. The effects of Tween 80 on AC particles interaction with titanium tetraisopropoxide (TTIP) and properties of the composite were systematically scrutinized by multiple analytical techniques including scanning electron microscopy (SEM), laser diffraction (LD), contact angle (CA) measurement, X-ray diffraction (XRD), nitrogen sorption isotherms and X-ray photoelectron spectroscopy (XPS). Electrochemical characterization was conducted by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS). The results show the essential role of Tween 80 for homogeneous bonding of titania and altering characteristics of AC-T80/TiO 2 composite. As such, the composite exhibited enhanced specific capacitance , and efficiency owing to the modulated benchmark properties (wettability, homogeneity, structure, and conductivity). Subsequently, the composite delivered the salt adsorption capacity (SAC) of 17.1 mg g −1 (26% higher than surfactant-free composite) at 1.4 V, with outstanding capacity retention (87%) over 150 cycles in oxygen saturated saline water (10 mM). This work discloses a novel strategic approach for carbon-metal compound composites synthesis with fundamental aspects for CDI application.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Environmental Sciences
·
2014
·
IF 1.922
Hewei Ni,Wenjun Zhou,Lizhong Zhu
The use of surfactants to enhance plant-microbe associated dissipation in soils contaminated with polycyclic aromatic hydrocarbons (PAHs) is a promising bioremediation technology. This comparative study was conducted on the effects of plant-microbe treatment on the removal of phenanthrene and pyrene from contaminated soil, in the presence of low concentration single anionic, nonionic and anionic-nonionic mixed surfactants. Sodium dodecyl benzene sulfonate (SDBS) and Tween 80 were chosen as representative anionic and nonionic surfactants, respectively. We found that mixed surfactants with concentrations less than 150 mg/kg were more effective in promoting plant-microbe associated bioremediation than the same amount of single surfactants. Only about ( m/m ) of mixed surfactants was needed to remove the same amount of phenanthrene and pyrene from either the planted or unplanted soils, when compared to Tween 80. Mixed surfactants (< 150 mg/kg) better enhanced the degradation efficiency of phenanthrene and pyrene via microbe or plant-microbe routes in the soils. In the concentration range of 60–150 mg/kg, both ryegrass roots and shoots could accumulate 2–3 times the phenanthrene and pyrene with mixed surfactants than with Tween 80. These results may be explained by the lower sorption loss and reduced interfacial tension of mixed surfactants relative to Tween 80, which enhanced the bioavailability of PAHs in soil and the microbial degradation efficiency. The higher remediation efficiency of low dosage SDBS-Tween 80 mixed surfactants thus advanced the technology of surfactant-enhanced plant-microbe associated bioremediation.
研究领域:
环境科学
·
土壤修复
·
生物技术
✓ 已验证
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2023
·
IF 7.8
Wei Zhang,Heng Li,Siqiang Xiao,Jianfei Wu,Chuanhu Wang,Xiaobin Liu,Qingbiao Li,Yanmei Zheng
Controllable delivery of persulfate (PS) and the enhancement of oxidative availability of pollutants in in-situ oxidative remediation of low-permeability polycyclic aromatic hydrocarbons (PAHs) contaminated soil are crucial. To tackle the above challenges, the coupling of Tween 80 solubilization enhanced oxidation of phenanthrene (PHE) in low-permeability soil under electrokinetic remediation (EKR) was proposed. Firstly, batch degradation experiments showed that the addition of Tween 80 significantly inhibited the degradation of PHE in soil under thermally activated PS, as the dosage of Tween 80 increased from 0 % to 1 % with the corresponding removal rate declining from 99.19 % to 40.90 %. Accordingly, in-situ electrokinetic delivery of Tween 80 and PS was regulated in further EKR, intending to reduce unproductive consumption. PS was more uniformly delivered to the whole remediation regions from the cathode chamber by electromigration , while Tween 80 was transported into the soil from the anode chamber by electroosmosis , which made Tween 80 solubilization and PS oxidation achieve synergistic effect . And the total removal rate of PHE reached 64.90 % under this strategy, which had increased by 415.90 % and 8.76 %− 130.14 % compared with only EKR or EKR coupling single enhanced technology , respectively. After further thermal activation of transported PS at 50 ℃ by electrical resistance heating, the total removal rate of PHE increased to 71.58 %. EPR spectrum indicated that SO 4 . - and OH . were responsible for the degradation of PHE.
研究领域:
环境科学
·
化学工程
·
土壤修复
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
·
2021
·
IF 3.205
Manman Wang,Zheyan Chen,Xiaofeng Jing,Huan Zhou,Ying Wang,Jiannong Ye,Qingcui Chu
Low-molecular-weight thiols are widely present in human fluids, and are regarded as a kind of potential broad-spectrum evaluation indicators for some clinical diseases. In this work, gold nanoparticles capped with Tween 20 were used for purification and microextraction of the main free thiols (cysteine, homocysteine, glutathione and methionine) in saliva based on Au-S bond formation. Ultrasound further sped up the releasing of the target analytes, and the releasing time needed was only 10 min, and the required sample volume was only 40 µL. The desorption solution could be directly injected for electrophoretic analysis without derivatization , and field-amplified sample stacking of electrophoretic online enrichment technology further improved the detection sensitivity. The synergistic enrichment effect made the enrichment factors of four analytes reach 1119–2067 times. This developed method was applied for the analyses of saliva samples of healthy volunteers. Acceptable sensitivity (LODs: 0.15–1.5 ng mL −1 ) and recoveries (97.6–116%) were obtained in the saliva sample matrix. This proposed method provides an alternative for the sensitive detection of low-molecular-weight thiols in noninvasive body fluids, which has potential application prospect in the preliminary noninvasive diagnosis of diabetes, cardiovascular diseases, etc.
研究领域:
分析化学
·
医学诊断
·
纳米技术
✓ 已验证
DOI
高影响因子
International Journal of Environmental Science and Technology
·
2023
·Vol. 20
·期 12
·13399-13410
·
IF 3.1
Xiong H.,Peng S.,Zhang B.
Nonionic surfactants with ideal surface properties and lower ecotoxicities have been highly attended in metal bioleaching and pollutant bio-treatment in environmental science field. In this study, both Acidithiobacillus ferrooxidans HX3 and Tween 80 (or Triton X-100) presence in cultures, bio-production and development of schwertmannite as a potential metal scavenger were investigated. To explore their correlations, the resulting ferric oxyhydroxides under various surfactant levels (lower/optimal/higher ones for Gp I/II/III treatments) were identified by many characterization methods. Result showed that after 48 h of normally bacterial reproduction, surfactant-rich cultures with Tween 80 more than 50 mg/L (25 mg/L for Triton X-100) could only achieve down 80% of ferrous oxidation percent and 10 7 cells/mL of cell numbers, while those with lower surfactant level were ahead 12 h. Culture pH values decreased to about 2.4 (or 2.0) from initially 2.8. All initial ferric oxyhydroxides were only pincushion-schwertmannite spheres. When cells sequentially reproduced within 36 h–48 h, presence of surfactants (except for Triton X-100 at 75 mg/L) could induce schwertmannite-pincushion assembling on developed spherical particles with a little of diamond-jarosite. And then during bacterial stability state (48 h–72 h), the pincushion assemblages on developed schwertmannite-spheres would disappear, following occurrence of more jarosite amount. Obviously, schwertmannite stability and morphological evolvement were affected by type and level of the added surfactants. These results will give a convincing proof for understanding biomineralization principles of iron minerals in natural environments with nonionic surfactants.
研究领域:
环境科学
·
微生物学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2022
·
IF 3.269
Lu Wang,YingLin Liu,Tianxin Weng,Xinyu Li,Yushu Wu,Yanna Zhao,Jie Liu,Min Liu
Bisdemethoxycurcumin (BDMC), one of the main curcuminoids, has numerous biological activities. However, the low solubility and stability of BDMC limit its application. In this work, in order to improve the solubility and stability of BDMC, we encapsulated BDMC using cetyltrimethylammonium bromide (CTAB) + Tween 20/Tween 60 mixed surfactants. The molar ratio of CTAB to Tween 20/Tween 60 was optimized by response surface analysis. The thermodynamic parameters (binding constant, enthalpy change, entropy change and Gibbs free energy change) for the interaction of BDMC with CTAB + Tween 20/Tween 60 mixed micelles were obtained by fluorescence spectroscopy and UV–visible absorption spectroscopy. Positive enthalpy change and entropy change indicated that hydrophobic interaction was the main driving force. Moreover, due to the longer alkyl chains of Tween 60, the encapsulation of BDMC by CTAB + Tween 60 mixed micelles was stronger. The encapsulation of BDMC in the hydrophobic alkyl chains by the mixed micelles was determined by fluorescence polarization technology, time-resolved fluorescence assay, and 1 H nuclear magnetic resonance spectroscopy. Solubilization and stability experiments showed that the solubility of BDMC was improved and the alkaline hydrolysis of BDMC was inhibited due to the encapsulation of the mixed micelles. The improvement of the solubility and stability of BDMC was more obvious in CTAB + Tween 60 mixed micelles because of the stronger interaction between them. The above results indicated that CTAB + Tween 20/Tween 60 mixed micelles could be used to encapsulate BDMC to improve its solubility and stability.
研究领域:
药学
·
物理化学
·
材料科学
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
·
2023
·
IF 5
Ying Sun,Yongxiang Zhang,Xiaxia Liu,Yan Tingting,Liyan Shen,Dan Ye,Xia Kong,Yonghui Su,Qingping Tian
Transfersomes is one of the most effective nanotechnology-based formulation for transdermal delivery of minoxidil (MXD), however the potential use was limited by its low drug content ( DC ) and entrapment efficiency ( EE ). In this study, efforts have been made to improve DC and EE of MXD in transfersomes for effective topical treatment of alopecia . By dissolving both MXD and edge activator (Tween 80) in aqueous phase than either or both of them co-dissolving in organic solvent with lipids (phospholipid and cholesterol with mass ratio of 5:1), the DC and EE of MXD transfersomes prepared by thin film hydration method were significantly increased. The optimized transfersomes (MT) and its gel (MT gel ) with mass ratio of drug, Tween 80 and lipids 3:1:18 have a spherical morphology without aggregation, and a particle size of not more than 100 nm. The differential scanning calorimetry measurements revealed that the drug in MT was in the non-crystalline state. MT and MT gel exhibited better in vitro transdermal penetration ability and hair of C57BL/6 mice growth-promoting capacity than commercial formulations. MT gel has non-irritation and is better than MT in skin adhesion, stability, potential for skin storage and hair growth promotion ability, which could endow it to be a promising strategy for topical treatment of alopecia.
研究领域:
药剂学
·
纳米技术
·
皮肤科学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2020
·
IF 3.557
Mei Cui,Yuhao Duan,Yuanyuan Ma,Khaled W.A. Al-Shwafy,Yudong Liu,Xudong Zhao,Renliang Huang,Wei Qi,Zhimin He,Rongxin Su
Expansin has nonhydrolytic disruptive activity and synergistically acts with cellulases to enhance the hydrolysis of cellulose. The adsorption–desorption of expansin on noncellulosic lignin can greatly affect the action of expansin on lignocellulose. In this study, three lignins with different sources (kraft lignin (KL), sodium lignin sulfonate (SLS), and enzymatic hydrolysis lignin (EHL)) were selected as the substrates. The real-time adsorption–desorption of Bacillus subtilis expansin (BsEXLX1) on lignins was monitored using quartz crystal microgravimetry with dissipation (QCM-D). The effects of temperature and Tween 80 on the adsorption–desorption behaviors were also investigated. The results show that BsEXLX1 exhibited high binding ability on lignin and achieved maximum adsorption of 283.2, 273.8, and 266.9 ng cm–2 at 25 °C on KL, SLS, and EHL, respectively. The maximum adsorption decreased to 148.2–192.8 ng cm–2 when the temperature increased from 25 to 45 °C. Moreover, Tween 80 competitively bound to lignin and significantly prevented expansin adsorption. After irreversible adsorption of Tween 80, the maximum adsorption of BsEXLX1 greatly decreased to 33.3, 37.2, and 10.3 ng cm–2 at 25 °C on KL, SLS, and EHL, respectively. Finally, a kinetic model was developed to analyze the adsorption–desorption process of BsEXLX1. BsEXLX1 has a higher adsorption rate constant (kA) and a lower desorption rate constant (kD) on KL than on SLS and EHL. The findings of this study provide useful insights into the adsorption–desorption of expansin on lignin.
研究领域:
生物化学
·
酶学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Canadian Journal of Chemistry
·
2022
·Vol. 101
·期 2
·
IF 1.051
Zhimei Wang,Yuehuan Zhang,Qing Chen,Xin Xiao,Carl Redshaw
This study has selected the medium-chain saturated fatty acid pelargonic acid as the raw material for the first time, and added the surface catalyst Tween 80 to the aqueous solution to form pelargonic acid–Tween 80 composite vesicles by a surface tension method. The compound vesicle was used to encapsulate five heterocyclic drugs (cefazolin sodium, chlorpromazine hydrochloride, gemcitabine hydrochloride, metronidazole, and isoniazid), all of which have disadvantages when used directly, and the effects of the vesicles on the five kinds of drugs were evaluated in terms of encapsulation rate and the in vitro sustained release in a simulated artificial intestinal fluid environment. The results revealed that the pelargonic acid–Tween 80 composite vesicles exhibit an encapsulation efficiency above 45%, and that the encapsulated drugs achieve a cumulative release effect of 6–10 h in a simulated artificial intestinal fluid environment, and the cumulative release rate is above 35%. This study proves that pelargonic acid–Tween 80 composite vesicles can be used as a carrier for encapsulated drugs, and this can extend the time of action of the drugs. This research illustrates the potential for application of pelargonic acid in the field of medicine.
研究领域:
药剂学
·
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2025
·
IF 8
Qixin Zhang,Yanyu Chen,Wenyan Liu,Yuanping Ye,Danyun Cheng,Huina Zheng,Leiyan Wu
Parameters such as interfacial tension, dynamics, and rheology are intricately linked to the emulsifying and foaming properties of proteins. In this study, the effects of different Tween types and concentrations on the structure and interfacial characteristics of ovalbumin (OVA) were examined, and their relationships with emulsifying and foaming properties were explored. The results showed that the addition of Tween caused the structure of OVA to become looser and more disordered (β-sheets gradually transformed into β-turns) and exposed more hydrophobic groups. In addition, with the increase in Tween concentration, OVA-Tween systems exhibited lower interfacial tension and could adsorb more rapidly at both the air–water and oil–water interfaces. Additionally, the interfacial elastic modulus of these systems also increased. Compared with natural OVA (EAI = 4.023 m 2 /g, FA = 60.00 %), OVA-Tween showed significantly enhanced emulsifying and foaming abilities. However, higher Tween concentrations (0.1 %) led to competitive adsorption between OVA and Tween, inducing a reduction in the interfacial modulus and a slight decrease in the emulsifying and foaming stability. The emulsifying and foaming performance of the four composite systems were as follows: OVA-Tween 20 > OVA-Tween 40 > OVA-Tween 80 > OVA-Tween 60. Correlation analysis revealed a significant association between the structure and interfacial properties and the emulsifying and foaming performance of OVA-Tween ( p < 0.05). These results demonstrated that Tween can significantly enhance the emulsifying and foaming properties of OVA. The findings provide a theoretical basis for the application of the novel OVA-Tween emulsifier in regulating OVA-based dairy products and baked foods.
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
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Yajie Ding,Nianxiang Qiu,Jianqiang Wang,Zhe Yang,Fu Liu,Chuyang Y. Tang
Oil fouling is an inherent threaten of membrane-based separation of oil-water emulsion, while common physical sieving membrane separation and coalescence demulsification fail to achieve long term applications and combat severe water flux declines. We hereby report an “oil-water-receiving” membrane with anomalous wettability constructed by sub-10 nm Tween 80 assembly on hydrophobic PVDF nanofibers to establish independent water and oil transmembrane passageway. Water can go through the membrane freely along the hydrophilic nanofiber surface. While emulsified oils were diverted beneath the ultra-thin hydrophilic layer and captured by PVDF bulk to form coalesced oil phase and discharged out of the nanofibrous membrane as continuous macroscopic oil phase. The membrane showed stable permeate flux as high as 536 ± 40 L m −2 h −1 bar −1 after 10 h of continuously filtering oil-in-water emulsions. The conformation assembly of surfactants with hydrophilic and hydrophobic chains provides a new strategy to fabricate anti-fouling membranes for oil/water separation.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Nanoscience and Nanotechnology Letters
·
2017
·Vol. 9
·期 2
·123-133
·
IF 1.889
Sha Ruyi,Wu Yuanyuan,Cai Chenggang,Mao Jianwei,Liu Shiwang,Wang Wenxing
Garlic oil has been shown to have many pharmacological and biological activities. However, its poor solubility in water, volatility and instability limit its extensive application in the fields of medicine, cosmetics and food. In this work, nanoscale garlic oil microemulsions were prepared
with canola oil, a canola oil/garlic oil mixture or pure garlic oil as the oil phase, Tween-80 as the surfactant and ultrapure water as the aqueous phase, and the microemulsions were characterized. The influence of the co-surfactant type (glycerol, ethanol and n-butanol) and the mass
ratio of the surfactant to the co-surfactant (K
m) in the oil-in-water (O/W), water-in-oil (W/O), and binary continuous phase (BC) microemulsion regions in pseudoternary phase diagrams were investigated. Moreover, the antioxidant activity of the prepared garlic oil microemulsion
was evaluated. The results showed that when ethanol was used as a co-surfactant, a canola oil monophase microemulsion area of 42.03% can be obtained at a K
m of 2:1 with a particle size of 88.44 nm, and the monophase microemulsion area was approximately 18.55% and 52.54% for
the canola oil/garlic oil mixture as the oil phase at the mass ratios of 10:1 and 5:1, respectively, with a mean particle diameter of 13.33∼14.00 nm. The results also suggested that when using ethanol as the co-surfactant at a K
m of 3:1, the garlic oil monophase microemulsion
area of 52.54% and an O/W microemulsion area of 16.62% could be produced with a size of approximately 15.0 nm. Furthermore, the results showed that a microemulsion of garlic oil/Tween-80/ethanol/water exhibited remarkable antioxidant activity against the superoxide anion, hydroxide radical
and hydrogen peroxide using chemiluminescence methods, with IC50 values of 17.98 mg/mL, 4.17 mg/mL and 8.47 mg/mL, respectively. This study suggested that garlic oil microemulsions may be a promising dispersion for use in food and pharmaceutical products.
研究领域:
食品科学
·
药学
·
生物学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）