JOURNAL OF MOLECULAR LIQUIDS
·
2021
·
IF 6.165
Zilu Li,Zehuan Li,Yuxia Gao,Chenhui Zhang,Kefei Zhao,Yongfei Guo,Zhenping Bao,Tianyue Wu,Xiangdong Li,Fengpei Du
Improving the liquid deposition on plant leaves is crucial during pesticide spraying. However, the hydrophobicity of most plant leaf surfaces makes the droplet splash or run off, finally reducing the efficacy of the foliar-applied pesticide. Though some molecular additives have been employed to regulate the above process, the understanding about the mechanism and the effect of molecular structure is still limited. Herein, cationic surfactants with different double-chain lengths (8–14) are adopted to regulate the droplet impact and wetting on hydrophobic paraffin surface (simulating leaves). With the surfactant chains extending, the capacity for restraining retraction and promoting wetting increases firstly, and then decreases. It can be attributed to that the surfactant with shortest chain cannot form assemblies to inhibit retraction, as the chain length increases, the small-sized micelles reduce but the vesicles become larger and firmer thus the self-assemblies scarcely disaggregate to replenish the monomer at interface during impact. Likewise, short-chain surfactant diffuses faster to interface than long-chain surfactant due to the size effect and hydrophilic/hydrophobic ratio. Our work not only elucidates the mechanism of droplet impact and wetting dynamics by tuning the assemblies aggregation and surfactant diffusion but also promotes the promising application of surfactant in pesticide spraying.
研究领域:
植物学
·
农药科学
·
界面化学
✓ 已验证
产品关联
DOI
高影响因子
CORROSION SCIENCE
·
2022
·
IF 7.72
Tianyu Zheng,Jinyan Liu,Meihui Wang,Qian Liu,Jia Wang,Yao Chong,Guixiao Jia
The corrosion resistance of Q235 steel treated with pure thiourea, dodecyl trimethyl ammonium bromide (DTAB), dodecyl dimethyl benzyl ammonium bromide (DDBAB), and their mixture (i.e. DTAB-Thiourea, DDBAB-Thiourea) in sulfuric acid was studied. Results showed that DTAB-Thiourea and DDBAB-Thiourea have strong synergistic effects (4.86 and 5.99) and could inhibit corrosion by 93.37% and 94.98%, respectively. These effects are attributed to a decrease in the steric hindrance due to changes in the molecular adsorption mode of the corrosion inhibitors . The adsorption forms of all inhibitors on the steel surface were investigated and explained using density functional theory.
研究领域:
材料科学
·
电化学
·
理论化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Maocai Shen,Tong Hu,Wei Huang,Biao Song,Guangming Zeng,Yaxin Zhang
Effluent discharge from wastewater treatment plants (WWTPs) is an important source of microplastics, which has attracted worldwide attention. Tertiary sewage treatment of microplastics in WWTPs has also been implemented. In this paper, microplastic removal by aluminosilicate filter media and their cationic surfactant modified products as the potential low-cost integrated material was studied. The role of modified aluminosilicate filter media in the removal of microplastics from WWTPs has not been focused on in the previous studies. The concentration of microplastics with particle size<10 μm in wastewater was not clear due to the exclusion in many studies and the difficulty in quantification. The granular polyethylene microplastic (PE, 10 μm) and fibrous polyamide microplastic (PA, 100 μm) were selected based on their frequent detection in sewage samples. According to a series of column test and further analysis, the immobilization and removal mechanisms of microplastics by filter were explored. Current results demonstrated that aluminosilicate filter media modified by cationic surfactant had a significant removal (>96%) and fixation capacity for PE and PA, which is much greater than that of rapid sand filter (63%). The obtained scanning electron microscopy (SEM) images showed three morphological retention mechanisms: captured, trapped and entangled. The negatively charged microplastics can also be directly electrostatically bonded with the positively charged HDPB head base. The entangled fixation mechanisms provided a higher removal efficiency of microplastics in wastewater for the modified aluminosilicate filter media than the rapid sand filter. The modified materials provided a wide range of potential for the immobilization of microplastic in wastewater treatment process. In principle, this performance can be further studied and utilized to improve the removal efficiency of microplastics in WWTPs.
研究领域:
环境科学
·
材料科学
·
污水处理
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Zhenyu Wang,Zhu Tu,Lulu Lu,Zefeng Wang,Minghua Yang
The addition of the surfactant can greatly reduce the moisture content of the sludge. But little research has been done on the synthesis of surfactants and the mechanism of dehydration. Thus, a novel cationic surfactant ZWY-28 with higher surface activity and more surface charge was investigating for sludge dewatering in this research. Results showed that when the content of ZWY-28 was 1% (0.14 g/L), the specific resistance to the filtration of sludge had a minimum value of 2.04 × 10 12 m/kg, the moisture content of the dehydrated sludge cake reached a minimum of 78.9%, the bound water reduced to 6.32 g/g, decreased by 39.2%. What’s more, the ZWY-28 is extremely helpful in releasing Extracellular polymers substances from sludge, lead to the removal of bound water, which is the key point of affecting sludge dewatering. The study clearly illustrated that the surfactant ZWY-28 accelerated the dewatering process and could be used as a potential agent for sludge. Meanwhile, it provides ideas for the selection and structure design of surfactants in sludge dewatering.
研究领域:
环境工程
·
胶体与界面化学
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废水处理
·
污泥处理
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Liang Xiao Gan,Chun Ling Hao,Xiao Ming Jiang
The adsorption and desorption of surfactants play an important role in the industrial processes. We used cucurbituril (Q[7]) to tune the adsorption and desorption of a cationic surfactant at quartz. The cationic surfactant, N-Benzyl-N-hexadecyl dimethylammonium halide , can spontaneously absorb on the quartz surface. But when the absorbed surfactant at quartz reacts with Q[7] to form the host-guest complex, the absorbed surfactant is desorbed from the quartz surface. Adamantanamine hydrochloride was selected as another stronger guest molecule. Owing to the higher binding constant , Q[7] preferentially complex adamantanamine. Therefore, the surfactant molecules in the cavity of Q[7] are expelled to the water–quartz interface and absorb again on the quartz surface. In this manner, the adsorption and desorption of the cationic surfactant can be modulated. Through the measurements of the surface activity, contact angle and Zeta potential , we studied the adsorption and desorption of the cationic surfactant at quartz. The real-time adsorption and desorption of the cationic surfactant were monitored by the quartz crystal microbalance with dissipation (QCM-D). The surfactant aggregates on the quartz surfaces were scanned by the atomic force microscope (AFM). We expect to provide a way of tuning the adsorption and desorption of surfactants on solid surfaces .
研究领域:
界面科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2019
·
IF 2.752
Simin Shen,Ming Kang,Ai Lu,Kexu Chen,Xiangmeng Lv,Lu Yuan,Rong Sun
Fluorescence-labeling SiO 2 microspheres (SiO 2 @CTAB@Eu(DBM) 3 phen complexes) were prepared in a physisorption method, which the cationic surfactant CTAB was used to modified the surface of SiO 2 through electrostatic interaction and then rare earth (Eu(DBM) 3 phen) was attached onto the modified SiO 2 microspheres by means of intermolecular force . The as-prepared phosphors were characterized by techniques of field-emission scanning electron microscopy (FESEM), transmission electron microscope (TEM), thermal gravimetric analysis and differential scanning calorimeter (TGA-DSC), and photoluminescence spectra (PL). The results showed that the phosphors exhibited a strong red emission peak under the excitation wavelength of 360 nm and fluorescence quantum efficiency up to 59.8%. The fluorescent intensity increased with the increment of Eu(DBM) 3 phen addition from 7.0 wt% to 17.0 wt%. Meanwhile, SiO 2 @CTAB@Eu(DBM) 3 phen complexes can maintain its luminescence in the alkaline solution with pH of 8–12. Additionally, they exhibited outstanding thermal stability. Properties and preparation method of phosphors provide an important basis for application in optoelectronic devices, bio-imaging and the packing structural composites .
研究领域:
材料科学
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光学
·
生物成像
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Zilu Li,Yue Ma,Kefei Zhao,Chenhui Zhang,Yuxia Gao,Fengpei Du
The addition of a surfactant is a constructive strategy to enhance the deposition of pesticides on plant leaves in agriculture. However, currently used surfactants normally require to be used at high concentrations, and most of them are anionic or nonionic. In this work, we found that didecyldimethylammonium bromide (DDAB), a double-chain cationic surfactant, can not only inhibit droplets from receding and rebounding but also promote sufficient spreading on paraffin and Chenopodium album L. leaf surfaces at an ultralow concentration (0.05%), in comparison with widely reported sodium dodecyl sulfate (SDS) and bis(2-ethylhexyl)sulfosuccinate (AOT). This phenomenon is attributed to the fast adsorption kinetics of DDAB from the bulk to the newly created interface (mere 100 ms), decreasing the surface tension significantly. Field experiments further prove that the addition of DDAB can significantly improve the control efficiency of herbicides. Our findings provide a simple and effective way for improving the droplet deposition on hydrophobic plant surfaces, which may lead to economic and environmental benefits in the future.
研究领域:
植物学
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农业科学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2017
·
IF 1.815
Shiliang Wei,Kun Jia,Hongguo Shou,Xuefei Zhou,Pan Wang,Xiaobo Liu
Polyarylene ether nitrile (PEN) is traditionally used as high performance thermoplastics in various advanced engineering materials fields. However, the preparation of optically active PEN based materials, especially in aqueous solution, is still a great challenge. In this work, the side chain carboxylated PEN can be readily dissolved in alkaline solution but showing strongly quenched luminescence. Fortunately, the cationic surfactant of cetyltrimethylammonium bromide (CTAB) was able to recover the fluorescence emission of water soluble PEN, which can be subsequently quenched by Fe 3+ ions, leading to the selective determination of Fe 3+ ions in aqueous solution.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Shasha Jiang,Weilin Qi,Cheng Ma,Tongyue Wu,Xiaoyu Li,Xingyue Chen,Shuitao Gao,Jinwan Qi,Yun Yan,Jianbin Huang
Precipitates occur readily in the aqueous mixture of cationic and anionic surfactants. We report that the precipitates formed in the catanionic surfactant systems at charge ratios deviated from 1:1 can be solubilized by simply increasing the total surfactant concentrations. At higher concentrations, there are vesicles in the supernatant, which will sequester the monomer surfactant in equilibrium with the precipitates. This shifts precipitation-solvation equilibrium continuously. As a result, the precipitates vanish when all the surfactants in the precipitates are taken into the vesicles. In this way, a high-concentration stable phase (HCSP) can be formed in the precipitated surfactant systems, which can be generalized to all catanionic surfactant systems. We envision the concentration-triggered HCSP is very promising in guiding the large-scale application of catanionic surfactants.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
BIOORGANIC CHEMISTRY
·
2023
·
IF 5.1
Xuejiao Wang,Yuting Liu,Tongyue Wu,Biaofeng Gu,Hao Sun,Huanling He,Haiqin Gong,Hu Zhu
The commercial cationic surfactants (CSAa) with quaternary ammonium (QA) groups have proved to be broad-spectrum bactericide against bacteria, fungi, and viruses. Nevertheless, they inevitably exhibit potent irritation on the skin. In this work, we systematically investigated the regulatory mechanism of the host-guest supramolecular conformation with β-cyclodextrin (β-CD) on the bactericidal performance and skin irritation of CSAa with different head groups and chain lengths. When the ratio of incorporated β-CD is not greater than 1:1, the bactericidal efficiency of CSAa@β-CD (n > 12) remained above 90 % due to the free QA groups and hydrophobic fraction that can act on negatively charged bacterial membranes. And once the ratio of β-CD exceeded 1:1, the β-CD attracted to the bacterial surface by hydrogen bonding might prevent CSAa@β-CD from acting on bacteria, resulting in a decrement in antibacterial performance. Even so, the antibacterial activity of CSAa with long alkyl chains (n = 16, 18) was independent from the complexation of β-CD. Accordingly, both the zein solubilization assay and the neutrophil migration assay on zebrafish skin evidenced that β-CD attenuated the interaction of surfactant with skin model proteins and the inflammatory effect on zebrafish, thereby enhancing skin mildness. In this way, we hope to create a simple but effective brainpower using the host-guest approach to guarantee both bactericidal efficiency and skin mildness without modifying the chemical structure of these commercial biocides.
研究领域:
生物学
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医学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SURFACTANTS AND DETERGENTS
·
2023
·
IF 1.6
Hefei Wang,Dong Wang,Wei Ren,Tian Tian
The utilization of natural clay minerals for the adsorption of endocrine-disrupting chemicals (EDCs) presents a cost-effective and environmentally friendly approach. However, the hydrophilic nature of clay minerals' surface limits their efficacy in removing these hydrophobic pollutants. To overcome these limitations, this study employed two cationic surfactants, cetylpyridinium chloride (CPC) and cetyltrimethylammonium chloride (CTAC), to modify kaolin minerals to enhance their capacity to adsorb a specific type of EDCs, bisphenol A (BPA), and its analogs. The experimental results validated that the surfactant-modified kaolin exhibited remarkable efficiency in removing BPA from water. The equilibrium adsorption capacities of CPC-K and CTAC-K for BPA were determined to be 11.4 mg/g (pH = 2.0–8.0) and 13.4 mg/g (pH = 2.0–6.5), respectively. Kinetic analysis revealed that the BPA adsorption followed a pseudo-second-order kinetic process, while isotherm analysis suggested that the BPA adsorption was better described by the Freundlich model ( R 2 = 0.993–0.998). The surfactant-modified kaolin demonstrated a retention of over 70% of its initial adsorption capacity after five cycles of desorption and regeneration, further confirming its potential for recycling. Additionally, these modified adsorbents exhibited excellent compatibility in removing bisphenol analogs. These findings provide valuable insights into the practical application of surfactant-modified clay minerals for the elimination of hydrophobic organic pollutants from water. Graphical Adsorption of bisphenol A onto cetylpyridinium chloride (CPC) and cetyltrimethylammonium chloride (CTAC) modified-kaolin minerals
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2025
·Vol. 15
·期 1
·1-11
·
IF 3.9
Li Jia,Wen Ming,Jiang Zeyin,Gao Shangjun,Xiao Xiao,Xiang Chao,Tao Ji
A Gemini cationic surfactant was synthesized through an aldehyde-amine condensation reaction to address challenges related to bacterial corrosion and foaming during shale gas extraction. This treatment agent exhibits sterilization, corrosion mitigation, and foaming properties. The mechanism of action was characterized through tests measuring surface tension, particle size, sterilization efficacy, corrosion mitigation efficiency, and foaming behavior. Results from the surface tension test indicate that at 60 °C, surfactants with a low carbon chain structure achieve the lowest surface tension of 32.61 mN/m at the critical micelle concentration. Particle size distribution (PSD) tests reveal that within the 1–10 critical micelle concentration range, three types of surfactants can form aggregates through self-assembly, with a PSD range of 100–400 nm. Antibacterial performance tests demonstrate that a concentration of 0.12 mmol/L at 20–60 °C achieves a bactericidal rate exceeding 99%, maintained even after 24 h of contact. The bactericidal effect is enhanced under acidic and alkaline conditions. Corrosion mitigation tests show that at 50 °C, the corrosion mitigation rate reaches an optimal value of over 70%. Bubble performance evaluation results suggest that the optimal surfactant concentration is 1 mmol/L at 60 °C, exhibiting resistance to mineralization up to 200 g/L. The development of this surfactant establishes a foundation for effectively addressing issues related to bacterial corrosion and wellbore fluid encountered in shale gas wells.
研究领域:
化学工程
·
石油工程
·
材料科学
✓ 已验证
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）