COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Zilu Li,Kefei Zhao,Yue Wang,Zirui Zheng,Chenhui Zhang,Yuxia Gao,Fengpei Du
Impact and spread of droplet on superhydrophobic surface are ubiquitous in inkjet printing , pesticide spraying, paint coating, and other fields. However, due to the extremely water-repellent properties of superhydrophobic surface, droplets frequently splash or roll off, causing great waste and serious environmental problems. Thus, searching for an effective strategy to regulate the droplet splash and spread on superhydrophobic surfaces is of remarkable significance. To address the above issues, herein, we demonstrate the controllable regulation on superhydrophobic lotus leaf surface by tuning the double-chain length of surfactants . The outcomes indicate different regularities for droplet splash in a short time (~10 ms) and spread in a relatively long period (~100 s). It can be concluded that dynamic surface tension of surfactant, diffusion rate of surfactant from the bulk to the interface, and assembly disaggregation rate dominate the impact process, whereas the adsorption kinetic and effectiveness of surfactant along with the spreading driving force determine the wetting transition. Surfactant owning suitable hydrophilic and hydrophobic ratio, fast diffusion rate, and unstable assembly could inhibit droplet splash and improve spreading pronouncedly, thereby enhancing the droplet deposition on superhydrophobic surfaces. This study makes original contribution to screen suitable surfactants from the structural aspects, especially double-chain length, which has not been treated in much detail to date. Our work not only creates a big impetus in illuminating the mechanism of surfactant molecular structure on droplet deposition processes but also greatly expands the applications of surfactant in many fields.
研究领域:
胶体与界面化学
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农业化学
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材料科学
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流体力学
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环境科学
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应用物理
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纳米科技
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2017
·Vol. 41
·期 22
·13319-13326
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IF 3.269
Xiuling Xu,Fan Hu,Qi Shuai
Two novel Ba(II) complexes [Ba(TCPA)2(H2O)4] 1 and [Ba(H2O)8]·2(o-FcCOC6H4COO)·6H2O 2 [HTCPA = 2,4,6-trichlorophenoxyacetic acid and o-HOOCC6H4-COFc = o-ferrocenylcarbonyl benzoic acid] have been synthesized by a facile microwave method. The solid-state structures were well established by means of X-ray crystallography as well as routine analysis of the infrared spectrum (FTIR), elemental analysis, field emission scanning electron microscopy (FESEM) and thermogravimetric analysis (TG). Different polyhedra of tricapped triangular prisms for 1 and dodecahedra for 2 were present. It is worth noting that the central Ba(II) ion in 1 is nine-coordinated by two carboxylate oxygen atoms from TCPA ligands and seven oxygen atoms from coordinated water molecules. By contrast, the eight-coordinated Ba(II) in 2 forms barium-water clusters assembled by O–H⋯O hydrogen-bonds contributed by coordinated water molecules. The uncoordinated o-OOCC6H4-COFc ligands in 2 play a key role in the process of charge balance. FESEM images exhibited different surface appearances between the ligand and barium complexes, that is: flower-like HTCPA, branch-like o-HOOCC6H4-COFc, block-like complex 1 and corner-truncated cubes for complex 2. The allelopathic activity of the complexes and their corresponding ligands was evaluated against two herbaceous plants of barnyard grass and turnip (Raphanus sativus). All the tested compounds showed certain activity with good RI values. An antifungal bioassay was also carried out in vitro on three strains of Botrytis cinerea Pers., Glomerella cingulata Schr and Cytospora sp. Complex 1 and HTCPA can work against all three tested fungi, whereas o-HOOCC6H4-COFc and 2 only worked for Botrytis cinerea Pers. The complex presented in this paper has potential applications in weed control, and this work provides an experimental basis for future studies on Ba-based pesticides.
研究领域:
无机化学
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金属配合物化学
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农业化学
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晶体工程
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植物生理学
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农药学
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生物活性评估
✓ 已验证
DOI
高影响因子
POLYMER BULLETIN
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2014
·Vol. 71
·期 11
·2923-2944
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IF 1.491
Yan Huiqiong,Chen Xiuqiong,Wu Tiantian,Feng Yuhong,Wang Chunxiu,Li Jiacheng,Lin Qiang
The surface modification with poly(methyl hydrosiloxane) (PMHS) using a grinding method as a pesticide carrier had been successfully achieved. The characteristics of the modified kaolin were represented by Fourier transform infrared, X-Ray diffraction, BET specific surface area measurements, laser particle size analysis, transmission electron microscopy and contact angle measurement. Subsequently, immobilization of acetamiprid onto clay’s surface was carried out by means of freeze-drying technology. And the drug-loaded clays were encapsulated in alginate-chitosan composite beads by extrusion into calcium chloride solution. The composite beads showed regularly spherical shapes and uniform sizes with diameters of 1.44 ± 0.24–1.75 ± 0.19 mm. The immobilization and release of acetamiprid were carried out to examine the effect of the modified kaolin on the properties of the composite bead. The results showed that the intensive force of superfine pulverization during the grinding process was effective to increase the specific surface areas of the modified kaolin with particle size reduction. The modified kaolins as promising carrier materials had improved the drug loading rate and encapsulation efficiency from 4.15 and 42.01 % for alginate-chitosan composite beads to 6.02 and 82.95 %, which were higher than 4.33 and 54.29 % for SA-CS-kaolin composite beads, respectively. The controlled-release formulation containing the modified kaolin had shown slow and sustained release properties to promote the efficient use of organic pesticide to reduce pollution effect on the environment.
研究领域:
材料科学
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农业化学
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药物递送系统
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环境友好材料
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粘土矿物加工
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
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2017
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IF 7.504
Jiazhuo Xie,Yuechao Yang,Bin Gao,Yongshan Wan,Yuncong C. Li,Jing Xu,Qinghua Zhao
The development of efficient biobased controlled-release fertilizers has captured much research attention because of the environmental concerns and food scarcity problems. In this work, a biomimetic superhydrophobic biobased polyurethane-coated fertilizer (SBPF) was successfully fabricated by increasing surface roughness and reducing surface energy of polyurethane (PU) coating. The green PU coating was synthesized from low-cost, biodegradable, and renewable cottonseed oil. The nutrient release longevity of SBPF revealed 2-fold enhancement compared with the normal biobased PU-coated fertilizer (BPF). The significant improvement of nutrient release characteristics can be attributed to the atmosphere “outerwear” which ensured the nonwetting contact of water with superhydrophobic surfaces in gas state instead of in liquid state. The new concept introduced in this study can inform the development of the next generation of biobased controlled release fertilizers.
研究领域:
农业化学
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材料科学
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可持续农业
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高分子科学
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环境科学
✓ 已验证
DOI
高影响因子
PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY
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2019
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IF 2.87
Wei Yan,Xing Wang,Ke Li,Tian-Xi Li,Jia-Jie Wang,Kai-Cheng Yao,Ling-Ling Cao,Shuang-Shuang Zhao,Yong-Hao Ye
Succinate dehydrogenase (SDH) is demonstrably one of the most important molecular targets in development of new fungicide . In our continuous efforts to discover novel SDH inhibitors, forty-two carboxamide derivatives containing 1,2,3-triazole ring were designed and synthesized, which were precisely characterized by 1 H NMR, ESI-MS, elemental analysis and X-ray single-crystal diffraction. The compounds were screened for antifungal activities against phytopathogenic fungi by mycelia growth inhibition assay in vitro. Compound A3-3 exhibited significant antifungal activity against Sclerotinia sclerotiorum , Botrytis cinerea , Rhizoctonia cerealis and Gaeumannomyces graminsis with EC 50 values of 1.08, 8.75, 1.67 and 5.30 μg/mL, respectively, comparable to those of commercial SDHI boscalid. In vivo testing demonstrated that A3-3 was effective for suppressing rape sclerotinia rot, cucumber grey mould and wheat powdery mildew caused by S. sclerotiorum ， B. cinerea and Blumeria graminis at a dosage of 200 μg/mL. Inhibition activities against SDH test proved the designed analogues were effective in the enzyme level. The molecular docking simulation revealed that A3-3 interacted with ARG43，TYR58 and TRP173 of the SDH through hydrogen bond and pi-pi interaction, which could explain the probable mechanism of action between the inhibitor and target protein.
研究领域:
农业化学
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药物化学
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杀菌剂开发
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生物有机化学
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植物病理学
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酶抑制
✓ 已验证
DOI
高影响因子
Journal of Saudi Chemical Society
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2016
·Vol. 21
·期 3
·315-323
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IF 1.978
Pei-Yi Wang,Ling Chen,Jian Zhou,He-Shu Fang,Zhi-Bing Wu,Bao-An Song,Song Yang
In this paper, a variety of 1-aryl-4-hydroxy-1 H -pyrrol-2(5 H )-one derivatives bearing 1,3,4-oxadiazole moiety were designed and synthesized. Preliminary bioassays suggested that these compounds not only exhibited favorable antibacterial activity toward plant pathogenic bacteria including Xanthomonas oryzae pv. oryzae ( Xoo ), Ralstonia solanacearum ( R. solanacearum ), and Xanthomonas axonopodis pv. citri. ( Xac ), but also demonstrated certain curative and protective activities against Tobacco mosaic virus (TMV). Further studies revealed that compounds 8a and 8l exerted the best inhibition effect against Xoo with the half-maximal effective concentration (EC 50 ) values of 8.6 and 7.3 μg/mL, respectively, which were better than that of commercial agricultural antibacterial bismerthiazol (EC 50 = 92.6 μg/mL). Given the above results, this kind of compounds can be further studied and explored as alternative antibacterial agents.
研究领域:
药物化学
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农业化学
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抗菌剂
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病毒学
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有机合成
✓ 已验证
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2016
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IF 2.857
Shaoyu Lü,Chen Feng,Chunmei Gao,Xinggang Wang,Xiubin Xu,Xiao Bai,Nannan Gao,Mingzhu Liu
Fertilizer is one of the most important elements of modern agriculture. However, conventional fertilizer, when applied to crops, is vulnerable to losses through volatilization, leaching, nitrification, or other means. Such a loss limits crop yields and pollutes the environment. In an effort to enhance nutrient use efficiency and reduce environmental pollution, an environmental smart fertilizer was reported in the current study. Poly(aspartic acid) and a degradable macro-cross-linker based on l-aspartic acid were synthesized and introduced into the fertilizer as a superabsorbent to improve the fertilizer degradability and soil moisture-retention capacity. Sustained release behavior of the fertilizer was achieved in soil. Cumulative release of nitrogen and phosphorus was 79.8% and 64.4% after 30 days, respectively. The water-holding and water-retention capacities of soil with the superabsorbent are obviously higher than those of the control soil without superabsorbent. For the sample of 200 g of soil with 1.5 g of superabsorbent, the water-holding capacity is 81.8%, and the water-retention capacity remains 22.6% after 23 days. All of the current results in this study indicated that the as-prepared fertilizer has a promising application in sustainable modern agriculture.
研究领域:
农业化学
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可持续农业
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环境科学
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土壤学
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高分子科学
✓ 已验证
DOI
高影响因子
Materials Today Chemistry
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2024
·
IF 6.7
Hongchun Li,Jie Xu,Yongsheng Niu
The pH-responsive pesticide delivery system can enhance utilization efficiency of pesticides and reduce environmental pollution. Herein, an environmental and amphiphilic carbon dioxide-based copolymer , poly(propylene oxide-co-carbon dioxide-co-allyl glycidyl ether)-poly(polyacrylic acid)-methoxy poly(ethylene glycol) (PPAG-PAA-mPEG), was synthesized to fabricate a pH-responsive pesticide delivery system. The avermectin (AVE) was selected as a model drug to show PPAG-PAA-mPEG potential as a controlled-release pesticide system. The entrapment efficiency and the loading content of the AVE-loaded micelles was 88.6 % and 36.98 %, respectively. The AVE-loaded micelles were stable. The release rate of AVE gradually increased with the increase of pH. Pot trial showed that the AVE-loaded micelles showed a good pesticidal efficacy. Because of CO 2 as raw materials, and excellent pH-responsive controlled-release performance, these on-demand pesticide delivery systems might have significant potential in improving the utilization efficiency of pesticides in modern agriculture.
研究领域:
农业化学
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高分子科学
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药物递送系统
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环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）