Colloid Journal最新文献

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An Insight into the Insecticidal Activity of Green Synthesized Silver Nanoparticles 绿色合成纳米银的杀虫活性研究

4区化学 Q3 Chemistry

Colloid Journal

Pub Date : 2023-10-11 DOI: 10.1134/s1061933x23600045

None Amirthalingam Rajesh, None Gunabalan Madhumitha

引用次数: 0

Effect of Biological Contamination of Copper Surfaces with Extreme Wettability on Their Antibacterial Properties 极润湿性铜表面生物污染对其抗菌性能的影响

4区化学 Q3 Chemistry

Colloid Journal

Pub Date : 2023-10-11 DOI: 10.1134/s1061933x23600641

F. S. Omran, V. V. Kaminsky, K. A. Emelyanenko, A. M. Emelyanenko, L. B. Boinovich

引用次数: 0

Influence of Antidepressant Drug on the Conductivity of Cationic Surfactant 抗抑郁药物对阳离子表面活性剂电导率的影响

4区化学 Q3 Chemistry

Colloid Journal

Pub Date : 2023-10-11 DOI: 10.1134/s1061933x22600555

N. A. Malik, U. Farooq, A. Malik, M. A. Rather

引用次数: 0

Plant Extract-Mediated Synthesis of Ag-Doped ZnO: Eco-Friendly Nanomaterial for Environmental Restoration, Microbial Inhibition, Cell Toxicity, Antioxidant Potential, and Sensing 植物提取物介导的ag掺杂ZnO的合成:用于环境修复、微生物抑制、细胞毒性、抗氧化潜力和传感的环保纳米材料

4区化学 Q3 Chemistry

Colloid Journal

Pub Date : 2023-10-11 DOI: 10.1134/s1061933x23600513

None V. Jagadeeswar, V. Dhinesh, S. Mohana Roopan, E. James Jabaseelan Samuel

引用次数: 0

Interaction of Platinum Nanoparticles Synthesized on Graphite with Nitrous Oxide 石墨表面合成铂纳米粒子与氧化亚氮的相互作用

IF 1.1 4区化学 Q3 Chemistry

Colloid Journal

Pub Date : 2023-10-04 DOI: 10.1134/S1061933X23600392

D. Baimukhambetova, A. K. Gatin, S. A. Ozerin, M. V. Grishin

Abstract—

Heterogeneous catalytic reactions involving nitrous oxide (N₂O) are of great interest for medicine, technology, and ecology. The goal of this work is to determine the features of adsorption of N₂O molecules followed by their interaction with a catalytic system based on metal nanoparticles at room temperature. Scanning tunneling microscopy and spectroscopy, as well as Auger spectroscopy, have been employed to identify the results and products of the adsorption of nitrous oxide on the surface of individual Pt nanoparticles synthesized on highly oriented pyrolytic graphite. It has been shown that, at short exposures, oxygen atoms resulting from dissociative adsorption oxidize the surface of nanoparticles only near the platinum–graphite interface. As the exposure increases, the entire surface of the nanoparticles is covered with oxide. Thus, it has been shown that the adsorption properties of the surface of the platinum nanoparticles on graphite are not the same, and this fact provides the possibility to carry out different chemical reactions on different surface regions, thereby increasing the efficiency of the catalytic system as a whole.

摘要——涉及一氧化二氮（N2O）的多相催化反应在医学、技术和生态学方面都引起了极大的兴趣。这项工作的目标是确定N2O分子的吸附特征，以及它们在室温下与基于金属纳米颗粒的催化系统的相互作用。扫描隧道显微镜和光谱学以及俄歇光谱已被用于鉴定在高取向热解石墨上合成的单个Pt纳米颗粒表面吸附一氧化二氮的结果和产物。研究表明，在短时间暴露下，离解吸附产生的氧原子仅在铂-石墨界面附近氧化纳米颗粒的表面。随着暴露量的增加，纳米颗粒的整个表面都被氧化物覆盖。因此，已经表明铂纳米颗粒的表面在石墨上的吸附性质是不相同的，并且这一事实提供了在不同表面区域上进行不同化学反应的可能性，从而提高了整个催化系统的效率。

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引用次数: 1

Features of Boric Acid Sorption by FIBAN A-5 Anion-Exchange Fiber under Static Conditions 静态条件下FIBAN A-5阴离子交换纤维对硼酸的吸附特性

IF 1.1 4区化学 Q3 Chemistry

Colloid Journal

Pub Date : 2023-10-04 DOI: 10.1134/S1061933X23600495

E. A. Butskikh, I. V. Voronyuk, T. V. Eliseeva, G. V. Medyak, A. P. Polikarpov

Abstract—

Excessive contents of boron and its compounds can exhibit toxic effects despite their necessity for functioning living organisms. An urgent task is to remove them in various ways, including the use of sorption technologies. Boron-selective sorbents with functional OH groups and granular anion exchangers with functional amino groups are capable of extracting boron compounds. This paper is devoted to studying boric acid sorption under static conditions on FIBAN A-5 fibrous sorbent, which shows a high affinity for boron and can be used as an alternative to anion-exchange resins produced in the form of granules. The features of the kinetics and equilibrium of the sorption by the studied fiber brought in contact with boric acid solutions have been studied. It has been found that the time required to reach the equilibrium state decreases with the intensification of stirring and an increase in the concentration gradient in a solution. Sorption isotherms are of a stepwise character due to the existence of boron in different forms at concentrations above 0.025 M. The influence of temperature, pH of a solution, and ionic form of the sorbent on the capacity of FIBAN A-5 fiber has been determined.

摘要——尽管硼及其化合物对生物体的功能是必要的，但过量的硼及其化合物可能会产生毒性作用。一项紧迫的任务是以各种方式去除它们，包括使用吸附技术。具有功能性OH基团的硼选择性吸附剂和具有功能性氨基基团的粒状阴离子交换剂能够提取硼化合物。本文致力于研究静态条件下硼酸在FIBAN A-5纤维吸附剂上的吸附，该纤维吸附剂对硼具有很高的亲和力，可作为以颗粒形式生产的阴离子交换树脂的替代品。研究了所研究的纤维与硼酸溶液接触时的吸附动力学和平衡特性。已经发现，达到平衡状态所需的时间随着搅拌的加强和溶液中浓度梯度的增加而减少。由于硼在浓度高于0.025M时以不同形式存在，吸附等温线具有逐步性质。已经确定了温度、溶液的pH和吸附剂的离子形式对FIBAN a-5纤维容量的影响。

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引用次数: 0

Effect of the Hydrodynamic Conditions for Sodium Alginate–Papain Colloidal System Synthesis on the Sorption Properties of the Biocomposite 海藻酸钠-木瓜蛋白酶胶体体系合成的水动力学条件对生物复合材料吸附性能的影响

IF 1.1 4区化学 Q3 Chemistry

Colloid Journal

Pub Date : 2023-10-04 DOI: 10.1134/S1061933X23600409

S. A. Koksharov, O. V. Lepilova, S. V. Aleeva, G. E. Krichevskii, Yu. S. Fidorovskaya, N. D. Oltarzhevskaya

The regularities have been studied for the formation of molecular associates upon the introduction of papain into a sodium alginate colloidal solution in the laminar low-speed, transient, and turbulent stirring regimes. The relationship between variations in the sorption capacity of the biopolymer composition and the kinetic regularities of the interphase transfer has been studied during the sorption binding of albumin, which is one of the protein-based components of wound exudates, with such components being subject to ensimatic cleavage. The state of the dispersed phase of the colloidal solutions has been estimated by the dynamic light scattering method. The properties of the formed biopolymer films have been studied using the methods of scanning electron microscopy, low-temperature nitrogen adsorption, and static albumin sorption from solutions of limited volumes. The data of the sorption experiments have been analyzed using the Boyd, Morris–Weber, and gel diffusion models, as well as the Lagergren pseudo-first-order and Ho–McKay pseudo-second-order kinetic models. The data have been obtained for substantiating the dosages of the biopolymer matrix used on wound-healing bandages and for the efficient binding of wound necrotic contamination during the time preset according to the technical requirements.

研究了在层流低速、瞬态和湍流搅拌条件下，将木瓜蛋白酶引入藻酸钠胶体溶液中形成分子缔合物的规律。在白蛋白的吸附结合过程中，已经研究了生物聚合物组合物的吸附能力的变化与相间转移的动力学规律之间的关系，白蛋白是伤口渗出液中基于蛋白质的组分之一，这些组分会受到敏化切割。用动态光散射法估算了胶体溶液中分散相的状态。使用扫描电子显微镜、低温氮吸附和从有限体积的溶液中静态吸附白蛋白的方法研究了所形成的生物聚合物膜的性质。使用Boyd、Morris–Weber和凝胶扩散模型，以及Lagergren伪一阶和Ho–McKay伪二阶动力学模型分析了吸附实验的数据。已经获得了用于证实在伤口愈合绷带上使用的生物聚合物基质的剂量以及用于在根据技术要求预设的时间内有效结合伤口坏死污染物的数据。

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引用次数: 0

Molecular Simulation of Water Structure in Narrow Slitlike Pores 窄缝状孔隙中水结构的分子模拟

IF 1.1 4区化学 Q3 Chemistry

Colloid Journal

Pub Date : 2023-10-04 DOI: 10.1134/S1061933X23600525

Yu. D. Fomin, E. N. Tsiok, S. A. Bobkov, V. N. Ryzhov

The structure of water in narrow slitlike pores has been studied by the methods of molecular dynamics simulation. Pores with interwall distances of 6.2–15.5 Å have been considered. Water structures resulting from spontaneous crystallization upon cooling to T = 300 K have been clarified on the basis of two- and three-dimensional order parameters. It has been shown that the observed structures can be described as sections of FCC or HCP crystals.

用分子动力学模拟方法研究了水在窄缝状孔隙中的结构。已经考虑到孔隙间距离为6.2–15.5Å。在二维和三维有序参数的基础上，阐明了冷却到T=300K时自发结晶产生的水结构。已经表明，观察到的结构可以描述为FCC或HCP晶体的截面。

引用次数: 0

Characterization of Superhydrophobic Coatings Based on PDMS and MQ Resin on Textured Surfaces 基于PDMS和MQ树脂的纹理表面超疏水涂层的表征

IF 1.1 4区化学 Q3 Chemistry

Colloid Journal

Pub Date : 2023-10-04 DOI: 10.1134/S1061933X23600483

N. Denman, A. M. Emel’yanenko, O. A. Serenko, L. B. Boinovich

The paper presents the results of studying coatings based on poly(dimethylsiloxane) rubber cross-linked with MQ resin at different contents of the latter. The PDMS : MQ resin ratios have been taken to be 2 : 1, 1 : 1, and 1 : 2. It has been shown that the application of a hydrophobic fluorinated-group-free composite with composition PDMS : MQ = 1 : 1 onto a pre-textured surface by spin-coating or deep-coating results in the formation of superhydrophobic coatings. The coatings are characterized by extremely large contact angles (170°) and rolling angles no larger than 4°. The analysis of variations in the contact angle, surface tension, and contact diameter and volume of a water droplet that has been in contact with a coating for a long time has indicated a high hydrolytic resistance of the obtained coatings.

本文介绍了以MQ树脂交联的聚二甲基硅氧烷橡胶为基体，在MQ树脂含量不同的情况下对涂料进行研究的结果。PDMS:MQ树脂的比例取为2∶1、1∶1和1∶2。已经表明，通过旋涂或深涂将组成为PDMS:MK=1∶1的疏水性氟化无基团复合物应用到预织构表面上导致形成超疏水涂层。涂层的特点是接触角非常大（170°），滚动角不大于4°。对与涂层长时间接触的水滴的接触角、表面张力、接触直径和体积的变化的分析表明，所获得的涂层具有高的耐水解性。

引用次数: 0

Functional Nanoparticles: Synthesis and Practical Applications 功能性纳米粒子的合成及其实际应用

IF 1.1 4区化学 Q3 Chemistry

Colloid Journal

Pub Date : 2023-10-04 DOI: 10.1134/S1061933X2360046X

B. N. Khlebtsov

A brief review of the current state of research in the field of synthesis, study of properties and practical application of functional nanoparticles is given. The main emphasis is on the work carried out by Russian scientific groups and published in the “Colloid Journal” in the last two years.

简要介绍了功能性纳米粒子的合成、性能研究及实际应用的研究现状。主要重点是俄罗斯科学团体在过去两年中开展的工作，并发表在《胶体杂志》上。

引用次数: 1

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