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Chu C, Tan F, Zhu X, Su L, Xu Z, Sun D. Temperature-Insensitive Nonpolar Suspensions of Polyoxyethylene Alkyl Ether-Grafted Silica Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:13207-13218. [PMID: 38867510 DOI: 10.1021/acs.langmuir.4c01270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2024]
Abstract
Nonpolar suspensions of organically modified particles exhibit a strong temperature sensitivity owing to the high-temperature-induced desorption/decomposition and the low-temperature-induced disorder/order conformational transition of the modifiers. This strong temperature sensitivity limits their applications, such as lubricants and oil-based drilling fluids, which require the suspensions to operate over a wide temperature range (e.g., 0-200 °C). We hypothesize that the introduction of a flexible ethylene oxide (EO) chain into the modifiers can disrupt the low-temperature-induced ordered conformation to improve the stability of the nonpolar suspensions. In this article, nonpolar suspensions with temperature insensitivity in the range of 5-160 °C were obtained via the covalent modification of silica NPs and the introduction of EO chains into the modifier molecules. Here, octadecyl-grafted silica NPs (C18-SiO2) and polyoxyethylene alkyl ether-grafted silica NPs (AEOn-SiO2) were synthesized and subsequently dispersed in mineral oil. The rheological properties of each suspension at different temperatures were evaluated, and the thermal stability of AEOn-SiO2 in mineral oil was investigated along with the conformational changes of the grafted chains. In the temperature range of 5-160 °C, the apparent viscosity and gel strength of the C18-SiO2 suspension changed dramatically, whereas the AEOn-SiO2 suspensions exhibited constant rheological properties over this temperature range. This temperature insensitivity of AEOn-SiO2 suspensions is attributed to the excellent thermal stability of AEOn-SiO2 in mineral oil and the disordered conformation of the EO chains upon cooling. This study provides a novel approach to preparing temperature-insensitive nonpolar suspensions, which have potential applications in the petroleum and lubricant industries.
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Affiliation(s)
- Cailing Chu
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan, Shandong 250100, P. R. China
| | - Fei Tan
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan, Shandong 250100, P. R. China
| | - Xiuyan Zhu
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan, Shandong 250100, P. R. China
| | - Long Su
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan, Shandong 250100, P. R. China
| | - Zhenghe Xu
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, P. R. China
| | - Dejun Sun
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan, Shandong 250100, P. R. China
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Zhang Y, Liu W, Zhou Q, Meng Y, Zhong Y, Xu J, Xiao C, Zhang G, Zhang Y. Effects of Vinyl Functionalized Silica Particles on Thermal and Mechanical Properties of Liquid Silicone Rubber Nanocomposites. Polymers (Basel) 2023; 15:polym15051224. [PMID: 36904465 PMCID: PMC10007495 DOI: 10.3390/polym15051224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 02/26/2023] [Accepted: 02/27/2023] [Indexed: 03/04/2023] Open
Abstract
It is very important to develop a new method of preparing high-performance liquid silicone rubber-reinforcing filler. Herein, the hydrophilic surface of silica (SiO2) particles was modified by a vinyl silazane coupling agent to prepare a new type of hydrophobic reinforcing filler. The structures and properties of modified SiO2 particles were confirmed using Fourier-transform infrared spectroscopy (FT-IR), X-ray photoelectron spectrometer (XPS), specific surface area and particle size distribution and thermogravimetric analysis (TGA), the results of which demonstrated that the aggregation of hydrophobic particles is greatly reduced. Additionally, the effects of the vinyl-modified SiO2 particle (f-SiO2) content on the dispersibility, rheology, and thermal and mechanical properties of liquid silicone rubber (SR) composites were studied for application toward high-performance SR matrix. The results showed that the f-SiO2/SR composites possessed low viscosity and higher thermal stability, conductivity, and mechanical strength than of SiO2/SR composites. We believe that this study will provide ideas for the preparation of high-performance liquid silicone rubber with low viscosity.
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Affiliation(s)
- Yulong Zhang
- China North Industry Advanced Technology Generalization Institute, Beijing 100089, China
| | - Wei Liu
- China North Industry Advanced Technology Generalization Institute, Beijing 100089, China
| | - Qiang Zhou
- Ordnance Science and Research Academy of China, Beijing 100089, China
- Correspondence: (Q.Z.); (Y.Z.)
| | - Yiting Meng
- National Special Superfine Powder Engineering Research Center of China, Nanjing University of Science and Technology, Nanjing 210014, China
| | - Ye Zhong
- China North Industry Advanced Technology Generalization Institute, Beijing 100089, China
| | - Jing Xu
- China North Industry Advanced Technology Generalization Institute, Beijing 100089, China
| | - Chuan Xiao
- Ordnance Science and Research Academy of China, Beijing 100089, China
| | - Guangpu Zhang
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Yanan Zhang
- National Special Superfine Powder Engineering Research Center of China, Nanjing University of Science and Technology, Nanjing 210014, China
- Correspondence: (Q.Z.); (Y.Z.)
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Wang J, Xing S, Xie J, Zhao S, Gan Y, Yang L, Wang TJ. Amination of silica nanoparticles using aminobutanol to increase surface reactivity. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129958] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Comparative Study of the Selective Sorption of Organic Dyes on Inorganic Materials—A Cost-Effective Method for Waste Treatment in Educational and Small Research Laboratories. SEPARATIONS 2022. [DOI: 10.3390/separations9060144] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Educational and research laboratories often produce relatively small amounts of highly diverse organic wastes. Treating waste can contribute significantly to the cost of running laboratories. This study introduced a simple and economical waste management system such that readily available used chromatography-grade inorganic materials, such as silica and alumina (basic and acidic), are utilized to treat remnant dye solutions and solution wastes from educational and small research laboratories. To recycle the adsorbents, they were heated to 600 °C, where the adsorbates were combusted. The results showed that acidic alumina is an effective adsorbent material for azo dyes and anionic dyes/stains, as well as textile dyes, with a 98 to 100% removal efficiency. Furthermore, alumina and silica possess excellent regeneration properties, where the dye removal efficiency of the materials was retained after regeneration at 600 °C. The adsorption properties of the materials were compared with those of aliginite and activated biomass from coffee grounds. Kinetic and thermodynamic studies of the sorption processes on the different materials were carried out. Overall, the inorganic materials used were efficient at removing contaminating remnant organic dyes stemming from educational and small research laboratories.
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Weng P, Tang Z, Huang J, Wu S, Guo B. Promoted dispersion of silica and interfacial strength in rubber/silica composites by grafting with oniums. J Appl Polym Sci 2019. [DOI: 10.1002/app.48243] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Peijin Weng
- Department of Polymer Materials and Engineering, State Key Laboratory of Pulp and Paper EngineeringSouth China University of Technology Guangzhou 510640 People's Republic of China
| | - Zhenghai Tang
- Department of Polymer Materials and Engineering, State Key Laboratory of Pulp and Paper EngineeringSouth China University of Technology Guangzhou 510640 People's Republic of China
| | - Jing Huang
- Department of Polymer Materials and Engineering, State Key Laboratory of Pulp and Paper EngineeringSouth China University of Technology Guangzhou 510640 People's Republic of China
| | - Siwu Wu
- Department of Polymer Materials and Engineering, State Key Laboratory of Pulp and Paper EngineeringSouth China University of Technology Guangzhou 510640 People's Republic of China
| | - Baochun Guo
- Department of Polymer Materials and Engineering, State Key Laboratory of Pulp and Paper EngineeringSouth China University of Technology Guangzhou 510640 People's Republic of China
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Gao W, Lu J, Song W, Hu J, Han B. Interfacial interaction modes construction of various functional SSBR–silica towards high filler dispersion and excellent composites performances. RSC Adv 2019; 9:18888-18897. [PMID: 35516869 PMCID: PMC9064989 DOI: 10.1039/c9ra02783a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Accepted: 05/27/2019] [Indexed: 02/01/2023] Open
Abstract
The impacts of the interfacial interaction modes and their strength on the filler dispersion and composites performances were clearly clarified.
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Affiliation(s)
- Wei Gao
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
| | - Jianmin Lu
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
| | - Wenna Song
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
| | - Jianfang Hu
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
| | - Bingyong Han
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
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Geng C, Zhang Q, Lei W, Yu F, Lu A. Simultaneously reduced viscosity and enhanced strength of liquid silicone rubber/silica composites by silica surface modification. J Appl Polym Sci 2017. [DOI: 10.1002/app.45544] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Chengzhen Geng
- Institute of Chemical Materials; China Academy of Engineering Physics; Mianyang 621900 China
| | - Qian Zhang
- Institute of Chemical Materials; China Academy of Engineering Physics; Mianyang 621900 China
| | - Weihua Lei
- Institute of Chemical Materials; China Academy of Engineering Physics; Mianyang 621900 China
| | - Fengmei Yu
- Institute of Chemical Materials; China Academy of Engineering Physics; Mianyang 621900 China
| | - Ai Lu
- Institute of Chemical Materials; China Academy of Engineering Physics; Mianyang 621900 China
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Liu D, Fang L, Cheng F. Bisurfactant-assisted preparation of amorphous silica from fly ash. ASIA-PAC J CHEM ENG 2016. [DOI: 10.1002/apj.2022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Dandan Liu
- State Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste Resources; Institute of Resources and Environmental Engineering, Shanxi University; Taiyuan 030006 China
| | - Li Fang
- State Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste Resources; Institute of Resources and Environmental Engineering, Shanxi University; Taiyuan 030006 China
| | - Fangqin Cheng
- State Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste Resources; Institute of Resources and Environmental Engineering, Shanxi University; Taiyuan 030006 China
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Surface modification of silica nanoparticles using phenyl trimethoxy silane and their dispersion stability in N-methyl-2-pyrrolidone. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.04.060] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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Kawamura A, Takai C, Fuji M, Shirai T. Effect of solvent polarity and adsorbed water on reaction between hexyltriethoxysilane and fumed silica. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.01.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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11
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Darmakkolla SR, Tran H, Gupta A, Rananavare SB. A method to derivatize surface silanol groups to Si-alkyl groups in carbon-doped silicon oxides. RSC Adv 2016. [DOI: 10.1039/c6ra20355h] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A carbon-doped silicon oxide (CDO) finds use as a material with a low dielectric constant (k) for copper interconnects in multilayered integrated circuits (ICs).
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Affiliation(s)
| | - Hoang Tran
- Department of Chemistry
- Portland State University
- USA
| | - Atul Gupta
- Department of Chemistry
- Portland State University
- USA
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Functionally modified monodisperse core–shell silica nanoparticles: Silane coupling agent as capping and size tuning agent. Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2012.06.047] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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13
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Electrophoretic deposition of composite chitosan–halloysite nanotube–hydroxyapatite films. Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2012.06.011] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Choi O, Kim BC, An JH, Min K, Kim YH, Um Y, Oh MK, Sang BI. A biosensor based on the self-entrapment of glucose oxidase within biomimetic silica nanoparticles induced by a fusion enzyme. Enzyme Microb Technol 2011; 49:441-5. [PMID: 22112615 DOI: 10.1016/j.enzmictec.2011.07.005] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2011] [Revised: 04/11/2011] [Accepted: 07/13/2011] [Indexed: 10/18/2022]
Abstract
We constructed a fusion protein (GOx-R5) consisting of R5 (a polypeptide component of silaffin) and glucose oxidase (GOx) that was expressed in Pichia pastoris. Silaffin proteins are responsible for the formation of a silica-based cell matrix of diatoms, and synthetic variants of the R5 protein can perform silicification in vitro[1]. GOx secreted by P. pastoris was self-immobilized (biosilicification) in a pH 5 citric buffer using 0.1M tetramethoxysilane as a silica source. This self-entrapment property of GOx-R5 was used to immobilize GOx on a graphite rod electrode. An electric cell designed as a biosensor was prepared to monitor the glucose concentrations. The electric cell consisted of an Ag/AgCl reference electrode, a platinum counter electrode, and a working electrode modified with poly(neutral red) (PNR)/GOx/Nafion. Glucose oxidase was immobilized by fused protein on poly(neutral red) and covered by Nafion to protect diffusion to the solution. The morphology of the resulting composite PNR/GOx/Nafion material was analyzed by scanning electron microscopy (SEM). This amperometric transducer was characterized electrochemically using cyclic voltammetry and amperometry in the presence of glucose. An image produced by scanning electron microscopy supported the formation of a PNR/GOx complex and the current was increased to 1.58 μA cm(-1) by adding 1mM glucose at an applied potential of -0.5 V. The current was detected by way of PNR-reduced hydrogen peroxide, a product of the glucose oxidation by GOx. The detection limit was 0.67mM (S/N=3). The biosensor containing the graphite rod/PNR/GOx/Nafion detected glucose at various concentrations in mixed samples, which contained interfering molecules. In this study, we report the first expression of R5 fused to glucose oxidase in eukaryotic cells and demonstrate an application of self-entrapped GOx to a glucose biosensor.
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Affiliation(s)
- Okkyoung Choi
- Clean Energy Center, Korea Institute of Science and Technology (KIST), Seongbuk-gu, Seoul 136-791, South Korea
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Liu Y, Guo Y, Zhu Y, An D, Gao W, Wang Z, Ma Y, Wang Z. A sustainable route for the preparation of activated carbon and silica from rice husk ash. JOURNAL OF HAZARDOUS MATERIALS 2011; 186:1314-1319. [PMID: 21194835 DOI: 10.1016/j.jhazmat.2010.12.007] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2010] [Revised: 12/02/2010] [Accepted: 12/02/2010] [Indexed: 05/30/2023]
Abstract
An environmentally friendly and economically effective process to produce silica and activated carbon form rice husk ask simultaneously has been developed in this study. An extraction yield of silica of 72-98% was obtained and the particle size was 40-50 nm. The microstructures of the as-obtained silica powders were characterized by X-ray diffraction (XRD) and infrared spectra (IR). The surface area, iodine number and capacitance value of activated carbon could achieve 570 m(2)/g, 1708 mg/g, 180 F/g, respectively. In the whole synthetic procedure, the wastewater and the carbon dioxide were collected and reutilized. The recovery rate of sodium carbonate was achieved 92.25%. The process is inexpensive, sustainable, environmentally friendly and suitable for large-scale production.
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Affiliation(s)
- Yan Liu
- College of Chemistry, Jilin University, Qianjin Street, 2699, Changchun 130012, China
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