CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Qian Jiang,Yuling Xie,Lingqian Ji,Zhaoxiang Zhong,Weihong Xing
The fabrication of porous silicon carbide (SiC) ceramics prepared by existing reaction bonding technology requires high-temperature sintering beyond 1400 °C. We used low-cost industrial grade water glass and zirconia as sintering aids to prepare porous SiC ceramic filters to reduce the sintering temperature while improving the commerciality. Additionally, we investigated the effects of different sintering temperatures and the addition of water glass on the samples. Loading water glass and zirconia reduced the sintering temperature to 600 °C. The additive-loaded ceramic filter sintered at 600 °C exhibited an average pore size of 0.58 μm, a porosity of 47.4%, a bending strength reaching 56 MPa, a pure water permeance exceeding 4800 L m −2 h −1 bar −1 , and good acid corrosion resistance . In addition, the SiC filter prepared at 1000 °C showed good chemical resistance and an average pore size of 0.75 μm as well as mechanical strength and pure water permeance of over 80 MPa and 6294 L m −2 h −1 bar −1 , respectively. The low-cost, high-performance porous SiC ceramic filter exhibits broad commercial application prospects in water treatment.
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
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Xinxin Fu,Yufeng Li,Jian Ye,Mingwei Ge,Yu Zhang,Yahui Han,Hailin Yu,Jinjun Deng,Yunan He,Yanbin Tong,Hongsheng Liu
The development of fracturing fluids is pivotal for optimizing oilfield production, with polymer-based fracturing thickeners emerging as a principal focus of research owing to their superior rheological properties. In this investigation, polyacrylamide emulsions were synthesized through inverse emulsion polymerization, utilizing water glass and silane-modified water glass as the modifying agents. A comprehensive assessment of their performance was conducted. The findings demonstrated that polymer systems containing 0.2% sodium metasilicate and 0.03% silane-modified sodium metasilicate exhibited remarkable rheological behaviors. Specifically, the apparent viscosity increased by 25% and 40%, respectively, while shear recovery tests revealed enhancements in shear viscosity of 26% and 90% at low shear rates. Furthermore, at a proppant concentration of 20%, the proppant transport capacity of these two enhanced systems improved by 58.63% and 67.22%, respectively. This enhancement is likely attributable to the high bond energy of the silicon–oxygen (Si–O) bonds in water glass, which imparts greater structural stability to the polymer. The incorporation of silane-modified water glass further improves the dispersion and compatibility within the polymer matrix. The results offer a robust theoretical foundation for its use as a fracturing thickener.
研究领域:
石油工程
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Changyang Li,Peng Wang,Dun Zhang
Bioinspired superhydrophobic surfaces (SHS) have potential application prospects in many fields, but weak mechanical stability of the microstructures has become the main bottleneck. In this work, the water-glass strengthened the interfacial force between the inorganic SiO 2 and ZnO particles and the substrate through chemical reaction rather than physical embedding, which obtains a robust superhydrophobic surface. Based on surface characterization and analysis, the mechanism of the water-glass that played a role of enhancing the interface between the particles and the substrate in the coating was explored and proposed. Furthermore, the effect of the treatment temperature on the surface structure of the water-based paint during the spraying process was studied. Through simulating different environments, the anti-acid and -alkali resistance and anti-aging ability were tested in the full pH range or under strong UV irradiation , showing an excellent performance. Different mechanical stability tests confirmed that the silicate network structure enhances the binding force between the particles, improving the robustness of the superhydrophobic surface. This work may provide a new insight for the construction of superhydrophobic surfaces with enhanced interfaces.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2018
·
IF 3.789
Shuangjie Zhao,Juan Zhao,Min Wen,Ming Yao,Fengjue Wang,Fuzhi Huang,Qi Zhang,Yi-Bing Cheng,Jie Zhong
Now that there are various routes to prepare superhydrophobic surfaces for self-cleaning, anti-icing, liquid collecting, etc., attentions are moving toward low-cost upscaling of routes and increasing the reliability for actual applications. However, the required micro–nano structures for superhydrophobicity are light scattering and very vulnerable to abrasion. This intrinsically conflicts with the transparency and durability of superhydrophobic glass, which are the major barriers for its commercialization. In this study, we present a novel sequentially reinforced additive coating (SRAC) process to realize robust and transparent micro–nano structured film with tough intergranular sintering. A benign aqueous-based ink with poly(furfuryl alcohol) (PFA) and silica species is carefully designed and sprayed on glass to enable self-phase separation and morphology construction. The coatings reach the static contact angle (SCA) for water over 166° and withstand a 6H pencil scratching, the cross-cut test, and sand abrasion. Moreover, we also performed a 90 day outdoor performance test and the glass maintained superhydrophobicity with an SCA of 154°. These results provide a low-cost waterborne ink formula, and the high throughput and upscalable SRAC process could be a convenient technology for the fabrication of large area, robust superhydrophobic coatings.
研究领域:
材料科学
·
表面工程
✓ 已验证
DOI
PubMed
高影响因子
Journal of Building Engineering
·
2024
·
IF 6.7
Jiaqi Zhu,Chang Chen,Xufu Wang,Shaowu Jiu,Yanxin Chen,Yan Liu
Rock wool, as an external wall insulation material, is crucial in improving the energy efficiency of structures. However, a large amount of rock wool furnace slag (RWFS) generated during the production of rock wool panels manufacturing causes environmental problems. To address these issues, this study focuses on the use of waste RWFS as a precursor in alkali-activated cementitious materials. In addition, the effect of anatase nano-TiO 2 (ANT) and rutile nano-TiO 2 (RNT) as an additive to the alkali-activated rock wool furnace slag cementitious materials (AARWFSCMs) was evaluated and quantified. Scanning Electronic Microscope (SEM), Isothermal Conduction Calorimetry (ICC), Fourier-Transform Infrared Spectroscopy (FT-IR), X-ray diffraction (XRD) analysis were used to identify the effects of modulus 1.0–1.8 water glass modulus (Ms; SiO 2 /Na 2 O), 3%–7% Na 2 O content on AARWFSCMs. Experimental tests was conducted to quantify the properties such as the setting time, the fluidity, the compressive strength of AARWFSCMs after hardening. Results found that the optimal content of Ms, Na 2 O content in preparing AARWFSCM were 1.4, 5 % for obtaining 28-d compressive strength of 96.36 MPa. The atomic percentage of Ca/Si of the hydration products in the AARWFSCMs fluctuated within 0.94–1.50. The hydration products were a mixture of C–S–H and C–A–S–H. Moreover, the experimental results illustrated that the nano-TiO 2 , which highly beneficial in improving the compressive strength of AARWFSCMs. The additions of 0.50 % ANT and 0.75 % RNT resulted in increments of 5.9 % and 12.8 % in the 28-d compressive strength of AARWFSCMs, respectively. The obtained results provide a new method of utilization of RWFS and improving the sustainability of the construction industry.
研究领域:
建筑材料学
·
环境科学
✓ 已验证
DOI
高影响因子
SOLID STATE SCIENCES
·
2024
·
IF 3.4
Meng-Jie Chang,Xin Li,Jun Liu,Ge Bai,Qiu-Yu Hu
Water glass (WG)-based aerogels (WAGs) are challenged with requirement of acid catalyst and poor mechanical property. In this work, we have developed a novel formamide (FA) as catalyst for gelation of WG at alkaline condition to prepare WAG monolith under atmospheric pressure drying (APD). The FA serves both as the catalyst by hydrolyzing product formic acid and drying control agent. The effect of the gelation temperature, FA dosage, and WG concentration on the gelation time, density, shrinkage and microstructure of the aerogels were analyzed. The optimum WAG monolith shows a low shrinkage of 20 % and density of 0.165 g cm −3 , as well as large specific surface area of 229.4 m 2 g −1 and superhydrophobic surface. The connected nanoparticle into three-dimensional network endows the WAG monolith with good mechanical property. Due to the low-cost, easy fabrication process and free usage of acids, the method expands the synthesis of aerogel monolith.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2016
·
IF 3.997
Yuelei Pan,Song He,Lunlun Gong,Xudong Cheng,Congcong Li,Zhi Li,Zhong Liu,Heping Zhang
In this paper, hybrid silica aerogels were prepared by methltrimethoxysilane (MTMS) and water-glass co-precursor through two-step sol-gel process followed by freeze drying (FD). The characteristics of aerogels were strongly affected by the molar ratio of MTMS/Water-glass. When the molar ratio is 5.1, hybrid aerogel was obtained with good performances, such as low density (0.083 g/cm 3 ), high contact angle (155.1°) and low thermal conductivity (0.0226 W/m·K). The density, contact angle and thermal conductivity of aerogels based on co-precursor are still showing excellent thermal stability with the same performances after 550 °C heat-treatment.
研究领域:
材料科学
·
热能工程
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Cheng Liu,Xinyue Zhang,Yunfei Zheng,Zijie Ren,Weng Fu,Siyuan Yang
Fluorite is easily affected by the slime coating of fine barite during the froth flotation separation. In this work, the water glass (WG) was utilized as a dispersant to improve the flotation separation performance between fluorite and barite slimes. The single minerals flotation results revealed that barite slimes could be selectively depressed by gelatinized starch (GS), while WG had little effect on the floatability of barite and fluorite using sodium oleate (NaOl) as a collector. The flotation results of artificially mixed minerals showed that the separation efficiency of fluorite from barite was significantly reduced when barite existed as slimes. However, the presence of WG could eliminate the negative effect of barite slimes on the flotation fluorite by using the reagents scheme of GS/NaOl. Zeta potential results indicated that the fluorite surface charge turned from positive to negative with the addition of WG, then the barite slimes coating was detached from the fluorite surface because of the electrostatic repulsion, allowing the cleaning fluorite surface to once again interact with NaOl. The DLVO calculation was also conducted to reveal the agglomerate and disperse of different particles in the flotation system of fluorite-barite slimes.
研究领域:
矿物加工工程
·
浮选化学
·
胶体与界面科学
·
资源综合利用
·
无机非金属材料
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 34
·期 3
·2306085
·
IF 19
Yuxuan Zhu,Zimo Huang,Mengting Zheng,Hao Chen,Shangshu Qian,Chuang Sun,Yuhui Tian,Zhenzhen Wu,Chao Lai,Shanqing Zhang,Yu Lin Zhong
Zinc ion batteries (ZIBs) have recently attracted tremendous interest for being low-cost, environmentally benign, and high energy density. However, the large-scale practical application of ZIBs is hampered by well-known undesirable dendrite growth and serious side reactions of the Zn anode during the long-term cycling process. Herein, a multifunctional water-glass artificial protection layer with enormous Si─O functional groups is constructed on Zn anode through a simple spin-coating method. The theoretical and experimental investigation suggests that the as-constructed interface with rich Si─O hydrophilic functional groups on Zn anode could facilitate the even distribution of electric field distribution and homogeneous wettability, navigate uniform zinc deposition/stripping along the (002) plane, and subsequently lead to well-suppressed dendrite growth and effective prohibition of oxygen-involved corrosion. Consequently, the water glass-modified anode achieves highly reversible Zn plating/stripping over 1500 h at a high current density of 10 mA cm −2 in symmetrical cells, and a high capacity retention ratio of 79.4% at the current density of 5 A g −1 in full cells paired with V 2 O 5 cathode. This proposed water glass coating layer design is cheap, up-scalable, and facile, which could substantially accelerate the rapid commercialization of zinc anodes and unleash the full potential of renewable ZIBs for next-generation large-scale energy storage.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
International Journal of Low-Carbon Technologies
·
2023
·
IF 2.3
Yang Mengdi,Liu Guangyan,Zhao Wei,Meng Fanbin,Lao Youliang,Liang Yi
The balance of light transmittance, durability and self-cleaning performance of the coating film is the main reason that hinders the wide application of photocatalytic self-cleaning coating on building exterior glass. In this article, TiO2 powder was prepared with different concentrations of tetrabutyl titanate, hydrochloric acid and ethanol; and following with compounded polyvinyl alcohol (PVA) and waterborne polyurethane as adhesives; the mixed composite coating was loaded on the glass surface by spraying method to obtain superhydrophilic glass with self-cleaning properties. The physical and chemical properties of TiO2 composite films were characterized and tested by diffraction, scanning electron microscopy, optical contact angle measuring instrument and photocatalytic testing system. The results showed that the X-ray diffractometer analysis of the powder obtained with different alcohol-ester ratios showed that the crystal synthesis was successful, and the grain size conformed to the nanometer standard. TiO2 dispersion with a concentration of 0.08 g/L, after 30 min of irradiation with an ultraviolet (UV) lamp, the methyl orange added dropwise in the solution can be completely degraded. With the increase of TiO2 concentration, the photocatalytic efficiency increased rapidly, the contact angle decreased, when the TiO2 concentration reached 0.3% and 3% binder compounding, the surface of the composite coating film was still smooth at the nanometer level, the visible light transmittance was between 86.95 and 88.89%, and the contact angle was reduced from the initial 46.49 to 14.89° after 2 h of UV illumination. After 5 repeated degradation experiments and outdoor 180-d standing test, the composite coating film has recyclability and good durability. Therefore, TiO2 composite coating prepared by this method has a wide application prospect in the daily cleaning and subsequent maintenance of building glass.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2023
·
IF 3.5
Jun Liu,Zhi-Wei He,Ge Bai,Wen-Yao Zhu,Xin Li,Heng-Xue Xie,Hui Wang,Meng-Jie Chang,Jie Yang,Yu-Qing Wang,Zhen-Min Luo
We presented the fabrication of novel water glass-based monolithic aerogel reinforced with the electrospun SiO 2 nanofibers (SNFs) by one-step acid catalysis in alkaline condition under ambient pressure drying (APD). Compared with the powder-like water glass-based aerogel (WAG), integrated monolithic aerogel composited with nanofibers (FWAG) was successfully constructed featured with core/shell fibrous skeleton, low density, high porosity, hydrophobic surface and enhanced mechanical property. The obtained FWAG exhibits compressive elastic modulus of 0.13 MPa for FWAG-3 and a sorption capacity of 11.83 g −1 for CH 2 Cl 2 , as well as good insulator performance used at high temperature of ∼460 °C without obvious damage. The low density, hydrophobicity and excellent insulation property enable the FWAG to be applied as insulator for solar thermal evaporation with a water evaporation rate of 1.35 kg m −2 h −1 and conversion efficiency up to 88.4% at one solar intensity to produce fresh water.
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
Green Chemical Engineering
·
2020
·
IF 0
Xing Jiang,Jian Ren,Yong Kong,Zhiyang Zhao,Xiaodong Shen,Maohong Fan
The purpose of this study was to prepare a proof-of-concept CO 2 adsorbing material based on a new amine grafted silica aerogel microsphere (AGSAM) that could be used on both fixed and fluidized beds. A low-cost water glass and environment-friendly water were used as precursor and solvent of the silica aerogel, respectively. The silica aerogel microsphere (SAM) was prepared by dropping the siliceous solution into hot oil bath. The effect of the pH value of the siliceous solution, stirring speed and stirring paddle position on the sphericity and size of the SAM was investigated. The SAM with good sphericity was obtained when the pH value was 5.69–5.79. The mean diameter of the SAM decreased from 5 to 1 mm when the stirring speed increased from 1000 to 2000 rpm. The SAM with excellent sphericity was prepared when the paddle was placed on the top of the oil bath. When the paddle was placed at the middle and bottom of the oil bath, some liquid drops aggregated together and formed large aggregations. AGSAM was obtained by grafting the amine groups onto the framework of the silica gel microsphere. The CO 2 adsorption capacity of the AGSAM was 1.04 mmol g -1 with 1% CO 2 at 300 mL min -1 . The AGSAM with 4, 3.2, 2 and 1 mm in diameters had the fluidizing velocities of 0.531, 0.425, 0.265 and 0.159 m s -1 , respectively. The AGSAM with different sizes met different fluidizing conditions.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
危险品化学品经营许可证（带存储）