hydrophilic fumed silica

Defoamers are currently a widely used additive, playing a significant role in various fields such as food, petrochemicals, papermaking, and industrial cleaning. Among them, silicone defoamers are the most extensively used and consumed defoamer products. Other types of defoamers, such as mineral oil and polyether, complement the applications of silicone-based defoamers. The main components of silicone defoamers include silicone paste, emulsifiers, and thickeners, with silicone paste being the active ingredient in silicone defoamers. Silicone paste is primarily composed of silicone oil (or mineral oil, vegetable oil, etc.) and silica. As an essential component of defoamers, silica plays a crucial role. Taking a defoamer with dimethyl silicone oil as the silicone paste base as an example, due to the poor dispersibility and low solubility of dimethyl silicone oil in emulsion systems, it is necessary to use silica (white carbon black) or various emulsifiers to improve its dispersion. The silanol groups in white carbon black can form hydrogen bonds with water, increasing the viscosity of the system, achieving a thickening effect, and promoting the dispersion and stability of the defoamer. Due to the small particle size, large specific surface area, and high surface energy of white carbon black, it can generate a significant force to adsorb bubbles. Together with silicone oil, it forms a force that attacks bubbles, creating weak points. Under the low surface tension of silicone oil, the bubbles rupture, leading to defoaming. This is the general principle of how defoamers work. In summary, white carbon black primarily serves to thicken, disperse, and adsorb bubbles in defoamers. Hydrophilic white carbon black has poor compatibility with silicone oil, whereas hydrophobic white carbon black, after surface modification, can be well wetted and dispersed in silicone oil systems due to its hydrophobicity. The preparation method of defoamers mainly involves two steps. The first step is the preparation of silicone paste, which involves the dispersion and reaction of white carbon black in silicone oil. The second step involves adding emulsifiers, thickeners, and other additives to emulsify and disperse the silicone paste into an emulsion, which can then be diluted as needed to prepare defoamers of different concentrations. White carbon black can be divided into two types based on production processes: precipitated white carbon black and fumed white carbon black. The advantage of precipitated white carbon black lies in its low cost, but due to its larger particle size, it is prone to sedimentation, which can lead to clogging of filters in many defoamer applications. In contrast, fumed white carbon black has smaller particle size, better suspension properties, good compatibility with emulsifiers, requires less additive amount, and has excellent thickening and anti-sedimentation properties. Additionally, fumed white carbon black that has undergone hydrophobic modification inherently possesses certain defoaming properties, making it an ideal solution to the problems faced by precipitated white carbon black in defoamer applications. As the price of fumed white carbon black decreases, its cost-effectiveness in defoamers will become even more prominent, making it an excellent choice for defoamers. In this context, GESEESIL 200, a hydrophilic silica product from Gesee New Materials, stands out as a high-quality option for defoamer formulations. For more information, visit www.geseesiltech.com

In today's rapidly developing field of materials science, fumed silica (fumed silica), as a high-performance nanomaterial, is gradually becoming a ‘star product’ in the rubber, coatings, electronics, pharmaceutical and other industries. Advantages of Fumed Silicon Dioxide Products of Gesee 1.Excellent dispersibility   Through the unique surface treatment technology, Gesee's fumed silica shows excellent dispersibility in all kinds of substrates, which can effectively improve the mechanical properties and stability of composite materials. 2.High purity The purity of the product is up to 99.9% and the specific surface area is up to 200-400 m²/g. This high purity and high specific surface area makes it excellent in rubber reinforcing, coating thickening and electronic material filling. 3.Customised Solutions In response to the needs of different industries, Gesee New Materials provides customised fumed silica products, including different particle sizes and functionalised products, to meet the diverse needs of customers. Application areas of fumed silica 1. Rubber industry As a reinforcing agent in rubber products, fumed silica can significantly improve the abrasion resistance, tear resistance and mechanical strength of rubber, which is widely used in tyres, seals, hoses and other products. 2. Coatings and Inks   Fumed silica is used as thickener and anti-settling agent in coatings and printing ink, which can improve the rheological properties and stability of the products, and at the same time enhance the weather resistance and gloss of the coating. 3. Electronic materials In the field of electronic packaging materials and semiconductors, fumed silica is used as a filler, which can effectively improve the insulating property, thermal conductivity and mechanical strength of the materials, and meet the needs of high-performance electronic components. 4. Medicine and food   Fumed silica is used as a drug carrier in pharmaceuticals to improve the solubility and bioavailability of drugs; in the food industry, it is widely used in the production of powdered food as an anti-caking agent and flow aid.   Zhengzhou Gesee new materials always take technological innovation as the core and customer demand as the guidance, and is committed to providing high-performance, green and environmentally friendly fumed silica products for customers around the world.

In recent years, stringent environmental regulations and the growing demand for cleaner fuels have made oxidative desulfurization (ODS) a key research focus due to its high efficiency and low energy consumption. Fumed silica, a high-performance nanomaterial with unique physicochemical properties, has shown great potential as a catalyst support and adsorbent in ODS. This article explores the application of fumed silica in desulfurization, along with recent advancements and future trends. 1. Recent Developments in Fumed Silica Technology   Fumed silica is produced via high-temperature hydrolysis of silicon tetrachloride (SiCl₄), resulting in nanoscale amorphous silica with high surface area (100-400 m²/g), low bulk density, excellent chemical stability, and tunable surface properties. Recent progress in nanotechnology has expanded its applications in catalysis, composites, energy storage, and environmental remediation. Improved Surface Modification: Silane coupling agents and metal oxide coatings enhance hydroxyl group density, improving interaction with catalytic active sites.  Enhanced Dispersion: Advanced synthesis methods (e.g., plasma-assisted processes) optimize dispersibility, making fumed silica more stable in liquid-phase catalytic systems.   Greener Production: Some manufacturers are adopting low-carbon synthesis methods to reduce environmental impact and costs.,      2. Applications of Fumed Silica in Oxidative Desulfurization ODS converts sulfur compounds (e.g., thiophene, benzothiophene) in fuels into sulfones/sulfoxides under mild conditions, followed by extraction/adsorption. Fumed silica contributes in the following ways:   Catalyst Support   Its high surface area and abundant silanol (Si-OH) groups make it ideal for anchoring metal oxides (e.g., TiO₂, MoO₃, WO₃) and heteropolyacids (e.g., phosphomolybdic acid): TiO₂/SiO₂ composites: TiO₂ supported on fumed silica exhibits enhanced photocatalytic ODS efficiency due to improved charge separation and active site exposure.   Heteropolyacid-silica hybrids: Immobilizing phosphotungstic acid (HPW) on modified fumed silica improves catalyst stability and reusability while minimizing leaching.   Adsorbent Enhancement   Post-oxidation, sulfones must be removed via adsorption/extraction. Fumed silica’s porosity and modifiable surface enable: Functionalized molecular sieves/activated carbon for selective sulfur adsorption. Ionic liquid composites for integrated extraction-adsorption systems.   Oxidant Stabilization   In H₂O₂/O₃-based ODS, fumed silica acts as a stabilizer, preventing rapid oxidant decomposition and prolonging reactivity. 3.Future Perspectives Advanced Catalyst Design: Precise control of surface chemistry to optimize metal/heteropolyacid loading for higher activity and durability. Integration with Green Processes: Combining photocatalysis, electrocatalysis, or biocatalysis with fumed silica-based systems for energy-efficient desulfurization. Scale-up Challenges: While lab-scale results are promising, industrial adoption requires cost-effective production and long-term stability. 4. Conclusion   Fumed silica’s tunable properties position it as a versatile material for next-generation ODS technologies. Continued research on nanoengineering and catalytic mechanisms will drive the development of efficient, sustainable desulfurization solutions, supporting global clean energy goals.        

Say goodbye to reliance on imports! GESEESIL 200: A high-performance gas-phase silica substitute made in China, with a specific surface area of 200 comparable to AEROSIL 200! Dear friends in the materials industry, hello! In the field of high-performance materials, fumed silica (Fumed Silica) plays an indispensable role due to its unique properties such as thickening, thixotropic, anti-settling, and reinforcing effects. When it comes to benchmarks in this field, many people immediately think of Evonik's AEROSIL® 200 — this classic product with a specific surface area of 200 m²/g has long dominated the market thanks to its outstanding performance and stability.   However, the high prices of imported brands, potential supply chain risks, and the growing demand for domestic alternatives have led more and more users to seek reliable alternatives with comparable performance and better cost-effectiveness. Today, we will delve into a highly anticipated domestic newcomer—GESEESIL 200 pyrogenic silica from GESEE New Materials Co., Ltd.—to see if it can truly take on the role of a viable alternative to AEROSIL 200! Say goodbye to import dependency! GESEESIL 200: The domestic pioneer of high-performance vapor-phase silica, with a specific surface area of 200 matching AEROSIL 200! Why 200 m²/g?   One of the core performance indicators of fumed silica is specific surface area (SSA). A higher specific surface area indicates finer particles and more active surface sites, typically resulting in more pronounced thickening, thixotropic, and reinforcing effects. The value of 200 m²/g is a significant threshold: Balanced performance: It provides significant thickening and thixotropic effects without excessively increasing system viscosity or causing processing difficulties, making it highly versatile. Mature application: It serves as a foundational reference point for numerous established formulations (particularly in silicone rubber, coatings, inks, adhesives, sealants, cosmetics, pharmaceuticals, and other fields). Industry benchmark: The success of AEROSIL 200 has established it as the de facto industry standard, with many formulation developments using it as a reference. Therefore, a domestically produced fumed silica that consistently achieves a specific surface area of 200 m²/g holds undeniable strategic significance and market potential. Domestic breakthrough! GESEE 200: A high-performance, cost-effective “Made in China” solution in the fumed silica sector, and a strong alternative to AEROSIL 200! GESEE SIL 200: Precise Benchmarking, Domestic Powerhouse   GESEE has been continuously investing in R&D in the field of pyrogenic silica. Its newly launched GESEE SIL 200 product is explicitly targeted at benchmarking against AEROSIL 200. TECHNICAL DATA  PROPERTY GESEESIL 200 AEROSIL 200 NOTES Specific Surface Area 200 ± 30m²/g  200 ± 25 m²/g  Core metrics aligned! Ensures comparable baseline performance. Silica Content   ≥ 99.8% ≥ 99.8% High purity with low impurity content. Loss on drying (105°C)    ≤ 3.0%   ≤ 1.5% (2 hours)  Good control of moisture content. pH value 3.7–4.5  3.7–4.5   Surface chemical properties (acidity) are similar.   Core advantages of the alternative: cost-effectiveness and supply security Performance benchmarking is the foundation, but GESEESIL 200’s core competitiveness as an alternative lies in: Significant price advantage: This is the most direct and appealing aspect of domestic substitution. While ensuring comparable performance, GESEESIL 200 typically offers a more competitive price, helping businesses effectively reduce raw material costs and enhance product market competitiveness. Stable and reliable domestic supply: GESEE possesses advanced production facilities and a comprehensive quality control system domestically, ensuring stable and timely localized supply. This reduces reliance on imported supply chains, mitigates potential logistics and geopolitical risks, and typically results in shorter delivery cycles. Localized technical support and services: GESEE's technical support team is closely aligned with the domestic market and users, providing faster response times and solutions tailored to local needs.   Does “equivalent” mean exactly the same? We need to view the term “equivalent” objectively. Performance: In terms of core physical and chemical properties and application performance, GESEESIL 200 has already performed exceptionally well, capable of meeting the requirements of most formulations that previously used AEROSIL 200. Direct replacement testing is feasible in most cases and yields good results. Minor differences: Minor differences in production processes among different manufacturers may result in slight variations in product dispersion, oil absorption value, surface hydroxyl distribution, and batch consistency. These differences may require minor adjustments in certain extremely demanding application scenarios or formulations that are highly sensitive to process conditions.   Brand recognition and historical legacy: AEROSIL has a strong brand influence and a long history of accumulated application data. GESEE, as a strong challenger, is rapidly building its own reputation and database. How to evaluate GESEESIL 200? If you are currently using AEROSIL 200 and seeking to reduce costs or secure your supply chain, we strongly recommend conducting small-scale or pilot-scale validation tests: Contact GESEE: Request GESEE 200 samples and detailed technical documentation. Parallel testing: Replace AEROSIL 200 with an equal amount of GESEESIL 200 in your existing formulation and conduct comprehensive performance testing (rheology, mechanical properties, storage stability, processing performance, etc.).   Evaluation results: Compare test data and application performance. Most users report a smooth replacement process with performance meeting requirements.   Cost calculation: Calculate the cost savings achieved through the replacement.