Premium environmental agents engineered for global industrial specifications
Analyzing the chemistry, mechanics, and global demand trends of high-performance foam control agents
In modern industrial processing, foam generation presents a persistent thermodynamic challenge that threatens system efficiency, volumetric capacity, and product quality. From large-scale municipal wastewater plants to biological reactors, petrochemical refineries, textile dye houses, and mineral enrichment mills, the sudden expansion of micro-bubbles can cause severe overflow, equipment damage, and environmental non-compliance. Addressing these challenges requires highly specialized defoamers that can suppress, collapse, and prevent foam formation under intense mechanical shear and wide thermal and chemical variances.
Among various chemical alternatives, silicone-based defoamers have emerged as the gold standard for performance. Utilizing polyorganosiloxanes (primarily polydimethylsiloxane, or PDMS) as their core active substance, combined with finely dispersed hydrophobic silica particles, these formulations act by destabilizing the surfactant films that encapsulate air. The extremely low surface tension of silicone oils—typically between 20 to 22 mN/m—enables rapid spreading across the liquid-air interface, where the hydrophobic silica particles pierce the bubble lamellae, triggering spontaneous collapse.
The global demand for these specialized agents continues to expand rapidly. According to market analysts, the transition to high-throughput manufacturing processes, stringent environmental limits on chemical carryover, and the increasing complexity of industrial wastewater require highly customizable foam control formulations. As a major ODM silicone-based defoamer exporter, Smedic Technology is uniquely positioned to deliver customized solutions tailored to these challenges. By formulating custom active concentrations, adjusting emulsion viscosities, and optimizing pH compatibility, we help global buyers improve productivity and lower operational costs.
Smedic Technology Co., Ltd. was established in 2011 as a comprehensive solution provider specialized in environmental protection agents, integrating R&D, production, sales, and engineering-related technical services. We are dedicated to providing customers with customized chemical products, technical solutions, and services. Smedic produces environmental protection agents covering multiple sectors such as municipal sewage, industrial wastewater, and tap water treatment, as well as mineral processing agents, and oilfield chemicals. We offer more than 80 different environmental protection products, with an annual production capacity exceeding 1 million tons.
By leveraging our deep understanding of surfactant behavior, chemical kinetics, and process engineering, Smedic has grown from a regional supplier to a globally recognized exporter of customized environmental agents, serving clients across diverse geographical landscapes and regulatory systems.
Company Established & R&D Initiated
Types of Advanced Environmental Agents
Annual Production Capacity (Tons)
A molecular look at how polyorganosiloxanes master the liquid-air interface
Polydimethylsiloxane (PDMS) molecules feature an inorganic backbone of alternating silicon and oxygen atoms, which provides exceptional flexibility. The outer methyl groups create an extremely low surface energy barrier, allowing the defoamer droplet to spread rapidly over surfactant-stabilized aqueous films.
Pure silicone fluid has defoaming properties, but the addition of highly dispersed, fumed, or precipitated silica dramatically enhances performance. These hydrophobic particles migrate to the interface, creating focal stress points that rupture the liquid film under minimal kinetic force.
For aqueous systems, silicone active ingredients must be formulated as stable emulsions. Utilizing non-ionic emulsifiers, our ODM facility maintains precise particle size distributions (typically 10 to 50 microns) to prevent phase separation and oil spots on finished products.
Silicone-based defoamers function through two distinct mechanisms: defoaming (knocking down existing foam) and antifoaming (preventing new foam from forming over time). When introduced to a foaming medium, the defoamer droplets must possess controlled insolubility. If the droplet is too soluble, it dissolves into the surfactant micelles and loses its activity. If it is too insoluble, it cannot disperse effectively, leading to localized oil spots and reduced performance.
Our ODM silicone defoamer range achieves an optimized balance of insolubility and dispersibility. Through precise formulation design, Smedic's laboratory controls the molecular weight distribution of the silicone polymers. Higher molecular weight polymers improve durability in aggressive media, while lower molecular weights facilitate rapid foam knock-down. This customization ensures optimal performance, whether for high-temperature pulp manufacturing or bio-aeration processes with high microbial concentrations.
Our comprehensive supply chain infrastructure and national production footprint
Our corporate headquarters is located in Beijing, we have multiple wholly-owned production bases in Hebei, Guizhou, Shanxi, and other regions, and have set up more than ten OEM partner factories and regional warehousing and logistics bases in Shandong, Shanxi, Anhui, Guangxi, and Sichuan provinces, among others. Our business and service network covers over 20 provinces across China. Our projects involve more than 600 urban sewage treatment plants and over 1,000 end customers in industrial wastewater treatment, mineral processing, and oilfield chemicals. The total sewage treatment capacity involved in the projects exceeds 20 million tons per day. We are a leading company in the Chinese market within the high-end segment of environmental protection chemicals for municipal and industrial wastewater treatment.
Provinces Covered by Our Logistics Network
Urban Sewage Treatment Plants Served
Industrial & Mineral End Customers
Tons of Sewage Treated Daily (Domestic Total)
How Smedic's silicone defoamers perform across key industrial environments
Designed to withstand high chemical alkalinity (pH 12–14) and elevated temperatures (up to 95°C) during washing and screening processes. Prevents pump cavitation and improves drainage rates.
Formulated to resolve bio-foaming caused by filamentous bacteria in aeration basins without affecting biological activity, dissolved oxygen levels, or the health of activated sludge.
Maintains foam control under high shear forces, high temperatures, and high salinity in oilfield operations. Ensures smooth gas-oil separation and stable mud density during deep drilling.
We have obtained qualifications such as National High-tech Enterprise, National Specialized, Refined, Unique and Innovative "Little Giant" Enterprise, National Key-Supported Specialized, Refined, Unique and Innovative "Little Giant" Enterprise, Hebei Province Specialized, Refined, Unique and Innovative "Little Giant" Demonstration Enterprise, Hebei Province Green Factory, Hebei Province Science and Technology-based Small and Medium-sized Enterprise, and China's Science and Technology-based Innovative Small and Medium-sized Enterprise.
We have a core technical team composed of academicians, experts, professors, and senior engineers, and have established an R&D system and a technology commercialization platform centered around one academy, three research institutes, and five bases. We have established the Hebei Provincial Enterprise Technology Center, the Hebei Provincial Advanced Water Treatment Chemicals Technology Innovation Center, and the Cangzhou Water Treatment Engineering Technology Research Center, and have been recognized as a Class A R&D institution in Hebei Province. We have established an expert workstation with Tsinghua University Association of Senior Scientists and Technicians, and have set up joint R&D laboratories with Shandong University and Beijing University of Technology. Additionally, we also serve as a commercialization partner for the industry-academia-research achievements of institutions such as Peking University and Tianjin University.
Unlocking supply chain resilience, advanced formulation, and global logistics capability
Sourcing silicone-based defoamers from Smedic offers distinct structural advantages for global buyers. Operating in China's robust industrial chemical ecosystem, our factories benefit from a complete raw material supply chain. We source high-purity siloxanes directly from local upstream producers, shielding our clients from the cost volatility common in other regions. This raw material security, combined with our 1 million-ton annual capacity, ensures cost efficiency and stable lead times even during high market demand.
Our ODM model offers significant flexibility. Standard defoamers may not perform consistently across all industrial setups due to variations in water chemistry, temperature, and surfactant levels. Smedic's R&D team addresses this by developing custom chemical formulations:
Stable formulations tailored for extremely acidic pickling baths or alkaline pulp liquors.
High-temperature resistance engineered for petrochemical and textile dyeing operations.
Customizable active solids concentration, allowing buyers to optimize dilutability and shipping costs.
Environmentally friendly formulations developed to comply with strict international discharge limits.
Proven technologies certified by national and international authorities
The patented technologies and products we have independently developed, such as the bio-enhanced denitrification carbon source and the deep multi-nuclear phosphorus removal agent, have passed the scientific and technological achievement evaluation conducted by the Science and Technology Department of Hebei Province. These achievements have been appraised as “internationally advanced” and have filled a domestic gap in this product category.
Our “Active Oxygen Compound Disinfectant” has been recognized as a National Construction Industry Scientific and Technological Achievement Promotion Project by the Science and Technology Development Promotion Center of the Ministry of Housing and Urban-Rural Development. Our independently developed “Inorganic-Organic Covalent Bond Flocculant and Its Advanced Water Purification Technology” has won multiple awards, including the 22nd China Patent Award, the First Prize for Technological Invention from the China Petrochemical Industry Association, the Hebei Province Science and Technology Progress Award, and recognition as a Belt and Road SME Recommended Project.
We have been recognized as the “Leading Brand of Advanced Wastewater Treatment Chemicals” and the “Most Valuable Water Treatment Chemicals Brand” by China Water Network and the E20 Environmental Platform for four consecutive years. We have established long-term strategic partnerships with dozens of major water groups, including Shouchuang Ecological and Environmental Group, Yangtze River Ecological and Environmental Group, Beijing Enterprises Water Group, OriginWater, and China Water Environment Group, and have been included in their centralized procurement supplier lists. We have been granted over sixty Chinese patents, including more than forty invention patents and over twenty utility model patents. We have led the drafting of more than ten national and industry standards, including those for composite carbon sources, composite coagulants, sodium acetate, and nitrifying and denitrifying bacterial agents.
Why chemical procurers and municipal operators choose Smedic globally
We have established multiple proprietary eco-friendly chemical production facilities in Hebei, Guizhou, and Shaanxi provinces, as well as over a dozen joint venture factories nationwide, ensuring geographic proximity and stable supply.
We boast comprehensive inspection protocols that encompass raw material acceptance testing, in-process quality control, and final product release inspection, meeting international quality criteria.
We have a core technical team consisting of academicians, experts, professors, and senior engineers, along with a sophisticated R&D department focused on interface and emulsion chemistry.
Our offerings include products, services, technical solution packages, contract manufacturing, and customized products and service solutions tailored to client specifications.
We focus on environmental protection agents covering multiple sectors such as municipal sewage treatment, industrial wastewater treatment, tap water treatment, mineral processing agents, and oilfield chemicals. Over the years, we have achieved milestones that establish our credibility as a high-tech manufacturer.
Smedic was founded, specializing in advanced environmental protection chemicals.
The company established a complete product portfolio for municipal wastewater treatment chemicals.
It was recognized as a key national high-tech enterprise, establishing rigorous laboratory structures.
A production base for water treatment chemicals in Guiyang was established to support south-western regional needs.
The production bases in Hebei, Shandong, and Guizhou were completed and expanded, with total capacity exceeding 1 million tons.
Recognized as a National Specialized, Refined, Unique and Innovative Small and Medium-sized Enterprise.
Established a provincial-level R&D platform in Hebei to target next-generation polymer structures.
Recognized as a National Intellectual Property Advantage Enterprise with over 60 patents.
Established a joint venture with the Chengdu Institute of Mineral Comprehensive Utilization, China Geological Survey to produce mineral processing reagents.
Original compliance validation records
Technical guidance for chemical engineers, distributors, and procurement managers
Silicone-based defoamers feature a polydimethylsiloxane (PDMS) backbone, offering lower surface tension (~21 mN/m) and high performance at low concentrations. This makes them ideal for rapid foam knock-down across a wide range of temperatures. Polyether defoamers, while having higher surface tension, perform well in high-shear systems and biological treatment systems where silicone carryover could cause filtration fouling, such as in ultrafiltration membranes.
Dosage depends on foam volume, surfactant concentration, and temperature. We recommend starting with a laboratory jar test using dosages of 50 to 200 ppm (parts per million). The dynamic foam test determines knock-down and suppression times, helping identify the minimum dosage needed to prevent oil spotting while maintaining foam control.
Yes, our ODM formulations incorporate specialized non-ionic surfactant stabilizers to prevent phase separation. Under standard conditions (5–35°C), the emulsions remain stable for 6 to 12 months. We advise against exposure to freezing temperatures or direct sunlight, which can destabilize the emulsion droplets.
We provide customization across several parameters: active solid content (10% to 60%), viscosity (500 to 5000 mPa·s), ionic charge, chemical compatibility, and packaging configurations, including 25kg drums, 200kg barrels, or 1000kg IBC totes.
Excessive use of low-grade silicone defoamers can cause membrane fouling. To prevent this, Smedic designs self-dispersing, low-carryover silicone-polyether copolymers. These structures control droplet size, allowing the agent to break foam at the surface and wash out cleanly without adhering to membrane surfaces.
Expanding process safety and environmental compliance with certified products
Smedic Tech
