Core Technology

The AQFILM Organic Separation Membrane Materials R&D Center has assembled high-level R&D talents from multiple disciplines. Relying on global resources and technological accumulation, it has established a proprietary technical system dominated by TIPS thermally induced phase separation membrane technology and α-crystal form regulation technology. The core team is led by a global top-tier doctoral team and technical experts, who continue to focus on technological R&D and product applications of membrane materials and formulation chemicals.

Hollow Fiber Nanofiltration Preparation Technology

The hollow fiber nanofiltration membrane preparation technology developed by the Arkfim R&D team uses modified PES as the support layer and forms a nanofiltration skin layer on the membrane surface through crosslinking reactions. It achieves precise separation based on the principle of electrostatic repulsion between like charges. This technology features a stable structure, high flux, low operating pressure, and high recovery rate, with excellent rejection rates for divalent salts and organic matter removal. It effectively removes scale, heavy metals, organic compounds, and microorganisms, making it widely applicable in advanced municipal water treatment, direct softening and purification of drinking water, industrial water softening, and reverse osmosis pre-treatment. Compared with traditional spiral-wound nanofiltration processes, Arkfim's hollow fiber nanofiltration technology better meets the requirements for advanced treatment of high-quality drinking water.

"TIPS" Thermally Induced Phase Separation Method

The TIPS technology was first proposed by A.J. Castro in 1981. The process involves forming a homogeneous solution of polymer and high-boiling-point, low-volatility diluents, followed by cooling to induce phase separation, and then extracting the diluents to obtain microporous membranes. Through experimental screening of optimal liquid-liquid phase separation processes and diluents, our team has developed screw combinations and control programs to achieve crystal form regulation, enabling one-step extrusion molding of hollow fiber membranes. This technology is environmentally friendly, operates without organic solvents, and allows for recycling of diluents.

α-crystal form precise regulation technology

TIPS membrane-forming technology, through precise regulation of the α-crystal form, breaks through multiple performance indicators:High crystallinity enhances strength, acid-base resistance, and oxidation resistance;Controllable pore size meets diverse application requirements;High porosity avoids flux decay;High-speed spinning improves production efficiency;Stable process with minimal environmental impact;Suitable for a wide range of membrane materials, including hard-to-process polymers such as PVDF and ECTFE.

Hydrophilic modification technology

Hydrophilic modification technology is key to promoting the application of organic membrane materials. Although hydrophobic membranes exhibit excellent performance, their hydrophobicity limits their application in liquid filtration. Hydrophilic modification can improve anti-fouling properties, permeability, and stability, thus expanding membrane applications. The modification method combining physical and chemical approaches developed by the Arkfilm R&D team is simple and efficient, does not affect the intrinsic properties of membrane filaments, maintains long-term stability, and extends the application fields of organic membranes such as PTFE and ECTFE.

Filtration Targets

Nano

HFNF

Ultra

UF

Suspended solids and turbidity

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Bacteria

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Viruses, cryptosporidium

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Proteins, colloidal silica, and nanoplastics

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Color, humic acid, COD

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Microcontaminants, PFAS, divalent salts

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