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  • Release time: 2018 - 03 - 12
    Ultrathin AAO templates have self-organized honeycomb-like nanopores, and they are usually from several ten nanometers to several hundred nanometers in thickness.Ultrathin AAO templates have been widely used for fabrication of large-scale ordered arrays of surface nanostructures such as nanodots and nanoholes on the surface of substrates. Pores of ultrathin AAO template are uniform in diameter and highly ordered in a short-range. In addition, the material (Al2O3) is transparent in the near-infrared and visible spectrum, and is electrically insulated. Compared to other technology for making ord...
    Ultrathin AAO templates have self-organized honeycomb-like nanopores, and they are usually from several ten nanometers to several hundred nanometers in thickness.Ultrathin AAO templates have been widely used for fabrication of large-scale ordered arrays of surface nanostructures such as nanodots and nanoholes on the surface of substrates. Pores of ultrathin AAO template are uniform in diameter and highly ordered in a short-range. In addition, the material (Al2O3) is transparent in the near-infrared and visible spectrum, and is electrically insulated. Compared to other technology for making ord...
  • Release time: 2018 - 03 - 13
    A new type of AAO product (V-shape AAO) is developed by Topmembranes Technology. Compared to other anodic alumina membranes products, this profile of type of AAO is precisely tailored by the synergistic control of anodizing time, etching time and cyclic times, resulting in a unique structure for a wide range of applications.For more applications of V-shape AAO, please refer to: Adv. Mater. 2014, 26, 2805;ACS Nano, 2015, 9, 10287;Adv. Funct. Mater. 2017, 27, 1604720;Nanoscale Research Letters 2013, 8,268;J. Phys. Chem. C 2017, 121, 9757; Nano Energy, 2016, 22, 539; ACS Nano 2017, 11, 5113. ...
  • Release time: 2018 - 03 - 13
    AAO on Al substrate has honeycomb-like structure (shown in Fig. 1), composed with hexagon column of Al2O3, with a circular pore in the center. At the end of the pore, there is a half-sphere shape barrier layer oxide layer in contact with aluminum. The porous oxide film contains mutually parallel cylindrical pores extending from the barrier oxide layer to the film surface. AAO on Al substrate is the simplest product in AAO family, which can be fabricated into large area with a high success rate. Fig. 2 shows a typical picture of the AAO template.Fig. 1. Schematic of AAO on Al substrate.  F...
  • Release time: 2018 - 03 - 13
    Isotropic AAO templates, often referring to thicker AAO to be different from ultrathin AAO membrane, are widely used for a number of different fields. Topmembranes technology is specialized to make high quality isotropic AAO templates, with highly uniform and regular pore on both sides of the surfaces. The pores are arranged hexagonally within the single grains of the aluminum. The translucent nature of AAO is appealing to applications in biomedical field.Fig. 1. The structure diagram of isotropic AAO templates.Fig. 2. Typical SEM images of both sides of isotropic AAO template. Fig. 3. Ty...
  • Release time: 2018 - 03 - 13
    An sprayer, or airbrush, is an ideal tool for applying a thin layer of material on the substrate.We sell this for your convenience, the price of all set is less than $50. Depending on the amount of your purchase of other product, this airbrush can be free for your use.
Contact information

Telephone : +86 0755-2350 5289

Mail : service@topmembranes.com

Web : http://www.topmembranes.com

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Address : Tingwei Industrial Park, 6 Liufang Rd., Baoan District

Product Name

PVDF hollow fiber membrane

Date: 2018-12-27
Author: 20

The patented technology of preparing high performance hollow fiber ultrafiltration membrane is introduced. The hollow fiber ultrafiltration membrane produced by unique formulation and specific process has the characteristics of ultra-thin separation layer and typical spongy cross-section structure. It has higher tensile strength and elongation at break. At the same time, it has stronger hydrophilic retention performance and shows higher solution flux and stronger water treatment process. The technical advantages of pollution resistance and easy cleaning after pollution have essentially solved the problems of low strength and poor pollution resistance of existing hollow fiber ultrafiltration membranes. 


Main Technical Indicators 



Project

Size

Membrane Materials

PVDF

Standard Aperture(μm)

0.02

ID/OD(mm)

0.6/1.2

Pure Water Flux[L/(m2·h),0.1MPa]

200-250

Solution Flux[L/(m2·h),0.10MPa]

150~200

Normal Operating Pressure(MPa)

0.05~0.10

Maximum Operating Pressure(MPa)

0.30

Cleaning Cycle(min)

60~120

Chlorine Tolerance

Excellent

Solvent Resistance

Excellent

Acid and Alkali Resistance 

pH=2-13

Contact Angle

42.6°

Tensile Strength(MPa)

4.3

Technical characteristics


Low operating cost: Under the same operating conditions, high performance hollow fiber ultrafiltration membrane has lower transmembrane operating pressure, can maintain low pressure and high throughput for a long time, and the backwashing cycle can be extended by more than 50%. It has obvious advantages of water saving (saving backwashing water), medicine saving (saving chemical backwashing agents, reducing secondary pollution to the environment), energy saving (reducing power consumption of pumps).


Low pressure and high flux: Under the same transmembrane pressure, the solution flux of high performance hollow fiber ultrafiltration membrane increased by more than 30%. It has outstanding performance in the measurement of porosity, pore size, pore size distribution and standard pure water flux.


Good anti fouling ability: as the high performance hollow fiber ultrafiltration membrane has a strong hydrophilic group on the surface, the hydrophilicity of the hollow fiber ultrafiltration membrane has been greatly improved. Its contact angle is less than 43 degrees, which reduces the pollution caused by hydrophobic pollutants. The enhanced hydrophilicity of the membrane makes it difficult to contaminate the membrane for a long time, even if the gel layer is polluted. Cleaning can be applied to the treatment of highly polluted wastewater. as the high performance hollow fiber ultrafiltration membrane has a strong hydrophilic group on the surface, the hydrophilicity of the hollow fiber ultrafiltration membrane has been greatly improved. Its contact angle is less than 43 degrees, which reduces the pollution caused by hydrophobic pollutants. The enhanced hydrophilicity of the membrane makes it difficult to contaminate the membrane for a long time, even if the gel layer is polluted. Cleaning can be applied to the treatment of highly polluted wastewater.

PVDF hollow fiber membrane

PVDF hollow fiber membrane

Outer Surface

PVDF hollow fiber membrane

Cross-Section 

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