The automatic film coater MEMCAST™ is ideal for the synthesis of flat sheet polymeric membranes by coating a thin film of a polymer solution followed by the immersion of the films in a coagulation bath to obtain the final membrane via wet phase inversion. Reproducible film layers can be prepared, either self standing (e.g. coating directly onto glass, stainless steel, etc.) or on various substrates (e.g. nonwoven, polymeric supports, etc.).
The design minimises movement during film application in order to obtain smooth and consistent films. It is robust, durable, easy to clean and very user-friendly.
Dimensions (approx.) 780 x 490 x 320 mm
Weight (aprox) 29 kg (64 lb)
A wide range of single line and high throughput casting knives is available offering different coating thickness, ranging from 50 μm up to 1000 μm. The user can select the number of coating lines, comprised between 1 and 8.
POROLIQ™ 1000 series
The POROLIQ™ 1000 is a Liquid Liquid Porometer (LLP). This rapid, precise method employed by the POROLIQ™ 1000 allows for testing of pore size down to 2nm and, compared to other techniques, uses lower pressures for characterisation of traditional micro-, nano-porous materials.
HOW DOES THE POROLIQ™ 1000 WORK?
It is the first LLP equipment based on a pressure driven concept, which guarantees the maximum accuracy, especially when measuring pore sizes in the submicron range.
A measurement consists first of complete saturation of the porous membrane with a wetting liquid. The subsequent displacement of the wetting liquid from the pores is achieved by a second, immiscible liquid (displacement liquid). The pressure (P) required to expel the wetting liquid out of the pore depends on its diameter (D) as expressed by the Young-Laplace equation P=4*γ*cos θ/D , where γ is the interfacial tension betwen the wetting and displacement liquid. Typical interfacial tension values lie between 0.35 and 4 mN/m. This allows pores as small as 2 nm to be probed or, in comparison to traditional gas liquid porometry, for the use of more moderate pressures to test traditional submicron pore size ranges.
By measuring the flow rate of liquid thorugh the sample, a complete pore size distribution can be obtained.
THE MOST ACCURATE LLP ON THE MARKET
Automatic switch between the pressure sensors and the flow meters during a measurement The best sensor is automatically selected to optimise the accuracy and resolution in the full pressure and flow range
POROLUX™ 100/100NW/100FM and 500 - The Pressure Scan Series
The POROLUX™ 100/100NW/100FM and 500 are gas liquid porometers based on the pressure scan method developed for the rapid measurement of through-pores in materials such as filters, nonwovens, textiles, paper, membranes, hollow fibres, etc.
PRESSURE AND FLOW RATES RANGE
Starting from instruments that go up to 1.5 bar (22 psi), such as the POROLUX™ 100NW, up to 35 bar (500 psi), POROLUX™ 500. The maximum flow rate can be 100 or 200 l/min depending on the model and the application. For details please see the table of specifications for each model.
STANDARD SAMPLE HOLDERS
All POROLUX™ porometers come with a 25 mm sample holder. Other standard sample holders have a diameter of 13 or 47 mm.
POROMETER can create costumer specific designs for special samples: thick samples, large diameter samples, assembled filter-setups, etc. Please contact us for details and price.
UNIVERSAL SAMPLE HOLDER FOR 25 MM DIAMETER FOR THICKER SAMPLES
Universal sample holder for samples of thickness up to 10 mm.
Maximum pressure: 35 bar.
Also available for 13 mm diameter samples.
HOLLOW FIBRE AND TUBULAR SAMPLE HOLDER (SHHF)
The characterisation of the pore distribution of hollow fibres and tubes requires relatively high pressures and a limiting factor is often the burst pressure of the hollow fibre. Therefore, safety is often as concern.
We have developed a stainless steel sample holder in which one or more hollow fibres can easily be glued. With this sample holder very reproducible results can be obtained.
* This is the maximum pressure that the hollow sample holder can withstand. The maximum pressure allowed in each experiment will depend on the mechanical resistance of the hollow fibre.
IN-PLANE POROMETRY SAMPLE HOLDER
Special parts and accessories to carry out in-plane porometry measurements. Only available for 47 mm sample holders.