Non-woven polymeric fabric including agglomerates of aluminum hydroxide nano-fibers for filtering water
The invention concerns the production of filter materials for the purification and disinfection of water, water solutions and other liquids, as well as for sterilizing filtration of injections and other solutions, for concentration of biomolecules in physiological liquids, concentration and extraction of viruses, preparation of apyrogenic water, in biocatalytic diaphragm reactors. The invention solves the problems of a new filter material production, characterized by high sorption properties, high retention efficiency of submicron electronegative particles, microorganisms, submicron non-polar particles and chemical contaminations, and, at the same time, characterized by low hydrodynamic resistance. A base of filter material is the nonwoven organic synthetic polymeric fabric, modified by the aluminum hydroxide particles, fixed to the surface of base fibers for improvement of its sorption properties and for making it positively charged. A method of filter material production comprises: applying the modifying composition onto the fibrous base in the form of organic nonwoven synthetic polymeric fabric, wherein said modifying composition comprises the particles of the aluminum-based material, hydrolysis thereof results to formation and fixation of the aluminum hydroxide particles to the base fibers. A method of fluid filtration is carried out using the filter material as a non-woven organic synthetic polymeric fabric, to the fibers of which the aluminum hydroxide particles are fixed.
1. A filtering material comprising:
a non-woven organic synthetic polymer fabric as a base; and
positively charged agglomerates of aluminum hydroxide nano-fibers;
wherein the non-woven organic synthetic polymer fabric is formed of negatively charged fibers produced by an electrospinning method, wherein said negatively charged fibers have a diameter of 1.0 to 3.0 um; and
wherein the positively charged agglomerates of aluminum hydroxide nano-fibers are fixed to the negatively charged fibers of the non-woven organic synthetic polymer fibrous fabric by electrostatic adhesion forces, and
wherein the agglomerates of aluminum hydroxide nano-fibers have dimensions in a range of 0.2 to 5.0 um with specific surface area in a range of 100 to 250 m 2 /g and pore volume in a range of 50 to 95%.
2. The material of claim 1 , wherein the amount of agglomerates of aluminum hydroxide nano-fibers is in a range of 15 to 45 mass. % of the filtering material.
3. The material of claim 1 , wherein said agglomerates of the aluminum hydroxide nano-fibers are fixed to the fibers of the nonwoven organic synthetic polymer fibrous fabric both on an exterior surface of the fabric and on an inside of the fabric.