Biobased membrane
AssigneeTechnische Universiteit Delft
InventorsEduardus Aloysius Bernardus Koenders, Jure Zlopasa, Stephen James Picken
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Abstract
A composition for forming a bio-compatible membrane applicable to building material, such as concrete, cement, etc., to a method of applying said composition for forming a biocompatible membrane, a biocompatible membrane, use of said membrane for various purposes, and to building material comprising said membrane.
Claims9
Method of forming a bio-compatible impermeable membrane comprising the steps of:
- providing a composition consisting essentially of (i) water, (ii) a water-soluble anionic bio-degradable polymer obtained from bacteria, and (iii) platelet nanoparticles,
- wherein the water-soluble anionic bio-degradable polymer is in an amount of 1.5-10 wt %,
- wherein platelet nanoparticles are in an amount of 0.01-5 wt %, based on a total weight of the composition,
- wherein an amount (wt %) of water-soluble anionic bio-degradable polymer is larger than an amount of platelet nanoparticles,
- wherein an amount of platelet nanoparticles and water-soluble anionic bio-degradable polymer is 1.51-10 wt. %,
- applying the composition onto a surface under ambient conditions, the surface providing polyvalent cations, and
- reacting the water-soluble anionic bio-degradable polymer and polyvalent cations, thereby forming the bio-compatible impermeable membrane on the surface.
An aqueous composition for forming a bio-compatible impermeable membrane on a surface wherein the surface is one or more of concrete, cement material, or brick, consisting essentially of:
- (i) as a balance water,
- (ii) a water-soluble anionic bio-degradable polymer obtained from bacteria, wherein the water-soluble anionic bio-degradable polymer when in contact with polyvalent cations under ambient conditions forms a gel, the water-soluble anionic bio-degradable polymer being dissolved in the water, and
- (iii) platelet nanoparticles, the platelet nanoparticles being suspended in the water,
- wherein the water-soluble anionic bio-degradable polymer is in an amount of 1.5-10 wt %,
- wherein the platelet nanoparticles are present in an amount of 0.01-5 wt %, based on a total weight of the composition,
- wherein an amount (wt %) of water-soluble anionic bio-degradable polymer is larger than an amount of platelet nanoparticles,
- wherein an amount of platelet nanoparticles and water-soluble anionic bio-degradable polymer is 1.51-10 wt. %,
- wherein the water-soluble anionic bio-degradable polymer is selected from anionic polysaccharides or acidic biopolymers,
- wherein the polyvalent cation is one or more of calcium, iron, copper, strontium, cobalt, aluminium, zinc, magnesium, or nickel, and
- wherein the platelet nanoparticles are one or more of a natural or artificial clay, or a silicate mineral.
Dependencies are inferred from the claim text.