Hemicellulose-containing coatings
The present invention describes methods of treating cellulosic materials with a composition comprising hemicellulose and/or lignin and sucrose fatty acid esters to modify barrier functions of such materials. The methods as disclosed use hemicellulose or lignin combined with saccharide fatty acid esters to form films on cellulosic materials, including that the disclosure provides products made by such methods. The materials thus treated exhibit more effective barrier functions, and mechanical properties, and may be used in any application where such features are desired.
1 . A composition comprising a saccharide fatty acid ester (SFAE)-hemicellulose bound cellulose-based material, wherein the SFAE and hemicellulose are present at a concentration to cause the bound cellulose-based material to exhibit an oxygen permeability of from 10×10 −11 to 150×10 −11 (cm 2 mL O 2 )/(s mL mmHg).
2 . The composition of claim 1 , wherein the saccharide fatty acid ester contains at least one saccharide and at least one aliphatic group comprising 8 to 30 carbons, and the composition is present at a concentration to make the bound cellulose-based material hydrophobic compared to the same material with no composition.
3 . The composition of claim 1 , wherein the SFAE-hemicellulose composition is releasably or non-releasably bound to the cellulose-based material.
4 . The composition of claim 1 , the SFAE is present at a concentration to cause the bound hemicellulose-based material to exhibit a water contact angle of equal to or greater than 90°, where the water contact angle is effected in the absence of any secondary hydrophobes.
5 . The composition of claim 1 , wherein the composition comprises a hemicellulose content in % by dry weight of 1-99%.
6 . The composition of claim 1 , wherein the cellulose based material is selected from the group consisting of paper, paper sheets, paperboard, paper pulp, a food storage carton, parchment paper, cake board, butcher paper, release paper/liner, a food storage bag, a shopping bag, a shipping bag, bacon board, insulating material, tea bags, a coffee or tea container, a compost bag, eating utensil, a hot or cold beverage container, cup, a lid, plate, a carbonated liquid storage bottle, gift cards, a non-carbonated liquid storage bottle, wrapping food film, a garbage disposal container, a food handling implement, a fabric fibre, a water storage and conveying implement, alcoholic or non-alcoholic drink container, an outer casing or screen for electronic goods, an internal or external piece of furniture, a curtain and upholstery.