1 . A barrier composition comprising at least one starch, 10-30% by weight of plasticizer, in relation to the mass of starch and 1.1-25.0% by weight of microfibrillated cellulose (MFC) MFC, in relation to the mass of starch.
2 . The barrier composition according to claim 1 , wherein the composition comprises 1.1-3.9% by weight of MFC, in relation to the mass of starch.
3 . The barrier composition according to claim 1 , characterized in that it comprises 0.1-5.0% by weight of clay, in relation to the mass of starch, selected from bentonite, halloysite, vermiculite, kaolin, aluminosilicates, and montmorillonite.
4 . The barrier composition according to claim 1 , characterized in that it comprises 75-90% by weight of starch, in relation to the total mass of the composition, 9-22.4% by weight of a plasticizer, in relation to the total mass of the composition and 0.9-2.9% by weight of MFC, in relation to the total mass of the composition.
5 . The barrier composition according to claim 4 , characterized in that it comprises 0.9-1.5% by weight of clay, in relation to the total mass of the composition, selected from bentonite, halloysite, vermiculite, kaolin, aluminosilicates, and montmorillonite.
6 . The barrier composition according to claim 5 , characterized in that the plasticizer is selected from glycerol, 1-ethyl 3-methylimidazolium acetate, sorbitol, triethylene glycol, glucose, urea, mate extract, diethyl phthalate, n,n bis (2-hydroxyethyl) formamide, poly(vinyl alcohol), xylitol, or mixtures thereof and wherein the starch is modified or unmodified starch.
7 . (canceled)
8 . A multi-layer structure comprising the barrier composition according to claim 1 .
9 . A method of producing a barrier composition, the method comprising: a) providing an aqueous dispersion of starch, plasticizer, and MFC comprising 10-20% by weight of starch, based on the total mass of solution, 0.9-4.7% by weight of plasticizer, based on the total mass of solution and 1.0-3.1% by weight of MFC based on the total mass of solution; b1) homogenizing the aqueous dispersion of starch, plasticizer, and MFC by stirring; b2) heating the aqueous dispersion of starch, plasticizer, and MFC to 80-85° C. for 1 hour; c) cooling the aqueous dispersion of starch, plasticizer, and MFC under stirring to room temperature; and d) optionally, adding water to correct the initial value of the solution as measured before heating.
10 . The method of claim 9 , wherein the steps b1) of homogenizing the aqueous dispersion of starch, plasticizer, and MFC by stirring and b2) of heating the aqueous dispersion of starch, plasticizer, and MFC between 80-85° C. for 1 h occur concurrently.
11 . The method of claim 9 , wherein the added MFC is in the form of a pre-dispersion of MFC in water.
12 . The method of claim 9 , wherein step a) further comprises 0.1-5% of clay.
13 . The method, according to claim 9 , wherein the plasticizer is selected from glycerol, 1-ethyl 3-methylimidazolium acetate, sorbitol, triethylene glycol, glucose, urea, mate extract, diethyl phthalate, n,n bis (2-hydroxyethyl) formamide, poly(vinyl alcohol), xylitol, and mixtures thereof, and wherein the starch is modified or unmodified starch.
14 . (canceled)
15 . A multi-layer structure comprising: a) a carrier layer selected from the group consisting of polymers, composites, metals, alloys, glass, silicon, ceramics, wood, and paper; and b) a layer of starch-, plasticizer- and MFC-based barrier composition disposed on at least a portion of the carrier layer, wherein the barrier composition comprises: i. a starch, ii. a plasticizer, and iii. an MFC, and optionally, iv. 0.1-5% of clay.
16 . The multi-layer structure according to claim 15 , wherein the barrier composition comprises 70-90% by weight of starch, 1-30% by weight of plasticizer, in relation to the mass of starch and 0.1-10% by weight of MFC, in relation to the mass of starch.
17 . (canceled)
18 . The multi-layer structure according to claim 15 , characterized in that wherein the carrier layer comprises a LLDPE, a PP, a LDPE, a LLDPE, HDPE, PA, PET, PLA, PBT, PBS, PBSA, PCL, PHB, PHBV, their blends, composites, and nanocomposites.
19 . The multi-layer structure according to claim 15 , wherein the plasticizer is selected from glycerol, 1-ethyl 3-methylimidazolium acetate, sorbitol, triethylene glycol, glucose, urea, mate extract, diethyl phthalate, n,n bis (2-hydroxyethyl) formamide, poly(vinyl alcohol), xylitol, or mixtures thereof, and wherein the starch is modified or unmodified starch.
20 . (canceled)
21 . A package comprising the multi-layer structure of claim 15 .
22 . A method for producing a multi-layer structure comprising a barrier composition, the method comprising: a) providing a carrier layer selected from the group consisting of polymers, composites, metals, alloys, glass, silicon, ceramics, wood, and paper; and b) depositing on a face of the carrier layer, a layer of starch-, plasticizer- and MFC-based barrier composition, arranged in at least a portion of the first layer, in which the barrier composition comprises: i. a starch, ii. a plasticizer ii. an MFC, and optionally, iv. a clay; and c) drying the multi-layer, resulting in a multi-layer structure.
23 . (canceled)
24 . The method for producing a multi-layer structure according to claim 22 , wherein the barrier composition comprises 75-90% by weight of starch, in relation to the total mass of the composition, 9-22.4% by weight of plasticizer, in relation to the total mass of the composition, and 0.9-2.0% MFC by weight, in relation to the total mass of the composition.
25 . (canceled)
26 . The method for producing a multi-layer structure according to claim 22 , wherein the face of the carrier layer is subjected to a corona treatment before deposition, on the face of the carrier layer with corona treatment, a layer of starch-, plasticizer- and MFC-based barrier composition.
27 . The method for producing a multi-layer structure according to claim 22 , wherein the deposit of the barrier composition on the carrier layer is carried out by extrusion, co-extrusion, lamination, lamination combined with extrusion, coating, and/or deposition of layers from solutions or suspensions in a liquid medium (coatings), rotogravure and flexography and, preferably, continuous casting coating is used.
28 . The method for producing a multi-layer structure according to claim 22 , wherein the plasticizer is selected from glycerol, 1-ethyl 3-methylimidazolium acetate, sorbitol, triethylene glycol, glucose, urea, mate extract, diethyl phthalate, n,n bis (2-hydroxyethyl) formamide, poly(vinyl alcohol), xylitol, or mixtures thereof, and wherein the starch is modified or unmodified starch.
29 . (canceled)
30 . A low O 2 permeability structure comprising two or more layers wherein at least one of the layers is a layer comprising an O 2 permeation barrier composition comprising a starch, plasticizer, and an MFC, and optionally a clay.
31 . (canceled)
32 . The low O 2 permeability structure according to claim 30 , wherein the plasticizer is selected from glycerol, 1-ethyl 3-methylimidazolium acetate, sorbitol, triethylene glycol, glucose, urea, mate extract, diethyl phthalate, n,n bis (2-hydroxyethyl) formamide, poly(vinyl alcohol), xylitol, or mixtures thereof, and wherein the starch is modified or unmodified starch.
33 . (canceled)
