WO2025201508A1 - Novel high biomass content aqueous dispersion as barrier coating - Google Patents

Novel high biomass content aqueous dispersion as barrier coating

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Publication number
WO2025201508A1
WO2025201508A1 PCT/CN2025/085675 CN2025085675W WO2025201508A1 WO 2025201508 A1 WO2025201508 A1 WO 2025201508A1 CN 2025085675 W CN2025085675 W CN 2025085675W WO 2025201508 A1 WO2025201508 A1 WO 2025201508A1
Authority
WO
WIPO (PCT)
Prior art keywords
aqueous dispersion
solid content
biomass
polyhydroxyalkanoate
fibrillated cellulose
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2025/085675
Other languages
French (fr)
Inventor
Xiaoyu Chen
Jiasong YAN
Lan XIAO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kemira Asia Co Ltd
Kemira Oyj
Original Assignee
Kemira Asia Co Ltd
Kemira Oyj
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kemira Asia Co Ltd, Kemira Oyj filed Critical Kemira Asia Co Ltd
Publication of WO2025201508A1 publication Critical patent/WO2025201508A1/en
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
    • C08L1/02—Cellulose; Modified cellulose
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
    • C09D167/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/16—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only modified by a particular after-treatment
    • D21H11/18—Highly hydrated, swollen or fibrillatable fibres
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/10—Coatings without pigments
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • D21H19/34—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising cellulose or derivatives thereof
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/52—Cellulose; Derivatives thereof
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/16—Sizing or water-repelling agents
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/28—Colorants ; Pigments or opacifying agents

Definitions

  • the present invention relates to the field of barrier coatings.
  • the present invention relates to combinations of different chemicals or materials, which can be used as barrier coatings for substrates.
  • biomass materials In the preparation and production of barrier coatings, compared with currently widely used fossil-based materials, biomass materials have the advantages of being simple and easy to obtain, less toxic or even non-toxic, and environmentally friendly, thus they have attracted widespread attention from scientists.
  • the aqueous dispersion of the present invention has a high amount of solid content, for example, 10-60 wt%.
  • the amount of the solid content described herein refers to the ratio of the weight of the solid obtained after evaporating the aqueous dispersion to dryness to the weight of the aqueous dispersion.
  • the degree of fibrillation of fibers is divided into level 0-3. Fibers that have no fibrillation are level "0" , the fiber walls are smooth and the microfibers at the ends are basically not separated. Fibers that have medium fibrillation are classified as level “1” or “2” , the fiber wall is fluffy and the microfibers at the ends are separated in a broom shape. The degree of fibrillation of level “2” is greater than that of level “1” . Fibers with fully fibrillation are level “3” , the fiber wall is fully fluffed, and the microfibers at the ends are fibrillated like a large broom. See, National Standard of the People's Republic of China, GB/T 22836-2008, Pulp-Determination of fiber fibrillation.
  • the fibrillated cellulose described herein has a fibrillation level of 1, 2 or 3, preferably a fibrillation level of 2 or 3, more preferably a fibrillation level of 3.
  • the polyhydroxyalkanoate (PHA) comprises one or more recurring units derived from the group consisting of 3-hydroxybutyrate (3HB) , 3-hydroxypropionate (3HP) , 4-hydroxybutyrate (4HB) , 3-hydroxyvalerate (3HV) , 4-hydroxyvalerate (4HV) , 5-hydroxyvalerate (5HV) , 3-hydroxyhexanoate (3HH) , 6-hydroxyhexanoate (6HH) , 3-hydroxyoctanoate (3HO) , 3-hydroxydecanoate (3HD) , or combinations thereof.
  • the polyhydroxyalkanoate is derived from the recurring units 3-hydroxybutyrate, 3-hydroxyhexanoate, 4-hydroxybutyrate, or a combination thereof.
  • the polyhydroxyalkanoate accounts for 5-50 wt%of the aqueous dispersion, such as 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, 11.5, 12.0, 12.5, 13.0, 13.5, 14.0, 14.5, 15.0, 15.5, 16.0, 16.5, 17.0, 17.5, 18.0, 18.5, 19.0, 19.5, 20.0, 20.5, 21.0, 21.5, 22.0, 22.5, 23.0, 23.5, 24.0, 24.5, 25.0, 25.5, 26.0, 26.5, 27.0, 27.5, 28.0, 28.5, 29.0, 29.5, 30.0, 30.5, 31.0, 31.5, 32.0, 32.5, 33.0, 33.5, 34.0, 34.5, 35.0, 35.5, 36.0, 36.5, 37.0, 37.5, 38.0, 38.5, 39.0, 39.5, 40.0, 40.5, 41.0, 41.5, 42.0, 42.5, 43
  • the aqueous dispersion optionally comprises an additive.
  • the additive can be a surfactant or other substances.
  • the surfactant may be an anionic surfactant, a cationic surfactant, a nonionic surfactant, a zwitterionic surfactant, or combinations thereof.
  • Exemplary cationic surfactants comprise amine salt surfactants, quaternary ammonium salt surfactants, heterocyclic surfactants, onium salt surfactants, or combinations thereof.
  • exemplary cationic surfactants comprise salts of long chain alkyl (e.g., C 10 -C 20 ) (primary, secondary, tertiary) amines, dodecyldimethylbenzylammonium chloride, polyquaternium salt, cetyltrimethylammonium chloride, octadecyltrimethylammonium chloride, cationic guar gum, etc.
  • Exemplary anionic surfactants comprise salts of long chain fatty acid (e.g., C 10 -C 20 fatty acid) , long chain alkyl (e.g., C 10 -C 20 ) sulfate salts, long chain alkyl (e.g., C 10 -C 20 ) sulfonate salts, or combinations thereof.
  • exemplary anionic surfactants comprise sodium stearate, magnesium stearate, calcium stearate, sodium palmitate, magnesium palmitate, calcium palmitate, sodium oleate, magnesium oleate, sodium dodecyl sulfate, sodium cetyl sulfate, sodium octadecyl sulfate, sodium dodecyl benzene sulfonate, sodium dioctyl succinate sulfonate, etc.
  • nonionic surfactants comprise polyoxyethylene fatty alcohol ethers, polyoxyethylene fatty acid esters or polyoxyethylene sugar alcohols, fatty acid glycerides, or combinations thereof.
  • nonionic surfactants comprise polyoxyethylene (e.g., C 10 -C 18 , preferably C 12 -C 16 ) fatty alcohols, or polyoxyethylene sorbitol (e.g., Tween, such as Tween 20, 40, 60, 80 or 85) and polyoxyethylene sorbitan (e.g., Span, such as Span 20, 40, 60, 80 or 85) , etc.
  • Exemplary zwitterionic surfactants comprise amino acid type surfactants.
  • the surfactant is preferably Tween, oleate, stearate, palmitate, hydroxystearyl alcohol, hydroxystearyl glucoside, styrene maleic anhydride, or combinations thereof.
  • the additive may be metal salts of oleate (such as sodium, potassium, or calcium salts) , Tween, metal salts of palmitate (such as sodium, potassium, or calcium salts) , styrene maleic anhydride polymer, betaine, or a combination thereof.
  • metal salts of oleate such as sodium, potassium, or calcium salts
  • Tween metal salts of palmitate
  • styrene maleic anhydride polymer such as sodium, potassium, or calcium salts
  • betaine such as sodium, potassium, or calcium salts
  • the additive accounts for 0.1-10 wt%of the aqueous dispersion, such as 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9, 6, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, 7, 7.1, 7.2, 7.3, 7.4, 7.5, 7.6, 7.7, 7.8, 7.9, 8, 8.1, 8.2, 8.3, 8.4, 8.5
  • the present invention provides an aqueous dispersion wherein the solid content comprises polyhydroxyalkanoate, fibrillated cellulose and optional additives, and the rest is water.
  • the polyhydroxyalkanoate accounts for 5-50 wt%of the aqueous dispersion.
  • the fibrillated cellulose accounts for 0.5-2.5 wt%of the aqueous dispersion.
  • the additives accounts for 0.1-10 wt%of the aqueous dispersion, such as 1-10 wt%.
  • the substrate comprises paper, cardboard, fiberboard, starch, glass, metal, organic foam, inorganic foam, polymer film, or combinations thereof.
  • the substrate is paper.
  • FIG. 2 shows the SEM of MFC-2 as used in the examples.
  • Figure 4 shows the SEM of non-fibrillated cellulose as used in the comparative example.
  • Substrate Cardboard, gram weight: 230g/m 2 .
  • PHA Polyhydroxyalkanoates
  • PHA-1 poly 3-hydroxybutyrate-co-4-hydroxybutyrate, molecular weight about 500, 000 Daltons.
  • PHA-2 poly 3-hydroxybutyrate-co-3-hydroxyhexanoate, molecular weight about 600, 000 Daltons.
  • Styrene maleic anhydride polymer molecular weight: ⁇ 20000.
  • test time is 5 minutes.
  • an aqueous dispersion of the present invention with a biomass content of 100 wt% was prepared, in which the solid content accounted for 30 wt%of the aqueous dispersion. After standing for two hours, the aqueous dispersion is stable by visual inspection, and coatable. The aqueous dispersion was coated on paper with a coating weight of 15.3 gsm.
  • an aqueous dispersion of the present invention with a biomass content of 93.3 wt% was prepared, in which the solid content accounted for 22.3 wt%of the aqueous dispersion. After standing for two hours, the aqueous dispersion is stable by visual inspection, and coatable. The aqueous dispersion was coated on paper with a coating weight of 15.1 gsm.
  • an aqueous dispersion of the present invention with a biomass content of 93.3 wt% was prepared, in which the solid content accounted for 30 wt%of the aqueous dispersion. After standing for two hours, the aqueous dispersion is stable by visual inspection, and coatable. The aqueous dispersion was coated on paper with a coating weight of 25.6 gsm.
  • an aqueous dispersion of the present invention with a biomass content of 100 wt% was prepared, in which the solid content accounted for 27 wt%of the aqueous dispersion. After standing for two hours, the aqueous dispersion is stable by visual inspection, and coatable. The aqueous dispersion was coated on paper with a coating weight of 18.1 gsm.
  • an aqueous dispersion of the present invention with a biomass content of 92.9 wt% was prepared, in which the solid content accounted for 28.0 wt%of the aqueous dispersion. After standing for two hours, the aqueous dispersion is stable by visual inspection, and coatable. The aqueous dispersion was coated on paper with a coating weight of 24.9 gsm.
  • composition of Table 1 a composition with a biomass content of 94.6 wt%was prepared, in which the solid content accounted for 27.7 wt%of the composition.
  • the composition cannot be prepared as a stable dispersion (by visual inspection after standing for two hours) , so that it is not coatable.
  • Table 2 shows that the five samples of Examples 1-5 can all achieve coatable properties when the biomass content is about 93%or even greater than 95%. Moreover, the resulting coating exhibits excellent water-resistance, oil-resistance and heat-sealing properties without requiring a higher coating weight. Moreover, the technical solution of the present invention can also achieve improved adhesiveness, which can be supported by the fact that the coated coating is not easy to exfoliate from the surface of the substrate. Moreover, good heat sealing strength can also support the improved adhesiveness. In contrast, the composition of Comparative Example 1 cannot be prepared as a stable dispersion, so that it is not coatable. Therefore, the technical solution of the present invention can achieve excellent technical effects of the present invention.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
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Abstract

The present invention relates to a novel aqueous dispersion with high biomass content for use as barrier coatings on substrates. The biomass in the dispersion comprises a combination of fibrillated cellulose and polyhydroxyalkanoate (PHA). The aqueous dispersion of the present invention provides good water-resistance, oil-resistance and oxygen barrier property, and the heat sealability thereof is also good. Meanwhile, the production process of the aqueous dispersion is environmentally friendly and sustainable, and it can be applied by a simple coating process, thus it has important application prospects.

Description

NOVEL HIGH BIOMASS CONTENT AQUEOUS DISPERSION AS BARRIER COATING FIELD OF THE INVENTION
The present invention relates to the field of barrier coatings. In particular, the present invention relates to combinations of different chemicals or materials, which can be used as barrier coatings for substrates.
BACKGROUND OF THE INVENTION
In the preparation and production of barrier coatings, compared with currently widely used fossil-based materials, biomass materials have the advantages of being simple and easy to obtain, less toxic or even non-toxic, and environmentally friendly, thus they have attracted widespread attention from scientists.
In the process of developing barrier coatings based on biomass materials, it is an important challenge in this field to achieve excellent barrier effect and meanwhile contain high biomass content. Currently, in some published patent documents, biodegradable biomass materials such as cellulose and polyhydroxyalkanoate are widely used in the field to develop novel biomass-based barrier coatings. However, these materials also have inherent defects. For example, cellulose has good hydrophilicity and poor water-resistance, due to the presence of a large number of hydroxyl groups in its structure. Since polyhydroxyalkanoate has poor water solubility, a large amount of organic solvents and high application temperatures (i.e., melt extrusion) need to be applied in relevant applications thereof. It does not comply with the concepts of green chemistry and sustainable development pursued in chemical production. Therefore, there is huge margin for improvement in the related production processes.
In addition, currently in this field, materials with different barrier properties are separately applied through coating machines or extruders as multiple layers on the substrate (for example, first coating or extruding a layer of nanocellulose on the substrate, and after drying, then coating or extruding a layer of PLA or other chemicals) , and by increasing the coating or extrusion amount in each layer to improve the overall barrier properties. Such a strategy can effectively fill the pores of the substrate, thereby improving the barrier effect, and circumvent the technical difficulty of finding chemicals capable of being compatible with various formulations. However, the defects are as follows: the consumption of raw materials is large and the coating operation is very complicated, or the inapplicability of coating process so as to use only the more energy and money consuming extrusion process.
It can be seen that there are still obvious defects in the prior art in this field. Therefore, it becomes a key development direction in this field to develop novel biomass-based barrier materials, to find chemicals capable of being compatible with various formulations in the absence of organic solvent and heating, to improve the barrier effect, and to make the preparation process more environmentally friendly.
SUMMARY OF THE INVENTION
The present invention provides an aqueous dispersion. In one embodiment, the aqueous dispersion of the present invention can be used to prepare barrier coatings. In one embodiment, the aqueous dispersion of the present invention has a high amount of solid content (e.g., 10-60 wt%) . In one embodiment, the solid content has a high biomass content (e.g., 90-100 wt%) . The aqueous dispersion comprises fibrillated cellulose (FC) and polyhydroxyalkanoate (PHA) .
The aqueous dispersion described herein are capable of providing coatings with good barrier properties. The aqueous dispersion of the present invention is particularly suitable for application on substrates to prepare coatings. The coating is biomass-containing, biodegradable and has good barrier properties. The substrate comprises paper, cardboard, fiberboard, starch, glass, metal, organic foam, inorganic foam, polymer film, or combinations thereof.
The aqueous dispersion of the present invention has a high amount of solid content, for example, 10-60 wt%. The amount of the solid content described herein refers to the ratio of the weight of the solid obtained after evaporating the aqueous dispersion to dryness to the weight of the aqueous dispersion.
The solid content of the aqueous dispersion of the present invention has a high biomass content, for example, a biomass content of 90-100 wt%, even more than 95 wt%. The biomass content described herein refers to the weight ratio of the biomass to the solid obtained after evaporating the aqueous dispersion to dryness.
The biomass raw material includes fibrillated cellulose and polyhydroxyalkanoate (PHA) , preferably consists essentially of fibrillated cellulose and polyhydroxyalkanoate (PHA) , and more preferably consists of fibrillated cellulose and polyhydroxyalkanoate (PHA) .
The combination of PHA and fibrillated cellulose described herein can achieve excellent water-resistance, oil-resistance and oxygen barrier property. In addition, the technical solution of the present invention also has the following technical advantages: (1) The aqueous dispersion of the present invention can be prepared at room temperature and does not include organic solvents (that is, there is no need to use organic solvents) ; (2) The coating obtained from the aqueous dispersion has good heat sealability; (3) The coating method is simple and low-cost, and excellent barrier properties can be achieved by coating a single type of aqueous dispersion; (4) The resulting coating has excellent adhesiveness and can firmly adhere to the substrate. The coating exfoliation can be significantly improved.
In the present invention, the amount of solid content in the aqueous dispersion, the amount of various components in the aqueous dispersion, and the amount of biomass component in the solid content and the like are measured according to general methods in the field. The amount of solid content in the aqueous dispersion is the mass percentage of the solid content obtained after evaporating the aqueous dispersion to dryness in the aqueous dispersion. The amounts of various components in the aqueous dispersion are the mass percentages of various components in the aqueous dispersion. The amounts of biomass components in the solid content are the mass percentages of the biomass components in the solid content. The content is expressed in the form of mass percentage.
Herein, biomass and bio-based materials are used interchangeably to describe materials derived from bio-based raw materials, so as to distinguish from materials derived from fossil-based raw materials.
The aqueous dispersion as described herein comprises water and solid content dispersed therein, preferably consists of water and solid content dispersed therein. In one embodiment, the solid content described herein is used to describe any components in the dispersion other than water. In another embodiment, the solid content described herein is used to describe the remaining solids after evaporating the aqueous dispersion to dryness. Those skilled in the art can determine the meaning of the term “solid content” according to the actual situation. In some embodiments, solid content and solid are used interchangeably.
In one embodiment, the aqueous dispersion as described herein is free of volatile components.
In one embodiment, the aqueous dispersion as described herein is free of organic solvents.
In one embodiment, the aqueous dispersion of the present invention can be used as barrier coatings.
In one embodiment, due to the absence of volatile components or organic solvents, the amount of solid content can be indicated by the amount of all other components in the dispersion than water, or the amount of the resulting solids after evaporating the aqueous dispersion to dryness, because the two are substantially the same.
In one embodiment, the aqueous dispersion of the present invention comprises a solid content in an amount of 10-60 wt%, such as 10.0, 10.2, 10.4, 10.6, 10.8, 11.0, 11.2, 11.4, 11.6, 11.8, 12.0, 12.2, 12.4, 12.6, 12.8, 13.0, 13.2, 13.4, 13.6, 13.8, 14.0, 14.2, 14.4, 14.6, 14.8, 15.0, 15.2, 15.4, 15.6, 15.8, 16.0, 16.2, 16.4, 16.6, 16.8, 17.0, 17.2, 17.4, 17.6, 17.8, 18.0, 18.2, 18.4, 18.6, 18.8, 19.0, 19.2, 19.4, 19.6, 19.8, 20.0, 20.2, 20.4, 20.6, 20.8, 21.0, 21.2, 21.4, 21.6, 21.8, 22.0, 22.2, 22.4, 22.6, 22.8, 23.0, 23.2, 23.4, 23.6, 23.8, 24.0, 24.2, 24.4, 24.6, 24.8, 25.0, 25.2, 25.4, 25.6, 25.8, 26.0, 26.2, 26.4, 26.6, 26.8, 27.0, 27.2, 27.4, 27.6, 27.8, 28.0, 28.2, 28.4, 28.6, 28.8, 29.0, 29.2, 29.4, 29.6, 29.8, 30.0, 30.2, 30.4, 30.6, 30.8, 31.0, 31.2, 31.4, 31.6, 31.8, 32.0, 32.2, 32.4, 32.6, 32.8, 33.0, 33.2, 33.4, 33.6, 33.8, 34.0, 34.2, 34.4, 34.6, 34.8, 35.0, 35.2, 35.4, 35.6, 35.8, 36.0, 36.2, 36.4, 36.6, 36.8, 37.0, 37.2, 37.4, 37.6, 37.8, 38.0, 38.2, 38.4, 38.6, 38.8, 39.0, 39.2, 39.4, 39.6, 39.8, 40.0, 40.2, 40.4, 40.6, 40.8, 41.0, 41.2, 41.4, 41.6, 41.8, 42.0, 42.2, 42.4, 42.6, 42.8, 43.0, 43.2, 43.4, 43.6, 43.8, 44.0, 44.2, 44.4, 44.6, 44.8, 45.0, 45.2, 45.4, 45.6, 45.8, 46.0, 46.2, 46.4, 46.6, 46.8, 47.0, 47.2, 47.4, 47.6, 47.8, 48.0, 48.2, 48.4, 48.6, 48.8, 49.0, 49.2, 49.4, 49.6, 49.8, 50.0, 50.2, 50.4, 50.6, 50.8, 51.0, 51.2, 51.4, 51.6, 51.8, 52.0, 52.2, 52.4, 52.6, 52.8, 53.0, 53.2, 53.4, 53.6, 53.8, 54.0, 54.2, 54.4, 54.6, 54.8, 55.0, 55.2, 55.4, 55.6, 55.8, 56.0, 56.2, 56.4, 56.6, 56.8, 57.0, 57.2, 57.4, 57.6, 57.8, 58.0, 58.2, 58.4, 58.6, 58.8, 59.0, 59.2, 59.4, 59.6, 59.8, 60.0 wt%, or a sub-range consisting of any value of these ranges, preferably 20-50 wt%.
In one embodiment, the solid content of the aqueous dispersion comprises a biomass content in an amount of greater than or equal to 90 wt%, such as 90.0, 90.2, 90.4, 90.6, 90.8, 91.0, 91.2, 91.4, 91.6, 91.8, 92.0, 92.2, 92.4, 92.6, 92.8, 93.0, 93.2, 93.4, 93.6, 93.8, 94.0, 94.2, 94.4, 94.6, 94.8, 95.0, 95.2, 95.4, 95.6, 95.8, 96.0, 96.2, 96.4, 96.6, 96.8, 97.0, 97.2, 97.4, 97.6, 97.8, 98.0, 98.2, 98.4, 98.6, 98.8, 99.0, 99.2, 99.4, 99.6, 99.8, 100.0 wt%, or a sub-range consisting of any value of these ranges, preferably greater than or equal to 93 wt%, more preferably greater than or equal to 95 wt%.
In one embodiment, the biomass comprises fibrillated cellulose and polyhydroxyalkanoate (PHA) . In one embodiment, the aqueous dispersion comprises fibrillated cellulose and polyhydroxyalkanoate.
In one embodiment, the fibrillated cellulose comprises at least one selected from the group consisting of microfibrillated cellulose (MFC) and nanofibrillated cellulose.
In one embodiment, the source of fibrillated cellulose comprises one or more selected from the group consisting of wood, hemp, unrefined hardwood, refined hardwood, unrefined softwood, refined softwood, cocoa pod shells.
In one embodiment, the fibrillated cellulose is in a micro-meter scale, i.e., having a particle size of 10-100 μm, such as 10, 12.5, 15, 17.5, 20, 22.5, 25, 27.5, 30, 32.5, 35, 37.5, 40, 42.5, 45, 47.5, 50, 52.5, 55, 57.5, 60, 62.5, 65, 67.5, 70, 72.5, 75, 77.5, 80, 82.5, 85, 87.5, 90, 92.5, 95, 97.5, 100 μm, or a sub-range consisting of any value of these ranges. In one embodiment, the fibrillated cellulose is a micro-nano secondary structure with "tentacles" . Said tentacles can be fine filament in nano-meter scale. That is, there are fine filaments in nano-meter scale (e.g., in length) on the side wall of the fibrillated cellulose in a micro-meter scale (e.g., in length) .
In one embodiment, the aspect ratio of the fibrillated cellulose is 40:1-200: 1, such as 40: 1, 42: 1, 44: 1, 46: 1, 48: 1, 50: 1, 52: 1, 54: 1, 56: 1, 58:1, 60: 1, 62: 1, 64: 1, 66: 1, 68: 1, 70: 1, 72: 1, 74: 1, 76: 1, 78: 1, 80: 1, 82: 1, 84:1, 86: 1, 88: 1, 90: 1, 92: 1, 94: 1, 96: 1, 98: 1, 100: 1, 102: 1, 104: 1, 106: 1, 108: 1, 110: 1, 112: 1, 114: 1, 116: 1, 118: 1, 120: 1, 122: 1, 124: 1, 126: 1, 128: 1, 130: 1, 132: 1, 134: 1, 136: 1, 138: 1, 140: 1, 142: 1, 144: 1, 146: 1, 148: 1, 150: 1, 152: 1, 154: 1, 156: 1, 158: 1, 160: 1, 162: 1, 164: 1, 166: 1, 168: 1, 170: 1, 172: 1, 174: 1, 176: 1, 178: 1, 180: 1, 182: 1, 184: 1, 186: 1, 188: 1, 190: 1, 192: 1, 194: 1, 196: 1, 198: 1, 200: 1, or a sub-range consisting of any value of these ranges.
In one embodiment, the content of the fibrillated cellulose accounts for 0.1-5 wt%of the aqueous dispersion, such as 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1.0, 1.05, 1.1, 1.15, 1.2, 1.25, 1.3, 1.35, 1.4, 1.45, 1.5, 1.55, 1.6, 1.65, 1.7, 1.75, 1.8, 1.85, 1.9, 1.95, 2.0, 2.05, 2.1, 2.15, 2.2, 2.25, 2.3, 2.35, 2.4, 2.45, 2.5, 2.55, 2.6, 2.65, 2.7, 2.75, 2.8, 2.85, 2.9, 2.95, 3.0, 3.05, 3.1, 3.15, 3.2, 3.25, 3.3, 3.35, 3.4, 3.45, 3.5, 3.55, 3.6, 3.65, 3.7, 3.75, 3.8, 3.85, 3.9, 3.95, 4.0, 4.05, 4.1, 4.15, 4.2, 4.25, 4.3, 4.35, 4.4, 4.45, 4.5, 4.55, 4.6, 4.65, 4.7, 4.75, 4.8, 4.85, 4.9, 4.95, 5.0 wt%, or a sub-range consisting of any value of these ranges, preferably 0.5-2.5 wt%of the aqueous dispersion.
In one embodiment, the fibrillated cellulose is in the form of slurry. It is known to those skilled in the art that, except for the fibrillated cellulose, the rest of the slurry is water. In one embodiment, when calculating the mass percentage of the fibrillated cellulose in the aqueous dispersion, the water in the slurry is deducted and only the mass percentage of the fibrillated cellulose of the slurry in the aqueous dispersion is calculated. On the other hand, the mass of water of the slurry should be part of the mass of water in the aqueous dispersion.
Usually, the degree of fibrillation of fibers is divided into level 0-3. Fibers that have no fibrillation are level "0" , the fiber walls are smooth and the microfibers at the ends are basically not separated. Fibers that have medium fibrillation are classified as level “1” or “2” , the fiber wall is fluffy and the microfibers at the ends are separated in a broom shape. The degree of fibrillation of level “2” is greater than that of level “1” . Fibers with fully fibrillation are level “3” , the fiber wall is fully fluffed, and the microfibers at the ends are fibrillated like a large broom. See, National Standard of the People's Republic of China, GB/T 22836-2008, Pulp-Determination of fiber fibrillation.
In one embodiment, the fibrillated cellulose described herein has a fibrillation level of 1, 2 or 3, preferably a fibrillation level of 2 or 3, more preferably a fibrillation level of 3.
In one embodiment, the polyhydroxyalkanoate (PHA) comprises one or more recurring units derived from the group consisting of 3-hydroxybutyrate (3HB) , 3-hydroxypropionate (3HP) , 4-hydroxybutyrate (4HB) , 3-hydroxyvalerate (3HV) , 4-hydroxyvalerate (4HV) , 5-hydroxyvalerate (5HV) , 3-hydroxyhexanoate (3HH) , 6-hydroxyhexanoate (6HH) , 3-hydroxyoctanoate (3HO) , 3-hydroxydecanoate (3HD) , or combinations thereof.
In one embodiment, the polyhydroxyalkanoate is derived from the recurring units 3-hydroxybutyrate, 3-hydroxyhexanoate, 4-hydroxybutyrate, or a combination thereof.
In one embodiment, the polyhydroxyalkanoate accounts for 5-50 wt%of the aqueous dispersion, such as 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, 11.5, 12.0, 12.5, 13.0, 13.5, 14.0, 14.5, 15.0, 15.5, 16.0, 16.5, 17.0, 17.5, 18.0, 18.5, 19.0, 19.5, 20.0, 20.5, 21.0, 21.5, 22.0, 22.5, 23.0, 23.5, 24.0, 24.5, 25.0, 25.5, 26.0, 26.5, 27.0, 27.5, 28.0, 28.5, 29.0, 29.5, 30.0, 30.5, 31.0, 31.5, 32.0, 32.5, 33.0, 33.5, 34.0, 34.5, 35.0, 35.5, 36.0, 36.5, 37.0, 37.5, 38.0, 38.5, 39.0, 39.5, 40.0, 40.5, 41.0, 41.5, 42.0, 42.5, 43.0, 43.5, 44.0, 44.5, 45.0, 45.5, 46.0, 46.5, 47.0, 47.5, 48.0, 48.5, 49.0, 49.5, 50.0 wt%, or a sub-range consisting of any value of these ranges, preferably 15-35 wt%.
In one embodiment, the aqueous dispersion optionally comprises an additive. In one embodiment, the additive can be a surfactant or other substances. In another embodiment, the surfactant may be an anionic surfactant, a cationic surfactant, a nonionic surfactant, a zwitterionic surfactant, or combinations thereof.
Exemplary cationic surfactants comprise amine salt surfactants, quaternary ammonium salt surfactants, heterocyclic surfactants, onium salt surfactants, or combinations thereof. Preferably, exemplary cationic surfactants comprise salts of long chain alkyl (e.g., C10-C20) (primary, secondary, tertiary) amines, dodecyldimethylbenzylammonium chloride, polyquaternium salt, cetyltrimethylammonium chloride, octadecyltrimethylammonium chloride, cationic guar gum, etc.
Exemplary anionic surfactants comprise salts of long chain fatty acid (e.g., C10-C20 fatty acid) , long chain alkyl (e.g., C10-C20) sulfate salts, long chain alkyl (e.g., C10-C20) sulfonate salts, or combinations thereof. Preferably, exemplary anionic surfactants comprise sodium stearate, magnesium stearate, calcium stearate, sodium palmitate, magnesium palmitate, calcium palmitate, sodium oleate, magnesium oleate, sodium dodecyl sulfate, sodium cetyl sulfate, sodium octadecyl sulfate, sodium dodecyl benzene sulfonate, sodium dioctyl succinate sulfonate, etc.
Exemplary nonionic surfactants comprise polyoxyethylene fatty alcohol ethers, polyoxyethylene fatty acid esters or polyoxyethylene sugar alcohols, fatty acid glycerides, or combinations thereof. For example, nonionic surfactants comprise polyoxyethylene (e.g., C10-C18, preferably C12-C16) fatty alcohols, or polyoxyethylene sorbitol (e.g., Tween, such as Tween 20, 40, 60, 80 or 85) and polyoxyethylene sorbitan (e.g., Span, such as Span 20, 40, 60, 80 or 85) , etc.
Exemplary zwitterionic surfactants comprise amino acid type surfactants.
In one embodiment, the surfactant is preferably Tween, oleate, stearate, palmitate, hydroxystearyl alcohol, hydroxystearyl glucoside, styrene maleic anhydride, or combinations thereof.
In one embodiment, the additive can be biomass-based or fossil-based.
In one embodiment, the additive may be metal salts of oleate (such as sodium, potassium, or calcium salts) , Tween, metal salts of palmitate (such as sodium, potassium, or calcium salts) , styrene maleic anhydride polymer, betaine, or a combination thereof.
In one embodiment, the additive accounts for 0.1-10 wt%of the aqueous dispersion, such as 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9, 6, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, 7, 7.1, 7.2, 7.3, 7.4, 7.5, 7.6, 7.7, 7.8, 7.9, 8, 8.1, 8.2, 8.3, 8.4, 8.5, 8.6, 8.7, 8.8, 8.9, 9, 9.1, 9.2, 9.3, 9.4, 9.5, 9.6, 9.7, 9.8, 9.9, 10 wt%, or a sub-range consisting of any value of these ranges, preferably 0.1-5wt%.
In one embodiment, the present invention provides an aqueous dispersion wherein the solid content comprises polyhydroxyalkanoate, fibrillated cellulose and optional additives, and the rest is water. In a preferred embodiment, the polyhydroxyalkanoate accounts for 5-50 wt%of the aqueous dispersion. In a preferred embodiment, the fibrillated cellulose accounts for 0.5-2.5 wt%of the aqueous dispersion. In a preferred embodiment, the additives accounts for 0.1-10 wt%of the aqueous dispersion, such as 1-10 wt%.
In one embodiment, the substrate comprises paper, cardboard, fiberboard, starch, glass, metal, organic foam, inorganic foam, polymer film, or combinations thereof.
In one embodiment, the substrate is paper.
In one embodiment, the aqueous dispersion used herein is coatable. That is, it can be coated on a substrate.
Unless otherwise specified, the percentages, proportions, ratios, contents or parts described in the present invention are based on mass or volume fraction.
Brief Description of the Drawings
Figure 1 shows the SEM of MFC-1 as used in the examples.
Figure 2 shows the SEM of MFC-2 as used in the examples.
Figure 3 shows the SEM of MFC-3 as used in the examples.
Figure 4 shows the SEM of non-fibrillated cellulose as used in the comparative example.
DETAILED DESCRIPTION
For a better understanding of the present invention, references will now be made to the following examples which are illustrative, rather than being limitative to the present invention. The experimental procedures described in the following Examples, unless otherwise specified, are conventional procedures; the reagents and materials, unless otherwise specified, are commercially available.
Materials and Methods
Substrate: Cardboard, gram weight: 230g/m2.
Fibrillated cellulose: microfibrillated cellulose (MFC)
MFC-1: from wood pulp; a slurry with concentration of 4.35wt%; particle size: 10-50 μm, a fibrillation level of 3. SEM is shown in Fig. 1.
MFC-2: from wood pulp; a slurry with concentration of 4.35wt%; particle size: 10-50 μm, a fibrillation level of 3. SEM is shown in Fig. 2.
MFC-3: from wood pulp; a slurry with concentration of 4.35wt%; particle size: 10-50 μm, a fibrillation level of 3. SEM is shown in Fig. 3.
Non-fibrillated cellulose: from wood pulp; a slurry with concentration of 3.58 wt%; particle size: 80-120 μm, a fibrillation level of 0. SEM is shown in Fig. 4.
Polyhydroxyalkanoates (PHA) :
PHA-1: poly 3-hydroxybutyrate-co-4-hydroxybutyrate, molecular weight about 500, 000 Daltons.
PHA-2: poly 3-hydroxybutyrate-co-3-hydroxyhexanoate, molecular weight about 600, 000 Daltons.
Additives:
Sodium oleate (bio-based material) , chemically pure.
Tween 80, chemically pure.
Calcium Palmitate (bio-based material) , chemically pure.
Styrene maleic anhydride polymer, molecular weight: ～20000.
Betaine (bio-based material) , anhydrous, 98%.
Water-resistance Cobb 300 test
According to TAPPI T 441 standard method, the test time is 5 minutes.
Oil-resistance test
According to ASTM F119-82 standard method.
Heat sealability test
According to GB/T 25436-2010 Appendix A.
General method for dispersion preparation: Weigh various components as needed, mix with water, and stir at a speed of 5000 rpm until uniform to obtain a dispersion. The composition of the resulting dispersion is shown in Table 1.
General protocols for coating the barrier material on a substrate: coat the aqueous dispersion on the substrate by a coater to obtain a substrate coated with the aqueous dispersion, then place the substrate coated with the aqueous dispersion into a hot oven to dry it at a drying temperature of 105-180℃. After coating and drying, the substrate is placed in a constant temperature and humidity laboratory overnight, and then the performance is evaluated.
Example 1
According to the composition of Table 1, an aqueous dispersion of the present invention with a biomass content of 100 wt%was prepared, in which the solid content accounted for 30 wt%of the aqueous dispersion. After standing for two hours, the aqueous dispersion is stable by visual inspection, and coatable. The aqueous dispersion was coated on paper with a coating weight of 15.3 gsm.
Example 2
According to the composition of Table 1, an aqueous dispersion of the present invention with a biomass content of 93.3 wt%was prepared, in which the solid content accounted for 22.3 wt%of the aqueous dispersion. After standing for two hours, the aqueous dispersion is stable by visual inspection, and coatable. The aqueous dispersion was coated on paper with a coating weight of 15.1 gsm.
Example 3
According to the composition of Table 1, an aqueous dispersion of the present invention with a biomass content of 93.3 wt%was prepared, in which the solid content accounted for 30 wt%of the aqueous dispersion. After standing for two hours, the aqueous dispersion is stable by visual inspection, and coatable. The aqueous dispersion was coated on paper with a coating weight of 25.6 gsm.
Example 4
According to the composition of Table 1, an aqueous dispersion of the present invention with a biomass content of 100 wt%was prepared, in which the solid content accounted for 27 wt%of the aqueous dispersion. After standing for two hours, the aqueous dispersion is stable by visual inspection, and coatable. The aqueous dispersion was coated on paper with a coating weight of 18.1 gsm.
Example 5
According to the composition of Table 1, an aqueous dispersion of the present invention with a biomass content of 92.9 wt%was prepared, in which the solid content accounted for 28.0 wt%of the aqueous dispersion. After standing for two hours, the aqueous dispersion is stable by visual inspection, and coatable. The aqueous dispersion was coated on paper with a coating weight of 24.9 gsm.
Comparative Example 1
According to the composition of Table 1, a composition with a biomass content of 94.6 wt%was prepared, in which the solid content accounted for 27.7 wt%of the composition. The composition cannot be prepared as a stable dispersion (by visual inspection after standing for two hours) , so that it is not coatable.
Table 1 The added amounts of ingredients in the samples of Examples 1-5 and Comparative Example 1

The above Examples were subjected to various tests to characterize their properties. The specific results are shown in the Test below.
Test 1
The barrier properties against water or oil, and the heat sealing property of the samples of Examples 1-5 were tested, and the results are shown in Table 2.
Table 2 Test of the barrier properties and heat sealing performance of the samples of Examples 1-5
Table 2 shows that the five samples of Examples 1-5 can all achieve coatable properties when the biomass content is about 93%or even greater than 95%. Moreover, the resulting coating exhibits excellent water-resistance, oil-resistance and heat-sealing properties without requiring a higher coating weight. Moreover, the technical solution of the present invention can also achieve improved adhesiveness, which can be supported by the fact that the coated coating is not easy to exfoliate from the surface of the substrate. Moreover, good heat sealing strength can also support the improved adhesiveness. In contrast, the composition of Comparative Example 1 cannot be prepared as a stable dispersion, so that it is not coatable. Therefore, the technical solution of the present invention can achieve excellent technical effects of the present invention.

Claims (12)

  1. An aqueous dispersion, comprising fibrillated cellulose and polyhydroxyalkanoate (PHA) .
  2. The aqueous dispersion according to claim 1, wherein the aqueous dispersion has a solid content in an amount of 10-60 wt%, preferably 20-50 wt%.
  3. The aqueous dispersion according to any one of the preceding claims, wherein the solid content comprises a biomass content in an amount of greater than 90 wt%, preferably greater than or equal to 93 wt%, more preferably greater than or equal to 95 wt%.
  4. The aqueous dispersion according to any one of the preceding claims, wherein the fibrillated cellulose comprises at least one selected from the group consisting of microfibrillated cellulose and nanofibrillated cellulose, preferably microfibrillated cellulose.
  5. The aqueous dispersion according to any one of the preceding claims, wherein the fibrillated cellulose accounts for 0.1-5 wt%, preferably 0.5-2.5 wt%of the aqueous dispersion.
  6. The aqueous dispersion according to any one of the preceding claims, wherein the polyhydroxyalkanoate comprises one or more recurring units derived from the group consisting of 3-hydroxybutyrate (3HB) , 3-hydroxypropionate (3HP) , 4-hydroxybutyrate (4HB) , 3-hydroxyvalerate (3HV) , 4-hydroxyvalerate (4HV) , 5-hydroxyvalerate (5HV) , 3-hydroxyhexanoate (3HH) , 6-hydroxyhexanoate (6HH) , 3-hydroxyoctanoate (3HO) , 3-hydroxydecanoate (3HD) , or combinations thereof; preferably the recurring unit derived from 3-hydroxybutyrate, 3-hydroxyhexanoate, 4-hydroxybutyrate or combinations thereof.
  7. The aqueous dispersion according to any one of the preceding claims, wherein the polyhydroxyalkanoate accounts for 5-50 wt%, preferably 15-35 wt%of the aqueous dispersion.
  8. The aqueous dispersion according to any one of the preceding claims, further comprising an additive; preferably, the additive accounts for 0.1-10 wt%of the aqueous dispersion; more preferably, the additive accounts for 0.1-5 wt%of the aqueous dispersion.
  9. Use of the aqueous dispersion according to any one of the preceding claims in the preparation of barrier coatings.
  10. A method of coating a substrate using the aqueous dispersion of any one of claims 1-8.
  11. The method according to claim 10, wherein the substrate comprises paper, cardboard, fiberboard, starch, glass, metal, organic foam, inorganic foam, polymer film, or combinations thereof.
  12. A coating prepared from the aqueous dispersion of any one of claims 1-8.
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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109152394A (en) * 2016-02-24 2019-01-04 寰科创新有限公司 Cellulosic materials and methods of making and using the same
CN110475832A (en) * 2017-03-31 2019-11-19 比密斯公司 Packaging and packaging films with differential barrier properties
CN113557267A (en) * 2019-01-02 2021-10-26 格兰生物科技知识产权控股有限责任公司 Nanocellulose-dispersion concentrates and masterbatches, methods of making and using the same, and nanocellulose-containing composites
CN115506174A (en) * 2022-09-23 2022-12-23 岳阳林纸股份有限公司 Plastic-free paper-based packaging material with high oxygen barrier rate and preparation method thereof
WO2023220337A1 (en) * 2022-05-12 2023-11-16 Wm. Wrigley Jr. Company Alternative fibers and micro-fibrillated cellulose coated packaging papers, and films and substrates
WO2023222625A1 (en) * 2022-05-16 2023-11-23 Société des Produits Nestlé S.A. A marine biodegradable and recyclable paper-based packaging material with high moisture and oxygen barrier properties
CN117622704A (en) * 2022-08-25 2024-03-01 克朗斯股份公司 Container comprising fibers and method of coating a container
CN117730117A (en) * 2021-02-01 2024-03-19 陈大仁 Methods and systems for fibrillated cellulose composites blended with polymers
WO2024134456A1 (en) * 2022-12-22 2024-06-27 Stora Enso Oyj A method for manufacturing a pha coated fiber-based substrate with a first and a second pha aqueous coating compositions and a fiber-based substrate coated with the method
US20240344272A1 (en) * 2023-03-31 2024-10-17 Kemira Oyj Biowax polyhydroxyalkanoate dispersions as bio-based barrier coatings

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109152394A (en) * 2016-02-24 2019-01-04 寰科创新有限公司 Cellulosic materials and methods of making and using the same
CN110475832A (en) * 2017-03-31 2019-11-19 比密斯公司 Packaging and packaging films with differential barrier properties
CN113557267A (en) * 2019-01-02 2021-10-26 格兰生物科技知识产权控股有限责任公司 Nanocellulose-dispersion concentrates and masterbatches, methods of making and using the same, and nanocellulose-containing composites
CN117730117A (en) * 2021-02-01 2024-03-19 陈大仁 Methods and systems for fibrillated cellulose composites blended with polymers
WO2023220337A1 (en) * 2022-05-12 2023-11-16 Wm. Wrigley Jr. Company Alternative fibers and micro-fibrillated cellulose coated packaging papers, and films and substrates
WO2023222625A1 (en) * 2022-05-16 2023-11-23 Société des Produits Nestlé S.A. A marine biodegradable and recyclable paper-based packaging material with high moisture and oxygen barrier properties
CN117622704A (en) * 2022-08-25 2024-03-01 克朗斯股份公司 Container comprising fibers and method of coating a container
CN115506174A (en) * 2022-09-23 2022-12-23 岳阳林纸股份有限公司 Plastic-free paper-based packaging material with high oxygen barrier rate and preparation method thereof
WO2024134456A1 (en) * 2022-12-22 2024-06-27 Stora Enso Oyj A method for manufacturing a pha coated fiber-based substrate with a first and a second pha aqueous coating compositions and a fiber-based substrate coated with the method
US20240344272A1 (en) * 2023-03-31 2024-10-17 Kemira Oyj Biowax polyhydroxyalkanoate dispersions as bio-based barrier coatings

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