CN116024848A - Coffee grounds pulp packaging material for packaging coffee and preparation method thereof - Google Patents
Coffee grounds pulp packaging material for packaging coffee and preparation method thereof Download PDFInfo
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- CN116024848A CN116024848A CN202310045864.4A CN202310045864A CN116024848A CN 116024848 A CN116024848 A CN 116024848A CN 202310045864 A CN202310045864 A CN 202310045864A CN 116024848 A CN116024848 A CN 116024848A
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- coffee grounds
- coffee
- calcium sulfate
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- pulp
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- 235000013353 coffee beverage Nutrition 0.000 title claims abstract description 166
- 239000005022 packaging material Substances 0.000 title claims abstract description 33
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 8
- 238000002360 preparation method Methods 0.000 title abstract description 32
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical class [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims abstract description 121
- 239000002994 raw material Substances 0.000 claims abstract description 34
- 229920000881 Modified starch Polymers 0.000 claims abstract description 26
- 239000004368 Modified starch Substances 0.000 claims abstract description 26
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 26
- 235000019426 modified starch Nutrition 0.000 claims abstract description 26
- 239000002002 slurry Substances 0.000 claims abstract description 24
- ZSZRUEAFVQITHH-UHFFFAOYSA-N 2-(2-methylprop-2-enoyloxy)ethyl 2-(trimethylazaniumyl)ethyl phosphate Chemical compound CC(=C)C(=O)OCCOP([O-])(=O)OCC[N+](C)(C)C ZSZRUEAFVQITHH-UHFFFAOYSA-N 0.000 claims abstract description 21
- ZUHZZVMEUAUWHY-UHFFFAOYSA-N n,n-dimethylpropan-1-amine Chemical compound CCCN(C)C ZUHZZVMEUAUWHY-UHFFFAOYSA-N 0.000 claims abstract description 13
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims abstract description 12
- CCIVGXIOQKPBKL-UHFFFAOYSA-M ethanesulfonate Chemical compound CCS([O-])(=O)=O CCIVGXIOQKPBKL-UHFFFAOYSA-M 0.000 claims abstract description 12
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 11
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 8
- 238000000465 moulding Methods 0.000 claims abstract description 7
- 238000012856 packing Methods 0.000 claims description 59
- 239000000463 material Substances 0.000 claims description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 238000003756 stirring Methods 0.000 claims description 31
- 238000002156 mixing Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 15
- 239000000835 fiber Substances 0.000 claims description 13
- 239000003999 initiator Substances 0.000 claims description 13
- 229910017053 inorganic salt Inorganic materials 0.000 claims description 13
- 230000014759 maintenance of location Effects 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 13
- 241000196324 Embryophyta Species 0.000 claims description 12
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 12
- 230000000977 initiatory effect Effects 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 12
- 239000010893 paper waste Substances 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 8
- 229920002472 Starch Polymers 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 238000004537 pulping Methods 0.000 claims description 7
- 239000008107 starch Substances 0.000 claims description 7
- 235000019698 starch Nutrition 0.000 claims description 7
- 239000000725 suspension Substances 0.000 claims description 7
- 241000209140 Triticum Species 0.000 claims description 6
- 235000021307 Triticum Nutrition 0.000 claims description 6
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 229920002401 polyacrylamide Polymers 0.000 claims description 6
- 239000010902 straw Substances 0.000 claims description 6
- 239000003995 emulsifying agent Substances 0.000 claims description 5
- 239000011734 sodium Substances 0.000 claims description 5
- 229910052708 sodium Inorganic materials 0.000 claims description 5
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 4
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 claims description 3
- 238000010009 beating Methods 0.000 claims description 3
- 239000013538 functional additive Substances 0.000 claims description 3
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims description 3
- 239000003242 anti bacterial agent Substances 0.000 claims description 2
- 239000003963 antioxidant agent Substances 0.000 claims description 2
- 230000003078 antioxidant effect Effects 0.000 claims description 2
- 239000002455 scale inhibitor Substances 0.000 claims description 2
- OOOGAQDBUWMTCS-UHFFFAOYSA-N C(=CCCCCCC)C(C(=O)O)CC(=O)O.[Na] Chemical compound C(=CCCCCCC)C(C(=O)O)CC(=O)O.[Na] OOOGAQDBUWMTCS-UHFFFAOYSA-N 0.000 claims 1
- 239000003814 drug Substances 0.000 claims 1
- 238000004064 recycling Methods 0.000 abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 2
- 229940095672 calcium sulfate Drugs 0.000 description 27
- 230000000052 comparative effect Effects 0.000 description 26
- 235000010215 titanium dioxide Nutrition 0.000 description 11
- QUSNBJAOOMFDIB-UHFFFAOYSA-N Ethylamine Chemical compound CCN QUSNBJAOOMFDIB-UHFFFAOYSA-N 0.000 description 10
- 241000533293 Sesbania emerus Species 0.000 description 5
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000004078 waterproofing Methods 0.000 description 4
- 235000021539 instant coffee Nutrition 0.000 description 3
- 239000000123 paper Substances 0.000 description 3
- 239000011087 paperboard Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 229920001131 Pulp (paper) Polymers 0.000 description 2
- -1 amine ethyl methacrylate Chemical class 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- JKNCOURZONDCGV-UHFFFAOYSA-N 2-(dimethylamino)ethyl 2-methylprop-2-enoate Chemical compound CN(C)CCOC(=O)C(C)=C JKNCOURZONDCGV-UHFFFAOYSA-N 0.000 description 1
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical group OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 229940095564 anhydrous calcium sulfate Drugs 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- SUPCQIBBMFXVTL-UHFFFAOYSA-N ethyl 2-methylprop-2-enoate Chemical compound CCOC(=O)C(C)=C SUPCQIBBMFXVTL-UHFFFAOYSA-N 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003895 organic fertilizer Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920000747 poly(lactic acid) Polymers 0.000 description 1
- 239000004626 polylactic acid Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 description 1
- 229920000053 polysorbate 80 Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- XDLYMKFUPYZCMA-UHFFFAOYSA-M sodium;4-oct-1-enoxy-4-oxobutanoate Chemical compound [Na+].CCCCCCC=COC(=O)CCC([O-])=O XDLYMKFUPYZCMA-UHFFFAOYSA-M 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid group Chemical group S(O)(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000001038 titanium pigment Substances 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Landscapes
- Paper (AREA)
Abstract
The application relates to the technical field of coffee grounds recycling, and particularly discloses a coffee grounds pulp packaging material for packaging coffee and a preparation method thereof, wherein the coffee grounds pulp packaging material is mainly prepared from the following raw materials in parts by weight: 2000 parts of slurry, 15-25 parts of coffee grounds, 1-3 parts of titanium dioxide, 4-6 parts of hydrophilic modified starch, 14-16 parts of modified calcium sulfate whisker and 1-3 parts of functional auxiliary agent; the modified calcium sulfate whisker is obtained by treating calcium sulfate whisker with methacrylic acid dimethyl propyl amine ethyl sulfonate and 2-methacryloyloxyethyl phosphorylcholine. And recycling the coffee grounds to produce the coffee grounds pulp packaging material. The coffee grounds pulp packaging material not only has good mechanical properties, but also is used in the molding and outer package of coffee, so that the coffee grounds participate in the carbon footprint circulation of enterprises, namely, the recovery of the coffee grounds is converted into a part of the internal circulation of the enterprises, the resources are saved, the waste is reduced, and the recycling of raw materials is realized.
Description
Technical Field
The application relates to the technical field of coffee grounds recycling, in particular to a coffee grounds pulp packaging material for coffee packaging and a preparation method thereof.
Background
Along with the development of society and continuous communication of domestic and foreign cultures, coffee gradually enters the daily life of people, in particular instant coffee. China also starts developing the planting of coffee beans, and the planting area and yield are continuously increased. However, in the process of processing coffee beans into instant coffee, the utilization rate of the coffee beans is low, for example, 0.9kg of coffee grounds are produced simultaneously for every 1kg of instant coffee, and if the coffee grounds are directly filled, the waste of resources is definitely caused. In order to realize recycling of the coffee grounds and achieve the aim of saving resources, part of researchers take the coffee grounds as one of raw materials to prepare the coffee grounds active carbon, the coffee grounds organic fertilizer and the coffee grounds polylactic acid, however, the obtained coffee grounds products can only be used for external sales and cannot be self-produced and self-sold, namely, the coffee grounds cannot be recycled and converted into part of internal circulation of enterprises, and the raw material recycling rate is improved.
Disclosure of Invention
In order to recycle and convert the coffee grounds into a part of circulation in an enterprise and realize the effects of recycling raw materials and self-production and self-sales, the application provides a coffee grounds pulp packaging material for packaging coffee and a preparation method thereof.
In a first aspect, the present application provides a coffee grounds pulp packing material for coffee packing, which adopts the following technical scheme:
the coffee grounds pulp packaging material for packaging coffee is mainly prepared from the following raw materials in parts by weight: 2000 parts of slurry, 15-25 parts of coffee grounds, 1-3 parts of titanium dioxide, 4-6 parts of hydrophilic modified starch, 14-16 parts of modified calcium sulfate whisker and 1-3 parts of functional auxiliary agent;
the modified calcium sulfate whisker is obtained by treating calcium sulfate whisker with methacrylic acid dimethyl propyl amine ethyl sulfonate and 2-methacryloyloxyethyl phosphorylcholine.
The coffee beans are processed to produce coffee, and the byproduct coffee grounds replace part of pulp, and are used for producing coffee grounds pulp packaging materials which are used in the molding outer package of the coffee, so that the self-production and self-sales of the coffee grounds pulp packaging materials are realized, namely, the recovery of the coffee grounds is converted into part of the internal circulation of enterprises, the resources are saved, and the utilization rate of raw materials is improved.
On the basis, the applicant adds coffee grounds into the raw materials, and the recycling and the internal circulation of the coffee grounds are realized, but the ISO whiteness of the coffee grounds pulp packaging material is reduced, at the moment, titanium dioxide and modified calcium sulfate whisker are synchronously added, so that the titanium dioxide and the modified calcium sulfate whisker have the whitening characteristic, and the influence of the coffee grounds on the whiteness of the coffee grounds pulp packaging material is compensated. Meanwhile, the strength of the coffee grounds pulp packaging material is reduced by adding the coffee grounds, and at the moment, hydrophilic modified starch and modified calcium sulfate whisker are synchronously added, so that the hydrophilic modified starch plays a role in bonding, and the bonding strength between fibers is enhanced. The modified calcium sulfate whisker is a fibrous crystal, has the advantages of high strength and high modulus, and contains sulfuric acid groups, phosphoric acid groups and quaternary amine groups on the surface after the calcium sulfate whisker is treated by the methacrylic acid dimethyl propyl amine ethyl sulfonate and the 2-methacryloyloxyethyl phosphorylcholine, so that the dispersibility of the calcium sulfate whisker is greatly improved, the water solubility of the calcium sulfate whisker is reduced, and the compression resistance index, the tensile index and the tearing index of the coffee grounds pulp packaging material are enhanced. In the application, the compressive index is more than 52N.m through the synergistic effect between the hydrophilic modified starch and the modified calcium sulfate whisker 2 /g, tensile index > 45N.m/g, tear index > 15mN.m 2 And/g, the influence of the coffee grounds on the strength is made up, even the strength is increased, the mechanical property of the coffee grounds pulp packaging material is improved, the good comprehensive performance is shown, and the internal circulation requirement of enterprises is met.
Further, the coffee grounds have an average particle size of 1-10 μm. Preferably, the coffee grounds have an average particle size of 2-6 μm. In one embodiment, the average particle size of the coffee grounds is 5 μm, which may also be adjusted to 1 μm, 2 μm, 6 μm, 10 μm, etc., as desired.
Optionally, the modified calcium sulfate whisker is prepared by the following method:
sa, adding methacrylic acid dimethyl propyl amine ethyl sulfonate and 2-methacryloyloxyethyl phosphorylcholine into water, and stirring and mixing to obtain a premix;
sb, adding an inorganic salt initiator into water, and stirring and mixing to obtain an initiating liquid;
sc, adding calcium sulfate whisker into water, and performing ultrasonic dispersion to obtain calcium sulfate whisker suspension;
sd, adding the premixed solution into the calcium sulfate whisker suspension, stirring and mixing, then dripping the initiating solution, after dripping the initiating solution within 2 hours, stirring for 18-22 hours, filtering and drying to constant weight to obtain the modified calcium sulfate whisker;
wherein the weight ratio of the calcium sulfate whisker to the methacrylic acid dimethyl propyl amine ethyl sulfonate to the 2-methacryloyloxyethyl phosphorylcholine to the inorganic salt initiator is 15 (1-3) (0.1-0.3).
Dispersing calcium sulfate whisker in water to form calcium sulfate whisker suspension, and then adding a premix formed by the methacrylic acid dimethyl propyl amine ethyl sulfonate, the 2-methacryloyloxyethyl phosphorylcholine and the water to effectively increase the mixing uniformity of the calcium sulfate whisker, the methacrylic acid dimethyl propyl amine ethyl sulfonate and the 2-methacryloyloxyethyl phosphorylcholine. Then, an inorganic salt initiator and an initiating liquid formed by water are added dropwise, so that the mixing uniformity is improved, and the polymerization reaction of the methacrylic acid dimethyl propyl amine ethyl sulfonate and the 2-methacryloyloxyethyl phosphorylcholine is carried out on the surface of the calcium sulfate whisker to form a polymer, thereby facilitating the preparation of the modified calcium sulfate whisker and further enhancing the use effect of the modified calcium sulfate whisker.
In step Sa, the weight ratio of water to the ethyl amine methacrylate is (30-50): 1-3. In one embodiment, the weight ratio of water to the ethyl amine methacrylate is 20:1, which can also be adjusted to 10:1, 50:1, etc. as required.
In the step Sb, the weight ratio of the water to the inorganic salt initiator is (5-15) and is (0.1-0.3). In one embodiment, the weight ratio of the water to the inorganic salt initiator is 5:0.1, which can also be adjusted to 5:0.3, 15:0.1, etc. as required.
In the step Sc, the weight ratio of the water to the calcium sulfate whisker is (8-12): 3. In one embodiment, the weight ratio of water to calcium sulfate whiskers is 10:3, which can also be adjusted to 8:3, 12:3, etc. as required.
Optionally, the calcium sulfate whisker has an average diameter of 1-4 μm and an average length of 40-80 μm.
Optionally, the inorganic salt initiator is one or more of ammonium persulfate, potassium persulfate and sodium persulfate. Preferably, the inorganic salt initiator is ammonium persulfate.
Ammonium persulfate, potassium persulfate and sodium persulfate are all inorganic salts, can play a role in initiating, and are easy to obtain and cheap in raw materials.
Optionally, the slurry is mainly prepared from the following raw materials in parts by weight: 2000 parts of water, 50-60 parts of plant fiber, 40-50 parts of recycled waste paper and 1-3 parts of retention aid, and the beating degree of the slurry is 50-55 DEG SR.
By adopting the technical scheme, the preparation of the slurry is convenient, part of plant fibers are replaced by recycled waste paper, the recycling of the waste paper is realized, and the cost is reduced. Meanwhile, the degree of beating of the slurry can be optimized, so that the slurry can keep good drainage property, and the comprehensive performance of the coffee grounds pulp packaging material is improved.
In one embodiment, the slurry is made up of essentially the following raw materials in parts by weight: 2000 parts of water, 55 parts of plant fiber, 45 parts of recycled waste paper and 2 parts of retention aid. It can also be adjusted as required: 2000 parts of water, 50 parts of plant fiber, 40 parts of recycled waste paper and 1 part of retention aid; or 2000 parts of water, 60 parts of plant fiber, 50 parts of recycled waste paper, 3 parts of retention aid and the like.
Optionally, the plant fiber is wheat and straw, and the weight ratio of the wheat to the straw is 1 (0.3-0.5).
Optionally, the retention aid is polyacrylamide.
When the slurry is filtered, the polyacrylamide can flocculate particles, reduce filtering, improve the dehydration property and retention rate of the paper pulp, and further improve the dehydration property, retention rate and quality of the coffee grounds paper pulp packaging material.
Optionally, the slurry is prepared by the following method: and (3) stirring and mixing plant fibers and recycled waste paper, crushing to obtain particles, adding water and retention aid into the particles, stirring and mixing, pulping, and pulping to obtain the pulp.
By adopting the technical scheme, the preparation of the slurry is facilitated.
Optionally, the hydrophilic modified starch is one or more of sodium carboxymethyl starch, sodium carboxyethyl starch and sodium octenyl succinate starch, and/or the functional auxiliary agent is one or more of an antibacterial agent, a waterproof agent, an oil-proof agent, an antioxidant, an emulsifying agent and a scale inhibitor.
The hydrophilic modified starch is optimized, so that the hydrophilic modified starch is convenient to select. The selection of the functional auxiliary agents is optimized to increase the antibacterial property, the water resistance, the oil resistance and the like of the coffee grounds pulp packaging material.
In a second aspect, the present application provides a method for preparing a coffee grounds pulp packing material for packaging coffee, which adopts the following technical scheme:
the preparation method of the coffee grounds pulp packing material for coffee package comprises the following steps:
s1, adding hydrophilic modified starch and functional additives into slurry, stirring and mixing, then adding modified calcium sulfate whiskers, stirring and mixing, then adding coffee grounds and titanium dioxide, and stirring and mixing to obtain a mixture;
s2, filtering and molding the mixture to obtain a wet blank;
s3, carrying out hot press shaping on the wet blank, drying to constant weight, and trimming to obtain the coffee grounds pulp packaging material.
By adopting the technical scheme, the preparation of the coffee grounds pulp packaging material is facilitated.
In summary, the present application has at least the following beneficial effects:
1. after coffee beans are processed to produce coffee, the byproduct coffee grounds are recycled and replace part of pulp, and the pulp is used for producing coffee grounds pulp packaging materials which are also used in molding outer packages of coffee, so that the coffee grounds participate in the carbon footprint circulation of enterprises, resources are saved, the construction of power-assisted circular economy is realized, and industrial batch production and application are realized.
2. After the coffee grounds are added into the slurry, titanium dioxide and modified calcium sulfate whisker are synchronously added, so that the influence of the coffee grounds on the whiteness of the coffee grounds pulp packaging material is compensated. Meanwhile, hydrophilic modified starch and modified calcium sulfate whisker are synchronously added, the modified calcium sulfate whisker is obtained by treating calcium sulfate whisker with dimethyl propyl amine ethyl methacrylate and 2-methacryloyloxyethyl phosphorylcholine, and the coffee grounds pulp packaging material has good compression resistance index, tensile index and tearing index by the synergy between the modified starch and the modified calcium sulfate whisker, and the compression resistance index is more than 52N.m 2 /g, tensile index > 45N.m/g, tear index > 15mN.m 2 And/g, on the basis of compensating the influence of the coffee grounds on the strength of the coffee grounds pulp packaging material, the mechanical properties are further improved, and the good comprehensive properties are shown.
Detailed Description
In order that the present application may be more readily understood, the following examples are presented in conjunction with the following detailed description, which are intended to be illustrative only and are not intended to limit the scope of application of the present application. The starting materials or components used in the present application may be prepared by commercial or conventional methods unless specifically indicated.
Preparation example
Preparation example I-1
A modified calcium sulfate whisker, which is prepared by the following method:
sa, adding 40kg of water into a stirring tank a at the rotating speed of 500r/min, then adding 2kg of diethyl amine methacrylate and 2kg of 2-methacryloyloxyethyl phosphorylcholine, and stirring for 30min to obtain a premix.
Sb, adding 10kg of water into a stirring tank b at the rotating speed of 500r/min, then adding 0.2kg of ammonium persulfate inorganic salt initiator, and stirring for 10min to obtain an initiating liquid.
Under the condition of the ultrasonic frequency of 30KHz, adding 50kg of water into an ultrasonic stirring tank, then adding 15kg of calcium sulfate whisker, and performing ultrasonic dispersion for 20min to obtain a calcium sulfate whisker suspension.
Wherein the calcium sulfate whisker is anhydrous calcium sulfate whisker, and the average diameter of the calcium sulfate whisker is 3 mu m, and the average length of the calcium sulfate whisker is 60 mu m.
And Sd, adding the premix obtained in the step Sa into the calcium sulfate whisker suspension in the ultrasonic stirring tank of the step Sc at the rotating speed of 300r/min, and stirring for 10min. Then dripping the initiating liquid obtained in the step Sb, and finishing dripping the initiating liquid for 1.5 hours. And stirring for 20h after the dripping is finished. Then filtering is carried out, and the filtrate is discarded. And then drying the mixture to constant weight at the temperature of 95 ℃ to obtain the modified calcium sulfate whisker.
PREPARATION EXAMPLE I-2
A modified calcium sulfate whisker is different from preparation example I-1 in that in step S1, the addition amount of the amine ethyl methacrylate is 10kg, and the addition amount of the 2-methacryloyloxyethyl phosphorylcholine is 30kg.
Preparation example I-3
A modified calcium sulfate whisker is different from preparation example I-1 in that in step S1, the addition amount of the amine ethyl methacrylate is 30kg, and the addition amount of the 2-methacryloyloxyethyl phosphorylcholine is 10kg.
PREPARATION EXAMPLE I-4
A modified calcium sulfate whisker is different from the preparation example I-1 in that the preparation method is different, and the modified calcium sulfate whisker is prepared by adopting the following method:
sa, adding 100kg of water into an ultrasonic stirring tank at an ultrasonic frequency of 30KHz, then adding 15kg of calcium sulfate whisker, and performing ultrasonic dispersion for 20min. Then, at a rotation speed of 500r/min, 2kg of diethyl amine methacrylate and 2kg of 2-methacryloyloxyethyl phosphorylcholine were added and stirred for 30min. Then, 0.2kg of ammonium persulfate inorganic salt initiator was added thereto and the mixture was stirred for 21.5 hours. Then filtering is carried out, and the filtrate is discarded. And then drying the mixture to constant weight at the temperature of 95 ℃ to obtain the modified calcium sulfate whisker.
Preparation example II-1
A slurry prepared by the method of:
55kg of plant fiber and 45kg of recycled waste paper are added into a mixing barrel, and the mixture is stirred for 30min. Then transferring the mixture into a crusher, crushing the mixture for 30 minutes to obtain the particles, wherein the 20-mesh screen allowance of the particles is 5%. Then 2000kg of water and 2kg of retention aid are added into the particles, and the mixture is stirred for 30min. Then transferring into a hydropulper, pulping for 30min, and then transferring into a disc mill, pulping until the pulping degree is 50 DEG SR, thus obtaining the pulp.
Wherein the plant fiber is wheat and straw, and the weight ratio of the wheat to the straw is 1:0.4; the recycled waste paper is waste corrugated board; the retention aid is polyacrylamide and is selected from Guangdong He environmental protection materials science and technology Co.
Preparation example II-2
A slurry was obtained, which was different from preparation II-1 in that, after transferring to a disc mill, until the freeness was 55℃SR.
Examples
TABLE 1 content of raw materials (Unit: kg) of coffee grounds pulp packing Material
| Examples | Example 1 | Example 2 | Example 3 |
| Sizing agent | 2000 | 2000 | 2000 |
| Coffee grounds | 20 | 15 | 25 |
| Titanium white powder | 2 | 1 | 3 |
| Hydrophilic modified starch | 5 | 6 | 4 |
| Modified calcium sulfate whisker | 15 | 16 | 14 |
| Functional auxiliary agent | 2 | 3 | 1 |
Example 1
A coffee grounds pulp packing material for coffee package has the raw materials with proportions shown in Table 1.
Wherein the average particle size of the coffee grounds is 5 μm; the titanium dioxide is anatase titanium dioxide MA-55 and is selected from Tianjin Maste technology Co., ltd; the hydrophilically modified starch is sodium carboxymethyl starch selected from Shandong Siyang Biotech.
The functional auxiliary agent is two kinds of waterproofing agents and emulsifying agents, the weight ratio of the waterproofing agents to the emulsifying agents is 1:1, the waterproofing agents are hydroxyethyl cellulose, and the waterproofing agents are selected from Shandong Tianfeng chemical engineering Co., ltd; the emulsifier is Tween 80 and is selected from Hamming Chemicals, inc.
The modified calcium sulfate whisker is prepared by adopting a preparation example I-1; the slurry was prepared using preparation example II-1.
A method for preparing a coffee grounds pulp packing material for coffee packing, comprising the steps of:
s1, adding slurry into a stirring tank c at the rotating speed of 300r/min, then adding hydrophilic modified starch and functional additives, and stirring for 30min. Then adding modified calcium sulfate whisker, stirring for 40min. And adding coffee grounds and titanium dioxide, and stirring for 60min to obtain the mixture.
S2, adding the mixture into a pulp molding machine, and performing water filtering molding to obtain a wet blank.
S3, hot-pressing and shaping the wet blank for 45S at the temperature of 90 ℃ and the pressure of 0.6 MPa. And then drying the coffee grounds at the temperature of 80 ℃ to constant weight, and trimming the coffee grounds and pulp packaging materials.
Example 2
A coffee grounds pulp packing material for coffee package is different from example 1 in that the raw material ratio of the coffee grounds pulp packing material is different and is shown in Table 1.
Example 3
A coffee grounds pulp packing material for coffee package is different from example 1 in that the raw material ratio of the coffee grounds pulp packing material is different and is shown in Table 1.
Example 4
A coffee grounds pulp packing material for coffee package is different from example 1 in that the source of modified calcium sulfate whisker in the raw material of the coffee grounds pulp packing material is different, and the modified calcium sulfate whisker is prepared by adopting a preparation example I-2.
Example 5
A coffee grounds pulp packing material for coffee package is different from example 1 in that the source of modified calcium sulfate whisker in the raw material of the coffee grounds pulp packing material is different, and the modified calcium sulfate whisker is prepared by adopting a preparation example I-3.
Example 6
A coffee grounds pulp packing material for coffee package is different from example 1 in that the source of modified calcium sulfate whisker in the raw material of the coffee grounds pulp packing material is different, and the modified calcium sulfate whisker is prepared by adopting a preparation example I-4.
Example 7
A coffee grounds pulp packing material for coffee package is different from example 1 in that the source of slurry is different in the raw materials of the coffee grounds pulp packing material, and the slurry is prepared by using preparation example II-2.
Comparative example
Comparative example 1
A coffee grounds pulp packing material for coffee packing, which is different from example 1 in that no coffee grounds, titanium white powder, hydrophilically modified starch, modified calcium sulfate whisker are added to the raw materials of the coffee grounds pulp packing material.
Comparative example 2
A coffee grounds pulp packing material for coffee package is different from example 1 in that titanium white powder, hydrophilic modified starch and modified calcium sulfate whisker are not added into the raw materials of the coffee grounds pulp packing material.
Comparative example 3
A coffee grounds pulp packing material for coffee package is different from example 1 in that hydrophilic modified starch and modified calcium sulfate whisker are not added to the raw materials of the coffee grounds pulp packing material.
Comparative example 4
A coffee grounds pulp packing material for coffee package, which is different from example 1 in that the modified calcium sulfate whisker is replaced with the same amount of hydrophilic modified starch in the raw material of the coffee grounds pulp packing material.
Comparative example 5
A coffee grounds pulp packing material for coffee package, which is different from example 1 in that hydrophilic modified starch is replaced with an equal amount of modified calcium sulfate whisker in the raw material of the coffee grounds pulp packing material.
Comparative example 6
A coffee grounds pulp packing material for coffee package, which is different from example 1 in that the modified calcium sulfate whisker is replaced with an equivalent amount of calcium sulfate whisker in the raw material of the coffee grounds pulp packing material.
Comparative example 7
A coffee grounds pulp packing material for coffee package, which is different from example 1 in that 2-methacryloyloxyethyl phosphorylcholine is replaced with an equivalent amount of dimethylaminoethyl methacrylate in step S1 of the modified calcium sulfate whisker preparation method.
Comparative example 8
A coffee grounds pulp packing material for coffee package, which is different from example 1 in that in step S1 of the modified calcium sulfate whisker preparation method, the ethyl amine methacrylate is replaced with an equivalent amount of 2-methacryloyloxyethyl phosphorylcholine.
Comparative example 9
A coffee grounds pulp packing material for coffee package is different from example 1 in that in step S1 of the modified calcium sulfate whisker preparation method, an equal amount of polyacrylamide is used to replace ethyl amine methacrylate and 2-methacryloyloxyethyl phosphorylcholine, and polyacrylamide is selected from Guangdong Cynance environmental protection materials science and technology Co.
Performance detection
The coffee grounds pulp packing materials obtained in examples 1 to 7 and comparative examples 1 to 9 were taken as test pieces, respectively, and the following performance tests were conducted on the test pieces, and the test results are shown in Table 2.
The whiteness of the sample ISO is measured according to ISO2470-1999 method for measuring the diffuse reflectance factor of blue light (ISO brightness) of paper, paperboard and pulp.
According to BBT0045-2007 "pulp molded article industry package", the compressive resistance of a specimen was measured at a specimen deformation of 25mm, and the compressive resistance index was calculated, compressive resistance index=compressive resistance/basis weight.
The tensile index of the test specimens was tested according to GB/T12914-2008 determination of tensile Strength of paper and paperboard.
The tear index of the test specimens was determined according to GB/T455-2002 determination of paper and paperboard tear.
TABLE 2 detection results
As can be seen from Table 2, the coffee grounds pulp packaging material of the present application has a higher ISO whiteness of 76.74-78.33%, and also has a higher compression resistance index, tensile index, tear index, compression resistance index of 52.33-63.24N.m 2 Per g, tensile index of 45.22-53.22N.m/g, tear index of 15.47-21.48mN.m 2 And/g, so that the coffee grounds pulp packaging material shows excellent mechanical properties and meets the market demand.
Comparative examples 1 to 3 were compared and are based on comparative example 1. Comparative example 2 in comparison with comparative example 1, coffee grounds were added to the raw material of the coffee grounds pulp packing material; comparative example 3 in comparison with comparative example 1, the coffee grounds and titanium pigment were added to the raw materials of the coffee grounds pulp packing material. Therefore, the addition of the coffee grounds in the raw materials reduces the ISO whiteness, and the synchronous addition of the titanium dioxide effectively compensates the influence of the coffee grounds on the ISO whiteness.
Example 1 and comparative example 1, comparative examples 4-5 were compared and are based on comparative example 1. Comparative example 4 compared to comparative example 1, the raw material of the coffee grounds pulp packing material was added with hydrophilically modified starch; comparative example 5 in contrast to comparative example 1, modified calcium sulfate whisker was added to the raw material of the coffee grounds pulp packaging material; example 1 in contrast to comparative example 1, hydrophilic modified starch and modified calcium sulfate whisker were added to the raw materials of the coffee grounds pulp packaging material. Therefore, the raw materials are added with the hydrophilic modified starch and the modified calcium sulfate whisker, and the compressive index, the tensile index and the tearing index of the coffee grounds pulp packaging material are obviously improved through the synergistic effect between the hydrophilic modified starch and the modified calcium sulfate whisker.
Comparing example 1 with comparative examples 6-9, it can be seen that in the preparation of the modified calcium sulfate whisker, the calcium sulfate whisker is treated by adopting the ethyl amine methacrylate and the 2-methacryloyloxyethyl phosphorylcholine, so that the use effect of the calcium sulfate whisker is greatly improved. In combination with example 6, the pre-mixed solution of the methacrylic acid dimethyl propyl amine ethyl sulfonate, the 2-methacryloyloxyethyl phosphorylcholine and the water is prepared in advance, and the initiating solution of the inorganic salt initiator and the water is prepared in advance, so that the use effect of the calcium sulfate whisker and the mechanical property of the coffee grounds pulp packaging material can be further improved.
It should be noted that the above-described embodiments are only for explaining the present application, and do not constitute any limitation to the present application. The present application has been described with reference to exemplary embodiments, but it is understood that the words which have been used are words of description and illustration, rather than words of limitation. Modifications may be made to the present application as defined within the scope of the claims of the present application, and the invention may be modified without departing from the scope and spirit of the present application. Although the present application is described herein with reference to particular methods, materials and embodiments, the present application is not intended to be limited to the particular examples disclosed herein, but rather, the present application is intended to extend to all other methods and applications having the same functionality.
Claims (10)
1. A coffee grounds pulp packing material for coffee packaging, characterized by: the traditional Chinese medicine is mainly prepared from the following raw materials in parts by weight: 2000 parts of slurry, 15-25 parts of coffee grounds, 1-3 parts of titanium dioxide, 4-6 parts of hydrophilic modified starch, 14-16 parts of modified calcium sulfate whisker and 1-3 parts of functional auxiliary agent;
the modified calcium sulfate whisker is obtained by treating calcium sulfate whisker with methacrylic acid dimethyl propyl amine ethyl sulfonate and 2-methacryloyloxyethyl phosphorylcholine.
2. A coffee grounds pulp packing material for coffee packing as recited in claim 1, wherein: the modified calcium sulfate whisker is prepared by the following method:
sa, adding methacrylic acid dimethyl propyl amine ethyl sulfonate and 2-methacryloyloxyethyl phosphorylcholine into water, and stirring and mixing to obtain a premix;
sb, adding an inorganic salt initiator into water, and stirring and mixing to obtain an initiating liquid;
sc, adding calcium sulfate whisker into water, and performing ultrasonic dispersion to obtain calcium sulfate whisker suspension;
sd, adding the premixed solution into the calcium sulfate whisker suspension, stirring and mixing, then dripping the initiating solution, after dripping the initiating solution within 2 hours, stirring for 18-22 hours, filtering and drying to constant weight to obtain the modified calcium sulfate whisker;
wherein the weight ratio of the calcium sulfate whisker to the methacrylic acid dimethyl propyl amine ethyl sulfonate to the 2-methacryloyloxyethyl phosphorylcholine to the inorganic salt initiator is 15 (1-3) (0.1-0.3).
3. A coffee grounds pulp packing material for coffee packing as recited in claim 2, wherein: the average diameter of the calcium sulfate whisker is 1-4 mu m, and the average length is 40-80 mu m.
4. A coffee grounds pulp packing material for coffee packing as recited in claim 2, wherein: the inorganic salt initiator is one or more of ammonium persulfate, potassium persulfate and sodium persulfate.
5. A coffee grounds pulp packing material for coffee packing as recited in claim 1, wherein: the slurry is mainly prepared from the following raw materials in parts by weight: 2000 parts of water, 50-60 parts of plant fiber, 40-50 parts of recycled waste paper and 1-3 parts of retention aid, and the beating degree of the slurry is 50-55 DEG SR.
6. A coffee grounds pulp packing material for coffee packing as recited in claim 5, wherein: the plant fiber is made of wheat and straw, and the weight ratio of the wheat to the straw is 1 (0.3-0.5).
7. A coffee grounds pulp packing material for coffee packing as recited in claim 5, wherein: the retention aid is polyacrylamide.
8. A coffee grounds pulp packing material for coffee packing as recited in claim 5, wherein: the slurry is prepared by the following method: and (3) stirring and mixing plant fibers and recycled waste paper, crushing to obtain particles, adding water and retention aid into the particles, stirring and mixing, pulping, and pulping to obtain the pulp.
9. A coffee grounds pulp packing material for coffee packing as recited in claim 1, wherein: the hydrophilic modified starch is one or more of sodium carboxymethyl starch, sodium carboxyethyl starch and sodium octenyl succinic acid starch, and/or,
the functional auxiliary agent is one or more of an antibacterial agent, a waterproof agent, an oil-proof agent, an antioxidant, an emulsifying agent and a scale inhibitor.
10. A method for preparing a coffee grounds pulp packing material for coffee packing as recited in any one of claims 1-9, characterized in that: the method comprises the following steps:
s1, adding hydrophilic modified starch and functional additives into slurry, stirring and mixing, then adding modified calcium sulfate whiskers, stirring and mixing, then adding coffee grounds and titanium dioxide, and stirring and mixing to obtain a mixture;
s2, filtering and molding the mixture to obtain a wet blank;
s3, carrying out hot press shaping on the wet blank, drying to constant weight, and trimming to obtain the coffee grounds pulp packaging material.
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