CN115584061A - Modified hemp stalk core powder, composite cat litter and preparation method thereof - Google Patents
Modified hemp stalk core powder, composite cat litter and preparation method thereof Download PDFInfo
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- CN115584061A CN115584061A CN202211303255.6A CN202211303255A CN115584061A CN 115584061 A CN115584061 A CN 115584061A CN 202211303255 A CN202211303255 A CN 202211303255A CN 115584061 A CN115584061 A CN 115584061A
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- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 title claims abstract description 121
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 title claims abstract description 121
- 235000009120 camo Nutrition 0.000 title claims abstract description 121
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- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 239000002131 composite material Substances 0.000 title claims abstract description 17
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 18
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- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000002156 mixing Methods 0.000 claims abstract description 18
- 239000002245 particle Substances 0.000 claims abstract description 18
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- 239000000665 guar gum Substances 0.000 claims abstract description 17
- 229960002154 guar gum Drugs 0.000 claims abstract description 17
- 239000007822 coupling agent Substances 0.000 claims abstract description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 40
- 239000000203 mixture Substances 0.000 claims description 26
- 238000003756 stirring Methods 0.000 claims description 25
- 239000000243 solution Substances 0.000 claims description 21
- 239000002994 raw material Substances 0.000 claims description 20
- 239000011259 mixed solution Substances 0.000 claims description 19
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 16
- 238000000151 deposition Methods 0.000 claims description 15
- 229920002261 Corn starch Polymers 0.000 claims description 14
- 239000008120 corn starch Substances 0.000 claims description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 12
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 11
- 238000005406 washing Methods 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 9
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 8
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 230000001476 alcoholic effect Effects 0.000 claims description 4
- YHWCPXVTRSHPNY-UHFFFAOYSA-N butan-1-olate;titanium(4+) Chemical compound [Ti+4].CCCC[O-].CCCC[O-].CCCC[O-].CCCC[O-] YHWCPXVTRSHPNY-UHFFFAOYSA-N 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 4
- 229910021641 deionized water Inorganic materials 0.000 claims description 4
- FLKPEMZONWLCSK-UHFFFAOYSA-N diethyl phthalate Chemical compound CCOC(=O)C1=CC=CC=C1C(=O)OCC FLKPEMZONWLCSK-UHFFFAOYSA-N 0.000 claims description 4
- JMXKSZRRTHPKDL-UHFFFAOYSA-N titanium ethoxide Chemical compound [Ti+4].CC[O-].CC[O-].CC[O-].CC[O-] JMXKSZRRTHPKDL-UHFFFAOYSA-N 0.000 claims description 4
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 3
- 229960000583 acetic acid Drugs 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000012362 glacial acetic acid Substances 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 2
- 239000000920 calcium hydroxide Substances 0.000 claims description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 2
- 238000004132 cross linking Methods 0.000 claims description 2
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical group O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 claims description 2
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 2
- LUMVCLJFHCTMCV-UHFFFAOYSA-M potassium;hydroxide;hydrate Chemical compound O.[OH-].[K+] LUMVCLJFHCTMCV-UHFFFAOYSA-M 0.000 claims description 2
- 229940080314 sodium bentonite Drugs 0.000 claims description 2
- 229910000280 sodium bentonite Inorganic materials 0.000 claims description 2
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 2
- 238000010521 absorption reaction Methods 0.000 abstract description 19
- 230000000844 anti-bacterial effect Effects 0.000 abstract description 17
- 239000002250 absorbent Substances 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 13
- 239000002699 waste material Substances 0.000 abstract description 6
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- 239000000835 fiber Substances 0.000 description 3
- 210000002700 urine Anatomy 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 235000013527 bean curd Nutrition 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
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- 229910002027 silica gel Inorganic materials 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 244000046052 Phaseolus vulgaris Species 0.000 description 1
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 1
- 230000006750 UV protection Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
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- 230000008569 process Effects 0.000 description 1
- 230000004224 protection Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K1/00—Housing animals; Equipment therefor
- A01K1/015—Floor coverings, e.g. bedding-down sheets ; Stable floors
- A01K1/0152—Litter
- A01K1/0154—Litter comprising inorganic material
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K1/00—Housing animals; Equipment therefor
- A01K1/015—Floor coverings, e.g. bedding-down sheets ; Stable floors
- A01K1/0152—Litter
- A01K1/0155—Litter comprising organic material
-
- 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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/80—Food processing, e.g. use of renewable energies or variable speed drives in handling, conveying or stacking
- Y02P60/87—Re-use of by-products of food processing for fodder production
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- Health & Medical Sciences (AREA)
- Zoology (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
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- Inorganic Chemistry (AREA)
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Abstract
The invention belongs to the technical field of cat litter preparation, and particularly relates to modified hemp stalk core powder, composite cat litter and a preparation method thereof. The invention carries out alkali, titanate coupling agent and TiO on the waste hemp stalk cores 2 Chemical treatment such as in-situ depositionAnd then uniformly mixing the modified hemp stalk core powder with starch, calcium carbonate, nano bentonite, guar gum, xanthan gum, water-absorbent resin and the like according to a certain proportion, preparing cat litter particles, and drying to obtain the modified hemp stalk core powder composite cat litter. The invention deposits TiO on the surface of hemp stalk core powder 2 The defect of the microporous structure on the surface of the hemp stalk core powder can be made up, the filling effect of rigid particles is achieved, and meanwhile, the antibacterial performance of the cat litter is improved. The high water absorption of the hemp stalk core powder, the starch and the water-absorbent resin improves the adsorption effect of the cat litter, has good caking property, has good covering effect on cat excrement, and is convenient to clean.
Description
Technical Field
The invention belongs to the technical field of cat litter preparation, and particularly relates to modified hemp stalk core powder, composite cat litter and a preparation method thereof.
Background
Pet cats are animals that many people prefer to keep, and if they are excreted anywhere during the pet cat keeping process, this can cause significant pollution, and cat litter can be used to catch these excretions, which can be a good solution to this problem. The cat litter is mainly divided into agglomerated cat litter and non-agglomerated cat litter, wherein the non-agglomerated cat litter is inconvenient to clean and less in use. The caking cat litter has more types and applications, such as plant fiber cat litter, silica gel cat litter, crystal cat litter, wood chip cat litter, bentonite cat litter and the like, and can wrap cat urine rapidly to form a lump of cat urine, so that the cat urine is convenient to clean and the generation of foul smell can be reduced. However, in the preparation process, the cat litter can generate a lot of dust, the raw material acquisition difficulty is high, the cost is high, substances such as silica gel and crystal are harmful to people and cats, and the antibacterial property is not good.
Chinese patent CN111802258A provides a novel plant-agglomerated cat litter with good deodorization performance and a preparation method thereof, and the cat litter has good deodorization effect, good agglomeration performance and no antibacterial property. Chinese patent CN112889676A provides a hydrophilic modified plant fiber cat litter material and a preparation method thereof, which have good comprehensive performances such as water absorption, deodorization, comfort and the like, but do not consider the antibacterial performance of the cat litter.
Hemp crops are annual or perennial bast fibre crops and are very characteristic economic crops. The hemp straw has excellent antibacterial property, light weight, high strength, ultraviolet resistance, moisture absorption, environmental protection and other excellent characteristics, and simultaneously has excellent mechanical property, heat resistance, corrosion resistance and other properties, and the hemp straw core powder obtained from the hemp straw also has the same effect, and if the hemp straw core powder can be utilized, the hemp straw can exert the characteristics.
Chinese patent CN112931250A provides a natural hemp stalk bean curd cat litter, which has the characteristics of natural bacteriostasis and green and pollution-free, and the industrial hemp has better hydroscopicity, can improve the hydroscopicity of the cat litter, and the industrial hemp also has better deodorization effect, can replace the use of essence in the cat litter, and the misuse of the cat litter by pet cats does not affect the physical conditions, but the antibacterial effect of the cat litter disclosed by the patent is not enough.
Disclosure of Invention
In order to fully utilize the waste hemp stalk core powder and solve the problem of poor antibacterial performance of the prior cat litter, the invention mainly aims to carry out chemical modification treatment on the waste hemp stalk core powder and carry out nano TiO 2 Depositing on the surface of the hemp stalk core powder, and providing a preparation method of the modified hemp stalk core powder.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of modified hemp stalk core powder comprises the following steps:
(1) Ball-milling the hemp stem cores by a ball mill for 1-2h at the grinding speed of 400-600rpm, and sieving by a sieve of 80-200 meshes to obtain the hemp stem core powder with uniform particle size.
(2) And (2) uniformly mixing the hemp stalk core powder obtained in the step (1) with an alkali solution, stirring for 1-2h at 40-60 ℃ under a closed condition, then washing to be neutral with water, filtering, and drying (12-24 h in a 60-80 ℃ oven) to obtain the alkali-treated hemp stalk core powder.
The mass ratio of the hemp stalk core powder to the alkali solution is 1 (10-20); the alkali solution is one of sodium hydroxide, calcium hydroxide or potassium hydroxide water solution, and the mass percentage is 3-7%.
(3) Uniformly mixing the alkali-treated hemp stalk core powder obtained in the step (2) with an alcohol solution, then adding a titanate coupling agent accounting for 8-12% of the mass of the alkali-treated hemp stalk core powder, and stirring and reacting for 4-6 h under the sealed condition at 70-90 ℃; washing the mixture obtained by the reaction with water or ethanol, filtering (removing residual titanate coupling agent and the like), and drying (in a drying oven at 60-80 ℃ for 12-24 h) to obtain the hemp stalk core powder modified by the titanate coupling agent.
The mass ratio of the hemp stalk core powder treated by the alkali to the alcoholic solution is 1 (10-20), and the volume ratio of the alcohol to the water in the alcoholic solution is (3-5): 1.
the alcohol is at least one of ethanol, propanol, butanol and n-propanol; the titanate coupling agent is one of tetrabutyl titanate, triisostearoyl isopropyl titanate, isopropyl trititanate and diisostearoyl ethyl phthalate.
(4) Adding the titanate coupling agent modified hemp stalk core powder obtained in the step (3) into a certain amount of alcohol, then adding titanate with the volume of 20-30% of the alcohol, and stirring for 0.5-1h at 30-50 ℃ in a sealed environment to obtain a mixed solution A. Under the condition of stirring, mixing 80-120% of alcohol by volume in the mixed solution A, 40-60% of deionized water by volume in the mixed solution A, 8-15% of glacial acetic acid by volume in the mixed solution A and 3-8% of dilute hydrochloric acid by volume in the mixed solution A, and violently stirring for 5-10min at 30-50 ℃ to obtain mixed solution B; adding the mixed solution B into the mixed solution A, strongly stirring for 1-2h at 30-50 ℃, washing with water, filtering, and drying to obtain TiO 2 Depositing the modified hemp stalk core powder.
The alcohol is one of ethanol, propanol, butanol and n-propanol, and the mass ratio of the titanate coupling agent modified hemp stalk core powder to the alcohol solution is 1 (5-10); the titanate is one of tetraethyl titanate, isopropyl titanate and tetrabutyl titanate.
The invention also aims to provide the cat litter taking the modified hemp stalk core powder as the main raw material, which has excellent adsorbability, antibacterial property, caking property and deodorization property and is realized by the following technical scheme.
The modified hemp stalk core powder composite cat litter comprises the following raw materials in percentage by weight: 50-70% of modified hemp stalk core powder, 5-20% of starch, 1-5% of calcium carbonate, 1-5% of nano bentonite, 5-10% of guar gum, 5-10% of xanthan gum and 5-10% of water-absorbing resin.
Preferably, the modified hemp stalk core powder is titanate coupling agent modified hemp stalk core powder and TiO 2 Depositing one of the modified hemp stalk core powders.
Preferably, the starch is at least one of corn starch (Standard No. GB/T8885) and expanded starch (Standard No. Q/YGSP 0001S).
Preferably, the calcium carbonate is light calcium carbonate, the content of the calcium carbonate is more than 95 percent, and the calcium carbonate has a standard number GB1886.214-2016.
Preferably, the nano bentonite is sodium bentonite, and the mesh number is 200-400 meshes.
Preferably, the guar gum is food grade, safe and nontoxic, and has a molecular weight of 5w-80w.
Preferably, the xanthan gum is a high viscosity xanthan gum having a viscosity (1% KC1) mPa.s.gtoreq.1200 and a purity of > 99%.
Preferably, the water-absorbing resin is a powdery resin with the main chemical component of low-crosslinking sodium polyacrylate, the particle size is 100-120 meshes, and the content is more than 88%.
The preparation method of the modified hemp stalk core powder composite cat litter comprises the following steps: the raw materials are uniformly mixed according to a certain proportion, then prepared into particles, and dried to obtain the modified hemp stem core powder composite cat litter.
The mixing mode is that a high-speed mixer is adopted for mixing, the rotating speed is 300-500rpm, the stirring time is 10min-20min, and then the mixture is extruded and granulated by a cat litter granulator, and the diameter of the obtained granules is 0.2-0.5cm, and the length of the obtained granules is 0.4-0.8cm; the drying temperature is 60-80 ℃.
Compared with the prior art, the invention has the following advantages and effects:
(1) The invention deposits TiO on the surface of hemp stalk core powder 2 The defect of the microporous structure on the surface of the hemp stalk core powder can be made up, the filling effect of rigid particles is achieved, and meanwhile, the antibacterial performance of the cat litter is improved.
(2) The cat litter prepared by the invention improves the adsorption effect of the cat litter by means of the strong water absorbability of the hemp stalk core powder, the starch and the water-absorbent resin, has good caking property, has a good covering effect on cat excrement, and is convenient to clean.
Drawings
FIG. 1 shows unmodified hemp stalk core powder (HMP), alkali-treated hemp stalk core powder (NaOH-HMP) and TiO 2 Deposition modified hemp stalk core powder (TiO) 2 -HMP).
FIG. 2 is TiO 2 Scanning electron microscope images of the deposited modified hemp stalk core powder.
FIG. 3 is a graph of the effect of the caking property test.
Detailed Description
The present invention is described in further detail with reference to the following examples, but the embodiments of the present invention are not limited to these examples. The reagents used in the examples of the present invention are conventional raw materials or reagents unless otherwise specified, and the experimental methods used are conventional in the art unless otherwise specified.
Example 1
The preparation method of the cat litter with isopropyl trititanate modified hemp stalk core powder and expanded starch as main raw materials comprises the following steps:
(1) And (3) taking the waste hemp stem cores, carrying out ball milling for 2h by using a ball mill at the grinding speed of 600rpm, and sieving by using a 200-mesh sieve to obtain the hemp stem core powder with uniform particle size.
(2) Uniformly mixing the hemp stalk core powder obtained in the step (1) with a 5wt% NaOH solution, wherein the mass ratio of the hemp stalk core powder to the NaOH solution is 1:20. stirring the obtained mixture for 2h under a sealed condition at 40 ℃, then washing the mixture with water until the washing liquid is neutral, filtering the mixture, and drying the mixture in an oven at 80 ℃ for 24h to obtain alkali-treated hemp stalk core powder;
(3) Uniformly mixing the alkali-treated hemp stalk core powder obtained in the step (2) with an ethanol solution, wherein the mass ratio of the alkali-treated hemp stalk core powder to the ethanol solution is 1; then adding isopropyl trititanate which accounts for 8 percent of the mass of the hemp stalk core powder treated by alkali, and stirring and reacting for 4 hours under the sealing condition of 80 ℃; washing and filtering the mixture obtained by the reaction with ethanol to remove residual isopropyl trititanate, and drying in an oven at 80 ℃ for 24 hours to obtain isopropyl trititanate modified hemp stalk core powder;
(4) And (4) stirring the isopropyl trititanate modified hemp stalk core powder obtained in the step (3) with expanded starch, calcium carbonate, nano bentonite, guar gum, xanthan gum and water-absorbent resin for 10min by using a high-speed mixer, wherein the rotating speed of the high-speed mixer is 400rpm, and uniformly mixing to obtain the cat litter coarse mixture. The modified hemp stem core powder comprises, by mass, 60% of the cat litter composition, 20% of expanded starch, 2.5% of calcium carbonate, 2.5% of nano bentonite, 5% of guar gum, 5% of xanthan gum and 5% of water-absorbent resin.
(5) And (5) extruding and granulating the cat litter coarse mixture obtained in the step (4) by using a cat litter granulator, and drying to obtain the cat litter with uniform particle size. Wherein the drying temperature is 80 ℃, the diameter of the cat litter is 0.5cm, and the length of the cat litter is 0.6cm.
The odor, hardness, color, antibacterial effect, deodorizing property, water absorption rate, rapid water absorption time, caking property and dust-free rate of the cat litter prepared by the embodiment and using isopropyl trititanate modified hemp stalk core powder and expanded starch as main raw materials are shown in table 1.
Example 2
By TiO 2 The preparation method of the cat litter taking the deposition modified hemp stalk core powder and the expanded starch as main raw materials comprises the following steps:
(1) Referring to steps (1) to (3) in example 1, isopropyl trititanate-modified hemp stalk core powder was prepared.
(2) Adding the obtained isopropyl trititanate modified hemp stalk core powder into a certain amount of ethanol (isopropyl trititanate modified hemp stalk core powder: ethanol = 1; mixing 120% ethanol, 60% deionized water, 15% glacial acetic acid and 5% diluted hydrochloric acid under stirring, and stirring at 40 deg.C for 10min to obtain mixed solution B; then adding the mixed solution B into the mixed solution A, strongly stirring for 2 hours at 40 ℃, washing with deionized water, filtering, and drying to obtain TiO 2 Depositing the modified hemp stalk core powder.
(3) Using the TiO obtained in step (2) 2 Depositing the modified hemp stalk core powder, stirring the modified hemp stalk core powder, the expanded starch, the calcium carbonate, the nano bentonite, the guar gum, the xanthan gum and the water-absorbent resin for 10min by a high-speed mixer at the rotating speed of 400rpm, and uniformly mixing to obtain the cat litter coarse mixture. Wherein, tiO 2 The deposition modified hemp stalk core powder accounts for 65% of the mass of the cat litter composition, the expanded starch accounts for 15%, the calcium carbonate accounts for 2%, the nano bentonite accounts for 3%, the guar gum accounts for 6%, the xanthan gum accounts for 5%, and the water-absorbent resin accounts for 4%.
(4) And (4) extruding and granulating the cat litter coarse mixture obtained in the step (3) through a cat litter granulator, and drying to obtain cat litter with uniform particle size. Wherein the drying temperature is 80 ℃, the diameter of the cat litter is 0.5cm, and the length of the cat litter is 0.6cm.
TiO prepared in this example 2 The odor, hardness, color, antibacterial effect, deodorizing property, water absorption rate, rapid water absorption time, caking property and dust-free rate of the cat litter using the deposition-modified hemp stalk core powder and the expanded starch as main raw materials are shown in table 1.
Example 3
The preparation method of the cat litter taking isopropyl trititanate modified hemp stalk core powder and corn starch as main raw materials comprises the following steps:
(1) Referring to steps (1) to (3) in example 1, isopropyl trititanate modified hemp stalk core powder was prepared.
(2) And (3) stirring the obtained isopropyl trititanate modified hemp stalk core powder, corn starch, calcium carbonate, nano bentonite, guar gum, xanthan gum and water-absorbent resin for 10min by a high-speed mixer at the rotating speed of 400rpm, and uniformly mixing to obtain the cat litter coarse mixture. The modified hemp stalk core powder comprises 70% of the cat litter composition by mass, 10% of corn starch, 3% of calcium carbonate, 2% of nano bentonite, 4% of guar gum, 6% of xanthan gum and 5% of water-absorbent resin.
(3) And (3) extruding and granulating the cat litter coarse mixture obtained in the step (2) through a cat litter granulator, and then drying until the water content is lower than 5%. Wherein the drying temperature is 80 ℃, the diameter of the cat litter is 0.5cm, and the length of the cat litter is 0.6cm.
The odor, hardness, color, antibacterial effect, deodorizing property, water absorption rate, rapid water absorption time, caking property and dust-free rate of the cat litter prepared by the embodiment and using isopropyl trititanate modified hemp stalk core powder and corn starch as main raw materials are shown in table 1.
Example 4
By TiO 2 The preparation method of the cat litter taking the deposition modified hemp stalk core powder and the corn starch as main raw materials comprises the following steps:
(1) Referring to steps (1) to (2) of example 2, tiO was prepared 2 Depositing modified hemp stalk core powder;
(2) Using the resulting TiO 2 Depositing the modified hemp stalk core powder, stirring the modified hemp stalk core powder, corn starch, calcium carbonate, nano bentonite, guar gum, xanthan gum and water-absorbent resin for 10min by a high-speed mixer at the rotating speed of 400rpm, and uniformly mixing to obtain the cat litter coarse mixture. Wherein, tiO 2 The deposition modified hemp stalk core powder accounts for 60% of the mass of the cat litter composition, the corn starch accounts for 15%, the calcium carbonate accounts for 2.5%, the nano bentonite accounts for 2.5%, the guar gum accounts for 5%, the xanthan gum accounts for 7.5%, and the water-absorbent resin accounts for 7.5%.
(3) And (3) extruding and granulating the cat litter coarse mixture obtained in the step (2) through a cat litter granulator, and drying to obtain cat litter with uniform particle size. Wherein the drying temperature is 80 ℃, the diameter of the cat litter is 0.5cm, and the length of the cat litter is 0.6cm.
Prepared with TiO as described in this example 2 The odor, hardness, color, antibacterial effect, deodorizing property, water absorption rate, rapid water absorption time, caking property and dust-free rate of the cat litter using the deposition-modified hemp stalk core powder and the corn starch as main raw materials are shown in table 1.
Comparative example 1
A preparation method of cat litter taking untreated hemp stalk core powder and expanded starch as main raw materials comprises the following steps:
(1) And (3) taking the waste hemp stem cores, carrying out ball milling for 2 hours by using a ball mill at the grinding speed of 600rpm, and sieving by using a 200-mesh sieve to obtain hemp stem core powder with uniform particle size.
(2) And (2) stirring the hemp stalk core powder with uniform particle size obtained in the step (1) with the puffed starch, the calcium carbonate, the nano bentonite, the guar gum, the xanthan gum and the water-absorbent resin for 10min by a high-speed mixer at the rotating speed of 400rpm, and uniformly mixing to obtain the cat litter coarse mixture. Wherein, the untreated hemp stem core powder accounts for 60 percent of the mass of the cat litter composition, the expanded starch accounts for 20 percent, the calcium carbonate accounts for 2.5 percent, the nano bentonite accounts for 2.5 percent, the guar gum accounts for 5 percent, the xanthan gum accounts for 5 percent, and the water-absorbent resin accounts for 5 percent.
(3) And (3) extruding and granulating the cat litter coarse mixture obtained in the step (2) through a cat litter granulator, and drying to obtain the cat litter with uniform particle size. Wherein the drying temperature is 80 ℃, the diameter of the cat litter is 0.5cm, and the length of the cat litter is 0.6cm.
The odor, hardness, color, antibacterial effect, deodorizing property, water absorption rate, rapid water absorption time, caking property, and dust-free rate of the cat litter using the untreated hemp stalk core powder and the expanded starch prepared in the comparative example as main raw materials are shown in table 1.
Comparative example 2
The preparation method of the cat litter taking the untreated hemp stalk core powder and the corn starch as the main raw materials comprises the following steps:
(1) And (3) taking the waste hemp stem cores, carrying out ball milling for 2h by using a ball mill at the grinding speed of 600rpm, and sieving by using a 200-mesh sieve to obtain the hemp stem core powder with uniform particle size.
(2) And (2) stirring the hemp stalk core powder with uniform particle size obtained in the step (1), corn starch, calcium carbonate, nano bentonite, guar gum, xanthan gum and water-absorbent resin for 10min by a high-speed mixer at the rotating speed of 400rpm, and uniformly mixing to obtain the cat litter coarse mixture. Wherein, the untreated hemp stalk core powder accounts for 60 percent of the mass of the cat litter composition, the corn starch accounts for 15 percent, the calcium carbonate accounts for 2.5 percent, the nano bentonite accounts for 2.5 percent, the guar gum accounts for 5 percent, the xanthan gum accounts for 7.5 percent, and the water-absorbent resin accounts for 7.5 percent.
(3) And (3) extruding and granulating the cat litter coarse mixture obtained in the step (2) through a cat litter granulator, and drying to obtain cat litter with uniform particle size. Wherein the drying temperature is 80 ℃, the diameter of the cat litter is 0.5cm, and the length of the cat litter is 0.6cm.
The odor, hardness, color, antibacterial effect, deodorizing property, water absorption rate, rapid water absorption time, caking property, and dust-free rate of the cat litter using the untreated hemp stalk core powder and the corn starch prepared in this example as main raw materials are shown in table 1.
Comparative example 3
Commercially available cat litter is purchased, and the purchased cat litter is tofu cat litter which mainly comprises bean dregs and starch and has the purity of 99%. The odor, hardness, color, antibacterial effect, deodorizing property, water absorption rate, rapid water absorption time, caking property, dust-free rate were measured, and the results are shown in table 1.
Table 1 various properties and comparisons of modified hemp stalk core powder composite cat litters
The detection result shows that compared with cat litter sold in the market, the TiO prepared by the invention 2 The composite cat litter taking the deposition modified hemp stalk core powder or the isopropyl trititanate modified hemp stalk core powder as the main raw material has good antibacterial effect. The hemp stem core powder has the effects of quick deodorization and water absorption, so that the deodorization effect and the water absorption of the composite cat litter prepared by the invention are obviously improved, the hardness is higher, and the composite cat litter is not easy to break and generate dust. Compared with cat litter sold in the market, the composite cat litter prepared by the invention has a hemp fresh scent, and other properties also meet the requirements of cat litter.
The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Other variations are contemplated by those skilled in the art in view of the description of the invention and are intended to be within the scope of the invention.
Claims (10)
1. A preparation method of modified hemp stalk core powder is characterized by comprising the following steps:
(1) Uniformly mixing the hemp stalk core powder with an alkali solution, stirring for 1-2h at 40-60 ℃ under a closed condition, then washing with water to be neutral, filtering and drying to obtain alkali-treated hemp stalk core powder;
(2) Uniformly mixing the obtained alkali-treated hemp stalk core powder with an alcohol solution, then adding a titanate coupling agent accounting for 8-12% of the mass of the alkali-treated hemp stalk core powder, and stirring and reacting for 4-6 hours at 70-90 ℃ under a sealed condition; and washing the mixture obtained by the reaction with water or ethanol, filtering and drying to obtain the hemp stalk core powder modified by the titanate coupling agent.
2. The production method according to claim 1, characterized in that: the mass ratio of the hemp stalk core powder used in the step (1) to the alkali solution is 1 (10-20); the alkali solution is one of sodium hydroxide, calcium hydroxide or potassium hydroxide water solution, and the mass percentage is 3-7%.
3. The method of claim 1, wherein: the mass ratio of the alkali-treated hemp stalk core powder to the alcoholic solution used in the step (2) is 1 (10-20), and the volume ratio of alcohol to water in the alcoholic solution is (3-5): 1.
4. the production method according to claim 3, characterized in that: the alcohol in the step (2) is at least one of ethanol, propanol, butanol and n-propanol; the titanate coupling agent is one of tetrabutyl titanate, triisostearoyl isopropyl titanate, isopropyl trititanate and diisostearoyl ethyl phthalate.
5. The method of claim 1, further comprising the steps of:
(3) Adding the obtained titanate coupling agent modified hemp stalk core powder into a certain amount of alcohol, then adding titanate with the volume of 20-30% of the volume of the alcohol, and stirring for 0.5-1h at 30-50 ℃ in a sealed environment to obtain a mixed solution A;
under the condition of stirring, mixing 80-120% of alcohol by volume in the mixed solution A, 40-60% of deionized water by volume in the mixed solution A, 8-15% of glacial acetic acid by volume in the mixed solution A and 3-8% of dilute hydrochloric acid by volume in the mixed solution A, and violently stirring for 5-10min at 30-50 ℃ to obtain mixed solution B; adding the mixed solution B into the mixed solution A, strongly stirring for 1-2h at 30-50 ℃, washing with water after stirring,Filtering, drying to obtain TiO 2 Depositing the modified hemp stalk core powder.
6. The method of claim 5, wherein: the alcohol used in the step (3) is one of ethanol, propanol, butanol and n-propanol, and the mass ratio of the titanate coupling agent modified hemp stalk core powder to the alcohol solution is 1 (5-10); the titanate is one of tetraethyl titanate, isopropyl titanate and tetrabutyl titanate.
7. Use of the modified hemp stem core powder obtained by the preparation method of any one of claims 1 to 6 in the preparation of cat litter.
8. The modified hemp stem core powder composite cat litter is characterized by comprising the following raw materials in percentage by weight: 50-70% of modified hemp stalk core powder obtained by the preparation method of any one of claims 1-6, 5-20% of starch, 1-5% of calcium carbonate, 1-5% of nano bentonite, 5-10% of guar gum, 5-10% of xanthan gum and 5-10% of water-absorbing resin.
9. The modified hemp stalk core powder composite cat litter of claim 8, wherein: the modified hemp stalk core powder is prepared from titanate coupling agent modified hemp stalk core powder and TiO 2 Depositing one of the modified hemp stalk core powders; the starch is at least one of corn starch and expanded starch; the calcium carbonate is light calcium carbonate, and the content of the calcium carbonate is more than 95 percent; the nano bentonite is sodium bentonite, and the mesh number is 200-400 meshes; the molecular weight of the guar gum is 5w-80w; the xanthan gum is high-viscosity xanthan gum, and the viscosity mPa.s is more than or equal to 1200; the water-absorbing resin is low-crosslinking sodium polyacrylate powder resin with a particle size of 100-120 meshes.
10. The method for preparing the modified hemp stem core powder composite cat litter of claims 8-9, which comprises the following steps: the raw materials are uniformly mixed according to a certain proportion, then prepared into particles, and dried to obtain the modified hemp stem core powder composite cat litter.
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