CN112759801B - Biodegradable plant polysaccharide aerogel oil storage cotton and preparation method thereof - Google Patents
Biodegradable plant polysaccharide aerogel oil storage cotton and preparation method thereof Download PDFInfo
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- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
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- C08J2305/04—Alginic acid; Derivatives thereof
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Abstract
The invention discloses biodegradable polysaccharide aerogel oil storage cotton and a preparation method thereof. The polysaccharide aerogel oil storage cotton prepared by the method has a rich network structure, can adsorb more tobacco tar, so that the oil storage rate of the oil storage cotton is improved, and also has excellent water resistance, so that the oil storage cotton can last in hydrophilic substances. In addition, the raw materials are mainly natural plant polysaccharide, so that the degradation speed is high, white pollution is not caused, and the oil storage cotton prepared from the natural plant polysaccharide is free of toxic and harmful substances, so that the oil storage cotton does not harm human health, and has a wide application prospect.
Description
Technical Field
The invention belongs to the technical field of environment-friendly materials, and particularly relates to biodegradable plant polysaccharide aerogel oil storage cotton and a preparation method thereof.
Background
The electronic cigarette is an electronic product imitating a traditional cigarette and mainly comprises an electric core, an atomizer and other parts, and the appearance of the electronic cigarette is mainly divided into a smoking cessation type and a cigarette replacement type. The electronic cigarette has similar taste and feel with the traditional cigarette, but does not burn, so that some toxic substances such as tar, carbon monoxide and the like are greatly reduced, atomized smoke is rapidly diluted in air, and no second-hand smoke hazard is caused.
Since the advent of tobacco tar electronic cigarettes, the market has rapidly developed. Meanwhile, along with the promotion of the cigarette control policy, the risk of harm of the traditional cigarettes to human bodies is gradually deep, so that more and more tobacco consumers gradually give up the traditional cigarettes, and the consumer market of the electronic cigarettes is increasingly enlarged.
The expansion of the electronic cigarette market also brings a series of environmental problems, such as the recycling problem of batteries in the electronic cigarettes, and the increasing amount of oil storage cotton in a tobacco tar bin in an atomizer causes the increasing increase of environmental pollution. The oil storage cotton is used as an important component in the electronic cigarette, and the safety and the degradability of the material can have certain influence on the safety and the green sustainable development of the human body. The material of the oil storage cotton is mainly made of foaming cotton and some artificial synthetic fibers, the foaming sponge is made of some nondegradable and toxic materials in the preparation process, so that the foaming sponge has certain safety, the artificial fibers are made of natural high molecular compounds or artificial synthetic high molecular compounds as raw materials, the degradation time is too long, and toxic and harmful substances are generated in the degradation process. Research shows that the artificial fiber material and the foaming sponge have burnt smell under the condition of high temperature, and also can generate harmful substances to cause harm to human bodies. With the popularization of plastic forbidden orders, the use environment of the materials is gradually limited until the materials are replaced.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide novel biodegradable polysaccharide aerogel oil storage cotton and a preparation method thereof, wherein the oil storage cotton prepared by the method is prepared from raw materials such as pure natural konjak glucomannan, sodium alginate, starch and the like, has wide sources, and the used waste can be decomposed and utilized by microorganisms in soil, so that the oil storage cotton has excellent degradability and does not generate any toxic and harmful substances; in addition, the invention adopts the vacuum freeze drying method to prepare the oil storage cotton, has simple process and low equipment cost, and can be produced in large scale.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the biodegradable polysaccharide aerogel oil storage cotton comprises the following raw materials:
preferably, the alkaline substance is one or more selected from sodium hydroxide, calcium hydroxide, potassium hydroxide, sodium carbonate and calcium carbonate.
Preferably, the calcium salt is one or more selected from calcium chloride, calcium carbonate and calcium acetate.
Preferably, the saidThe oil storage rate of the oil storage cotton is more than 0.8mL/cm 3 The porosity is more than 80%, and the storage time is longer than 6 months.
In addition, the invention also claims a preparation method of the biodegradable polysaccharide aerogel oil storage cotton, which comprises the following steps:
(1) Preparing mixed glue solution: respectively weighing konjak glucomannan powder, sodium alginate powder and starch according to parts by weight, mixing the three powder raw materials, adding the mixture into deionized water, adding glycerol, stirring to prepare a mixed glue solution, and heating the prepared mixed glue solution to 95 ℃ in a water bath for standby;
(2) Preparing an alkaline solution: dissolving alkaline substances in deionized water to prepare strong alkali solution with pH value of 10-13 for later use;
(3) Preparing a calcium ion solution: dissolving calcium salt in deionized water to prepare a calcium ion solution with the mass concentration of 0.1-2% for later use;
(4) Homogenizing the solution: homogenizing the mixed glue solution prepared in the step (1) under the condition of ultra-high pressure of 20-25 MPa;
(5) Standing the homogenized mixed glue solution in the step (4) to gel the mixed glue solution;
(6) Extrusion molding: pouring the gelled substance obtained in the step (5) into a mould, and performing extrusion molding in an environment of 20-30 ℃;
(7) Placing the semi-finished product obtained in the step (6) in a freezing environment for freezing and forming;
(8) And (3) placing the frozen sample obtained in the step (7) in a vacuum freeze dryer for freeze drying.
Preferably, the temperature of the deionized water in the step (1) is 20-30 ℃, the stirring speed is 300-600rpm/min, and the heating rate is 0.5-3 ℃/min.
Preferably, the mass concentration of the konjac glucomannan powder, the sodium alginate powder and the starch in the mixed glue solution in the step (1) is 1-10%.
Preferably, during the homogenization treatment in step (4), 2-5mL of the calcium ion solution in step (3) and 1-10mL of the alkaline solution in step (2) are added to every 100mL of the mixed glue solution.
Preferably, the thickness formed in step (6) is from 0.5mm to 30mm.
Preferably, the temperature of freezing in the step (7) is-60-0 ℃ and the time is 1-24h.
Preferably, the freeze-drying temperature is-60 to-40 ℃ and the drying time is 12-48h.
Compared with the prior art, the invention has the following beneficial effects:
(1) Compared with other degradable oil-storing cotton, the biodegradable plant polysaccharide oil-storing cotton prepared by the invention has the function of gel at normal temperature, so that the biodegradable plant polysaccharide oil-storing cotton does not need to be gel after pre-freezing, a large amount of time and energy are saved, and the production efficiency is improved.
(2) The polysaccharide aerogel oil storage cotton prepared by the method has a rich network structure, can adsorb more tobacco tar, so that the oil storage rate of the oil storage cotton is improved, and also has excellent water resistance, so that the oil storage cotton can last in hydrophilic substances.
(3) The biodegradable plant polysaccharide oil storage cotton prepared by the invention can adsorb tobacco tar in a tobacco tar bin, and can avoid the phenomena of oil leakage, oil spilling and the like caused by inverted placement or long-time storage when in use.
(4) The raw materials of the invention are mainly natural plant polysaccharide, so the degradation speed is high, white pollution is not caused, and the oil storage cotton prepared by using the natural plant polysaccharide is free from toxic and harmful substances, so the oil storage cotton does not cause harm to human health.
(5) According to the invention, the water resistance is increased due to deacetylation of the konjak glucomannan in an alkaline environment, so that the storage period of the oil storage cotton in a tobacco tar environment is prolonged.
Detailed Description
In order to clearly illustrate the technical features of the present invention, the present invention will be described with reference to specific embodiments, but the scope of the present invention is not limited to these embodiments, and all changes or equivalents that do not depart from the spirit of the present invention are included in the scope of the present invention.
Example 1
A preparation method of biodegradable polysaccharide aerogel oil storage cotton comprises the following steps:
(1) Preparing mixed glue solution: weighing 1g of konjak glucomannan powder, 2g of sodium alginate powder and 1g of starch, mixing the three powder raw materials, adding the mixture into 90mL of deionized water at 20 ℃, adding 0.4g of glycerol, stirring at a stirring speed of 500rpm/min to prepare a mixed glue solution, and heating the prepared mixed glue solution to 95 ℃ in a water bath at a heating rate of 3 ℃/min for later use;
(2) Preparing an alkaline solution: dissolving sodium hydroxide in deionized water to prepare a strong alkali solution with the pH value of 12;
(3) Preparing a calcium ion solution: weighing 0.005g of calcium carbonate, and dissolving in deionized water to prepare a calcium ion solution with the mass concentration of 0.5%;
(4) Homogenizing the solution: homogenizing the mixed glue solution prepared in the step (1), and adding 10mL of the strong alkaline solution in the step (2) and 5mL of the calcium ion solution in the step (3) into the mixed glue solution in the homogenizing process;
(5) Standing the homogenized mixed solution in the step (4) to gel the mixed solution;
(6) Extrusion molding: pouring the gelled substance obtained in the step (5) into a mould for molding under the condition of normal temperature, wherein the molding thickness is 10mm;
(7) Placing the semi-finished product obtained in the step (6) in a freezing environment for freezing and forming, wherein the freezing temperature is minus 20 ℃ and the time is 4 hours;
(8) And (3) freeze-drying the frozen sample obtained in the step (7) in a vacuum freeze dryer at the temperature of-50 ℃ for 16 hours.
Example 2
A preparation method of biodegradable polysaccharide aerogel oil storage cotton comprises the following steps:
(1) Preparing mixed glue solution: weighing 1g of konjak glucomannan powder, 1.5g of sodium alginate powder and 1.5g of starch, mixing the three powder raw materials, adding the mixture into 88mL of deionized water at 20 ℃, adding 0.4g of glycerol, stirring at a stirring speed of 500rpm/min to prepare a mixed glue solution, and heating the prepared mixed glue solution to 95 ℃ in a water bath at a heating rate of 3 ℃/min for later use;
(2) Preparing an alkaline solution: dissolving sodium hydroxide in deionized water to prepare a strong alkali solution with the pH value of 12;
(3) Preparing a calcium ion solution: 0.01g of calcium carbonate is weighed and dissolved in deionized water to prepare a calcium ion solution with the mass concentration of 1 percent;
(4) Homogenizing the solution: homogenizing the mixed glue solution prepared in the step (1), and adding 5mL of the strong alkaline solution in the step (2) and 2mL of the calcium ion solution in the step (3) into the mixed glue solution in the homogenizing process;
(5) Standing the homogenized mixed solution in the step (4) to gel the mixed solution;
(6) Extrusion molding: pouring the gelled substance obtained in the step (5) into a mould for molding under the condition of normal temperature, wherein the molding thickness is 10mm;
(7) Placing the semi-finished product obtained in the step (6) in a freezing environment for freezing and forming, wherein the freezing temperature is minus 20 ℃ and the time is 4 hours;
(8) And (3) freeze-drying the frozen sample obtained in the step (7) in a vacuum freeze dryer at the temperature of-50 ℃ for 16 hours.
Example 3
A preparation method of biodegradable polysaccharide aerogel oil storage cotton comprises the following steps:
(1) Preparing mixed glue solution: weighing 1g of konjak glucomannan powder, 2.5g of sodium alginate powder and 1.5g of starch, mixing the three powder raw materials, adding the mixture into 92mL of deionized water at 20 ℃, adding 0.5g of glycerol, stirring at a stirring speed of 500rpm/min to prepare a mixed glue solution, and heating the prepared mixed glue solution to 95 ℃ in a water bath at a heating rate of 3 ℃/min for later use;
(2) Preparing an alkaline solution: dissolving sodium hydroxide in deionized water to prepare a strong alkali solution with the pH value of 12;
(3) Preparing a calcium ion solution: 0.01g of calcium carbonate is weighed and dissolved in deionized water to prepare a calcium ion solution with the mass concentration of 1 percent;
(4) Homogenizing the solution: homogenizing the mixed glue solution prepared in the step (1), and adding 8mL of the strong alkaline solution in the step (2) and 3mL of the calcium ion solution in the step (3) into the mixed glue solution in the homogenizing process;
(5) Standing the homogenized mixed solution in the step (4) to gel the mixed solution;
(6) Extrusion molding: pouring the gelled substance obtained in the step (5) into a mould for molding under the condition of normal temperature, wherein the molding thickness is 10mm;
(7) Placing the semi-finished product obtained in the step (6) in a freezing environment for freezing and forming, wherein the freezing temperature is minus 20 ℃ and the time is 4 hours;
(8) And (3) freeze-drying the frozen sample obtained in the step (7) in a vacuum freeze dryer at the temperature of-50 ℃ for 16 hours.
Example 4
A preparation method of biodegradable polysaccharide aerogel oil storage cotton comprises the following steps:
(1) Preparing mixed glue solution: weighing 1g of konjak glucomannan powder, 2.5g of sodium alginate powder and 1.5g of starch, mixing the three powder raw materials, adding the mixture into 95mL of deionized water at 20 ℃, adding 0.5g of glycerol, stirring at a stirring speed of 500rpm/min to prepare a mixed glue solution, and heating the prepared mixed glue solution to 95 ℃ in a water bath at a heating rate of 3 ℃/min for later use;
(2) Preparing an alkaline solution: dissolving sodium hydroxide in deionized water to prepare a strong alkali solution with pH of 11;
(3) Preparing a calcium ion solution: 0.02g of calcium carbonate is weighed and dissolved in deionized water to prepare a calcium ion solution with the mass concentration of 2 percent;
(4) Homogenizing the solution: homogenizing the mixed glue solution prepared in the step (1), and adding 5mL of the strong alkaline solution in the step (2) and 5mL of the calcium ion solution in the step (3) into the mixed glue solution in the homogenizing process;
(5) Standing the homogenized mixed solution in the step (4) to gel the mixed solution;
(6) Extrusion molding: pouring the gelled substance obtained in the step (5) into a mould for molding under the condition of normal temperature, wherein the molding thickness is 10mm;
(7) Placing the semi-finished product obtained in the step (6) in a freezing environment for freezing and forming, wherein the freezing temperature is minus 30 ℃ and the time is 4 hours;
(8) And (3) freeze-drying the frozen sample obtained in the step (7) in a vacuum freeze dryer at the temperature of-50 ℃ for 16 hours.
The performance of commercially available electronic cigarette oil storage cotton and the biodegradable polysaccharide aerogel oil storage cotton samples prepared in examples 1-4 were measured as follows:
wherein:
the porosity measurement method comprises the following steps:
weigh the oil storage cotton sample (m 1 ) Then it was completely immersed in a container filled with ethanol and weighed together (m 2 ). Subsequently, the container was placed in a vacuum drying oven for vacuum drying until no bubbles were overflowed from the sample. After removal of the sample from the container, the weight of the container containing residual ethanol was recorded in m 3 . The porosity of the sample was calculated according to the following formula:
the oil storage rate testing method comprises the following steps:
the first step: calculating the volume of the hollow cylinder of the oil reservoir (2), and recording as V 1
And a second step of: weigh reservoir weight recorded as M 1
And a third step of: measuring a certain volume (V) 2 ) Is weighed and has a weight of M 2
Fourth step: calculate the density of analytically pure glycerol, ρ=m 2 /V 2
Fifth step: soaking the oil reservoir completely in glycerol, draining after the oil reservoir is completely adsorbed, and weighing the medium of the oil reservoir after the glycerol is adsorbed to be M 3
Sixth step: calculating the oil storage rate according to the formula:
it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (7)
1. The application of the biodegradable polysaccharide aerogel in preparing the electronic cigarette oil storage cotton is characterized in that the preparation raw materials of the electronic cigarette oil storage cotton comprise the following components:
wherein the alkaline substance is one or more selected from sodium hydroxide, calcium hydroxide, potassium hydroxide, sodium carbonate and calcium carbonate, and the calcium salt is one or more selected from calcium chloride, calcium carbonate and calcium acetate;
the preparation of the electronic cigarette oil storage cotton comprises the following steps:
(1) Preparing mixed glue solution: respectively weighing konjak glucomannan powder, sodium alginate powder and starch according to parts by weight, mixing the three powder raw materials, adding the mixture into deionized water, adding glycerol, stirring to prepare a mixed glue solution, and heating the prepared mixed glue solution to 95 ℃ in a water bath for standby;
(2) Preparing an alkaline solution: dissolving alkaline substances in deionized water to prepare strong alkali solution with pH value of 10-13 for later use;
(3) Preparing a calcium ion solution: dissolving calcium salt in deionized water to prepare a calcium ion solution with the mass concentration of 0.1-2% for later use; (4) solution homogenization treatment: homogenizing the mixed glue solution prepared in the step (1) under the condition of ultra-high pressure of 20-25 MPa;
(5) Standing the homogenized mixed glue solution in the step (4) to gel the mixed glue solution;
(6) Extrusion molding: pouring the gelled substance obtained in the step (5) into a mould, and performing extrusion molding in an environment of 20-30 ℃;
(7) Placing the semi-finished product obtained in the step (6) in a freezing environment for freezing and forming;
(8) Placing the frozen sample obtained in the step (7) in a vacuum freeze dryer for freeze drying;
wherein, in the homogenizing treatment process in the step (4), 2-5mL of the calcium ion solution in the step (3) and 1-10mL of the alkaline solution in the step (2) are added into every 100mL of the mixed glue solution.
2. The use according to claim 1, wherein the oil storage cotton has an oil storage rate of more than 0.8mL/cm 3 The porosity is more than 80%, and the storage time is longer than 6 months.
3. The use according to claim 1, wherein the deionized water in step (1) has a temperature of 20 ℃ to 30 ℃, a stirring speed of 300 rpm to 600rpm/min, and a heating rate of 0.5 ℃/min to 3 ℃/min.
4. The use according to claim 1, wherein the mass concentration of the sum of the konjac glucomannan powder, the sodium alginate powder and the starch in the mixed glue solution in step (1) is 1-10%.
5. The use according to claim 1, wherein the thickness formed in step (6) is 0.5mm to 30mm.
6. The use according to claim 1, wherein the temperature of freezing in step (7) is-60 to 0 ℃ for a period of 1 to 24 hours.
7. The use according to claim 1, wherein the freeze-drying temperature is-60 to-40 ℃ and the drying time is 12-48 hours.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011610334.2A CN112759801B (en) | 2020-12-30 | 2020-12-30 | Biodegradable plant polysaccharide aerogel oil storage cotton and preparation method thereof |
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| CN202011610334.2A CN112759801B (en) | 2020-12-30 | 2020-12-30 | Biodegradable plant polysaccharide aerogel oil storage cotton and preparation method thereof |
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| CN112759801A CN112759801A (en) | 2021-05-07 |
| CN112759801B true CN112759801B (en) | 2023-06-20 |
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| WO2014178797A1 (en) * | 2013-05-03 | 2014-11-06 | National University Of Singapore | A Polysaccharide Aerogel |
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