CN114100343A - Slow-release formaldehyde-removing gel with color display indication function - Google Patents
Slow-release formaldehyde-removing gel with color display indication function Download PDFInfo
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- CN114100343A CN114100343A CN202110904813.3A CN202110904813A CN114100343A CN 114100343 A CN114100343 A CN 114100343A CN 202110904813 A CN202110904813 A CN 202110904813A CN 114100343 A CN114100343 A CN 114100343A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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Abstract
The slow-release formaldehyde-removing gel with the color development indicating function comprises the following components in parts by weight: the main agent is composed of one or more of sodium chlorite, potassium chlorite and magnesium chlorite: 8% -15%; the slow release agent is composed of one or more of carrageenan, jelly glue, gel and agar: 15% -25%; a stabilizer consisting of one or more of sodium chloride, magnesium chloride and potassium chloride: 5% -15%; the redox indicator is composed of one of methylene blue, o-phenanthrene ferrous diazide and sodium diphenylamine sulfonate: 0.05% -0.2%; the main agent, the slow release agent, the stabilizing agent and the redox indicator are dissolved in water and then are heated and condensed into gel to form the component A; an activator consisting of an aqueous solution of one or more of sodium bisulfate, sodium sulfate, potassium bisulfate, potassium sulfate, citric acid, EDTA: 4% -8%; the activating agent is a component B; the balance of water, and the A component and the B component are separately packaged when not used.
Description
Technical Field
The invention belongs to the technical field of formaldehyde removal, and particularly relates to a sustained-release formaldehyde-removing gel with a color rendering indication function.
Background
Formaldehyde is an organic chemical substance and is a colorless, irritant, toxic gas. Acute poisoning by formaldehyde manifests as irritation to the skin and mucous membranes. Inhalation of high concentrations of formaldehyde can lead to respiratory irritation symptoms, sneezing, coughing and burning sensations in the nose and throat; in addition, bronchial asthma, pneumonia, and pulmonary edema can also be induced. A large amount of formaldehyde is taken into the digestive tract at one time, which can cause toxic symptoms of the digestive tract and the whole body, erosive burn of the oral cavity, the throat and the digestive tract, abdominal pain, convulsion, death and the like. The skin can cause allergic dermatitis, color spots, skin necrosis and other diseases when contacting with formaldehyde. The long-term exposure to formaldehyde can reduce the respiratory function and the information integration function of the nervous system of the organism, influence the immune response of the organism at the same time, and have toxic effects on the cardiovascular system, the endocrine system, the digestive system, the reproductive system and the kidney. In addition, and formaldehyde has a strong carcinogenic potential, the world health organization international agency for the study of cancer has placed formaldehyde on a list of carcinogens.
In the house decoration process, the maximum decoration pollution causes formaldehyde, and the excessive formaldehyde in a room is quite harmful to human bodies, so that a necessary method is needed to reduce the content of the formaldehyde. The methods currently used for removing formaldehyde are roughly as follows: plant absorption method, aeration discharge method, carbon adsorption method, purifier treatment method, chemical agent treatment method, and light touch purification method. Among them, the chemical treatment method mainly captures formaldehyde by two ways: one is to purify the air by neutralizing formaldehyde to generate harmless substances; one is to purify the air by blocking formaldehyde and preventing the formaldehyde from volatilizing. Such as: the carbon adsorption method is to utilize the characteristics of activated carbon to adsorb and decompose formaldehyde.
The existing chemical preparation method and the existing carbon adsorption method in the market are characterized in that chemical preparations or activated carbon are placed in a room, the chemical preparations are volatilized by natural air flow to capture formaldehyde or the activated carbon is used for adsorbing and decomposing the formaldehyde, the efficiency is relatively low, the slow release and indication functions are not provided, the formaldehyde removing state of the chemical preparations cannot be known, the blind trust of a user on the formaldehyde removing state is often caused, and therefore the formaldehyde adsorption method and the formaldehyde adsorption method can move more frequently in the formaldehyde environment and can form a more serious health problem.
Therefore, the present application has conducted further research on formaldehyde removal technology in view of some of the problems in the prior art above.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the sustained-release formaldehyde-removing gel with the color rendering indication function, the components are reasonable in proportion, the cost is low, the sustained-release formaldehyde-removing function can be well performed, and after the formaldehyde-removing function is lost, the overall apparent color can be changed to remind a user of timely replacement.
In order to solve the above technical problems, the present invention is solved by the following technical solutions.
The slow-release formaldehyde-removing gel with the color development indicating function comprises the following components in parts by weight: the main agent is composed of one or more of sodium chlorite, potassium chlorite and magnesium chlorite: 8% -15%; the slow release agent is composed of one or more of carrageenan, jelly glue, gel and agar: 15% -25%; a stabilizer consisting of one or more of sodium chloride, magnesium chloride and potassium chloride: 5% -15%; the redox indicator is composed of one of methylene blue, o-phenanthrene ferrous diazide and sodium diphenylamine sulfonate: 0.05% -0.2%; the main agent, the slow release agent, the stabilizing agent and the redox indicator are dissolved in water and then are heated and condensed into gel to form the component A; an activator consisting of an aqueous solution of one or more of sodium bisulfate, sodium sulfate, potassium bisulfate, potassium sulfate, citric acid, EDTA: 4% -8%; the activating agent is a component B; the balance of water, the component A is a gel, and the main agent, the stabilizing agent and the redox indicator are uniformly dispersed in the gel; when not used, the A component and the B component are separately packaged.
In the application, the slow-release formaldehyde-removing gel comprises a component A with a blocky gel structure and a component B of weak acid aqueous solution, and the slow-release formaldehyde-removing gel is separately and independently packaged, is not in contact with the outside and has high stability. When the air purifier is used, the component A is packed and unpacked, the component B solution is dripped on the component A, an acidic water-soluble environment is generated in the component A, chlorite is gradually decomposed in the acidic environment to generate chlorine dioxide and the chlorine dioxide is released into the air, and the chlorine dioxide reacts with formaldehyde in the air to achieve the purpose of removing the formaldehyde.
Meanwhile, in the application, the aqueous solution of the component B gradually permeates and diffuses in the component A, so that the reaction can be slowly carried out, the aim of slowly releasing chlorine dioxide is fulfilled, and the formaldehyde is stably and durably absorbed. The gel matrix (gel) in the application also plays a role in dispersing each component, so that the reaction is stably carried out, and the slow release effect is achieved.
Before and after the reaction, the potential state of the system changes, and the change can be indicated by a redox indicator. Thus, in the present application, a redox indicator may be incorporated into the gel matrix to indicate the progress of the reaction. Such as: the color of the color developing agent is just started, and the unreacted composition has a bleaching effect along with the generation and diffusion of the chlorine dioxide into the gel matrix, so that the original color of the gel matrix gradually fades and gradually becomes yellow (the color of the chlorine dioxide dissolved in the gel), and after the chlorine dioxide is completely released, the gel becomes colorless, which indicates that the reaction is finished, and the gel does not have the function of slowly releasing and removing formaldehyde and needs to be replaced.
In a preferred embodiment, the weight ratio of the main agent is 10-12%, the weight ratio of the slow release agent is 19-22%, the weight ratio of the stabilizing agent is 8-12%, the weight ratio of the activating agent is 5-6%, and the weight ratio of the redox indicator is 0.1%.
In a preferred embodiment, the activator is an aqueous solution of a mixture of sodium bisulfate and sodium sulfate.
In a preferred embodiment, the stabilizer is sodium chloride.
In a preferred embodiment, the gel is an agar gel.
In the reaction system, the chloride ion concentration is improved, so that the reaction balance is favorably moved to the left, the slow release function is improved, and the reaction is stabilized.
Compared with the prior art, the invention has the following beneficial effects: the sustained-release formaldehyde-removing gel with the color rendering indication function is reasonable in component proportion and low in cost, can well perform the sustained-release formaldehyde-removing function, and can change the overall apparent color after the formaldehyde-removing function is lost, so that a user is reminded to replace the gel in time.
Detailed Description
The present invention is described in further detail below by way of specific embodiments.
The slow-release formaldehyde-removing gel with the color rendering indication function comprises the following components in parts by weight: the main agent is composed of one or more of sodium chlorite, potassium chlorite and magnesium chlorite: 8% -15%; the slow release agent is composed of one or more of carrageenan, jelly glue, gel and agar: 15% -25%; a stabilizer consisting of one or more of sodium chloride, magnesium chloride and potassium chloride: 5% -15%; the redox indicator is composed of one of methylene blue, o-phenanthrene ferrous diazide and sodium diphenylamine sulfonate: 0.05% -0.2%; the main agent, the slow release agent, the stabilizing agent and the redox indicator are dissolved in water and then are heated and condensed into gel to form the component A.
An activator consisting of an aqueous solution of one or more of sodium bisulfate, sodium sulfate, potassium bisulfate, potassium sulfate, citric acid, EDTA: 4% -8%; the activator is a component B.
The balance of water, the component A is a gel, and the main agent, the stabilizing agent and the redox indicator are uniformly dispersed in the gel; when not used, the A component and the B component are separately packaged.
The following are specific examples.
The first embodiment is as follows: weighing the following materials in parts by weight: sodium chlorite 15% as a main agent, jelly gum 20% as a sustained release agent, sodium chloride 10% as a stabilizer, methylene blue 0.05% as a redox indicator, a citric acid aqueous solution 4% as an activator (the mass fraction of solute in the citric acid aqueous solution is 5%), and the balance being water. The total weight of the whole was 160 g.
The main agent, the slow release agent, the stabilizing agent and the redox indicator are dissolved in water and are heated (60-70 ℃) to be coagulated into gel, which is the component A. The activator is a component B. In use, the activator of the B component is dropped on the gel of the A component.
Example two: weighing the following materials in parts by weight: 8% of potassium chlorite as a main agent, 25% of carrageenan as a slow-release agent, 5% of potassium chloride as a stabilizing agent, 0.2% of diphenylamine sodium sulfonate as an oxidation-reduction indicator, 8% of potassium hydrogen sulfate aqueous solution as an activating agent (the mass fraction of solute in the potassium hydrogen sulfate aqueous solution is 5%), and the balance of water. The total weight of the whole was 160 g.
The main agent, the slow release agent, the stabilizing agent and the redox indicator are dissolved in water and are heated (60-70 ℃) to be coagulated into gel, which is the component A. The activator is a component B. In use, the activator of the B component is dropped on the gel of the A component.
Example three: weighing the following materials in parts by weight: 12% of magnesium chlorite as a main agent, 20% of agar as a slow release agent, 10% of magnesium chloride as a stabilizing agent, 0.1% of ferrous phenanthroline as an oxidation-reduction indicator, 6% of sodium bisulfate aqueous solution as an activating agent (the mass fraction of solute in the sodium bisulfate aqueous solution is 5%), and the balance of water. The total weight of the whole was 160 g.
The main agent, the slow release agent, the stabilizing agent and the redox indicator are dissolved in water and are heated (60-70 ℃) to be coagulated into gel, which is the component A. The activator is a component B. In use, the activator of the B component is dropped on the gel of the A component.
Example four: weighing the following materials in parts by weight: 11% of sodium chlorite as a main agent, 20% of gel as a slow release agent, 10% of sodium chloride as a stabilizing agent, 0.1% of phenanthroline ferrous ortho-iron as a redox indicator, 6% of sodium sulfate aqueous solution as an activating agent (the mass fraction of solute in the sodium sulfate aqueous solution is 5%), and the balance of water. The total weight of the whole was 160 g.
The main agent, the slow release agent, the stabilizing agent and the redox indicator are dissolved in water and are heated (60-70 ℃) to be coagulated into gel, which is the component A. The activator is a component B. In use, the activator of the B component is dropped on the gel of the A component.
Comparative example one: the sustained-release agent in the first embodiment is removed and replaced by the same amount of water, namely the component A is also an aqueous solution, and the rest components are unchanged.
Comparative example two: the stabilizer in example three was removed and replaced with an equal amount of water, and the remaining components were unchanged.
The products of the above examples and comparative examples were tested by: dropping the component B onto the component A, placing the component A in an open state, placing the component B in a formaldehyde removal test chamber, and detecting the formaldehyde concentration in the environment every day through a formaldehyde detection device to obtain the following test results.
The first embodiment is as follows: the formaldehyde removal effect was observed within 22 days, during which time the formaldehyde concentration in the test environment decreased, during which time the color of the gel became pale yellow. The formaldehyde removal effect started to decline at day 23, the color of the gel gradually faded from light yellow to no formaldehyde removal function at day 25, and the color of the gel became colorless, indicating that the formaldehyde removal function was fully utilized.
Example two: the formaldehyde removal effect was observed within 20 days, during which time the formaldehyde concentration in the test environment decreased, during which time the color of the gel became pale yellow. The formaldehyde removal effect started to decline at day 21, the color of the gel gradually faded from light yellow to no formaldehyde removal function at day 23, and the color of the gel became colorless, indicating that the formaldehyde removal function was fully utilized.
Example three: the formaldehyde removal effect was observed within 21 days, during which the formaldehyde concentration in the test environment decreased, during which the gel became pale yellow in color. The formaldehyde removal effect started to decline at day 22, the color of the gel gradually faded from light yellow to no formaldehyde removal function at day 25, and the color of the gel became colorless, indicating that the formaldehyde removal function was fully utilized.
Example four: the formaldehyde removal effect was observed within 20 days, during which time the formaldehyde concentration in the test environment decreased, during which time the color of the gel became pale yellow. The formaldehyde removal effect started to decline at day 21, the color of the gel gradually faded from light yellow to no formaldehyde removal function at day 24, and the color of the gel became colorless, indicating that the formaldehyde removal function was fully utilized.
Comparative example one: the formaldehyde removal effect is achieved within 3 days, and the formaldehyde concentration in the test environment is rapidly reduced, during which the solution becomes yellowish. The formaldehyde removal effect started to decrease at day 4, the solution color gradually faded from light yellow, and the solution color became colorless by day 5 without the formaldehyde removal function.
Comparative example two: the formaldehyde removal effect was observed within 15 days, during which the formaldehyde concentration in the test environment decreased, during which the gel became yellowish in color. The formaldehyde removal effect started to decline at day 16, the color of the gel gradually faded from light yellow, and the color of the gel became colorless to indicate that the formaldehyde removal function was fully utilized by the time of day 17.
As can be seen from the above description, the sustained-release formaldehyde-removing gel in the present application has a block-shaped gel matrix structure, and the component A and the component B are respectively placed in independent packaging structures without contacting with each other under the condition of not using. In use, the A component gel is taken out and placed in a container with an opening for use. Then the component B acid solution is dripped on the surface of the component A gel slowly, the component A gel slowly permeates with the acid solution to generate a plurality of acid water-soluble environments, in the acid environments, chlorite is gradually decomposed to generate chlorine dioxide and is released into the air, and the chlorine dioxide reacts with formaldehyde in the air to achieve the aim of removing the formaldehyde, and meanwhile, the reaction is stably carried out to achieve the slow release effect.
Before and after the reaction, the potential state of the system changes, and the change can be indicated by a redox indicator. Thus, in the present application, a redox indicator may be incorporated into the gel matrix to indicate the progress of the reaction. Such as: the color of the color developing agent is just started, and the unreacted composition has a bleaching effect along with the generation and diffusion of the chlorine dioxide into the gel matrix, so that the original color of the gel matrix gradually fades and gradually becomes yellow (the color of the chlorine dioxide dissolved in the gel), the formaldehyde removing effect is best, the gel becomes colorless after the chlorine dioxide is completely released, the gel is completely reacted, the function of slowly releasing and removing the formaldehyde is not provided, and the gel needs to be replaced. In a reaction system, the placement of the stabilizer can improve the concentration of chloride ions and corresponding cations, which is beneficial to shifting the reaction balance to the left and improving the slow release function.
The sustained-release formaldehyde-removing gel with the color rendering indication function has the advantages of reasonable component proportion, low cost, and capability of well performing the sustained-release formaldehyde-removing function, and when the formaldehyde-removing function is lost, the overall apparent color can be changed to remind a user of timely replacement.
The scope of the present invention includes, but is not limited to, the above embodiments, and the present invention is defined by the appended claims, and any alterations, modifications, and improvements that may occur to those skilled in the art are all within the scope of the present invention.
Claims (4)
1. The slow-release formaldehyde-removing gel with the color development indicating function is characterized by comprising the following components in parts by weight:
the main agent is composed of one or more of sodium chlorite, potassium chlorite and magnesium chlorite: 8% -15%;
the slow release agent is composed of one or more of carrageenan, jelly glue, gel and agar: 15% -25%;
a stabilizer consisting of one or more of sodium chloride, magnesium chloride and potassium chloride: 5% -15%;
the redox indicator is composed of one of methylene blue, o-phenanthrene ferrous diazide and sodium diphenylamine sulfonate: 0.05% -0.2%;
the main agent, the slow release agent, the stabilizing agent and the redox indicator are dissolved in water and then are heated and condensed into gel to form the component A;
an activator consisting of an aqueous solution of one or more of sodium bisulfate, sodium sulfate, potassium bisulfate, potassium sulfate, citric acid, EDTA: 4% -8%; the activating agent is a component B;
the balance of water; when not used, the A component and the B component are separately packaged.
2. The sustained-release formaldehyde-removing gel with the color rendering indication function according to claim 1, wherein the weight ratio of the main agent is 10% -12%, the weight ratio of the sustained-release agent is 19% -20%, the weight ratio of the stabilizer is 8% -12%, the weight ratio of the activator is 5% -6%, and the weight ratio of the redox indicator is 0.1%.
3. The sustained-release formaldehyde-removing gel with a color rendering indication function according to any one of claims 1 or 2, wherein the activator is an aqueous solution of sodium bisulfate or sodium sulfate.
4. The sustained-release formaldehyde-removing gel with the color rendering indication function according to any one of claims 1 or 2, wherein the stabilizer is sodium sulfate or sodium chloride.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110904813.3A CN114100343A (en) | 2021-08-07 | 2021-08-07 | Slow-release formaldehyde-removing gel with color display indication function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110904813.3A CN114100343A (en) | 2021-08-07 | 2021-08-07 | Slow-release formaldehyde-removing gel with color display indication function |
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| CN115948109A (en) * | 2022-12-20 | 2023-04-11 | 长安大学 | Ointment for identifying LNAPL phase thickness in polluted water well through oxidation and application |
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