CN111663196A - Preparation method and application of composite nanofiber material - Google Patents

Preparation method and application of composite nanofiber material Download PDF

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CN111663196A
CN111663196A CN202010573164.9A CN202010573164A CN111663196A CN 111663196 A CN111663196 A CN 111663196A CN 202010573164 A CN202010573164 A CN 202010573164A CN 111663196 A CN111663196 A CN 111663196A
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composite
nanofiber material
toilet cleaning
steps
composite nanofiber
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CN111663196B (en
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葛志明
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Zhejiang Haishen New Materials Ltd
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Zhejiang Haishen New Materials Ltd
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/02—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from cellulose, cellulose derivatives, or proteins
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/66—Non-ionic compounds
    • C11D1/83—Mixtures of non-ionic with anionic compounds
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/02—Inorganic compounds ; Elemental compounds
    • C11D3/04—Water-soluble compounds
    • C11D3/046—Salts
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/02—Inorganic compounds ; Elemental compounds
    • C11D3/04—Water-soluble compounds
    • C11D3/08—Silicates
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/02—Inorganic compounds ; Elemental compounds
    • C11D3/04—Water-soluble compounds
    • C11D3/10—Carbonates ; Bicarbonates
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/20—Organic compounds containing oxygen
    • C11D3/2003—Alcohols; Phenols
    • C11D3/2006—Monohydric alcohols
    • C11D3/201—Monohydric alcohols linear
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/20—Organic compounds containing oxygen
    • C11D3/22—Carbohydrates or derivatives thereof
    • C11D3/222—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/20—Organic compounds containing oxygen
    • C11D3/22—Carbohydrates or derivatives thereof
    • C11D3/222—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin
    • C11D3/225—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin etherified, e.g. CMC
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/37—Polymers
    • C11D3/3703—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C11D3/3707—Polyethers, e.g. polyalkyleneoxides
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/40—Dyes ; Pigments
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/0007—Electro-spinning
    • D01D5/0015—Electro-spinning characterised by the initial state of the material
    • D01D5/003—Electro-spinning characterised by the initial state of the material the material being a polymer solution or dispersion
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/10—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one other macromolecular compound obtained by reactions only involving carbon-to-carbon unsaturated bonds as constituent
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/18—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from other substances
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02—Anionic compounds
    • C11D1/04—Carboxylic acids or salts thereof
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02—Anionic compounds
    • C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
    • C11D1/22—Sulfonic acids or sulfuric acid esters; Salts thereof derived from aromatic compounds
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/66—Non-ionic compounds
    • C11D1/72—Ethers of polyoxyalkylene glycols

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Abstract

The invention discloses a preparation method and application of a composite nanofiber material, wherein the preparation method comprises the following steps: firstly, weighing polyvinyl alcohol powder and sodium alginate powder according to a proportion, adding deionized water, heating in a water bath, and stirring for dissolving; then adding hydroxypropyl methyl cellulose ether, continuously stirring for 4h, cooling to room temperature to obtain a colorless transparent spinning solution, filling the spinning solution into a feeding system, preparing primary fibers by processing of an electrostatic spinning device, and then drying in vacuum for 48 h; and finally, placing the primary fiber after vacuum drying in a closed oven for heat treatment at 110 ℃ for 6h, and cooling to room temperature to obtain the composite nanofiber material. The preparation process of the invention has simple steps and low cost, and the slow-release toilet cleaning block prepared from the composite nanofiber material obtained by the method has the characteristics of difficult collapse, long service life, uniform release speed of effective components and good toilet cleaning effect.

Description

Preparation method and application of composite nanofiber material
Technical Field
The invention belongs to the field of polymer material fine chemical industry, and particularly relates to a preparation method of a composite nanofiber material, and the composite nanofiber material is applied to a slow-release toilet cleaning block.
Background
The slow-release toilet cleaning block is a common household toilet bowl cleaning agent, is more and more popular to people due to the advantages of no pungent smell, small corrosiveness and the like, and has two main performance indexes of cleaning effect and long service life. The slow-release toilet cleaning block in the current market takes sodium stearate or paraffin as a framework material, and the sodium stearate or paraffin has weak slow-release capability due to insufficient hardness, quickly collapses into a sheet when placed in a water tank, is quickly dissolved, and has short service time; the latter is not soluble in water, which leads to the formation of discontinuous skeleton structure of sodium stearate, so a certain amount of hydrophilic polymer is needed to improve the slow release effect.
Hydroxypropyl methyl cellulose ether (HPMC) is a non-ionic cold-water-soluble cellulose mixed ether obtained by modifying natural cellulose (such as cotton, wood and the like) through alkalization, epoxypropane, chloromethane etherification and the like, has good emulsification, thickening, water retention, electrolyte resistance and mildew resistance, is often used as a general slow-release carrier, and is widely applied to daily chemical products. However, the slow-release toilet cleaning block only using hydroxypropyl methyl cellulose ether as a framework material has the problems of poor dispersion effect, insufficient mechanical strength, easy agglomeration and collapse and the like, so that the release speed of active ingredients in the slow-release toilet cleaning block is not uniform, the toilet cleaning effect is influenced, and the toilet cleaning effect cannot be kept for a long time.
The nanofiber material has the characteristics of high specific surface area and large porosity, and has wide application prospects in the fields of drug release, engineering materials, biocatalysis and the like. Therefore, if the hydroxypropyl methyl cellulose ether, the polyvinyl alcohol and the sodium alginate are blended to prepare the composite nano-fiber material and the composite nano-fiber material is applied to the mixed skeleton material of the slow-release toilet cleaning block, the composite nano-fiber material has important significance for improving the mechanical strength of the toilet cleaning block, improving the uniformity of the release speed of the effective components of the toilet cleaning block, prolonging the service life and improving the toilet cleaning effect.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a preparation method and application of a composite nano fiber material, the preparation process has simple steps and low cost, and the slow-release toilet cleaning block prepared from the nano composite material obtained by the method has the characteristics of difficult collapse, long service life, uniform release speed of effective components and good toilet cleaning effect.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of a composite nanofiber material comprises the following steps: firstly, weighing polyvinyl alcohol powder and sodium alginate powder according to a proportion, adding deionized water, heating in a water bath, and stirring for dissolving; then adding hydroxypropyl methyl cellulose ether, continuously stirring for 4h, cooling to room temperature to obtain a colorless transparent spinning solution, filling the spinning solution into a feeding system, preparing primary fibers by processing of an electrostatic spinning device, and then drying in vacuum for 48 h; and finally, placing the primary fiber after vacuum drying in a closed oven for heat treatment at 110 ℃ for 6h, and cooling to room temperature to obtain the composite nanofiber material.
The mass ratio of the polyvinyl alcohol powder to the sodium alginate powder is 1: 1-3. The ratio of the sodium alginate solution to the water soluble sodium alginate solution is too high, so that the water soluble sodium alginate solution is easy to form poor fiber forming performance, the sodium alginate solution belongs to polyelectrolyte and has high conductivity, and jet flow is unstable and easy to break to form liquid drops to drip under the action of electric field force; and the size of the nano-fiber is not uniform and the shape is not good easily caused by too low proportion, thereby influencing the moisture absorption.
The mass ratio of the polyvinyl alcohol powder to the hydroxypropyl methyl cellulose ether is 1: 3-5. The rigidity of the nano composite material is easy to be insufficient due to the over-high proportion of the two, the solution viscosity is easy to be reduced due to the added polyvinyl alcohol due to the over-low proportion, and therefore the full volatilization of the solvent is influenced, and bonding points appear on the composite nano fibers.
The temperature of the water bath heating was 70 ℃. Too high a temperature easily volatilizes the solvent too fast to cause the system to have a bonding point; too low a temperature easily results in too high a viscosity of the solution.
The electrostatic spinning parameters are as follows: the voltage was 35kV, the solution flow rate was 2mL/h, and the receiving distance was 10 cm.
The application of the composite nanofiber material is characterized in that after active ingredients and the composite nanofiber material are mixed according to the mass ratio of 4:1, fatty alcohol-polyoxyethylene ether and wetting agent ethanol are added, and the mixture is directly introduced into a mold to be pressed and molded to obtain the slow-release toilet cleaning block.
The active ingredients include anhydrous sodium sulphate, sodium bicarbonate, sodium dodecylbenzene sulphonate, dodecylbenzene sulphonic acid, sodium stearate, a hueing agent and sodium silicate.
The invention has the beneficial effects that: (1) hydroxypropyl methyl cellulose ether, polyvinyl alcohol and sodium alginate are used as raw materials, and the hydroxypropyl methyl cellulose ether/polyvinyl alcohol/sodium alginate nanofiber composite material is prepared by an electrostatic spinning technology, so that the preparation process is simple in step and low in cost;
(2) the hydroxypropyl methyl cellulose ether/polyvinyl alcohol/sodium alginate nanofiber composite material is applied to the slow-release toilet cleaning block, the mechanical strength of the toilet cleaning block can be improved by fully utilizing the nanofiber composite material, the release speed of active ingredients of the toilet cleaning block is reduced, the release speed uniformity of the active ingredients is improved, the service life of the toilet cleaning block is prolonged, and the toilet cleaning effect is guaranteed.
Drawings
FIG. 1 is a Scanning Electron Microscope (SEM) image of a nanofiber composite prepared according to example 1 of the present invention;
FIG. 2 is a Transmission Electron Microscopy (TEM) image of a nanofiber composite prepared according to example 1 of the present invention.
Detailed Description
The invention is further described with reference to the accompanying drawings and the detailed description below:
the hydroxypropyl methyl cellulose ether used in the invention is prepared by the following method:
the preparation process of hydroxypropyl methyl cellulose ether (HPMC) comprises the following steps: weighing 1000 parts of refined cotton, and crushing to obtain refined cotton powder with the fineness of 120 meshes; adding 600 parts of caustic soda flakes, 7650 part of toluene, 1080 parts of isopropanol and 270 parts of water into a reaction container to prepare alkali liquor; thirdly, adding the crushed refined cotton into alkali liquor for alkalization, controlling the temperature below 25 ℃ and the alkalization time to be 1.5 h; adding 1300 parts of methyl chloride, 200 parts of propylene oxide and 100 parts of water to carry out etherification reaction under the conditions of vacuum pumping and nitrogen protection, heating to 55 ℃, controlling the pressure to be 0.18MPa, and reacting for 1.5h, wherein the methylation reaction is mainly carried out at the stage; then heating to 85 ℃, increasing the pressure to 0.3MPa, and continuing to react for 2.5h, wherein the reaction is mainly hydroxypropylation; after the etherification reaction is finished, desolventizing the mixed material, and recycling the solvent for reuse; sixthly, after the pH value of the mixed material is adjusted to 6 to 9 by neutralization with acetic acid, water is added for washing, and separation and drying are carried out.
Example 1
The preparation process of the composite nanofiber material comprises the following steps: firstly, respectively weighing 50g of polyvinyl alcohol powder and 50g of sodium alginate powder, adding 300mL of deionized water, heating in a constant-temperature water bath at 70 ℃ for 3h, and stirring for dissolving; then, adding 150g of hydroxypropyl methyl cellulose ether, continuously stirring for 4h, cooling to room temperature to obtain a colorless transparent spinning solution, filling the spinning solution into a feeding system, processing by using an electrostatic spinning device to prepare primary fibers, and then performing vacuum drying for 48h, wherein the electrostatic spinning parameters are as follows: the voltage is 35kV, the flow rate of the solution is 2mL/h, and the receiving distance is 10 cm; and finally, placing the primary fiber after vacuum drying in a closed oven for heat treatment at 110 ℃ for 6h, and cooling to room temperature to obtain the composite nanofiber material.
As can be seen from fig. 1 and 2, the composite nanofiber material prepared in example 1 had uniform fiber diameter distribution and no inter-fiber adhesion phenomenon.
Application of the composite nanofiber material:
mixing 32% of anhydrous sodium sulphate, 16% of sodium bicarbonate, 14% of sodium dodecyl benzene sulfonate, 3% of dodecylbenzene sulfonic acid, 3% of sodium stearate, 2% of toner and 10% of sodium silicate with 20% of the composite nano-fiber material prepared in the embodiment 1 by mass percentage to obtain a primary mixture, adding fatty alcohol-polyoxyethylene ether and wetting agent ethanol, directly introducing into a mold, and pressing to form to obtain the slow-release toilet cleaning block A, wherein the mass ratio of the primary mixture to the fatty alcohol-polyoxyethylene ether to the ethanol is 98:1: 1.
Example 2
The preparation process of the composite nanofiber material comprises the following steps: firstly, respectively weighing 50g of polyvinyl alcohol powder and 100g of sodium alginate powder, adding 400mL of deionized water, heating in a constant-temperature water bath at 70 ℃ for 3h, and stirring for dissolving; then, 200g of hydroxypropyl methyl cellulose ether is added and continuously stirred for 4 hours, the mixture is cooled to room temperature to obtain a colorless and transparent spinning solution, the spinning solution is filled into a feeding system, an electrostatic spinning device is adopted to process and prepare primary fiber, and then vacuum drying is carried out for 48 hours, wherein the electrostatic spinning parameters are as follows: the voltage is 35kV, the flow rate of the solution is 2mL/h, and the receiving distance is 10 cm; and finally, placing the primary fiber after vacuum drying in a closed oven for heat treatment at 110 ℃ for 6h, and cooling to room temperature to obtain the composite nanofiber material.
Application of the composite nanofiber material:
mixing 32% of anhydrous sodium sulphate, 16% of sodium bicarbonate, 14% of sodium dodecyl benzene sulfonate, 3% of dodecylbenzene sulfonic acid, 3% of sodium stearate, 2% of toner and 10% of sodium silicate with 20% of the composite nano-fiber material prepared in the embodiment 2 by mass percentage to obtain a primary mixture, adding fatty alcohol-polyoxyethylene ether and wetting agent ethanol, directly introducing into a mold, and pressing to form to obtain the slow-release toilet cleaning block B, wherein the mass ratio of the primary mixture to the fatty alcohol-polyoxyethylene ether to the ethanol is 98:1: 1.
Example 3
The preparation process of the composite nanofiber material comprises the following steps: firstly, respectively weighing 50g of polyvinyl alcohol powder and 150g of sodium alginate powder, adding 500mL of deionized water, heating in a constant-temperature water bath at 70 ℃ for 3h, and stirring for dissolving; then adding 250g of hydroxypropyl methyl cellulose ether, continuously stirring for 4h, cooling to room temperature to obtain a colorless transparent spinning solution, filling the spinning solution into a feeding system, processing by using an electrostatic spinning device to prepare primary fibers, and then performing vacuum drying for 48h, wherein the electrostatic spinning parameters are as follows: the voltage is 35kV, the flow rate of the solution is 2mL/h, and the receiving distance is 10 cm; and finally, placing the primary fiber after vacuum drying in a closed oven for heat treatment at 110 ℃ for 6h, and cooling to room temperature to obtain the composite nanofiber material.
Application of the composite nanofiber material:
mixing 32% of anhydrous sodium sulphate, 16% of sodium bicarbonate, 14% of sodium dodecyl benzene sulfonate, 3% of dodecylbenzene sulfonic acid, 3% of sodium stearate, 2% of toner and 10% of sodium silicate with 20% of the composite nano-fiber material prepared in the embodiment 1 by mass percentage to obtain a primary mixture, adding fatty alcohol-polyoxyethylene ether and wetting agent ethanol, directly introducing into a mold, and pressing to form to obtain the slow-release toilet cleaning block C, wherein the mass ratio of the primary mixture to the fatty alcohol-polyoxyethylene ether to the ethanol is 98:1: 1.
Comparative example: mixing 32% of anhydrous sodium sulphate, 16% of sodium bicarbonate, 14% of sodium dodecyl benzene sulfonate, 3% of dodecylbenzene sulfonic acid, 3% of sodium stearate, 2% of toner, 10% of sodium silicate and 20% of hydroxypropyl methyl cellulose ether by mass percentage to obtain a primary mixture, adding fatty alcohol-polyoxyethylene ether and wetting agent ethanol, directly introducing into a mould, and pressing to form to obtain the slow-release toilet cleaning block D, wherein the mass ratio of the primary mixture to the fatty alcohol-polyoxyethylene ether to the ethanol is 98:1: 1.
The slow-release toilet cleaning block A, the slow-release toilet cleaning block B, the slow-release toilet cleaning block C and the slow-release toilet cleaning block D are subjected to a toilet cleaning flushing test under the same condition, the using effect of the slow-release toilet cleaning blocks is contrastingly researched, namely, each slow-release toilet cleaning block is placed in a water tank, the flushing test is carried out after 3 days, the toilet cleaning is carried out once every 1 hour, and the flushing test result is shown in a table 1. Known from table 1, slowly-releasing toilet cleaning piece A, slowly-releasing toilet cleaning piece B, the used repeatedly number of times and the live time of slowly-releasing toilet cleaning piece C are far greater than slowly-releasing toilet cleaning piece D, and the degree of collapsing is far less than slowly-releasing toilet cleaning piece D, consequently, the conclusion can be drawn, hydroxypropyl methyl cellulose ether/polyvinyl alcohol/sodium alginate nanofiber composite's interpolation, can improve toilet cleaning piece's mechanical strength, make it be difficult for collapsing, and can slow down toilet cleaning piece active ingredient's release rate, promote active ingredient's release rate homogeneity, the life of toilet cleaning piece has been prolonged, the toilet cleaning effect has been guaranteed.
Number of repeated use Degree of collapse Maximum service time
Toilet cleaning block A 980 24.5％ 85 days
Toilet cleaning block B 972 23.5％ 84 days
Toilet cleaning block C 975 25.9％ 80 days
Toilet cleaning block D 740 93％ 58 days
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (7)

1. A preparation method of a composite nanofiber material is characterized by comprising the following steps: the method comprises the following steps: firstly, weighing polyvinyl alcohol powder and sodium alginate powder according to a proportion, adding deionized water, heating in a water bath, and stirring for dissolving; then adding hydroxypropyl methyl cellulose ether, continuously stirring for 4h, cooling to room temperature to obtain a colorless transparent spinning solution, filling the spinning solution into a feeding system, preparing primary fibers by processing of an electrostatic spinning device, and then drying in vacuum for 48 h; and finally, placing the primary fiber after vacuum drying in a closed oven for heat treatment at 110 ℃ for 6h, and cooling to room temperature to obtain the composite nanofiber material.
2. The method of claim 1, wherein the nanofiber composite is prepared by the following steps: the mass ratio of the polyvinyl alcohol powder to the sodium alginate powder is 1: 1-3.
3. The method of claim 1, wherein the nanofiber composite is prepared by the following steps: the mass ratio of the polyvinyl alcohol powder to the hydroxypropyl methyl cellulose ether is 1: 3-5.
4. The method of claim 1, wherein the nanofiber composite is prepared by the following steps: the temperature of the water bath heating was 70 ℃.
5. The method of claim 1, wherein the nanofiber composite is prepared by the following steps: the electrostatic spinning parameters are as follows: the voltage was 35kV, the solution flow rate was 2mL/h, and the receiving distance was 10 cm.
6. Use of a composite nanofiber material prepared according to any one of claims 1 to 5, characterized in that: mixing the active ingredients with the composite nanofiber material according to the mass ratio of 4:1, adding fatty alcohol-polyoxyethylene ether and wetting agent ethanol, and directly introducing into a mold for pressing and molding to obtain the slow-release toilet cleaning block.
7. Use of a composite nanofiber material according to claim 6, wherein: the active ingredients include anhydrous sodium sulphate, sodium bicarbonate, sodium dodecylbenzene sulphonate, dodecylbenzene sulphonic acid, sodium stearate, a hueing agent and sodium silicate.
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