CN111621983A - Membrane silk moisturizing composition, and preparation method and application thereof - Google Patents

Membrane silk moisturizing composition, and preparation method and application thereof Download PDF

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Publication number
CN111621983A
CN111621983A CN201910146730.5A CN201910146730A CN111621983A CN 111621983 A CN111621983 A CN 111621983A CN 201910146730 A CN201910146730 A CN 201910146730A CN 111621983 A CN111621983 A CN 111621983A
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membrane
moisturizing composition
sodium
membrane silk
surfactant
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龚烨霞
陈承
王强
倪澄峰
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Ningbo Fotile Kitchen Ware Co Ltd
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Ningbo Fotile Kitchen Ware Co Ltd
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    • D06M2101/16—Synthetic fibres, other than mineral fibres
    • D06M2101/18—Synthetic fibres consisting of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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    • D06M2101/18—Synthetic fibres consisting of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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    • D06M2101/16—Synthetic fibres, other than mineral fibres
    • D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds

Abstract

The invention discloses a film silk moisturizing composition, and a preparation method and application thereof. The membrane silk moisturizing composition comprises the following components in percentage by mass: 1-20% of sodium salt humectant, 0.1-0.5% of sodium bisulfite, 1-5% of surfactant and the balance of water. The membrane silk moisturizing composition disclosed by the invention is good in moisturizing effect, has a bacteriostatic effect, has the advantages of short washing time, high production efficiency and low production cost when being applied to membrane silk production, can be recycled, and is green and environment-friendly.

Description

Membrane silk moisturizing composition, and preparation method and application thereof
Technical Field
The invention relates to a film silk moisturizing composition, a preparation method and application thereof.
Background
In the production process of the hollow fiber membrane module, wet membrane filaments need to be dried and then subjected to membrane module casting so as to ensure effective curing of glue. The hollow fiber membrane which is not treated by the humectant is easy to tighten and contract in the drying process, and the flux of the membrane component is reduced or even lost due to the hydrophobicity of the organic polymer material. In order to solve the above problems, it is usually necessary to add a humectant before the membrane module is cast to maintain the flux of the membrane module.
Glycerol is the most common humectant at present, and can ensure that membrane filaments still keep good flux after being dried, but glycerol has viscosity, is easy to adhere membrane filaments together, is easy to absorb water, deteriorates and infects bacteria, is difficult to wash clean, and generally needs to be washed by pure water for about one week to ensure that organic matters are dissolved out within a required range. This seriously affects the production schedule and the consumption of hydroelectric energy is large.
Disclosure of Invention
Aiming at the defects of difficult flushing and poor anti-burning performance of the membrane silk moisturizing composition in the prior art, the invention provides the membrane silk moisturizing composition, and the preparation method and the application thereof.
The invention solves the technical problems through the following technical scheme.
The invention provides a membrane silk moisturizing composition, which comprises the following components in percentage by mass:
Figure BDA0001980268880000011
Figure BDA0001980268880000021
the sodium salt humectant is one or more of sodium hyaluronate, sodium acetate and sodium lactate.
In the present invention, preferably, the sodium salt humectant is a composition of sodium acetate and sodium lactate, a composition of sodium hyaluronate and sodium acetate, sodium hyaluronate, sodium acetate or sodium lactate.
In the present invention, the surfactant may be a surfactant conventional in the art, and preferably, the surfactant is one or more of an anionic surfactant (e.g., sodium lauryl sulfate), a cationic surfactant (e.g., octadecyl trimethyl ammonium chloride), a zwitterionic surfactant (e.g., dodecyl dimethyl betaine, cocamidopropyl betaine), and a nonionic surfactant; more preferably, the surfactant is one or more of dodecyl dimethyl betaine, sodium dodecyl sulfate, octadecyl trimethyl ammonium chloride and cocamidopropyl betaine. According to the invention, by adding the surfactant, the moisturizing effect of the membrane yarn is improved, and the wettability of the membrane yarn moisturizing composition on the surface of the membrane yarn is improved, namely the easiness in cleaning is improved.
In the invention, preferably, the membrane silk moisturizing composition consists of the following components in percentage by mass: 1-20% of a sodium salt humectant (such as a composition of sodium acetate and sodium lactate, a composition of sodium hyaluronate and sodium acetate, sodium hyaluronate, sodium acetate or sodium lactate), 0.1-0.5% of sodium bisulfite, 1-5% of a surfactant (such as dodecyl dimethyl betaine, sodium dodecyl sulfate, octadecyl trimethyl ammonium chloride or cocamidopropyl betaine), and the balance of water.
In the membrane silk moisturizing composition, the content of the sodium salt moisturizing agent is preferably 1-12% by mass; more preferably, the sodium salt humectant is 5-12% (e.g., 5%, 8%, 10%, 11% or 12%) by mass.
In the membrane silk moisturizing composition, the sodium bisulfite is preferably contained in an amount of 0.1 to 0.4% (e.g., 0.1%, 0.2%, 0.3%, or 0.4%) by mass.
In the membrane silk moisturizing composition, the surfactant is preferably contained in an amount of 2 to 5% by mass (e.g., 2%, 3%, or 4%).
In the invention, preferably, the membrane silk moisturizing composition comprises the following components in percentage by mass: 1-12% of a sodium salt humectant (such as a composition of sodium acetate and sodium lactate, a composition of sodium hyaluronate and sodium acetate, sodium hyaluronate, sodium acetate or sodium lactate), 0.1-0.5% of sodium bisulfite, 1-5% of a surfactant (such as dodecyl dimethyl betaine, sodium dodecyl sulfate, octadecyl trimethyl ammonium chloride or cocamidopropyl betaine), and the balance of water.
In the invention, preferably, the membrane silk moisturizing composition comprises the following components in percentage by mass: 5-12% of a sodium salt humectant (such as a composition of sodium acetate and sodium lactate, a composition of sodium hyaluronate and sodium acetate, sodium hyaluronate, sodium acetate or sodium lactate), 0.1-0.4% of sodium bisulfite, 2-5% of a surfactant (such as dodecyl dimethyl betaine, sodium dodecyl sulfate, octadecyl trimethyl ammonium chloride or cocamidopropyl betaine), and the balance of water.
As a preferable scheme of the invention, the membrane silk moisturizing composition comprises the following components in percentage by mass: 5% sodium salt humectant (e.g. sodium acetate), 0.2% sodium bisulfite, 3% surfactant (e.g. dodecyl dimethyl betaine) and 91.8% water.
As a preferable scheme of the invention, the membrane silk moisturizing composition comprises the following components in percentage by mass: 10% sodium salt humectant (e.g. sodium hyaluronate), 0.3% sodium bisulfite, 2% surfactant (e.g. sodium lauryl sulfate) and 87.7% water.
As a preferable scheme of the invention, the membrane silk moisturizing composition comprises the following components in percentage by mass: 8% sodium salt humectant (e.g. sodium lactate), 0.1% sodium bisulfite, 3% surfactant (e.g. octadecyl trimethyl ammonium chloride) and 88.9% water.
As a preferable scheme of the invention, the membrane silk moisturizing composition comprises the following components in percentage by mass: 8% sodium salt humectant (e.g. 4% sodium lactate and 4% sodium acetate), 0.2% sodium bisulfite, 3% surfactant (e.g. cocamidopropyl betaine) and 88.8% water.
As a preferable scheme of the invention, the membrane silk moisturizing composition comprises the following components in percentage by mass: 11% sodium salt humectant (e.g. sodium lactate), 0.3% sodium bisulfite, 3% surfactant (e.g. sodium lauryl sulfate) and 85.7% water.
As a preferable scheme of the invention, the membrane silk moisturizing composition comprises the following components in percentage by mass: 10% sodium salt moisturizer (e.g. 5% sodium lactate and 5% sodium hyaluronate), 0.4% sodium bisulfite, 4% surfactant (e.g. octadecyl trimethyl ammonium chloride) and 85.6% water.
As a preferable scheme of the invention, the membrane silk moisturizing composition comprises the following components in percentage by mass: 12% sodium salt humectant (e.g. 6% sodium lactate and 6% sodium acetate), 0.3% sodium bisulfite, 3% surfactant (e.g. cocamidopropyl betaine) and 84.7% water.
As a preferable scheme of the invention, the membrane silk moisturizing composition comprises the following components in percentage by mass: 8% sodium salt humectant (e.g. 4% sodium hyaluronate and 4% sodium acetate), 0.4% sodium bisulfite, 4% surfactant (e.g. cocamidopropyl betaine) and 87.6% water.
The invention also provides a preparation method of the membrane silk moisturizing composition, which comprises the following steps: mixing the components of the membrane silk moisturizing composition.
In the preparation method, the components of the membrane silk moisturizing composition are preferably mixed at 30-40 ℃.
In the present invention, preferably, the preparation method comprises the following steps: (1) heating part of water to 30-40 ℃, adding the sodium salt humectant and the surfactant, and mixing;
(2) adding the sodium bisulfite after ultrasonic dispersion into the mixed solution obtained in the step (1), adding the rest water, and mixing;
wherein, the mass of the water used in the step (1) accounts for 30-40% of the total mass of the water used in the steps (1) and (2), and the mass is determined according to the dissolution condition of the raw materials.
The invention also provides application of the membrane silk moisturizing composition in membrane silk production.
In the application, the membrane yarn may be a membrane yarn conventional in the art, and preferably, the material of the filter element of the membrane yarn includes one or more of polyvinylidene fluoride (PVDF), polyvinyl chloride (PVC), polysulfone and Polyacrylonitrile (PAN).
In the application, preferably, the method comprises the following steps: and soaking the membrane filaments in the membrane filament moisturizing composition.
In the application, preferably, the soaking time is 12 hours.
In the application, the membrane filaments are soaked by the membrane filament moisturizing composition and then taken out, so that conventional drying treatment can be carried out, and then a membrane component can be further manufactured.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The reagents and starting materials used in the present invention are commercially available.
The positive progress effects of the invention are as follows:
1. the membrane silk treated by the membrane silk moisturizing composition is used for manufacturing the membrane component, after the membrane component is used, the flushing time of the membrane component is greatly shortened on the premise of ensuring the flux, compared with the conventional humectant glycerin, the flushing time required for flushing the membrane component until the dissolved COD of organic matters is less than or equal to 2.0 is reduced from about 1 week to 24 hours, the production efficiency is greatly improved, and the production cost is reduced.
2. The film silk moisturizing composition disclosed by the invention has the advantages that the moisturizing effect is improved by adding the surfactant, the wettability of the film silk moisturizing composition on the surface of the film silk is improved, and the film silk moisturizing composition is washed more quickly.
3. The addition of the sodium bisulfite in the membrane silk moisturizing composition not only improves the oxidation resistance of the membrane silk moisturizing composition, but also plays a role in bacteriostasis.
4. The glycerin is used as the humectant to achieve the moisturizing effect, the concentration content is high, the required moisturizing effect can be achieved by using the sodium salt humectant with low concentration, and the humectant is more green and environment-friendly.
5. The film silk moisturizing composition can be automatically supplemented by monitoring the concentration in the using process, so that the recycling and the reutilization are realized, and the environment is protected.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention. The experimental methods without specifying specific conditions in the following examples were selected according to the conventional methods and conditions, or according to the commercial instructions.
Example 1
In a cleaning pool, preparing a film silk moisturizing composition from sodium acetate, water, sodium bisulfite and dodecyl dimethyl betaine according to a mass ratio of 5:91.8:0.2:3 at a water temperature of 40 ℃, and specifically comprising the following steps: weighing sodium acetate, water, sodium bisulfite and alkyl dimethyl betaine according to a proportion; heating a part of pure water to 40 ℃ at a constant temperature, adding sodium acetate and alkyl dimethyl betaine, stirring and mixing uniformly, carrying out ultrasonic treatment on sodium bisulfite in an ultrasonic oscillator for 20 minutes, slowly adding the sodium bisulfite into a mixed solution of the sodium acetate, the alkyl dimethyl betaine and water after the sodium bisulfite is dispersed uniformly, adding the rest pure water, stirring uniformly, and cooling for use after the solution becomes a transparent and uniform solution.
And putting the whole bundle of membrane filaments into a tank filled with the prepared membrane filament moisturizing composition, soaking for 12 hours, taking out the membrane filaments, and airing for 10 hours to obtain the dry membrane filaments treated by the membrane filament moisturizing composition.
And (3) pure water flux test: 5 bundles of freshly spun membrane filaments of the same lot were randomly drawn, and the pure water flux of the membrane filaments was measured under the same test conditions, the pure water flux of the membrane filaments which were directly air-dried without any treatment was 0, and the average pure water flux of the membrane filaments which were merely immersed in pure water without any treatment (wet membrane) was 12.53L/(m.sup.53L/(m.sup.2H.bar), average pure water flux of dry membrane filaments treated with membrane filament moisturizing composition was 12.49L/(m2·h·bar)。
Organic matter dissolution COD test: taking 20 bundles of dry membrane filaments treated by the membrane filament moisturizing composition to manufacture a membrane assembly, then putting the membrane assembly into a water tank, taking water as flushing liquid, heating and circularly flushing at 35 ℃, wherein the flushing pressure is 0.1MPa, the flushing liquid is replaced every 4 hours to ensure that the concentration of impurities in the flushing liquid is maintained at a lower level, and the flushing liquid is circularly flushed for 24 hours in total, wherein the using amount of the circularly flushed liquid is 200L. Through testing, wash 24h back filter core eluate up to standard, the COD value all is less than 2, and the COD value result is surveyed by COD automatic titrator, washes through 24h, and the COD value of each membrane silk is respectively in this membrane module: 1.02, 0.76, 1.96, 1.56, 0.56, 1.34, 1.90, 1.01, 0.89, 0.93, 1.45, 1.32, 1.76, 0.78, 1.23, 1.88, 0.99, 0.82, 1.22, 1.02 mg/L.
And (3) bacteriostatic test: the whole bundle of membrane silk is put into a groove filled with the prepared membrane silk moisturizing composition, and after the membrane silk is soaked for 5 months, no obvious mildew spot is found on the membrane silk.
The membrane silk moisturizing composition is prepared according to the method, the difference is that sodium bisulfite is not contained, the whole bundle of membrane silk is put into a groove filled with the membrane silk moisturizing composition without sodium bisulfite, and after the membrane silk is soaked for 1 month, obvious mildew stains appear on the membrane silk.
Example 2
In a cleaning pool, preparing a membrane silk moisturizing composition from sodium hyaluronate, water, sodium bisulfite and sodium dodecyl sulfate according to a mass ratio of 10:87.7:0.3:2 at a water temperature of 35 ℃, and specifically comprising the following steps: weighing sodium hyaluronate, water, sodium bisulfite and sodium dodecyl sulfate in proportion; heating a part of pure water to 40 ℃ at a constant temperature, adding sodium hyaluronate and sodium dodecyl sulfate, stirring and mixing uniformly, carrying out ultrasonic treatment on sodium bisulfite in an ultrasonic oscillator for 20 minutes, slowly adding the uniformly dispersed sodium bisulfite into a mixed solution of the sodium hyaluronate, the sodium dodecyl sulfate and the water, adding the rest pure water, stirring uniformly, and cooling for use after the solution becomes a transparent and uniform solution.
And putting the whole bundle of membrane filaments into a tank filled with the prepared membrane filament moisturizing composition, soaking for 12 hours, taking out the membrane filaments, and airing for 10 hours to obtain the dry membrane filaments treated by the membrane filament moisturizing composition.
And (3) pure water flux test: 5 bundles of freshly spun membrane filaments of the same lot were randomly drawn, pure water fluxes of the membrane filaments were tested under the same test conditions, and the average pure water flux of the membrane filaments immersed in pure water alone without any treatment (wet membrane) was 12.34L/(m m.sup.2H.bar), average pure water flux of the dried membrane filaments treated with the membrane filament moisturizing composition was 12.27L/(m)2·h·bar)。
Organic matter dissolution COD test: taking 20 bundles of dry membrane filaments treated by the membrane filament moisturizing composition to manufacture a membrane assembly, then putting the membrane assembly into a water tank, taking water as flushing liquid, heating and circularly flushing at 35 ℃, wherein the flushing pressure is 0.1MPa, the flushing liquid is replaced every 4 hours to ensure that the impurity concentration in the flushing liquid is maintained at a lower level, and the flushing liquid is circularly flushed for 24 hours, wherein the total amount of the flushing liquid is 200L. Through testing, wash 24h back filter core eluate up to standard, the COD value all is less than 2, and the COD value result is surveyed by COD automatic titrator, washes through 24h, and the COD value of each membrane silk is respectively in this membrane module: 0.45, 0.58, 1.23, 1.45, 0.78, 0.98, 1.67, 1.05, 0.73, 0.55, 0.90, 1.81, 0.80, 0.55, 1.88, 1.45, 0.97, 1.46, 1.01, 0.79 mg/L.
And (3) bacteriostatic test: the whole bundle of membrane silk is put into a groove filled with the prepared membrane silk moisturizing composition, and after the membrane silk is soaked for 5 months, no obvious mildew spot is found on the membrane silk.
The membrane silk moisturizing composition is prepared according to the method, the difference is that sodium bisulfite is not contained, the whole bundle of membrane silk is put into a groove filled with the membrane silk moisturizing composition without sodium bisulfite, and after the membrane silk is soaked for 1 month, obvious mildew stains appear on the membrane silk.
Example 3
In a cleaning pool, sodium lactate, water, sodium bisulfite and octadecyl trimethyl ammonium chloride are prepared into a film yarn moisturizing composition according to the mass ratio of 8:88.9:0.1:3 at the water temperature of 30 ℃, and the method specifically comprises the following steps: weighing sodium lactate, water, sodium bisulfite and octadecyl trimethyl ammonium chloride in proportion; heating a part of pure water to 40 ℃ and keeping the temperature constant, adding sodium lactate and octadecyl trimethyl ammonium chloride, stirring and mixing uniformly, then carrying out ultrasonic treatment on sodium bisulfite in an ultrasonic oscillator for 20 minutes, slowly adding the sodium bisulfite into a mixed solution of the sodium lactate, the octadecyl trimethyl ammonium chloride and water after the sodium bisulfite is dispersed uniformly, adding the rest pure water, stirring uniformly until the solution becomes a transparent and uniform solution, and cooling for use.
And putting the whole bundle of membrane filaments into a tank filled with the prepared membrane filament moisturizing composition, soaking for 12 hours, taking out the membrane filaments, and airing for 10 hours to obtain the dry membrane filaments treated by the membrane filament moisturizing composition.
And (3) pure water flux test: 5 bundles of freshly spun membrane filaments of the same lot were randomly drawn, pure water fluxes of the membrane filaments were tested under the same test conditions, and the average pure water flux of the membrane filaments immersed in pure water alone without any treatment (wet membrane) was 12.61L/(m m.f.)2H.bar), average pure water flux of dry membrane filaments treated with membrane filament moisturizing composition was 12.55L/(m)2·h·bar)。
Organic matter dissolution COD test: taking 20 bundles of dry membrane filaments treated by the membrane filament moisturizing composition to manufacture a membrane assembly, then putting the membrane assembly into a water tank, taking water as flushing liquid, heating and circularly flushing at 40 ℃, wherein the flushing pressure is 0.1MPa, the flushing liquid is replaced every 4 hours to ensure that the impurity concentration in the flushing liquid is maintained at a lower level, and the flushing liquid is circularly flushed for 24 hours, wherein the total amount of the flushing liquid is 200L. Through testing, wash 24h back filter core eluate up to standard, the COD value all is less than 2, and the COD value result is surveyed by COD automatic titrator, washes through 24h, and the COD value of each membrane silk is respectively in this membrane module: 0.78, 0.34, 1.94, 1.67, 1.31, 0.99, 1.23, 1.77, 1.00, 0.89, 0.44, 0.50, 0.89, 1.02, 1.29, 0.61, 1.22, 1.07, 0.66, 0.90 mg/L.
And (3) bacteriostatic test: the whole bundle of membrane silk is put into a groove filled with the prepared membrane silk moisturizing composition, and after the membrane silk is soaked for 5 months, no obvious mildew spot is found on the membrane silk.
The membrane silk moisturizing composition is prepared according to the method, the difference is that sodium bisulfite is not contained, the whole bundle of membrane silk is put into a groove filled with the membrane silk moisturizing composition without sodium bisulfite, and after the membrane silk is soaked for 1 month, obvious mildew stains appear on the membrane silk.
Example 4
In a cleaning pool, sodium lactate, sodium acetate, water, sodium bisulfite and cocamidopropyl betaine are mixed according to the mass ratio of 4: 4: 88.8: 0.2:3 preparing a membrane silk moisturizing composition at the water temperature of 35 ℃, and specifically comprising the following steps: weighing sodium lactate, sodium acetate, water, sodium bisulfite and cocamidopropyl betaine according to a proportion; heating a part of pure water to 40 ℃ and keeping the temperature constant, adding sodium lactate, sodium acetate and cocamidopropyl betaine, stirring and mixing uniformly, carrying out ultrasonic treatment on sodium bisulfite in an ultrasonic oscillator for 20 minutes, dispersing the sodium bisulfite uniformly, slowly adding the sodium bisulfite into a mixed solution of the sodium lactate, the sodium acetate, the cocamidopropyl betaine and water, adding the rest pure water, stirring uniformly, and cooling for use after the solution becomes a transparent and uniform solution.
And putting the whole bundle of membrane filaments into a tank filled with the prepared membrane filament moisturizing composition, soaking for 12 hours, taking out the membrane filaments, and airing for 10 hours to obtain the dry membrane filaments treated by the membrane filament moisturizing composition.
And (3) pure water flux test: 5 bundles of freshly spun membrane filaments of the same lot were randomly drawn, pure water fluxes of the membrane filaments were tested under the same test conditions, and the average pure water flux of the membrane filaments immersed in pure water alone without any treatment (wet membrane) was 12.50L/(m of membrane filaments2H.bar), average pure water flux of dry membrane filaments treated with membrane filament moisturizing composition was 12.47L/(m)2·h·bar)。
Organic matter dissolution COD test: taking 20 bundles of dry membrane filaments treated by the membrane filament moisturizing composition to manufacture a membrane assembly, then putting the membrane assembly into a water tank, taking water as flushing liquid, heating and circularly flushing at 40 ℃, wherein the flushing pressure is 0.1MPa, the flushing liquid is replaced every 4 hours to ensure that the impurity concentration in the flushing liquid is maintained at a lower level, and the flushing liquid is circularly flushed for 24 hours, wherein the total amount of the flushing liquid is 200L. Through testing, wash 24h back filter core eluate up to standard, the COD value all is less than 2, and the COD value result is surveyed by COD automatic titrator, washes through 24h, and the COD value of each membrane silk is respectively in this membrane module: 1.11, 1.29, 0.78, 1.33, 1.45, 0.96, 0.83 and 0.71 mg/L.
And (3) bacteriostatic test: the whole bundle of membrane silk is put into a groove filled with the prepared membrane silk moisturizing composition, and after the membrane silk is soaked for 5 months, no obvious mildew spot is found on the membrane silk.
The membrane silk moisturizing composition is prepared according to the method, the difference is that sodium bisulfite is not contained, the whole bundle of membrane silk is put into a groove filled with the membrane silk moisturizing composition without sodium bisulfite, and after the membrane silk is soaked for 1 month, obvious mildew stains appear on the membrane silk.
Example 5
In a cleaning pool, sodium lactate, water, sodium bisulfite and sodium dodecyl sulfate are mixed according to the mass ratio of 11: 85.7: 0.3: 3 preparing the membrane silk moisturizing composition at the water temperature of 35 ℃. See example 1 for specific procedures.
And then putting the whole bundle of membrane filaments into a tank filled with the prepared membrane filament moisturizing composition, soaking for 12 hours, taking out the membrane filaments, and airing for 10 hours to obtain the dry membrane filaments treated by the membrane filament moisturizing composition.
And (3) pure water flux test: 5 bundles of freshly spun membrane filaments of the same lot were randomly drawn, pure water fluxes of the membrane filaments were tested under the same test conditions, and the average pure water flux of the membrane filaments immersed in pure water alone without any treatment (wet membrane) was 12.42L/(m m.sup.2H.bar), average pure water flux of 11.98L/(m) for dry membrane filaments treated with membrane filament moisturizing composition2·h·bar)。
Organic matter dissolution COD test: taking 20 bundles of dry membrane filaments treated by the membrane filament moisturizing composition to manufacture a membrane assembly, then putting the membrane assembly into a water tank, taking water as flushing liquid, heating and circularly flushing at 35 ℃, wherein the flushing pressure is 0.1MPa, the flushing liquid is replaced every 4 hours to ensure that the impurity concentration in the flushing liquid is maintained at a lower level, and the flushing liquid is circularly flushed for 24 hours, wherein the total amount of the flushing liquid is 200L. Through testing, wash 24h back filter core eluate up to standard, the COD value all is less than 2, and the COD value result is surveyed by COD automatic titrator, washes through 24h, and the COD value of each membrane silk is respectively in this membrane module: 0.56, 0.58, 0.23, 1.04, 0.88, 0.54, 1.05, 1.03, 0.98, 0.45, 0.67, 1.00, 0.90, 0.77, 1.08, 1.03, 0.85, 0.46, 1.38, 0.59 mg/L.
And (3) bacteriostatic test: the whole bundle of membrane silk is put into a groove filled with the prepared membrane silk moisturizing composition, and after the membrane silk is soaked for 5 months, no obvious mildew spot is found on the membrane silk.
The membrane silk moisturizing composition is prepared according to the method, the difference is that sodium bisulfite is not contained, the whole bundle of membrane silk is put into a groove filled with the membrane silk moisturizing composition without sodium bisulfite, and after the membrane silk is soaked for 1 month, obvious mildew stains appear on the membrane silk.
Example 6
In a cleaning pool, sodium lactate, sodium hyaluronate, water, sodium bisulfite and octadecyl trimethyl ammonium chloride are prepared into the film silk moisturizing composition according to the mass ratio of 5:5:85.6:0.4:4 at the water temperature of 35 ℃. See example 1 for specific procedures.
And then putting the whole bundle of membrane filaments into a tank filled with the prepared membrane filament moisturizing composition, soaking for 12 hours, taking out the membrane filaments, and airing for 10 hours to obtain the dry membrane filaments treated by the membrane filament moisturizing composition.
And (3) pure water flux test: 5 bundles of freshly spun membrane filaments of the same lot were randomly drawn, pure water fluxes of the membrane filaments were tested under the same test conditions, and the average pure water flux of the membrane filaments immersed in pure water alone without any treatment (wet membrane) was 13.02L/(m)2H.bar), average pure water flux of dry membrane filaments treated with membrane filament moisturizing composition was 12.79L/(m)2·h·bar)。
Organic matter dissolution COD test: taking 20 bundles of dry membrane filaments treated by the membrane filament moisturizing composition to manufacture a membrane assembly, then putting the membrane assembly into a water tank, taking water as flushing liquid, heating and circularly flushing at 40 ℃, wherein the flushing pressure is 0.1MPa, the flushing liquid is replaced every 4 hours to ensure that the impurity concentration in the flushing liquid is maintained at a lower level, and the flushing liquid is circularly flushed for 24 hours, wherein the total amount of the flushing liquid is 200L. Through testing, wash 24h back filter core eluate up to standard, the COD value all is less than 2, and the COD value result is surveyed by COD automatic titrator, washes through 24h, and the COD value of each membrane silk is respectively in this membrane module: 1.37, 0.96, 1.29, 0.67, 0.43, 0.69, 1.11, 0.67, 1.03, 1.23, 0.37, 0.46, 0.47, 1.52, 0.29, 0.71, 0.32, 1.01, 0.78, 0.70 mg/L.
And (3) bacteriostatic test: the whole bundle of membrane silk is put into a groove filled with the prepared membrane silk moisturizing composition, and after the membrane silk is soaked for 5 months, no obvious mildew spot is found on the membrane silk.
The membrane silk moisturizing composition is prepared according to the method, the difference is that sodium bisulfite is not contained, the whole bundle of membrane silk is put into a groove filled with the membrane silk moisturizing composition without sodium bisulfite, and after the membrane silk is soaked for 1 month, obvious mildew stains appear on the membrane silk.
Example 7
In a cleaning pool, sodium lactate, sodium acetate, water, sodium bisulfite and cocamidopropyl betaine are mixed according to the mass ratio of 6: 6: 84.7: 0.3: 3 preparing the membrane silk moisturizing composition at the water temperature of 35 ℃. See example 1 for specific procedures.
And then putting the whole bundle of membrane filaments into a tank filled with the prepared membrane filament moisturizing composition, soaking for 12 hours, taking out the membrane filaments, and airing for 10 hours to obtain the dry membrane filaments treated by the membrane filament moisturizing composition.
And (3) pure water flux test: 5 bundles of freshly spun membrane filaments of the same lot were randomly drawn, pure water fluxes of the membrane filaments were tested under the same test conditions, and the average pure water flux of the membrane filaments immersed in pure water alone without any treatment (wet membrane) was 12.77L/(m m.f.)2H.bar), average pure water flux of dry membrane filaments treated with membrane filament moisturizing composition was 12.54L/(m)2·h·bar)。
Organic matter dissolution COD test: taking 20 bundles of dry membrane filaments treated by the membrane filament moisturizing composition to manufacture a membrane assembly, then putting the membrane assembly into a water tank, taking water as flushing liquid, heating and circularly flushing at 40 ℃, wherein the flushing pressure is 0.1MPa, the flushing liquid is replaced every 4 hours to ensure that the impurity concentration in the flushing liquid is maintained at a lower level, and the flushing liquid is circularly flushed for 24 hours, wherein the total amount of the flushing liquid is 200L. Through testing, wash 24h back filter core eluate up to standard, the COD value all is less than 2, and the COD value result is surveyed by COD automatic titrator, washes through 24h, and the COD value of each membrane silk is respectively in this membrane module: 1.54, 1.21, 0.87, 1.34, 1.21, 0.68, 0.33, 0.85, 1.34, 1.27, 0.47, 0.78, 1.20, 0.88, 0.71, 0.55, 1.07, 0.76, 0.93, 1.00 mg/L.
And (3) bacteriostatic test: the whole bundle of membrane silk is put into a groove filled with the prepared membrane silk moisturizing composition, and after the membrane silk is soaked for 5 months, no obvious mildew spot is found on the membrane silk.
The membrane silk moisturizing composition is prepared according to the method, the difference is that sodium bisulfite is not contained, the whole bundle of membrane silk is put into a groove filled with the membrane silk moisturizing composition without sodium bisulfite, and after the membrane silk is soaked for 1 month, obvious mildew stains appear on the membrane silk.
Example 8
In a cleaning pool, hyaluronic acid, sodium acetate, water, sodium bisulfite and cocamidopropyl betaine are mixed according to a mass ratio of 4: 4: 87.6: 0.4:4 preparing the membrane silk moisturizing composition at the water temperature of 30 ℃. See example 1 for specific procedures.
And then putting the whole bundle of membrane filaments into a tank filled with the prepared membrane filament moisturizing composition, soaking for 12 hours, taking out the membrane filaments, and airing for 10 hours to obtain the dry membrane filaments treated by the membrane filament moisturizing composition.
And (3) pure water flux test: 5 bundles of freshly spun membrane filaments of the same lot were randomly drawn, pure water fluxes of the membrane filaments were tested under the same test conditions, and the average pure water flux of the membrane filaments immersed in pure water alone without any treatment (wet membrane) was 12.34L/(m m.sup.2H.bar), average pure water flux of 11.88L/(m) for dry membrane filaments treated with membrane filament moisturizing composition2·h·bar)。
Organic matter dissolution COD test: taking 20 bundles of dry membrane filaments treated by the membrane filament moisturizing composition to manufacture a membrane assembly, then putting the membrane assembly into a water tank, taking water as flushing liquid, heating and circularly flushing at 40 ℃, wherein the flushing pressure is 0.1MPa, the flushing liquid is replaced every 4 hours to ensure that the impurity concentration in the flushing liquid is maintained at a lower level, and the flushing liquid is circularly flushed for 24 hours, wherein the total amount of the flushing liquid is 200L. Through testing, wash 24h back filter core eluate up to standard, the COD value all is less than 2, and the COD value result is surveyed by COD automatic titrator, washes through 24h, and the COD value of each membrane silk is respectively in this membrane module: 0.99, 0.21, 1.56, 1.04, 0.87, 0.63, 0.54, 0.99, 1.04, 0.24, 0.54, 0.70, 1.05, 0.78, 0.76, 1.35, 1.33, 0.59, 0.98, 1.31 mg/L.
And (3) bacteriostatic test: the whole bundle of membrane silk is put into a groove filled with the prepared membrane silk moisturizing composition, and after the membrane silk is soaked for 5 months, no obvious mildew spot is found on the membrane silk.
The membrane silk moisturizing composition is prepared according to the method, the difference is that sodium bisulfite is not contained, the whole bundle of membrane silk is put into a groove filled with the membrane silk moisturizing composition without sodium bisulfite, and after the membrane silk is soaked for 1 month, obvious mildew stains appear on the membrane silk.
Comparative example 1
Compared with the example 2, the difference is that glycerin with equal proportion is adopted to replace sodium hyaluronate, and the specific steps are as follows:
in a cleaning pool, glycerol, water, sodium bisulfite and sodium dodecyl sulfate are prepared into a membrane silk moisturizing composition according to the mass ratio of 10:87.7:0.3:2 at the water temperature of 35 ℃, and the method specifically comprises the following steps: weighing glycerol, water, sodium bisulfite and sodium dodecyl sulfate in proportion; heating a part of pure water to 40 ℃ and keeping the temperature constant, adding glycerol and sodium dodecyl sulfate, stirring and mixing uniformly, carrying out ultrasonic treatment on sodium bisulfite in an ultrasonic oscillator for 20 minutes, slowly adding the sodium bisulfite into a mixed solution of the glycerol, the sodium dodecyl sulfate and the water after the sodium bisulfite is dispersed uniformly, adding the rest pure water, stirring uniformly, and cooling for use after the solution becomes a transparent and uniform solution.
And putting the whole bundle of membrane filaments into a tank filled with the prepared membrane filament moisturizing composition, soaking for 12 hours, taking out the membrane filaments, airing for 24 hours, and still not completely drying, and testing the water content to be 28-35% by using a drying wet weight instrument to obtain the dry membrane filaments treated by the membrane filament moisturizing composition.
And (3) pure water flux test: 5 bundles of freshly spun membrane filaments of the same lot were randomly drawn, pure water fluxes of the membrane filaments were tested under the same test conditions, and the average pure water flux of the membrane filaments immersed in pure water alone without any treatment (wet membrane) was 12.61L/(m m.f.)2H.bar), dry films treated with film-silk moisturizing compositionsThe average pure water flux of the filaments was 8.20L/(m)2·h·bar)。
Organic matter dissolution COD test: taking 20 bundles of dry membrane filaments treated by the membrane filament moisturizing composition to manufacture a membrane assembly, then putting the membrane assembly into a water tank, taking water as flushing liquid, heating and circularly flushing at 35 ℃, wherein the flushing pressure is 0.1MPa, the flushing liquid is replaced every 4 hours to ensure that the impurity concentration in the flushing liquid is maintained at a lower level, and the flushing liquid is circularly flushed for 24 hours, wherein the total amount of the flushing liquid is 200L. Through testing, wash 24h back filter core eluate up to standard, the COD value all is less than 2, and the COD value result is surveyed by COD automatic titrator, washes through 24h, and the COD value of each membrane silk is respectively in this membrane module: 13.54, 12.98, 11.80, 8.79, 14.03, 12.23, 10.67, 12.67, 12.99, 12.11, 9.92, 10.34, 11.79, 12.77, 12.16, 10.33, 9.12, 8.13, 9.76 mg/L.

Claims (10)

1. The membrane silk moisturizing composition is characterized by comprising the following components in percentage by mass:
Figure FDA0001980268870000011
the sodium salt humectant is one or more of sodium hyaluronate, sodium acetate and sodium lactate.
2. The film filament moisturizing composition of claim 1, wherein the sodium salt moisturizer is a combination of sodium acetate and sodium lactate, a combination of sodium hyaluronate and sodium acetate, sodium hyaluronate, sodium acetate, or sodium lactate;
and/or the surfactant is one or more of an anionic surfactant, a cationic surfactant, a zwitterionic surfactant and a nonionic surfactant.
3. The membrane silk moisturizing composition of claim 1 or 2, wherein the surfactant is one or more of dodecyl dimethyl betaine, sodium lauryl sulfate, octadecyl trimethyl ammonium chloride, and cocamidopropyl betaine.
4. The membrane silk moisturizing composition as claimed in claim 1 or 2, wherein the membrane silk moisturizing composition is composed of the following components in percentage by mass:
Figure FDA0001980268870000012
5. the membrane silk moisturizing composition of claim 1 or 2, wherein the sodium salt moisturizing agent is present in an amount of 1 to 12% by weight; the mass percentage content of the sodium salt humectant is preferably 5-12%;
and/or the sodium bisulfite accounts for 0.1-0.4% by mass;
and/or the surfactant accounts for 2-5% by mass.
6. The membrane silk moisturizing composition of claim 1 or 2, wherein the membrane silk moisturizing composition comprises the following components in percentage by mass:
Figure FDA0001980268870000021
or the membrane silk moisturizing composition comprises the following components in percentage by mass:
Figure FDA0001980268870000022
7. the membrane silk moisturizing composition as claimed in claim 1 or 2, wherein the membrane silk moisturizing composition is composed of the following components in percentage by mass: 5% sodium salt humectant, 0.2% sodium bisulfite, 3% surfactant and 91.8% water;
or the membrane silk moisturizing composition comprises the following components in percentage by mass: 10% sodium salt humectant, 0.3% sodium bisulfite, 2% surfactant and 87.7% water;
or the membrane silk moisturizing composition comprises the following components in percentage by mass: 8% sodium salt humectant, 0.1% sodium bisulfite, 3% surfactant and 88.9% water;
or the membrane silk moisturizing composition comprises the following components in percentage by mass: 8% sodium salt humectant, 0.2% sodium bisulfite, 3% surfactant and 88.8% water;
or the membrane silk moisturizing composition comprises the following components in percentage by mass: 11% sodium salt humectant, 0.3% sodium bisulfite, 3% surfactant and 85.7% water;
or the membrane silk moisturizing composition comprises the following components in percentage by mass: 10% sodium salt humectant, 0.4% sodium bisulfite, 4% surfactant and 85.6% water;
or the membrane silk moisturizing composition comprises the following components in percentage by mass: 12% sodium salt humectant, 0.3% sodium bisulfite, 3% surfactant and 84.7% water;
or the membrane silk moisturizing composition comprises the following components in percentage by mass: 8% sodium salt humectant, 0.4% sodium bisulfite, 4% surfactant and 87.6% water.
8. A preparation method of a film silk moisturizing composition is characterized by comprising the following steps: mixing the components of the membrane filament moisturizing composition according to any one of claims 1 to 7.
9. Use of the film yarn moisturizing composition as claimed in any one of claims 1 to 7 in film yarn production.
10. The use according to claim 9, characterized in that said use comprises the steps of: soaking the membrane filaments in the membrane filament moisturizing composition;
and/or the material of the filter element of the membrane silk comprises one or more of polyvinylidene fluoride, polyvinyl chloride, polysulfone and polyacrylonitrile.
CN201910146730.5A 2019-02-27 2019-02-27 Membrane silk moisturizing composition, and preparation method and application thereof Pending CN111621983A (en)

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