Disclosure of Invention
In order to solve the problems of high addition amount of a surfactant, high use concentration, and poor wettability and foam stability in a foam cleaning agent, the invention provides an anionic-cationic surfactant compound cleaning agent.
In order to achieve the purpose, the invention is realized by the following technical scheme:
an anion-cation surfactant compound cleaning agent comprises the following components in percentage by mol: 1-20% of anionic surfactant, 1-20% of cationic surfactant, 0-20% of pH regulator, 1-5% of hard water resisting agent, 1-10% of washing assistant, 1-10% of solubilizer, 1-20% of solvent and the balance of water.
Further, the anion-cation surfactant compound cleaning agent comprises the following components in percentage by mol: 2-15% of anionic surfactant, 2-15% of cationic surfactant, 0-20% of pH regulator, 1-5% of hard water resisting agent, 2-6% of washing assistant, 2-5% of solubilizer, 5-15% of solvent and the balance of water.
Preferably, the anion-cation surfactant compound cleaning agent comprises the following components in percentage by mol: 10% of anionic surfactant, 10% of cationic surfactant, 2% of hard water resisting agent, 2-5% of washing assistant, 2-5% of solubilizer, 8-10% of solvent and the balance of water. Wherein the pH regulator is mainly used for regulating the pH value of the solution to the range of 1-13.
Further, the molar ratio of the anionic surfactant to the cationic surfactant is 1.
Further, the anionic surfactant is one or more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, sodium alpha-alkenyl sulfonate, sodium lauryl alcohol ether sulfate and sodium dioctyl sulfosuccinate.
Further, the cationic surfactant is one or more of dodecyl trimethyl ammonium chloride, dodecyl trimethyl ammonium bromide, dodecyl trimethyl potassium sulfate ester ammonium, hexadecyl trimethyl ammonium chloride, hexadecyl trimethyl ammonium bromide, hexadecyl trimethyl potassium sulfate ester ammonium, didodecyl dimethyl diammonium chloride, ditetradecyl dimethyl diammonium chloride and didodecyl dimethyl hydroxypropyl diammonium chloride.
Preferably, the cationic surfactant includes at least any one of didodecyldimethyldiammonium chloride, ditetradecyldimethyldimethylammonium chloride and didodecyldimethylhydroxypropyldiammonium chloride.
Further, the pH regulator comprises an acidic regulator and an alkaline regulator, wherein the acidic regulator is any one or more of phosphoric acid, nitric acid, sulfuric acid, acetic acid, citric acid, sorbic acid, maleic acid, lactic acid and tartaric acid; the alkaline regulator is one or more of sodium hydroxide, potassium hydroxide, sodium bicarbonate and sodium dihydrogen phosphate.
Further, the hard water resisting agent is one or more of disodium ethylene diamine tetraacetate, sodium nitrilotriacetate, 2-butane phosphonate-1, 2, 4-tricarboxylic acid and hydroxyl ethylidene diphosphonic acid.
Further, the washing assistant is one or more of sodium citrate, sodium metasilicate, sodium epoxy succinate, urea, sodium polyacrylate and the like.
Further, the solubilizer is sodium p-toluenesulfonate or sodium cumenesulfonate.
Further, the solvent is propylene glycol methyl ether or diethylene glycol butyl ether.
The invention also discloses a preparation method of the anion-cation surfactant compound cleaning agent, which comprises the following steps:
(1) Sequentially adding an anionic surfactant and a cationic surfactant into water, and stirring until the anionic surfactant and the cationic surfactant are completely dissolved;
(2) And (2) adding the hard water resisting agent, the washing assistant, the solubilizer and the solvent into the solution obtained in the step (1), and fully mixing and homogenizing.
(3) And dissolving the pH regulator in water, and regulating to obtain the pH value required by the final cleaning agent to obtain the foam cleaning agent.
And (2) after the anionic surfactant is completely dissolved in the step (1), slowly adding the cationic surfactant, and slowly adding and stirring the cationic surfactant in the adding process.
According to the invention, an anionic-cationic surfactant system is adopted, and strong electrostatic interaction is realized between an anionic surfactant and a cationic surfactant, the electrostatic interaction can avoid reaction and activity loss through the selection and the proportion of a specific surfactant, and a synergistic effect is generated, so that the cationic-anionic surfactant has incomparable high surface activity compared with a single surfactant, and the CMC and the surface tension can be greatly reduced. Because the surface performance of the surfactant can directly influence the performance of the foam, the surface tension can be reduced by compounding the surfactant, so that the radius of bubbles is reduced, the liquid drainage speed is reduced, and the foam is more stable. Besides stable foam performance, the anion and cation surfactant compound system also has excellent wetting performance and emulsifying performance, and is used for cleaning hard surfaces, and the foam stability is good, the wetting speed is high, the emulsifying performance on grease is good, and the cleaning effect is better. Meanwhile, due to the dual functions of the stability and the wettability of the foam, the use concentration of the cleaning agent can be obviously reduced, so that the cleaning agent can achieve the same or even better cleaning efficiency under the condition of lower concentration or less use amount.
In the invention, the cationic surfactant didodecyldimethylammonium chloride and ditetradecyldimethylammonium chloride have the double performances of the dialkyl monoquaternary ammonium salt and the monoalkyl diquaternary ammonium salt surfactant, and have strong performances of emulsification, adsorption, hydrophobicity, corrosion resistance, sterilization and the like. The biquaternary ammonium salt has excellent water solubility and good bactericidal performance, can inhibit bacteria from generating drug resistance, can achieve the cleaning and bactericidal effect with lower content, and reduces the use cost. Meanwhile, the cationic surfactant has an anti-corrosion effect, cannot corrode equipment, and greatly widens the application range of the cleaning agent.
In the invention, didodecyldimethylhydroxypropyldiammonium chloride, also known as N-dodecyldiquaternary ammonium salt, is an N-alkyl diquaternary ammonium salt type cationic surfactant. In the prior art, the bactericidal property, emulsifying property and caking property of N-dodecyl biquaternary ammonium salt are generally utilized, such as bactericidal property, so that the N-dodecyl biquaternary ammonium salt is applied to the fields of deodorizers, bactericides and the like; the emulsifying property and the bonding property enable the coating to be widely applied to the fields of coatings, plastics, rubber and the like; the adsorption property makes the ore dressing widely used. The N-dodecyl biquaternary ammonium salt contains a didodecyl hydrophobic group, hydrophilic hydroxyl and a biquaternary ammonium salt, wherein the contained biquaternary ammonium salt positive charges can not lose surface activity because a large number of positive charges carried by cations exist in the cleaning agent by controlling the ratio of the cationic surfactant to the anionic surfactant. And the surfactant is mixed with a specific sodium sulfate salt type anionic surfactant, even if the surfactant and the specific sodium sulfate salt type anionic surfactant are combined, the molecular bond energy and the surface activity cannot be influenced, the respective activity of the anionic/cationic surfactant is reserved, the anionic/cationic surfactant is arranged more tightly at an interface, so that the solvent and foam are stabilized, the surface tension reducing capability is stronger, and the using amount is less.
The anion-cation surfactant compound cleaning agent and the preparation method thereof have the beneficial effects that: the anionic and cationic surfactant system is used for cleaning, has low surface tension and strong interfacial activity, has the advantages of high spreading speed on oil stains, stable foam, high wetting speed and good emulsifying effect, and solves the problems that the spreading is not completed and the cleaning agent slides down, so that the low-concentration use and the rapid and powerful cleaning can be realized.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions of the present invention will be clearly and completely described below with reference to the embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
An acidic anion-cation surfactant compound cleaning agent comprises the following components in percentage by mol: 5% of sodium dodecyl sulfate, 5% of dodecyl trimethyl ammonium chloride, 5% of hydroxy ethylidene diphosphate, 5% of urea, 5% of sodium p-toluenesulfonate, 20% of propylene glycol monomethyl ether, 5% of nitric acid, 5% of sulfuric acid and the balance of water.
The preparation method of the acid anion-cation surfactant compound cleaning agent comprises the following steps:
(1) Adding sodium dodecyl sulfate into water, stirring until the sodium dodecyl sulfate is completely dissolved, then slowly adding dodecyl trimethyl ammonium chloride into the solution, and stirring until the ammonium dodecyl sulfate is completely dissolved;
(2) Adding hydroxyethylidene diphosphonic acid, urea, sodium p-toluenesulfonate and propylene glycol monomethyl ether into the solution obtained in the step (1), and fully mixing;
(3) Adding nitric acid and sulfuric acid serving as acidic pH regulators into the mixture obtained in the step (2), and fully mixing and homogenizing to obtain the acidic foam cleaning agent.
Example 2
An acidic anion-cation surfactant compound cleaning agent comprises the following components in percentage by mol: 10% of sodium dodecyl sulfate, 10% of dodecyl trimethyl ammonium chloride, 5% of hydroxyethylidene diphosphate, 5% of urea, 5% of sodium p-toluenesulfonate, 20% of propylene glycol monomethyl ether, 5% of phosphoric acid, 5% of citric acid and the balance of water.
The preparation method of the acid anion-cation surfactant compound cleaning agent comprises the following steps:
(1) Adding sodium dodecyl sulfate into water, stirring until the sodium dodecyl sulfate is completely dissolved, then slowly adding dodecyl trimethyl ammonium chloride into the solution, and stirring until the ammonium dodecyl sulfate is completely dissolved;
(2) Adding hydroxyethylidene diphosphonic acid, urea, sodium p-toluenesulfonate and propylene glycol monomethyl ether into the solution obtained in the step (1), and fully mixing;
(3) And (3) adding an acidic pH regulator phosphoric acid and citric acid into the mixture obtained in the step (2), and fully mixing and homogenizing to obtain the acidic foam cleaning agent.
Example 3
An acidic anion-cation surfactant compound cleaning agent comprises the following components in percentage by mol: 15% of sodium dodecyl sulfate, 15% of dodecyl trimethyl ammonium chloride, 2% of 2-phosphonic acid butane-1, 2, 4-tricarboxylic acid, 5% of sodium polyacrylate, 5% of sodium p-toluenesulfonate, 10% of propylene glycol methyl ether, 5% of acetic acid and the balance of water.
The preparation method of the acid anion-cation surfactant compound cleaning agent comprises the following steps:
(1) Adding sodium dodecyl sulfate into water, stirring until the sodium dodecyl sulfate is completely dissolved, then slowly adding dodecyl trimethyl ammonium chloride into the solution, and stirring until the ammonium dodecyl sulfate is completely dissolved;
(2) Adding 2-phosphonic acid butane-1, 2, 4-tricarboxylic acid 2, sodium polyacrylate, sodium p-toluenesulfonate and propylene glycol methyl ether into the solution in the step (1), and fully mixing;
(3) And (3) adding an acidic pH regulator acetic acid into the mixture obtained in the step (2), and fully mixing and homogenizing to obtain the acidic foam cleaning agent.
Example 4
An acidic anion-cation surfactant compound cleaning agent comprises the following components in percentage by mol: 20% of sodium dodecyl sulfate, 20% of dodecyl trimethyl ammonium chloride, 2% of hydroxy ethylidene diphosphate, sodium polyacrylate, 3% of sodium cumene sulfonate, 8% of diethylene glycol butyl ether, 5% of citric acid and the balance of water.
The preparation method of the acid anionic-cationic surfactant compound cleaning agent comprises the following steps:
(1) Adding sodium dodecyl sulfate into water, stirring until the sodium dodecyl sulfate is completely dissolved, then slowly adding dodecyl trimethyl ammonium chloride into the solution, and stirring until the ammonium dodecyl sulfate is completely dissolved;
(2) Adding hydroxy ethylidene diphosphoric acid, sodium polyacrylate, sodium cumene sulfonate and diethylene glycol monobutyl ether into the solution obtained in the step (1), and fully mixing;
(3) And (3) adding an acidic pH regulator citric acid into the mixture obtained in the step (2), and fully mixing and homogenizing to obtain the acidic foam cleaning agent.
Example 5
An acidic anion-cation surfactant compound cleaning agent comprises the following components in percentage by mol: 10% of sodium dodecyl sulfate, 10% of dodecyl trimethyl ammonium chloride, 2% of hydroxyethylidene diphosphate, 5% of sodium polyacrylate, 3% of sodium cumenesulfonate, 8% of propylene glycol methyl ether, 10% of acetic acid, 10% of citric acid and the balance of water.
The preparation method of the acid anion-cation surfactant compound cleaning agent comprises the following steps:
(1) Adding sodium dodecyl sulfate into water, stirring until the sodium dodecyl sulfate is completely dissolved, then slowly adding dodecyl trimethyl ammonium chloride into the solution, and stirring until the ammonium dodecyl sulfate is completely dissolved;
(2) Adding hydroxyethylidene diphosphonic acid, sodium polyacrylate, sodium cumene sulfonate and propylene glycol monomethyl ether into the solution obtained in the step (1), and fully mixing;
(3) And (3) adding acetic acid and citric acid serving as acidic pH regulators into the mixture obtained in the step (2), and fully mixing and homogenizing to obtain the acidic foam cleaning agent.
Example 6
An acidic anion-cation surfactant compound cleaning agent comprises the following components in percentage by mol: 10% of sodium dodecyl benzene sulfonate, 10% of dodecyl trimethyl ammonium bromide, 2% of hydroxy ethylidene diphosphoric acid, 5% of sodium polyacrylate, 3% of sodium p-toluenesulfonate, 8% of propylene glycol monomethyl ether, 5% of phosphoric acid, 5% of nitric acid, 8% of sulfuric acid and the balance of water.
The preparation method of the acid anionic-cationic surfactant compound cleaning agent comprises the following steps:
(1) Adding sodium dodecyl benzene sulfonate into water, stirring until the sodium dodecyl benzene sulfonate is completely dissolved, then slowly adding dodecyl trimethyl ammonium chloride into the solution, and stirring until the sodium dodecyl benzene sulfonate is completely dissolved;
(2) Adding hydroxyethylidene diphosphonic acid, sodium polyacrylate, sodium p-toluenesulfonate and propylene glycol monomethyl ether into the solution obtained in the step (1), and fully mixing;
(3) And (3) adding phosphoric acid, nitric acid and sulfuric acid serving as acidic pH regulators into the mixture obtained in the step (2), and fully mixing and homogenizing to obtain the acidic foam cleaning agent.
Example 7
An acidic anion-cation surfactant compound cleaning agent comprises the following components in percentage by mol: 10% of alpha-sodium alkenyl sulfonate, 10% of didodecyldimethylammonium chloride, 2% of hydroxyethylidene diphosphate, 5% of sodium polyacrylate, 3% of sodium p-toluenesulfonate, 8% of propylene glycol methyl ether, 5% of phosphoric acid, 5% of nitric acid, 8% of sulfuric acid and the balance of water.
The preparation method of the acid anion-cation surfactant compound cleaning agent comprises the following steps:
(1) Adding the alpha-sodium alkenyl sulfonate into water, stirring until the alpha-sodium alkenyl sulfonate is completely dissolved, then slowly adding the dodecyl trimethyl ammonium chloride into the solution, and stirring until the dodecyl trimethyl ammonium chloride is completely dissolved;
(2) Adding hydroxyethylidene diphosphonic acid, sodium polyacrylate, sodium p-toluenesulfonate and propylene glycol monomethyl ether into the solution obtained in the step (1), and fully mixing;
(3) And (3) adding phosphoric acid, nitric acid and sulfuric acid serving as acidic pH regulators into the mixture obtained in the step (2), and fully mixing and homogenizing to obtain the acidic foam cleaning agent.
Example 8
An alkaline anionic-cationic surfactant compound cleaning agent comprises the following components in percentage by mol: 5% of lauryl alcohol ether sodium sulfate, 5% of didodecyldimethylammonium chloride, 2% of ethylene diamine tetraacetic acid, 5% of sodium citrate, 3% of sodium p-toluenesulfonate, 8% of propylene glycol monomethyl ether, 8% of sodium hydroxide and the balance of water.
The preparation method of the alkaline anionic-cationic surfactant compound cleaning agent comprises the following steps:
(1) Adding lauryl alcohol ether sodium sulfate into water, stirring until the lauryl alcohol ether sodium sulfate is completely dissolved, slowly adding didodecyldimethylammonium chloride into the solution, and stirring until the didodecyldimethylammonium chloride is completely dissolved;
(2) Adding disodium ethylene diamine tetraacetate, sodium citrate, sodium p-toluenesulfonate and propylene glycol monomethyl ether into the solution obtained in the step (1), and fully mixing and homogenizing;
(3) And (3) dissolving the alkaline pH regulator in the step (2), and fully dissolving to obtain the alkaline foam cleaning agent.
Example 9
An alkaline anionic-cationic surfactant compound cleaning agent comprises the following components in percentage by mol: 10% of sodium dodecyl sulfate, 10% of didodecyldimethylammonium chloride, 2% of ethylene diamine tetraacetic acid, 5% of sodium citrate, 3% of sodium p-toluenesulfonate, 8% of propylene glycol monomethyl ether, 8% of sodium hydroxide and the balance of water.
The preparation method of the alkaline anionic-cationic surfactant compound cleaning agent comprises the following steps:
(1) Adding sodium dodecyl sulfate into water, stirring until the sodium dodecyl sulfate is completely dissolved, slowly adding didodecyldimethylammonium chloride into the solution, and stirring until the sodium dodecyl sulfate is completely dissolved;
(2) Adding disodium ethylene diamine tetraacetate, sodium citrate, sodium p-toluenesulfonate and propylene glycol monomethyl ether into the solution obtained in the step (1), and fully mixing and homogenizing;
(3) And (3) dissolving an alkaline pH regulator sodium hydroxide in the step (2) to obtain the alkaline foam cleaning agent.
Example 10
An alkaline anionic-cationic surfactant compound cleaning agent comprises the following components in percentage by mol: 10% of sodium dodecyl sulfate, 10% of ditetradecyl dimethyl diammonium chloride, 2% of ethylene diamine tetraacetic acid, 5% of sodium citrate, 3% of sodium p-toluenesulfonate, 8% of propylene glycol monomethyl ether, 8% of potassium hydroxide and the balance of water.
The preparation method of the alkaline anionic-cationic surfactant compound cleaning agent comprises the following steps:
(1) Adding sodium dodecyl sulfate into water, stirring until the sodium dodecyl sulfate is completely dissolved, then slowly adding ditetradecyl dimethyl diammonium chloride into the solution, and stirring until the sodium dodecyl sulfate is completely dissolved;
(2) Adding disodium ethylene diamine tetraacetate, sodium citrate, sodium p-toluenesulfonate and propylene glycol monomethyl ether into the solution obtained in the step (1), and fully mixing and homogenizing;
(3) And (3) dissolving an alkaline pH regulator potassium hydroxide in the step (2) to obtain the alkaline foam cleaning agent.
Example 11
The compound cleaning agent of the alkaline anionic-cationic surfactant comprises the following components in percentage by mol: 10% of sodium dodecyl sulfate, 10% of didodecyldimethylhydroxypropyldiammonium chloride, 2% of ethylene diamine tetraacetic acid, 5% of sodium citrate, 3% of sodium p-toluenesulfonate, 8% of propylene glycol monomethyl ether, 8% of sodium bicarbonate and the balance of water.
The preparation method of the alkaline anionic-cationic surfactant compound cleaning agent comprises the following steps:
(1) Adding sodium dodecyl sulfate into water, stirring until the sodium dodecyl sulfate is completely dissolved, slowly adding didodecyldimethylhydroxypropylammonium chloride into the solution, and stirring until the sodium dodecyl sulfate is completely dissolved;
(2) Adding disodium ethylene diamine tetraacetate, sodium citrate, sodium p-toluenesulfonate and propylene glycol monomethyl ether into the solution in the step (1), fully mixing and homogenizing,
(3) And (3) dissolving an alkaline pH regulator sodium bicarbonate in the solution (2) to obtain the alkaline foam cleaning agent.
Example 12
The compound cleaning agent of the alkaline anionic-cationic surfactant comprises the following components in percentage by mol: 10% of sodium dodecyl sulfate, 10% of ammonium dodecyl trimethyl potassium sulfate ester, 2% of ethylene diamine tetraacetic acid, 5% of sodium citrate, 3% of sodium p-toluenesulfonate, 8% of propylene glycol monomethyl ether, 8% of disodium hydrogen phosphate and the balance of water.
The preparation method of the alkaline anionic-cationic surfactant compound cleaning agent comprises the following steps:
(1) Adding sodium dodecyl sulfate into water, stirring until the sodium dodecyl sulfate is completely dissolved, then slowly adding ammonium dodecyl trimethyl sulfate into the solution, and stirring until the ammonium dodecyl trimethyl sulfate is completely dissolved;
(2) Adding disodium ethylene diamine tetraacetate, sodium citrate, sodium p-toluenesulfonate and propylene glycol monomethyl ether into the solution obtained in the step (1), and fully mixing and homogenizing;
(3) And (3) dissolving an alkaline pH regulator disodium hydrogen phosphate in the step (2) to obtain the alkaline foam cleaning agent.
Example 13
The compound cleaning agent of the alkaline anionic-cationic surfactant comprises the following components in percentage by mol: 10% of sodium dodecyl sulfate, 10% of hexadecyl trimethyl ammonium chloride, 2% of ethylene diamine tetraacetic acid, 5% of sodium citrate, 3% of sodium p-toluenesulfonate, 8% of propylene glycol monomethyl ether and the balance of water.
The preparation method of the alkaline anionic-cationic surfactant compound cleaning agent comprises the following steps:
(1) Adding sodium dodecyl sulfate into water, stirring until the sodium dodecyl sulfate is completely dissolved, then slowly adding hexadecyltrimethylammonium chloride into the solution, and stirring until the ammonium hexadecyltrimethylammonium chloride is completely dissolved;
(2) Adding disodium ethylene diamine tetraacetate, sodium citrate, sodium p-toluenesulfonate and propylene glycol monomethyl ether into the solution obtained in the step (1), and fully mixing and homogenizing.
(3) And (3) dissolving an alkaline pH regulator disodium hydrogen phosphate in the step (2) to obtain the alkaline foam cleaning agent.
Comparative example 1
The composition ratio and preparation method of example 6 were followed, except that the cationic surfactant dodecyltrimethylammonium bromide was removed.
Comparative example 2
The component ratio and the preparation method of example 6 were followed, except that the anionic surfactant sodium dodecylbenzenesulfonate was removed.
Comparative example 3
The ingredient ratios and preparation method of example 6 were followed, except that the cationic surfactant dodecyltrimethylammonium bromide was replaced with the nonionic surfactant laureth alcohol.
Comparative example 4
The composition ratios and preparation methods of example 6 were followed, except that the anionic surfactant sodium dodecylbenzenesulfonate was replaced with nonionic surfactant polyoxyethylene lauryl ether.
Comparative example 5
The component ratios and preparation process of example 13 were followed, except that cetyltrimethylammonium chloride, a cationic surfactant, was removed.
Comparative example 6
The component distribution ratio and the production method of example 13 were followed, except that the anionic surfactant sodium lauryl sulfate was removed.
Comparative example 7
The component ratio and the preparation method of example 13 were followed, except that cetyltrimethylammonium chloride, which is a cationic surfactant, was replaced with laureth, which is a nonionic surfactant.
Comparative example 8
The component proportions and preparation process of example 13 were followed, except that the anionic surfactant sodium lauryl sulfate was replaced with the nonionic surfactant polyoxyethylene lauryl ether.
Comparative example 9
The composition ratios and preparation process of example 13 were followed, except that the washing aid was removed.
Evaluation of Performance
1. Foaming stability test
The foaming performance of the foam cleaning agent was tested by the Ross-mile method at a concentration of 0.25% and a temperature of 45 ℃ and the test data are shown in tables 1 and 2:
TABLE 1 determination of foam Properties of acidic foam cleaners
For acidic foam cleaning agents, examples 1-7 adopt an anion/cation compound system, the 30min foam reduction rate is lower, and the foam stability is better. Comparative example 1, using a monoanionic surfactant system, foam stability was poor although the initial foam height was high; the cation surfactant system is used alone, so that the foam height is low and the foam stability is poor; the use of anionic/nonionic surfactant or cationic/nonionic surfactant systems can improve foam height and foam stability to some extent.
TABLE 2 foam Performance test results for alkaline foam cleaners
For the alkaline foam cleaning agent, the anionic/cationic compound system is adopted in examples 8-13, the foam reduction rate is lower in 30min, and the foam stability is better.
As is clear from tables 1 and 2, the foams of the acidic foam cleaning agent and the alkaline foam cleaning agent of the present invention are more stable.
2. Determination of surface tension and detergency
The surface tension of the cleaning solutions of examples 6, 13 and comparative examples 1 to 9 was measured by adjusting the concentrations of the cleaning solutions to 0.5% at 25 ℃ using examples 6 and 13 as samples.
A blank control with increased detergency, 0.085% sulfuric acid and 0.05% sodium hydroxide as references;
refer to "QBT 4313-2012 acidic cleaning agent for food service tools and industrial equipment" acidic foam cleaning agent detergency;
refer to QBT 4314-2012 alkaline cleaners for food tools and industrial equipment for detergency of alkaline foam cleaners.
The results obtained are shown in table 3:
table 3 surface tension and detergency test results
As can be seen from table 3, the acidic foam cleaning agent and the alkaline foam cleaning agent of the present invention have low surface tension and high detergency effect. The surface tension of 0.085 percent of sulfuric acid and 0.05 percent of sodium hydroxide is high, and the decontamination effect is the worst; the single anionic surfactant system (comparative example 2) has greater detergency than the single cationic surfactant system (comparative example 3); the nonionic surfactant can improve the decontamination effect of a single surfactant system.
3. Sterilization Performance test
Taking the example 6 and the example 13 as samples, adjusting the concentrations of the cleaning solutions of the example 6, the example 13 and the comparative examples 1 to 9 to be 0.5 percent at the temperature of 25 ℃, and taking escherichia coli, staphylococcus aureus and candida albicans as test targets to test the sterilization effect, wherein the obtained data are shown in table 4;
TABLE 4 bactericidal Property test results
The sulfuric acid has a certain sterilization effect, and the sterilization effect is remarkably improved after the cationic surfactant (comparative example 2) is added. Alkali also has a bactericidal effect, and the bactericidal effect is reduced when the cleaning assistant such as alkali is removed (comparative example 9). The anion/cation compound surfactant is added into the acid or the alkali, so that the sterilization effect of the product can be improved.
4. Contact Angle testing
Important parameters of the liquid on the surface wettability of the material are that the contact angle of 0.5% diluent on a smooth stainless steel sheet is tested by adopting a dataphysics video optical contact angle measuring instrument OCA15EC, and the obtained test results are shown in figures 1 to 11.
As can be seen from FIGS. 1 to 11, the cleaning agent of the anion-cation surfactant system has smaller contact angle and better wettability than a pure nonionic-cation system and a nonionic-anion system, can quickly reach a hard surface, improves the cleaning efficiency, and has no dead angle in cleaning.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Finally, it should be noted that: the embodiments of the present invention are disclosed only as the preferred embodiments of the present invention, which are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.