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CN-121972013-A - Environment-friendly efficient cleaning agent for membrane materials based on environment degradation materials

CN121972013ACN 121972013 ACN121972013 ACN 121972013ACN-121972013-A

Abstract

The invention belongs to the technical field of chemical cleaning, in particular to an environment-friendly efficient cleaning agent for membrane materials based on environment degradation materials, which comprises a stimulus-responsive cleavable surfactant, a biogenic polycarboxylic acid chelating system, an environment-induced degradation accelerator, a modified biopolymer membrane layer protecting agent and a permeation enhancement auxiliary factor, wherein the controlled extinction of interfacial activity is realized by utilizing the acid-induced fracture characteristic of an acetal bond of the surfactant, and active induced degradation is realized by a microcapsule encapsulation oxidation catalytic system, so that the efficient decontamination and membrane protection are realized, the medicament degradation period is obviously shortened, and the foam impact of waste liquid on a biochemical system is thoroughly eliminated.

Inventors

  • BING YAN
  • LIU CHENG

Assignees

  • 江苏河清海晏环境有限公司

Dates

Publication Date
20260505
Application Date
20260402

Claims (10)

  1. 1. The environment-friendly efficient cleaning agent for the membrane material based on the environment degradation material is characterized by comprising the following components in parts by weight: fifteen to twenty-five parts of stimulus-responsive cleavable surfactant; Ten to twenty parts of biogenic polycarboxylic acid chelate system; five to ten parts of environment-induced degradation accelerator; three to eight parts of modified biopolymer membrane layer protectant; two to five parts of penetration enhancing cofactor; The balance being high-purity deionized water.
  2. 2. The environmentally-friendly membrane material efficient cleaning agent based on an environmentally-degradable material as claimed in claim 1, wherein the stimulus-responsive cleavable surfactant is an acetal alkyl glycoside derivative with acid-induced cleavage properties, and an acetal linkage point is arranged between a hydrophobic terminal alkyl chain and a hydrophilic terminal glycoside group in a molecular structure of the acetal alkyl glycoside derivative; The stimulus-responsive cleavable surfactant is formed by condensing linear fatty alcohol with twelve to fourteen carbon atoms and glucose monomer with acetal precursor under the condition of acid catalytic dehydration, and the weight average molecular weight of the stimulus-responsive cleavable surfactant is distributed between four hundred fifty and six hundred fifty daltons; The acetal linkages are configured to maintain chemical stability in a cleaning environment at a pH of seven to nine points five, thereby maintaining the efficacy of the surfactant in reducing interfacial tension, emulsifying organic contaminants, and stripping biofilm; when the pH value of the cleaning waste liquid is regulated to be in a range of three points, five to four points and five points, the acetal bond is subjected to rapid hydrolytic cleavage, so that a hydrophobic chain segment and a hydrophilic chain segment of molecules are physically separated, and the interfacial tension of the cleaning waste liquid is increased from twenty-eight milli-newtons per meter to more than sixty milli-newtons per meter within thirty minutes.
  3. 3. The environment-friendly membrane material efficient cleaning agent based on the environment-friendly material as claimed in claim 1, wherein the biological source polycarboxylic acid chelating system is a synergistic complexing system formed by L-glutamic acid disodium salt and iminodisuccinic acid tetrasodium salt according to a mass ratio of three to one; The complexation stability constant logarithmic value of the L-glutamic acid disodium salt for calcium ions is larger than five-point zero, and the L-glutamic acid disodium salt is used for destroying the lattice structures of calcium carbonate and calcium sulfate crystals in an inorganic scale layer on the surface of a film; The iminodisuccinic acid tetrasodium salt is used for enhancing the salt containing capacity of a system under an alkaline condition, and forms chelate with transition metal iron ions and manganese ions with high stability constant, so that dissolved metal ions are prevented from secondary precipitation in the circulation process of the cleaning liquid; the biological source polycarboxylic acid chelating system has a biological degradation rate of more than ninety five percent in twenty-eight days in a receiving water body.
  4. 4. The environmentally friendly membrane material efficient cleaning agent based on the environmental degradation material of claim 2, wherein the environmental induced degradation accelerator is a slow release oxidation catalytic system based on a microcapsule packaging technology, comprising: A cellulose acetate phthalate coating as an outer shell of the microcapsule, having pH sensitivity, configured to remain intact in neutral and alkaline environments, and to dissolve and release in acidic environments; the porous nano silicon dioxide carrier is arranged inside the cellulose acetate phthalate coating layer, and the pore diameter of the porous nano silicon dioxide carrier is distributed between ten and twenty nanometers; Peroxidase, loaded in the pores of the porous nano silicon dioxide carrier, and used for catalyzing and decomposing organic pollutant molecular chains by using dissolved oxygen in the waste liquid; the nano-scale titanium dioxide powder is loaded on the porous nano-silica carrier, has an average particle size of twenty nanometers, and is configured to generate hydroxyl free radicals under the irradiation of a receiving environment, and mineralize the residual chain segments after the surfactant is cracked.
  5. 5. The environmentally friendly membrane material efficient cleaner based on environmentally degradable material of claim 4, wherein said peroxidase has tolerance screening characteristics configured to maintain an initial activity of eighty percent or more over a range of pH three to nine and temperature five to fifty degrees celsius; The environment-induced degradation accelerator is configured to trigger dissolution of the cellulose acetate phthalate coating by adjusting a pH value at a conditioning stage after the cleaning waste liquid is discharged, thereby completing active induced degradation of organic pollutants and surfactant residual segments within forty-eight hours.
  6. 6. The environment-friendly type membrane material efficient cleaning agent based on the environment degradation material as claimed in claim 1, wherein the modified biopolymer membrane layer protecting agent is chitosan quaternary ammonium salt modified by carboxymethylation, and the carboxymethylation substitution degree is controlled between zero point six and zero point eight; The quaternary ammonium cationic groups on the molecular chain of the modified biopolymer membrane layer protectant are configured to generate electrostatic adsorption with the negatively charged membrane surface, and a transient hydration protective layer with the thickness of nanometer grade is formed on the membrane material surface so as to buffer the chemical erosion of the strong cleaning component to the membrane polyamide layer and occupy the active sites on the membrane surface; The modified biopolymer membrane layer protective agent is washed and removed along with water flow after the cleaning is finished, and does not remain in membrane pores.
  7. 7. The environment-friendly membrane material efficient cleaning agent based on the environment-friendly material as claimed in claim 1, wherein the permeation enhancement auxiliary factor is a mixture of low-molecular-weight fatty alcohol polyoxyethylene ether sodium sulfate and isomeric polyoxyethylene dodecanol ether according to a mass ratio of one to one; the isomeric decaol polyoxyethylene ether has an isomeric branched chain structure, and is configured to reduce the dynamic viscosity of the cleaning liquid by breaking the hydrogen bond network of water molecules on the surface of the membrane, so that the cleaning liquid permeates to the interface contact position of the pollutant and the membrane material to generate swelling effect, and the dirt is decomposed into suspended particles.
  8. 8. The environmentally friendly efficient cleaning agent for membrane materials based on environmental degradation materials of claim 1, wherein the efficient cleaning agent is prepared into an aqueous solution with a mass fraction of one to three percent when the efficient cleaning agent is applied to cleaning of membrane components; When the printing and dyeing wastewater recycling film is treated, the solubilizing capability of dye molecules is enhanced by increasing the proportion of long-chain alkyl glycoside in the component; When the inorganic scale pollution of the sea water desalination system is treated, the mass ratio of the iminodisuccinic acid tetrasodium salt in the biological source polycarboxylic acid chelating system is enhanced.
  9. 9. The preparation process of the environment-friendly type membrane material efficient cleaning agent based on the environment-friendly type membrane material is applicable to the environment-friendly type membrane material efficient cleaning agent based on the environment-friendly type membrane material as claimed in any one of claims 1 to 8, and is characterized by comprising the following steps: adding a preset portion of high-purity deionized water into a reaction kettle, starting stirring and heating, and controlling the water temperature to be forty-five ℃; Sequentially adding a biological source polycarboxylic acid chelating system and a modified biopolymer membrane layer protective agent under the condition that the stirring rotating speed is three hundred to five hundred revolutions per minute, and continuously stirring for thirty minutes until the solution presents a transparent and clear state; Step three, stirring is quickly carried out to eight hundred revolutions per minute, a stimulus response type cleavable surfactant is slowly dripped, the molecules of the surfactant are ensured to be uniformly distributed in a water phase by utilizing a shearing force, and the temperature fluctuation in a monitoring kettle is not more than two ℃ in the dripping process; Adding an environment-induced degradation accelerator and a permeation enhancement auxiliary factor under the constant temperature condition, and continuously maintaining low-speed steady flow stirring for one hour; and fifthly, filtering the obtained product by a precise filter with the filtering precision of five micrometers, and filling after confirming the characteristic peak of the functional group by on-line infrared spectrum scanning.
  10. 10. The process for preparing the environment-friendly membrane material efficient cleaning agent based on the environment-friendly membrane material efficient cleaning agent is characterized in that in the second step, a biological source polycarboxylic acid chelating system adopts a batch input mode, and the addition amount of each batch is no more than five percent of the total mass part; After step four, the cleaning agent is configured to adjust the pH to four-point zero by adding citric acid or formic acid to the waste liquid when entering the waste liquid disposal link, to instantaneously break the acetal bond of the stimulus-responsive cleavable surfactant, and trigger the microcapsule break in the environment-induced degradation accelerator to release the catalytic component.

Description

Environment-friendly efficient cleaning agent for membrane materials based on environment degradation materials Technical Field The invention belongs to the technical field of chemical cleaning, and particularly relates to an environment-friendly efficient cleaning agent for a membrane material based on an environment degradation material. Background Under the background of global water resource shortage and industrialization promotion, the membrane separation technology occupies an important strategic position in key industries such as sea water desalination, sewage reuse and the like, and processes such as reverse osmosis, ultrafiltration and the like can effectively intercept impurities in water, but in long-term operation, membrane interfaces can generate performance attenuation due to organic pollution, biological membranes and inorganic scale accumulation, so that the membrane flux is reduced, the operating pressure is increased dramatically, the membrane life is shortened and the operation and maintenance cost is increased; The periodic chemical cleaning in membrane water treatment is a standard procedure, the existing main stream cleaning agent contains components such as strong acid, strong alkali, EDTA and phosphate, and the like, and although the detergent effect can be realized by complexing scale ions, the phosphate is easy to cause eutrophication of water, EDTA is difficult to be degraded by microorganisms, and heavy metal secondary migration is easy to be induced, so that the strict environmental protection regulation requirement is violated. Although the environment-friendly cleaning agent with natural sources such as APG and the like explored in the industry has the advantage of biocompatibility, secondary foam pollution can be generated after the cleaning agent is discharged to interfere the efficiency of a downstream biochemical treatment system, the degradation process of the cleaning agent is passively dependent on environmental factors, and the cleaning agent is easy to accumulate under extreme working conditions, so that contradiction that the cleaning agent is difficult to reconcile between the cleaning efficiency and the treatment controllability exists, and the industrial actual requirements cannot be met. Therefore, the invention provides an environment-friendly efficient cleaning agent for membrane materials based on environment degradation materials. Disclosure of Invention In order to overcome the deficiencies of the prior art, at least one technical problem presented in the background art is solved. The technical scheme includes that the environment-friendly efficient cleaning agent for the membrane material based on the environment-friendly efficient cleaning agent comprises fifteen parts to twenty parts of stimulus-responsive cleavable surfactant, ten parts to twenty parts of biological source polycarboxylic acid chelating system, five parts to ten parts of environment-induced degradation accelerator, three parts to eight parts of modified biopolymer membrane layer protecting agent, two parts to five parts of permeation enhancement auxiliary factor and the balance of high-purity deionized water. The stimulus-responsive cleavable surfactant is an acetal alkyl glycoside derivative with acid-induced cleavage property, and the molecular structure of the stimulus-responsive cleavable surfactant is provided with an acetal linkage point between a hydrophobic terminal alkyl chain and a hydrophilic terminal glycoside group; The acetal bond maintains high chemical stability under neutral or weak alkaline cleaning operation environment, shows excellent effects of reducing interfacial tension, emulsifying organic pollutants and stripping biological membranes, when an acidification medium is introduced into waste liquid to reduce the pH value to a range of three points, five to four points and five times after the cleaning process is finished, the acetal bond is subjected to rapid hydrolytic cleavage, a hydrophobic chain segment and a hydrophilic chain segment of molecules are caused to be physically separated, the dissociation of the molecular structure directly causes the disappearance of interfacial activity, the physical basis of generating persistent foam when the subsequent waste liquid enters a biochemical treatment system is eliminated from the source, the specific synthesis path of the stimulus-responsive cleavable surfactant is formed by condensing linear fatty alcohol with twelve to fourteen carbon atoms and glucose monomers with acetal precursors under the acid catalysis dehydration condition, the weight average molecular weight is distributed between four hundred fifty and six hundred fifty daltons, and the surface tension of the stimulus-responsive cleavable surfactant is lower than twenty eight millinewtons per meter at normal temperature. Preferably, the biological source polycarboxylic acid chelating system is a synergistic complexing system formed by the fact that the m