Cov tshuaj surfactants (tseem hu ua cov tshuaj surfactants) yog cov tshuaj pabcuam tseem ceeb hauv kev txhim kho kev lag luam thiab kev ua liaj ua teb, nrog rau qhov zoo ntawm kev ua tiav cov txiaj ntsig zoo nrog cov tshuaj me me. Tshwj xeeb tshaj yog tom qab Tsov Rog Thoob Ntiaj Teb Zaum Ob, nrog rau kev txhim kho kev lag luam petrochemical, kev lag luam surfactant hluavtaws uas tshwm sim sai sai tau txhawb nqa kev siv cov surfactants hauv ntau qhov chaw, xws li roj av, textiles, tshuaj tua kab, kev kho mob, metallurgy, mining, machinery, kev tsim kho, txoj kev, aviation, zaub mov, kev tiv thaiv ib puag ncig, ntxuav thiab zas xim, thiab lwm yam. Tsab xov xwm no yuav tsom mus rau kev qhia txog kev siv cov surfactants ua asphalt emulsifiers hauv kev tsim kho txoj kev loj.
1. Lub ntsiab lus ntawmCov tshuaj surfactants
Cov neeg tau pom tias nyob rau hauv kev xyaum ua haujlwm ntev ntev, cov tshuaj ntawm qee yam tshuaj tuaj yeem hloov pauv qhov zoo ntawm cov tshuaj yaj txawm tias nyob rau hauv qhov tsawg heev, ua rau lawv haum rau qee qhov kev xav tau ntawm kev tsim khoom, xws li txo qhov nro ntawm qhov chaw lossis qhov nro ntawm cov tshuaj yaj, ua rau muaj kev ntub dej, ntxuav, emulsifying thiab ua npuas dej, thiab lwm yam. Xab npum, uas feem ntau siv hauv lub neej txhua hnub, yog ib qho ntawm cov tshuaj no. Ib qho tshwj xeeb ntawm cov tshuaj xws li xab npum yog tias ntxiv me ntsis rau hauv dej tuaj yeem txo qhov nro ntawm qhov chaw ntawm dej.
Nrog kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis thiab kev txhim kho ntawm kev tsim khoom, tib neeg tau ua kev tshawb fawb tob txog cov khoom thiab kev ua haujlwm ntawm cov tshuaj no thiab tau muab cov lus txhais meej ntawm surfactants. Ntawd yog, surfactant yog ib yam tshuaj uas tuaj yeem txo qhov nro ntawm qhov chaw (lossis kua-kua interfacial tension) ntawm cov kuab tshuaj (feem ntau yog dej) ntawm qhov concentration qis heev, hloov qhov xwm txheej ntawm lub cev, yog li ua rau muaj ntau yam teebmeem xws li ntub thiab tiv thaiv ntub, emulsification thiab demulsification, dispersion thiab coagulation, foaming thiab defoaming, thiab solubilization.
2. Cov yam ntxwv ntawm cov surfactants
Cov tshuaj surfactant muaj ob ntu uas muaj cov yam ntxwv sib txawv kiag li: ib ntu yog pawg lipophilic (tseem hu ua pawg hydrophobic) uas muaj kev sib raug zoo rau roj, thiab lwm ntu yog pawg hydrophilic (tseem hu ua pawg oleophobic) uas muaj kev sib raug zoo rau dej. Cov yam ntxwv ntawm cov surfactants no ua rau, thaum lawv yaj hauv dej, cov pawg hydrophilic raug rub los ntawm cov dej molecules, thaum cov pawg lipophilic raug cov dej molecules thawb. Txhawm rau kov yeej qhov xwm txheej tsis ruaj khov no, lawv yuav tsum nyob hauv qhov chaw ntawm cov kua, nrog rau cov pawg lipophilic txuas ntxiv mus rau hauv huab cua thiab cov pawg hydrophilic txuas ntxiv mus rau hauv dej.
Txawm hais tias cov yam ntxwv ntawm cov qauv ntawm cov tshuaj surfactant yog tias lawv yog cov tshuaj amphiphilic, tsis yog txhua cov tshuaj amphiphilic yog surfactants. Tsuas yog cov tshuaj amphiphilic uas muaj ib feem lipophilic ntev txaus yog cov surfactants.
Piv txwv li, hauv cov ntsev fatty acid sodium, cov tshuaj sib xyaw nrog cov pa roj carbon me me (xws li sodium formate, sodium acetate, sodium propionate, sodium butyrate, thiab lwm yam) txhua tus muaj cov pab pawg lipophilic thiab hydrophilic thiab muaj cov haujlwm saum npoo, tab sis lawv tsis ua haujlwm ua xab npum thiab yog li ntawd tsis tuaj yeem hu ua surfactants. Tsuas yog thaum tus lej ntawm cov pa roj carbon nce mus rau qee qhov xwb ces sodium fatty acids qhia txog kev ua haujlwm saum npoo thiab muaj cov khoom dav dav ntawm xab npum. Feem ntau cov roj thiab cov rog ntuj ntawm tsiaj thiab cog yog cov roj fatty acid esters uas muaj 10 txog 18 carbon atoms. Yog tias cov kua qaub no tau sib xyaw nrog pab pawg hydrophilic, lawv yuav dhau los ua surfactants nrog qee qib ntawm lipophilicity thiab hydrophilicity, thiab muaj solubility zoo.
3. Daim ntawv thov ntawm Surfactants hauvKev Tsim Kho Txoj Kev Loj
3.1.Cov tshuaj surfactants thiabcov khoom siv emulsifiers asphalt
Asphalt emulsifier yog ib hom surfactant. Cov emulsifiers thiab cov tshuaj ntxuav tes muaj cov yam ntxwv xws li adsorptivity, orientation, lub peev xwm los tsim cov colloidal ions, thiab lub peev xwm los txo qhov kev sib txhuam ntawm interfacial. Txawm li cas los xij, ua ib qho emulsifier, nws kuj yuav tsum muaj cov yam ntxwv ua zaj duab xis. Tshwj xeeb tshaj yog rau asphalt emulsifiers, lawv yuav tsum muaj alkanes nrog cov saw hlau carbon kom zoo dua los ua emulsify nrog asphalt.
3.2.Kev faib tawm ntawm cov asphalt emulsifiers
Cov emulsifiers raug faib ua hom ionic thiab tsis-ionic raws li seb cov pab pawg hydrophilic ntawm cov emulsifier molecules puas nqa cov nqi thaum cov emulsifiers yaj hauv dej. Ionic emulsifiers raug muab faib ua hom cationic, anionic, thiab amphoteric ionic vim qhov sib txawv ntawm cov nqi uas lawv cov pab pawg hydrophilic nqa tom qab ionization hauv dej.
Cov khoom siv anionic asphalt emulsifier raw khoom pheej yig thiab yooj yim nrhiav tau, thiab cov txheej txheem tsim khoom yooj yim. Yog li ntawd, cov asphalt emulsified uas tsim tawm thaum ntxov tshaj plaws yog anionic emulsified asphalt, uas feem ntau yog hom nruab nrab, thiab kuj muaj qee hom qeeb qeeb. Nws tuaj yeem siv rau kev kaw cov slurry, nkag mus, kho qhov chaw, thiab lwm yam. Txawm hais tias anionic emulsifiers muaj qhov zoo ntawm tus nqi, lawv muaj kev cuam tshuam loj rau cov khoom qub ntawm asphalt, thiab ntau yam teeb meem tshwm sim thaum lub sijhawm tsim kho. Yog li ntawd, thaum siv lawv, nws yog qhov tsim nyog los xav txog cov teebmeem ntawm tus nqi, kev tsim kho thiab qhov zoo ntawm kev tsim kho.
Cationic emulsifieraTxawm hais tias nws tsim tau lig dhau los, kev xyaum tau qhia tias nws muaj kev nplaum zoo dua rau ntau yam khoom siv hauv av, nrog rau kev tsim sai, lub zog thaum ntxov, thiab cov tshuaj tsawg. Nws tsis tsuas yog ua si rau qhov zoo ntawm cov anionic emulsifiers tab sis kuj ua rau lawv qhov tsis zoo, yog li nyiam ntau qhov kev saib xyuas txij li thaum nws txoj kev loj hlob. Cationic asphalt emulsifiers muaj ntau hom thiab ntau txoj kev faib tawm. Lawv feem ntau raug faib raws li lawv cov qauv tshuaj, thiab cov feem ntau suav nrog alkyl amines, quaternary iron salts, lignin amines, imidazolines, thiab lwm yam.
Cov tshuaj Zwitterionic emulsifier muaj ob qho tib si acidic thiab basic pawg, thiab lawv yooj yim tsim "ntsev sab hauv". Ib qho yam ntxwv ntawm cov kua dej ntawm zwitterionic emulsifiers yog tias lawv cov nqi hluav taws xob hloov pauv nrog kev hloov pauv ntawm pH. Lawv muaj peev xwm dispersion calcium muaj zog hauv dej tawv thiab sib xws zoo nrog lwm hom emulsifiers, tab sis lawv tus nqi yog siab dua.
Feem ntau cov emulsifiers uas tsis yog ionic tau los ntawm kev sib xyaw ntawm ethylene oxide nrog cov tshuaj uas muaj cov hydrogen nquag (xws li phenols, cawv, carboxylic acids, amines, thiab lwm yam). Lawv cov haujlwm tsis yog tsuas yog cuam tshuam nrog cov pab pawg hydrophobic alkyl xwb tab sis kuj tseem cuam tshuam rau qhov ntev ntawm cov saw polyoxyethylene. Lawv muaj kev ua haujlwm siab ntawm qhov chaw, kev ruaj khov, thiab muaj peev xwm emulsifying zoo, qhia txog kev sib raug zoo nrog lwm cov emulsifiers thiab lawv cov additives, thiab muaj qee yam chelating effect rau cov hlau ions. Lawv cov haujlwm tsis yog nyob ntawm tus nqi pH ntawm cov tshuaj, thiab cov emulsion tsim ntawm Phase Inversion Temperature (PIT) yog qhov ruaj khov tshaj plaws.
3.3.Lub hauv paus ntsiab lus ua haujlwm ntawm asphalt emulsifiers
Thaum qhov concentration ntawm cov emulsifier qis heev, muaj ob peb lub molecule emulsifier. Ntawm qhov sib tshuam ntawm huab cua thiab dej, nws tsis yooj yim sua kom muaj ntau lub molecule emulsifier sib sau ua ke. Ntawm qhov chaw, nws yuav luag tseem nyob hauv kev sib cuag ncaj qha nrog huab cua thiab dej, thiab qhov nro ntawm qhov chaw tseem yuav luag tsis hloov pauv, tseem nyob ze rau qhov nro ntawm qhov chaw ntawm dej ntshiab.
Thaum qhov concentration ntawm cov emulsifier nce ntxiv kom raug, cov emulsifier molecules sai sai sib sau ua ke rau ntawm qhov dej, txo qhov chaw sib cuag ntawm huab cua thiab dej, yog li ua rau qhov nro ntawm qhov chaw poob qis sai.
Thaum qhov concentration ntawm cov emulsifier nce ntxiv thiab mus txog qee qhov nqi, ntau cov emulsifier molecules sib sau ua ke rau ntawm qhov chaw ntawm cov kua dej, tsim ib daim zaj duab xis monomolecular uas npog qhov chaw ntawm cov kua, uas cais cov kua dej tawm ntawm huab cua thiab ua kom qhov nro ntawm qhov chaw ruaj khov. Yog tias qhov concentration ntawm cov emulsifier nce me ntsis ntxiv, cov emulsifier molecules tsis tuaj yeem sib sau ua ke rau ntawm qhov chaw dej, tab sis hloov chaw lawv tus kheej sib sau ua ke rau hauv micelles lossis micellar aggregates nrog cov pab pawg lipophilic taw rau sab hauv thiab cov pab pawg hydrophilic taw rau sab nraud. Qhov concentration tsawg kawg nkaus uas micelles lossis micellar aggregates yuav pib tsim feem ntau hu ua Critical Micelle Concentration (CMC).
Tom qab mus txog qhov tseem ceeb ntawm cov micelle concentration, yog tias qhov concentration ntawm cov emulsifier txuas ntxiv nce ntxiv, qhov kev nruj ntawm qhov chaw yuav tsis txo qis lawm. Vim tias ib zaj duab xis monomolecular twb tau tsim rau ntawm qhov chaw, cov emulsifier molecules feem ntau sib koom ua ke thiab txav mus ze dua, txuas ntxiv mus sib sau ua ke rau hauv micelles, yog li ua rau tus lej ntawm micelles hauv cov emulsion nce ntxiv tas li.
Kev emulsification ntawm asphalt yog ib qho tseem ceeb ntawm kev ua emulsifying. Tom qab ntxiv cov emulsifier rau hauv cov roj-dej tov, ob pawg ntawm cov emulsifier teeb tsa lawv tus kheej hauv ib txoj kev taw qhia, txuas ob qhov interfaces ntawm roj thiab dej, yog li tiv thaiv lawv los ntawm kev sib tsoo. Tom qab do thiab dispersed, asphalt tuaj yeem ruaj khov dispersed hauv dej hauv daim ntawv ntawm cov khoom me me.
Xaus lus
Piv txwv li, siv cov asphalt emulsifiers, tsab xov xwm no muab kev qhia txog thiab kev tshuaj xyuas txog cov yam ntxwv ntawm cov qauv, cov ntsiab cai ua haujlwm, thiab cov xwm txheej ntawm kev siv surfactants. Surfactants tuaj yeem txo qhov nro ntawm qhov dej, nqus cov surfactant molecules ntawm ntau qhov sib txuas, thiab feem ntau muaj qee qib ntawm kev nqus dej. Nws yog qhov kev nqus dej no uas ua rau surfactants muaj ntau yam haujlwm xws li emulsification, demulsification, foaming, dispersion, coagulation, thiab wetting. Asphalt emulsifiers ua haujlwm los ntawm kev siv cov nyhuv emulsifying ntawm surfactants. Txawm hais tias los ntawm qhov kev xav ntawm kev ua tau zoo lossis kev tiv thaiv ib puag ncig, kev tsim kho txias yog qhov tseem ceeb hauv kev txhim kho kev tsim kho txoj kev loj hauv xyoo pua 21st, thiab emulsifiers yog lub hauv paus ntawm cov thev naus laus zis no. Kev tshawb fawb thiab kev txhim kho ntawm kev ua tau zoo emulsifier yuav muaj kev cuam tshuam loj heev rau kev tsim kho txias.
Lub sijhawm tshaj tawm: Lub Peb Hlis-31-2026