Pfungwa huru
● Rheology yemabhinari sulfate-isina surfactant musanganiswa inoratidzwa mukuedza.
● Migumisiro yepH, kuumbwa uye ionic concentration inoongororwa zvakarongeka.
● CAPB: SMCT surfactant mass ratio ye1: 0.5 inovaka yakanyanya shear viscosity.
● Yakakosha kuisa munyu kunodiwa kuti uwane shear viscosity maximum.
● Micellar contour kureba yakatorwa kubva kuDWS inopindirana zvakasimba neshear viscosity.
Abstract
Mukutsvaga chizvarwa chinotevera sulfate-isina surfactant mapuratifomu, basa razvino rinopa imwe yekutanga kurongeka rheological kuferefeta kweaqueous Cocamidopropyl Betaine (CAPB) -Sodium Methyl Cocoyl Taurate (SMCT) musanganiswa mukuumbwa kwakasiyana, pH, uye ionic simba. CAPB-SMCT aqueous solutions (total active surfactant concentration ye8-12 wt. %) dzakagadzirirwa pane akati wandei surfactant uremu reshiyo, akagadziridzwa pHs 4.5 uye 5.5, uye titrated neNaCl. Yakatsiga uye oscillatory shear zviyero zvakaverengerwa macroscopic shear viscosity, nepo diffusing wave spectroscopy (DWS) microrheology yakapa frequency yakagadziriswa viscoelastic moduli uye hunhu micellar kureba zviyero. Pasi pemamiriro asina munyu, magadzirirwo acho airatidza Newtonian rheology ine maximal shear viscosities paCAPB:SMCT huremu reshiyo ye1:0.5, inoratidza kukwidziridzwa cationic-anionic headgroup bridging. Kudzikisa pH kubva pa5.5 kusvika 4.5 kunopa yakakura mambure chaji yakanaka paCAPB, nokudaro zvichisimudzira electrostatic kuomarara neanionic yakazara SMCT uye kugadzira akawanda akasimba micellar network. Yakarongeka munyu yekuwedzera modulated headgroup-headgroup repulsions, kutyaira morphological evolution kubva discrete micelles kusvika elonged, sehonye aggregates. Zero-shear viscosities yairatidza hukuru hwakasiyana pane yakakosha salt-to-surfactant ratios (R), ichiratidza chiyero chakaomesesa pakati pe electrostatic double-layer screening uye micellar elongation. DWS microrheology yakatsigira izvi macroscopic zvakacherechedzwa, ichiburitsa yakasarudzika Maxwellian spectra paR ≥ 1, inofambirana nereptation-inodzorwa nekutyora-recombination maitiro. Zvinonyanya kukosha, kupindira uye kutsungirira kureba kwakaramba kusingachinji nesimba reionic, nepo kureba kwecontour kwairatidza kuwirirana kwakasimba ne zero-shear viscosity. Izvi zvakawanikwa zvinosimbisa basa rakakosha remicellar elongation uye thermodynamic synergy mukudzora fluid viscoelasticity, ichipa chimiro cheinjiniya yepamusoro-inoshanda sulfate-isina surfactants kuburikidza nekutonga chaiko kwechaji density, kuumbwa, uye ionic mamiriro.
Graphical Abstrac
Nhanganyaya
Aqueous binary surfactant masisitimu anosanganisira akasiyana anochajiswa marudzi anoshandiswa zvakanyanya munzvimbo dzakawanda dzemaindasitiri, kusanganisira zvekuzora, zvemishonga, agrochemicals, uye maindasitiri ekugadzira chikafu. Kutorwa kwakapararira kweaya masisitimu kunonyanya kukonzerwa nehukuru hwavo hwepamusoro uye rheological mashandiro, ayo anogonesa kukwidziridzwa kwekuita mukuumbwa kwakasiyana. Iko synergistic self-assembly yeakadaro surfactants kuita sehonye, akapinzwa aggregates inopa inogoneka macroscopic zvivakwa, zvinosanganisira kuwedzera viscoelasticity uye kuderedzwa kwekubatana kwechiso. Kunyanya, musanganiswa weanionic uye zwitterionic surfactants anoratidza synergistic ekuwedzera muchiitiko chepamusoro, viscosity, uye interfacial tension modulation. Aya maitiro anomuka kubva pakusimbaradza kwemagetsi emagetsi uye steric kudyidzana pakati pemapoka emusoro wepolar uye hydrophobic miswe yeva surfactants, kusiyana neamwe-surfactant masisitimu, uko zvinosemesa magetsi emagetsi anowanzo kudzikamisa mashandiro ekuita.
Cocamidopropyl betaine (CAPB; SMILES: CCCCCCCCCC(=O)NCCCN+ (C)CC([O−])=O) inoshandiswa zvakanyanya amphoteric surfactant mukugadzira zvizorwa nekuda kwekunaka kwayo kwekuchenesa uye kugadzirisa bvudzi. Chimiro chezwitterionic cheCAPB chinogonesa kuwirirana kwe electrostatic neanionic surfactants, inosimudzira kugadzikana kwefuro uye inosimudzira kuita kwepamusoro kwekugadzira. Kwemakumi mashanu emakore apfuura, misanganiswa yeCAPB ine sulfate-based surfactants, seCAPB-sodium lauryl ether sulfate (SLES), yakava hwaro muzvigadzirwa zvekuchengeta munhu. Zvisinei, zvisinei nekushanda kwe sulfate-based surfactants, kunetseka maererano nekukwanisa kwavo kushatisa dermal uye kuvapo kwe 1,4-dioxane, iyo yakagadzirwa ne ethoxylation process, yakakonzera kufarira mune dzimwe nzira dzisina sulfate. Vanovimbisa vamiriri vanosanganisira amino-asidhi-based surfactants, senge mataurates, sarcosinates, uye glutamates, ayo anoratidza kukwidziridzwa biocompatibility uye milder zvivakwa [9]. Zvakadaro, mapoka makuru emusoro wepolar edzimwe nzira idzi anowanzo kutadzisa kuumbwa kwezvimiro zvemicellar zvakabatikana zvakanyanya, zvichiita kuti pashandiswe rheological modifiers.
Sodium methyl cocoyl taurate (SMCT; SMILES:
CCCCCCCCCCCC(=O)N(C)CCS(=O)(=O)O[Na]) is anionic surfactant yakagadzirwa semunyu wesodium kuburikidza neamide kubatanidza N-methyltaurine (2-methylaminoethanesulfonic acid) ine coconut-inotorwa fatty acid cheni. SMCT ine amide-yakabatana taurine headgroup padivi peboka rakasimba reanionic sulfonate, ichiita kuti ive biodegradable uye ienderane neganda pH, iyo inoiisa seanovimbisa mumiriri wekuumbwa kusina sulfate. Taurate surfactants inoratidzirwa neyakaomesesa detergency, yakaoma-mvura kusimba, hunyoro, uye yakafara pH kugadzikana.
Rheological paramita, kusanganisira shear viscosity, viscoelastic moduli, uye goho kushushikana, zvakakosha pakuona kugadzikana, magadzirirwo, uye kuita kwezvakagadzirwa-zvakagadzirwa. Semuyenzaniso, yakakwira shear viscosity inogona kunatsiridza kuchengetwa kwe substrate, nepo goho kushushikana kunodzora kuomerera kwekugadzirwa kweganda kana bvudzi mushure mekunyorera. Aya macroscopic rheological hunhu anogadziriswa nezvakawanda zvinhu, zvinosanganisira surfactant concentration, pH, tembiricha, uye kuvapo kwe-co-solvents kana additives. Oppositely charged surfactants anogona kuita akasiyana microstructural shanduko, kubva kuspherical micelles uye vesicles kune liquid crystalline phases, izvo, zvakare, zvinokanganisa zvakanyanya kuwanda rheology. Misanganiswa yeamphoteric uye anionic surfactants inowanzogadzira elongated wormlike micelles (WLMs), iyo inosimudzira zvakanyanya viscoelastic zvivakwa. Kunzwisisa iyo microstructure-pfuma hukama, saka, yakakosha pakugadzirisa kuita kwechigadzirwa.
Zvidzidzo zvakawanda zvekuyedza zvakaongorora analogous mabhinari masisitimu, akadai seCAPB-SLES, kujekesa iyo microstructural hwaro hwezvivakwa zvavo. Somuenzaniso, Mitrinova et al. [13] correlated micelle size (hydrodynamic radius) ine solution viscosity muCAPB-SLES-medium-chain co-surfactant misanganiswa inoshandisa rheometry uye dynamic light scattering (DLS). Mechanical rheometry inopa nzwisiso mukushanduka kwe microstructural yeiyi misanganiswa uye inogona kuwedzerwa ne optical microrheology ichishandisa diffusing wave spectroscopy (DWS) iyo inotambanudza inosvikika frequency domain, inobata mapfupi-nguva dynamics kunyanya ane chekuita neWLM kuzorora maitiro. MuDWS microrheology, iyo inorevesa square displacement yeakamisikidzwa colloidal probes inoteverwa nekufamba kwenguva, ichigonesa kutorwa kwemutsara viscoelastic moduli yepakati yakatenderedza kuburikidza neyakajairwa Stokes-Einstein hukama. Iyi nzira inoda mavhoriyamu mashoma ekuenzanisa uye saka inobatsira pakudzidza zvinwiwa zvakaoma kunzwisisa uye kuwanikwa kwezvinhu zvishoma, semuenzaniso maprotein-based formulations. Ongororo ye <Δr²(t)> data pane yakakura frequency spectra inofambisa fungidziro yemicellar paramita senge mesh size, entanglement kureba, kushingirira kureba, uye contour kureba. Amin et al vakaratidza kuti misanganiswa yeCAPB-SLES inopindirana nekufanotaura kubva kudzidziso yeCates, zvichiratidza kuwedzera kwakawedzera muviscosity pamwe nemunyu wekuwedzera kusvika munyu wakanyanya, kunze kweiyo viscosity inodonha zvakanyanya-mhinduro inowanzoitika muWLM system Xu neAmin vakashandisa mechanical rheometry uye DWS kuongorora SLES-CAPB musanganiswa weCCB-rheological mhinduro. yakapinzwa muWLM kuumbwa, iyo yakasimbiswa zvakare neiyo microstructural paramita yakatorwa kubva kuDWS zviyero. Kuvaka pamusoro pemaitiro aya, chidzidzo chazvino chinosanganisa mechaniki rheometry uye DWS microrheology kujekesa kuti kurongekazve kwemicrostructural kunofambisa sei hunhu hwekugera hweCAPB-SMCT musanganiswa.
Nekuda kwekuwedzera kuri kuda kwevanyoro uye vanoramba vachichenesa vamiririri, kuongororwa kwesulfate-isina anionic surfactants kwakawedzera simba kunyangwe matambudziko ekugadzira. Iwo akasiyana mamorekuru ekuvaka e sulfate-isina masisitimu anowanzo kuburitsa akasiyana rheological profiles, anoomesa akajairwa mazano ekusimudzira viscosity senge nemunyu kana polymeric thickening. Somuenzaniso, Yorke et al. yakaongorora dzimwe dzisiri-sulfate nekuongorora zvine hurongwa kupupa uye rheological maitiro ebhinari uye ternary surfactant musanganiswa ane alkyl olefin sulfonate (AOS), alkyl polyglucoside (APG), uye lauryl hydroxysultaine. A 1:1 reshiyo yeAOS-sultaine yakaratidza kugera-kutetepa uye furo maitiro akafanana neCAPB-SLES, zvichiratidza kuumbwa kweWLM. Rajput et al. [26] akaongorora imwe sulfate-isina anionic surfactant, sodium cocoyl glycinate (SCGLY), pamwe chete nenonionic co-surfactants (cocamide diethanolamine uye lauryl glucoside) kuburikidza neDLS, SANS, uye rheometry. Kunyangwe SCGLY yega yakagadzira micelles yakawanda yakatenderedzwa, co-surfactant yekuwedzera yakagonesa kuvakwa kweakanyanya kuomesesa micellar morphologies, inogoneka kune pH-inotyairwa modulation.
Zvisinei nekufambira mberi uku, kuferefeta kushoma kwakanangana neiyo rheological zvimiro zveakasimba sulfate-isina masisitimu anosanganisira CAPB nemataurate. Chidzidzo ichi chine chinangwa chekuzadza gaka iri nekupa imwe yekutanga yakarongeka rheological maitiro eCAPB-SMCT binary system. Nekurongeka kusiyanisa surfactant kuumbwa, pH, uye ionic simba, isu tinojekesa zvinhu zvinotonga shear viscosity uye viscoelasticity. Tichishandisa mechaniki rheometry uye DWS microrheology, tinoyera kurongeka kweiyo microstructural iri pasi pemaitiro ekugera eCAPB-SMCT musanganiswa. Izvi zvakawanikwa zvinojekesa kudyidzana pakati pepH, CAPB-SMCT ratio, uye ionic mazinga mukusimudzira kana kuvharidzira kuumbwa kweWLM, nekudaro ichipa ruzivo runoshanda mukugadzirisa rheological profiles yezvakagadziriswa surfactant-based zvigadzirwa zveakasiyana maindasitiri ekushandisa.
Nguva yekutumira: Aug-05-2025