E bonts'a matla a rheological a metsoako e se nang sulfate ea cocamidopropyl betaine-sodium methyl cocoyl taurate ho pholletsa le sebopeho, pH, le maemo a ionic.

Selelekela

Sistimi ea aqueous binary surfactant e kenyelletsang mefuta e fapaneng ea qoso e sebelisoa haholo makaleng a mangata a indasteri, ho kenyeletsoa litlolo, litlhare, lik'hemik'hale tsa temo le liindasteri tsa ho lokisa lijo. Kamohelo e atileng ea litsamaiso tsena haholo-holo e amahanngoa le ts'ebetso ea tsona e holimo ea sefahleho le ea rheological, e thusang ts'ebetso e ntlafalitsoeng mekhoeng e fapaneng. Ho ikamahanya ha li-surfactants tse joalo hore e be liboko, tse ferekaneng ho fana ka thepa ea macroscopic e ka rarolloang haholo, ho kenyeletsoa ho eketseha ha viscoelasticity le ho fokotseha ha tsitsipano lipakeng tsa sefahleho. Haholo-holo, motsoako oa li-anionic le zwitterionic surfactants li bonts'a lintlafatso tsa synergistic ts'ebetsong ea bokaholimo, viscosity, le ho feto-fetoha ha tsitsipano ea sefahleho. Boitšoaro bona bo hlaha ho tsoa ho litšebelisano tse matla tsa electrostatic le steric lipakeng tsa lihlopha tsa hlooho ea polar le mehatla ea hydrophobic ea li-surfactants, tse fapaneng le litsamaiso tse nang le surfactant e le 'ngoe, moo matla a repulsive electrostatic hangata a fokotsang ntlafatso ea ts'ebetso.

Cocamidopropyl betaine (CAPB; SMILES: CCCCCCCCCCCC(=O)NCCCN+ (C)CC([O−])=O) ke amphoteric surfactant e sebelisoang haholo litlolong tsa litlolo ka lebaka la ts'ebetso ea eona ea tlhoekiso e bobebe le thepa ea ho lokisa moriri. Sebopeho sa zwitterionic sa CAPB se thusa ho sebelisana le electrostatic synergy le li-anionic surfactants, ho matlafatsa botsitso ba foam le ho khothalletsa ts'ebetso e ntlafetseng ea tlhahiso. Lilemong tse mashome a mahlano tse fetileng, metsoako ea CAPB e nang le li-surfactants tse thehiloeng ho sulfate, joalo ka CAPB-sodium lauryl ether sulfate (SLES), e bile motheo oa lihlahisoa tsa tlhokomelo ea motho. Leha ho le joalo, ho sa tsotellehe katleho ea li-surfactants tse thehiloeng ho sulfate, matšoenyeho mabapi le bokhoni ba bona ba ho teneha ha letlalo le boteng ba 1,4-dioxane, e leng sehlahisoa sa ts'ebetso ea ethoxylation, e tsamaisitse thahasello mefuteng e meng e se nang sulfate. Bakhethoa ba ts'episang ba kenyelletsa li-surfactants tse thehiloeng ho amino-acid, joalo ka li-taurates, sarcosinates, le glutamates, tse bonts'ang tšebelisano e ntlafalitsoeng ea bophelo le thepa e bobebe [9]. Leha ho le joalo, lihlopha tse batlang li le ngata tsa lihloho tsa polar tsa mefuta e meng hangata li sitisa ho thehoa ha libopeho tse ferekaneng haholo tsa micellar, e leng se hlokang hore ho sebelisoe li-rheological modifiers.

Sodium methyl cocoyl taurate (SMCT; SMILES:
CCCCCCCCCCCC(=O)N(C)CCS(=O)(=O)O[Na]) ke sehlahisoa sa anionic se entsoeng joalo ka letsoai la sodium ka ho kopanngoa ha amide ea N-methyltaurine (2-methylaminoethanesulfonic acid) ka ketane ea coconut e nkiloeng ka mafura a mafura. SMCT e na le sehlopha sa lihlooho tsa taurine se amanang le amide hammoho le sehlopha se matla sa anionic sulfonate, se etsa hore e khone ho bola le ho tsamaisana le pH ea letlalo, e e behang e le mokhethoa ea tšepisang bakeng sa metsoako e se nang sulfate. Li-surfactants tsa Taurate li khetholloa ka matla a tsona a ho hloekisa, ho mamella metsi a thata, bonolo, le botsitso bo pharaletseng ba pH.

Litekanyetso tsa Rheological, ho kenyelletsa le shear viscosity, viscoelastic moduli, le khatello ea maikutlo, li bohlokoa haholo ho khethollang botsitso, sebopeho le ts'ebetso ea lihlahisoa tse thehiloeng ho surfactant. Mohlala, viscosity e phahameng ea shear e ka ntlafatsa ho bolokoa ha karoloana, athe khatello ea lihlahisoa e laola ho khomarela ha letlalo kapa moriri kamora kopo. Litšobotsi tsena tsa macroscopic rheological li hlophisoa ke lintlha tse ngata, ho kenyelletsa khatello ea surfactant, pH, mocheso, le boteng ba li-co-solvents kapa li-additives. Li-surfactants tse hanyetsanang li ka ba le liphetoho tse fapaneng tsa sebopeho sa microstructural, ho tloha ho li-micelles tse chitja le li-vesicles ho ea ho mekhahlelo ea kristale ea metsi, e leng eona e amang rheology e ngata. Metsoako ea li-amphoteric le anionic surfactants hangata li etsa li-micelles tse telele tse kang seboko (WLMs), tse ntlafatsang haholo litšoaneleho tsa viscoelastic. Ka hona, ho utloisisa likamano tsa microstructure-thepa ho bohlokoa bakeng sa ho ntlafatsa ts'ebetso ea sehlahisoa.

Liphuputso tse ngata tsa liteko li batlisisitse litsamaiso tsa binary tse tšoanang, joalo ka CAPB-SLES, ho hlakisa motheo oa sebopeho sa thepa ea bona. Ka mohlala, Mitrinova et al. [13] boholo bo hokahaneng ba micelle (hydrodynamic radius) e nang le viscosity ea tharollo ho CAPB-SLES-medium-chain-chain co-surfactant metsoako e sebelisang rheometry le dynamic light scattering (DLS). Mechanical rheometry e fana ka temohisiso mabapi le phetoho ea microstructural ea metsoako ena 'me e ka eketsoa ke optical microrheology e sebelisa diffusing wave spectroscopy (DWS) e atolosang sebaka se fumanehang sa maqhubu, ho hapa matla a nakoana a amanang haholo le mekhoa ea ho phomola ea WLM. Ho DWS microrheology, karolelano ea lisekoere tsa ho falla ha li-colloidal probes tse kentsoeng li lateloa ha nako e ntse e ea, e leng se nolofalletsang ho ntšoa ha moduli oa viscoelastic oa sebaka se potolohileng ka kamano e akaretsang ea Stokes-Einstein. Mokhoa ona o hloka li-samples tse fokolang feela, kahoo o molemo bakeng sa ho ithuta maro a rarahaneng a nang le lintho tse fokolang tse fumanehang, mohlala, li-protein-based formulations. Tshekatsheko ya <Δr²(t)> ya data ho phatlalla le spectra e pharalletseng e thusa ho hakanya maemo a mesh joalo ka boholo ba letlooeng, bolelele ba ho ts'oaroa, bolelele ba nako, le bolelele ba contour. Amin et al o bontšitse hore metsoako ea CAPB-SLES e lumellana le se boletsoeng esale pele ho tsoa khopolong ea Cates, e bonts'a keketseho e hlakileng ea viscosity ka ho eketsoa ha letsoai ho fihlela letsoai le le matla, ho feta moo viscosity e theohang hantle - karabelo e tloaelehileng lits'ebetsong tsa WLM Xu le Amin ba sebelisitse rheometry ea mochini le DWS ho hlahloba SLES-CAPB rheological reaction sebopeho se ts'oarellang sa WLM, se ileng sa tiisoa hape ke mekhahlelo e menyenyane ea sebopeho se entsoeng ho tsoa litekanyong tsa DWS. Ho aha holim'a mekhoa ena, boithuto ba hajoale bo kopanya rheometry ea mochini le microrheology ea DWS ho hlakisa hore na tlhophiso e menyane ea sebopeho se tsamaisang boitšoaro ba ho kuta ba metsoako ea CAPB-SMCT.

Ka lebaka la tlhokahalo e ntseng e eketseha ea lisebelisoa tsa tlhoekiso tse bonolo le tse tšoarellang haholoanyane, ho lekoa ha li-anionic surfactants tse se nang sulfate ho eketsehile ho sa tsotellehe liphephetso tsa tlhahiso. Meaho e ikhethileng ea limolek'hule tsa litsamaiso tse se nang sulfate hangata li fana ka li-profiles tse fapaneng tsa rheological, tse thatafatsang maano a tloaelehileng a ntlafatso ea viscosity joalo ka ka letsoai kapa polymeric thickening. Ka mohlala, Yorke et al. e ile ea hlahloba mekhoa e meng e sa sebeliseng sulfate ka ho batlisisa ka mokhoa o hlophisehileng hore na ho na le mafulo le rheological ea metsoako ea binary le ternary surfactant e nang le alkyl olefin sulfonate (AOS), alkyl polyglucoside (APG), le lauryl hydroxysultaine. Karo-karolelano ea 1:1 ea AOS–sultaine e bonts'itse litšobotsi tsa ho sesa ho kuta le ho foam tse tšoanang le CAPB-SLES, e bontšang sebopeho sa WLM. Rajput et al. [26] e hlahlobile sehlahisoa se seng sa anionic se se nang sulfate, sodium cocoyl glycinate (SCGLY), hammoho le li-nonionic co-surfactants (cocamide diethanolamine le lauryl glucoside) ka DLS, SANS, le rheometry. Leha SCGLY e le 'ngoe e thehile li-micelles tse chitja tse ngata, tlatsetso ea co-surfactant e thusitse ho aha li-micellar morphologies tse rarahaneng, tse khonang ho feto-fetoha ha maemo a pH.

Leha ho na le tsoelo-pele ena, ha ho bapisoa, lipatlisiso tse fokolang li lebisitse ho thepa ea rheological ea litsamaiso tse sa feleng tsa sulfate tse kenyelletsang CAPB le lireschorente. Boithuto bona bo ikemiselitse ho tlatsa sekheo sena ka ho fana ka e 'ngoe ea likarolo tsa pele tse hlophisitsoeng tsa rheological tsa sistimi ea binary ea CAPB-SMCT. Ka ho fapanyetsana ka mokhoa o hlophisitsoeng oa sebopeho sa surfactant, pH, le matla a ionic, re hlakisa lintlha tse laolang ho shear viscosity le viscoelasticity. Re sebelisa rheometry ea mochini le DWS microrheology, re lekanya tlhophiso e nyane ea sebopeho se thehiloeng boitšoarong ba ho kuta ba metsoako ea CAPB-SMCT. Liphuputso tsena li hlakisa tšebelisano lipakeng tsa pH, karo-karolelano ea CAPB-SMCT, le maemo a ionic ho khothaletseng kapa ho thibela sebopeho sa WLM, ka hona e fana ka leseli le sebetsang mabapi le ho lokisoa ha litaba tsa rheological tsa lihlahisoa tse tšoarellang tse thehiloeng ho surfactant bakeng sa lits'ebetso tse fapaneng tsa indasteri.