1. Kakaretso ea Bothata
Hydroxyethyl cellulose (HEC)ke "thickener" le "rheology modifier" e sebelisoang haholo penteng ea latex, e ka ntlafatsang viscosity, boemo le botsitso ba polokelo ea pente. Leha ho le joalo, lits'ebetsong tse sebetsang, ka linako tse ling HEC e potlakisa ho etsa likristale, tse amang ponahalo, ts'ebetso ea kaho esita le botsitso ba polokelo ea pente.
2. Tlhahlobo ea lisosa tsa ho thehoa ha kristale
Ho qhibiliha ho sa lekaneng: Ho qhibiliha ha HEC metsing ho hloka maemo a itseng a susumetsang le nako. Ho qhibiliha ho sa lekaneng ho ka lebisa ho oversaturation ea sebakeng seo, kahoo ho theha pula ea kristale.
Bothata ba boleng ba metsi: Ho sebelisa metsi a thata kapa metsi a nang le litšila tse ngata ho tla etsa hore HEC e sebetsane le li-ion tsa tšepe (joalo ka Ca²⁺, Mg²⁺) ho etsa pula e sa qhibiliheng.
Foromo e sa tsitsang: Li-additives tse ling ka foromo (tse kang li-preservative, dispersants) li ka 'na tsa itšoara ka tsela e sa lumellaneng le HEC, ea etsa hore e theohe le ho etsa likristale.
Maemo a sa nepahalang a polokelo: Mocheso o feteletseng kapa polokelo ea nako e telele e ka etsa hore HEC e boele e khanye kapa e fokotsehe, haholo-holo mocheso o phahameng le maemo a mongobo o phahameng.
Phetoho ea boleng ba pH: HEC e na le kutloelo-bohloko ho pH, 'me tikoloho e nang le asiti e feteletseng kapa ea alkaline e ka senya botsitso ba eona mme ea baka pula ea kristale.
3. Litharollo
Ho arabela mathata a ka holimo, mehato e latelang e ka nkoa ho qoba kapa ho fokotsa ts'ebetso ea HEC e hlahisang likristale ka pente ea latex:
Ntlafatsa mokhoa oa ho qhala oa HEC
Sebelisa mokhoa oa pele ho ho hasana: pele u fafatse HEC butle-butle ka metsing tlas'a ho sisinyeha ka lebelo le tlaase ho qoba ho kopana ho bakoang ke ho kenya letsoho ka ho toba; ebe e ema metsotso e fetang 30 ho e kolobisa ka ho feletseng, ’me qetellong e e tsose ka lebelo le phahameng ho fihlela e qhibiliha ka ho feletseng.
Sebelisa mokhoa oa ho qhibiliha ha metsi a chesang: ho qhaqha HEC metsing a futhumetseng ho 50-60 ℃ ho ka potlakisa ts'ebetso ea ho qhibiliha, empa ho qoba mocheso o feteletseng (ho feta 80 ℃), ho seng joalo ho ka baka ho senyeha ha HEC.
Sebelisa li-co-solvents tse loketseng, tse kang ethylene glycol e nyenyane, propylene glycol, joalo-joalo, ho khothalletsa ho qhibiliha ha junifomo ea HEC le ho fokotsa kristale e bakoang ke ho tsepamisa mohopolo ho feteletseng sebakeng seo.
Ntlafatsa boleng ba metsi
Sebelisa metsi a sa hloekang kapa metsi a nolofalitsoeng ho e-na le metsi a tloaelehileng a pompo ho fokotsa tšitiso ea li-ion tsa tšepe.
Ho eketsa palo e loketseng ea chelating agent (e kang EDTA) ho foromo ea pente ea latex ho ka tsitsisa tharollo ka katleho le ho thibela HEC ho sebetsana le li-ion tsa tšepe.
Ntlafatsa moralo oa foromo
Qoba li-additives tse sa lumellaneng le HEC, tse kang li-preservative tse nang le letsoai le phahameng kapa li-disperpers tse itseng. Ho kgothaletswa ho etsa tlhahlobo ea ho lumellana pele o sebelisoa.
Laola boleng ba pH ba pente ea latex pakeng tsa 7.5-9.0 ho thibela HEC ho na ka lebaka la liphetoho tse matla tsa pH.
Laola maemo a polokelo
Tikoloho ea polokelo ea pente ea latex e lokela ho boloka mocheso o itekanetseng (5-35 ℃) le ho qoba maemo a nako e telele a phahameng kapa a tlase a mocheso.
E boloke e tiisitsoe ho thibela ho tsoa mouoane kapa ho silafala ha mongobo, qoba ho eketseha ha sebaka sa HEC mahloriso ka lebaka la ho qhibiliha ha solvent, le ho khothalletsa crystallization.
Khetha mefuta e nepahetseng ea HEC
Mefuta e sa tšoaneng ea HEC e na le phapang pakeng tsa solubility, viscosity, joalo-joalo Ho kgothaletswa ho khetha HEC e nang le tekanyo e phahameng ea ho fetola le ho fokotsa viscosity ho fokotsa tšekamelo ea eona ea ho kristale ka likhahla tse phahameng.
Ka ho ntlafatsa mokhoa oa ho qhala oaHEC, ho ntlafatsa boleng ba metsi, ho lokisa mokhoa, ho laola tikoloho ea polokelo le ho khetha mefuta e fapaneng ea HEC e loketseng, ho thehoa ha likristale ka pente ea latex ho ka qojoa kapa ho fokotseha ka katleho, kahoo ho ntlafatsa ts'ebetso ea botsitso le kaho ea pente ea latex. Ts'ebetsong ea 'nete ea tlhahiso, litokiso tse lebisitsoeng li lokela ho etsoa ho latela maemo a ikhethileng ho netefatsa boleng ba sehlahisoa le boiphihlelo ba basebelisi.
Nako ea poso: Mar-26-2025