Ekusebenziseni i-hydroxypropyllylylym methyl celluloseI-HPMC, Ngokuvamile sithola ukuthi kuhlukaniswe ngezinhlobo ezimbili: Ukuchithwa okusheshayo nokuhamba kancane. Masiqonde umehluko phakathi kokuchithwa okusheshayo nokuchithwa kancane kwe-hydroxypropylylylylylylylylylylylk methyl.
Instant HPMC refers to the use of cross-linking agent for surface treatment in the production process, so that HPMC can be quickly dispersed in cold water, but not a real solution, through uniform stirring, viscosity slowly rise, that is, dissolution;
I-Slow Soluble HPMC nayo ingabizwa ngokuthi yimikhiqizo eshisayo yokuncibilika. Lapho kuhlangana namanzi abandayo, kungahlakazwa ngokushesha emanzini ashisayo. Ngokuvuselela ngokulinganayo, izinga lokushisa lesisombululo lizokwehlela emazingeni okushisa athile. (Izinga lokushisa lejeli lethu licishe libe ngu-60 ° C), i-viscosity izovela kancane kuze kusungulwe ijeli elisobala nelinamathelayo.
Nakhu umehluko phakathi kwesixazululo esisheshayo nesixazululo esisheshayo. Uma unemibuzo ngalolo lwazi, ungasithinta futhi thina.
I-Hydroxypropyllylylylylylylylyllllule
Ukungeza i-Hydroxypropylylylylylylylylylylyllul ku-Cement kwehlisa i-hydration yayo. Ngakho-ke yini oyaziyo ngokuthi isebenza kanjani? Ake sibheke i-hydroxypropylylylylylylyllsle Isimiso.
1. I-Ion Movement Disorder hypothesis
Siveze ukuthi i-hydroxyproppropyllllllllllllllvas ikhuphule ukubonwa kwezixazululo ze-pore, vimbela izinga lokunyakaza kwe-ionic, futhi libambezele i-hydration kasimende. Kodwa-ke, i-viscelise esezingeni eliphansi le-asherle Ngakho-ke, lokhu kucatshangwa akuvumelekile. Pupchez et al. futhi ungabaze le hypothesis. Eqinisweni, isikhathi sokufuduka noma ukufuduka noma ukufuduka kumafuphise, ngokusobala akukubi ngokubambezeleka kokubambezeleka kwe-hydration.
2. Ukuwohloka kwe-alkaline
Ama-Polysaccharides anciphisa kalula ngaphansi kwezimo ze-alkaline ukukhiqiza ama-hydroxyl carboxylic acids abambezele ama-hydration. Ngakho-ke, i-hydration ebambezelekile ye-hydroxypropylylylylylylylylylylyl methyl cellulose ingahle ibe ngenxa yokonakala kwayo kuma-alkaline usimende slurries ukwakha ama-hydroxycarboxbylic acid. Kodwa-ke, uPrapchez et al. Kutholakale ukuthi iziphothuli ze-cellulose zazizinze ngaphansi kwezimo ze-alkali, ezicekelwa phansi kancane kuphela, futhi imikhiqizo yokucekelwa phansi yayinomphumela omncane ekubambezelweni kokubambezeleka kwe-hydration.
I-3, i-adsorption
I-adsorption ingaba yi-hydroxypropyllylyllopyllyllop methyllulose block celmer cydration isizathu sangempela ukuthi izithasiselo eziningi ze-organic zizoba ama-addifies of cents kanye nemikhiqizo ye-hydration, ukuze zibambezele i-hydration kanye nokuvuselela i-hydration kanye nokuvutha kwe-hydration kanye nokuvutha kwe-hydration kanye nokuvutha kwe-cydration kanye nokuvutha kwe-hydration kanye nokuvuselelwa kuka usimende. Pupchez et al. Kutholakale ukuthi izitha ze-cellulose zi-adsorbed ezisezingeni lemikhiqizo ye-hydration efana ne-calcium hydroxide, kepha hhayi i-calcium alimunate hydrate, kepha hhayi i-calcimium alimunate hydrate, kepha hhayi i-adsorbed by thringite kanye nezigaba ezingenamkhawulo. Ngaphezu kwalokho, endabeni ye-cellulose ether, umthamo we-adsorption we-HEC unamandla kunalokho okuvuvukala mc. Ukwehlisa okuqukethwe kwe-hydroxyethyl ku-hec noma i-hydroxypropyl ku-HPMC, amandla aqine ama-advorption: njengemikhiqizo ye-hydration, umthamo we-adddtion, umthamo we-adsorption we-calcium hydroxide unamandla kunaleyo ye-CSH. Ukuhlaziywa okwengeziwe kukhombisa nokuthi umthamo we-advocate wemikhiqizo ye-hydration kanye ne-cellulose ether kuhlobene nokubambezeleka kwe-hydration yesimende: I-adsorption, ukumbeka okusobala ngokwengeziwe, kepha kusobala ukuthi ukubambezeleka kwe-pollulose ether kubuthakathaka. I-Cellulose Ether of Triccacium Silication futhi imikhiqizo yayo ye-hydration ine-adsorption eqinile, kusobala ukuthi kubambezele inqubo ye-hytringite ephansi kakhulu, kepha ukwakheka okubambezelekile kusobala, ngenxa yokwakheka okubambezelekile kusobala, ngenxa yokwakheka okubambezelekile kusobala, ngenxa yokwakheka okubambezelekile kuphazamiseka, kungukunwetshwa kwe-cellulose ether. I-hydration sekwephuzile yaqhubeka.
Lezi yi-hydroxypropyllylylyll methyl cellulose ukubambezela umgomo wokuzimela. Siyethemba ukuthi lolu lwazi luzokwenza wonke umuntu aqonde ukuthi umkhiqizo usebenza kanjani futhi ulisebenzise kangcono.
Isikhathi sePosi: Jun-18-2022