Tusmada viscosity ee hydroxypropyl methylcellulose waa tusmada aad muhiim u ah. viscosity-gu ma matalo daahirnimada. viscosity-ga cellulose HPMC wuxuu ku xiran yahay habka wax soo saarka. Deegaannada kala duwan ee isticmaalka waa inay doortaan cellulose HPMC oo leh viscosities kala duwan, ee maaha viscosity-ga cellulose HPMC oo sarreeya, ayaa ka sii fiican! Waxa saxda ah ayaa sax ah!
1. Xakamaynta fiiqnaanta
Hydroxypropyl methylcellulose oo ah nuugid sare ma soo saari karto cellulose aad u sareysa oo keliya iyadoo la isticmaalayo faakiyuum iyo beddelka nitrogen-ka marka wax soo saarka la sameynayo. Guud ahaan, soo saarista cellulose-ka nuugid sare leh ee Shiinaha lama xakamayn karo. Si kastaba ha ahaatee, haddii mitirka oksijiinta raad lagu rakibi karo digsiga, soo saarista nuugiddeeda waxaa si macmal ah loo xakameyn karaa.
2. Adeegsiga wakiilka ururka
Intaa waxaa dheer, marka la eego xawaaraha beddelka ee nitrogen, way fududahay in la soo saaro alaabada nuugista sare leh iyadoon loo eegin sida nidaamku u qabo hawo-celin. Dabcan, heerka polymerization-ka ee suufka la safeeyey sidoo kale waa muhiim. Haddii taasi shaqayn weydo, markaa ku samee xiriirka hydrophobic. Waxaa jira wakiillo urureed oo ku sugan aaggan Shiinaha. Nooca wakiilka ururka ee la dooranayo wuxuu saameyn weyn ku leeyahay waxqabadka badeecada ugu dambeysa.
3. Waxyaabaha ku jira Hydroxypropyl
Ogsajiinta ku jirta fal-galka waxay sababtaa burburka cellulose iyo hoos u dhaca miisaanka molecular-ka, laakiin oksijiinta hartay waa xaddidan tahay, ilaa inta molecules-ka jabay dib loo xidho, ma aha wax adag in la sameeyo viscosity sare. Si kastaba ha ahaatee, heerka dhereggu wuxuu wax badan ka leeyahay waxa ku jira hydroxypropyl. Warshadaha qaar ayaa kaliya doonaya inay yareeyaan kharashka iyo qiimaha, laakiin ma rabaan inay kordhiyaan waxa ku jira hydroxypropyl, sidaa darteed tayadu ma gaari karto heerka wax soo saarka shisheeye ee la midka ah.
4. Arrimaha kale
Heerka haysashada biyaha ee badeecaddu wuxuu xiriir weyn la leeyahay hydroxypropyl, laakiin habka falcelinta oo dhan, waxay sidoo kale go'aamisaa heerka haysashada biyaha, saameynta alkaliyeynta, saamiga methyl chloride iyo propylene oxide, uruurinta alkali iyo haysashada biyaha. Saamiga suufka la safeeyey wuxuu go'aamiyaa waxqabadka badeecada.
Waqtiga boostada: Abriil-04-2023