▲I-Hydroxypropyl methyl cellulose (HPMC)yipowder emhlophe engenavumba, engenancasa, engenatyhefu. Emva kokunyibilika ngokupheleleyo emanzini, i-hydroxypropyl methyl cellulose iya kwenza i-colloid ecacileyo nethambileyo.
▲ Izinto eziphambili ezisetyenziswa kwi-hydroxypropyl methyl cellulose (HPMC): umqhaphu ocoliweyo, i-methyl chloride, i-propylene oxide, kunye nezinye izinto ezisetyenziswa kwi-raw, i-caustic soda, i-asidi, i-toluene, i-isopropanol, njl.njl.
Ukuthelekiswa kweenzuzo kunye nokungalungi kwe-hydroxypropyl methyl cellulose:
1. I-HPMC ecocekileyo ye-hydroxypropyl methyl cellulose ayibonakali kakuhle kwaye inobunzima obuncinci, enesikali se-0.3–0.4/ml.
I-HPMC exutyiweyo inobumanzi obuhle kakhulu kwaye ivakala inzima, nto leyo eyahlukileyo kakhulu kwimveliso yokwenyani ngembonakalo.
2. Isisombululo samanzi se-hydroxypropyl methyl cellulose se-HPMC esicocekileyo sicacile, sidlulisa ukukhanya okuphezulu, izinga lokugcina amanzi > 97%.
Isisombululo samanzi se-HPMC esixutyiweyo singcolile, kwaye izinga lokugcina amanzi kunzima ukufikelela kwi-80%.
3. I-HPMC ecocekileyo ayifanele ivumba i-ammonia, istatshi kunye nee-alcohols.
I-HPMC exutyiweyo idla ngokunuka zonke iintlobo zeencasa, nokuba ayinancasa, iya kuziva inzima.
4. Umgubo we-HPMC ococekileyo we-hydroxypropyl methyl cellulose une-fibrous phantsi kwe-microscope okanye iglasi yokukhulisa.
I-HPMC exutyiweyo inokubonwa njengezinto eziqinileyo okanye iikristale phantsi kwe-microscope okanye iglasi yokukhulisa.
Ziziphi iinkalo zokuchonga iingenelo kunye nokungalungi kwe-hydroxypropyl methyl cellulose?
1. isidanga esimhlophe
Nangona ubumhlophe bungenakukwazi ukumisela ukuba kulula na ukusebenzisa i-HPMC, kwaye ukuba kongezwa izinto zokwenza mhlophe ngexesha lenkqubo yemveliso, kuya kuchaphazela umgangatho wayo. Nangona kunjalo, uninzi lweemveliso ezilungileyo zimhlophe kakuhle.
2. Ubuhle
Ubukhulu be-HPMC bune-mesh engama-80 kunye ne-100 mesh, kwaye okukhona ubuncinci, ngokubanzi, kokukhona kungcono.
3. Ukudluliselwa
Bekai-hydroxypropyl methyl cellulose (HPMC)emanzini ukuze kwenziwe i-colloid ecacileyo, kwaye ujonge ukuhanjiswa kwayo kokukhanya. Okukhona ukuhanjiswa kokukhanya kuphezulu, kokukhona kungcono, nto leyo ebonisa ukuba akukho zinto zinganyibilikiyo kakhulu kuwo. Ukungena kwee-reactors ezithe nkqo ngokubanzi kulungile, ngelixa ee-reactors ezithe tye zimbi kakhulu.
4. Umlinganiselo
Okukhona ubukhulu bomxhuzulane othile bukhula, kokukhona ubunzima bungcono. Ubungakanani bubukhulu, ngokubanzi kuba umxholo weqela le-hydroxypropyl kuyo uphezulu, kwaye umxholo weqela le-hydroxypropyl uphezulu, ukugcinwa kwamanzi kungcono.
Ixesha leposi: Epreli-25-2024