▲IHydroxypropyl methyl cellulose (HPMC)ngumgubo omhlophe ongenavumba, ongenancasa, ongenatyhefu. Emva kokunyibilika ngokupheleleyo emanzini, i-hydroxypropyl methyl cellulose iya kwenza i-viscous colloid ebonakalayo.
▲ Izinto eziphambili ze-hydroxypropyl methyl cellulose (HPMC): i-cotton ecocekileyo, i-methyl chloride, i-propylene oxide, kunye nezinye izinto eziluhlaza, i-caustic soda, i-asidi, i-toluene, i-isopropanol, njl.
Ukuthelekiswa kweenzuzo kunye nokungalunganga kwe-hydroxypropyl methyl cellulose:
I-1.I-hydroxypropyl methyl cellulose ecocekileyo i-HPMC ikhululekile ngokubonakalayo kwaye inobuninzi obuncinci, kunye nesikali se-0.3-0.4 / ml.
I-HPMC egqwethiweyo ine-fluidity enhle kakhulu kwaye ivakalelwa kakhulu, eyahluke kakhulu kwimveliso yokwenene ngenkangeleko.
I-2.I-hydroxypropyl methyl cellulose ecocekileyo Isisombululo samanzi se-HPMC sicacile, ukuhanjiswa kokukhanya okuphezulu, izinga lokugcinwa kwamanzi> 97%.
Isisombululo samanzi se-HPMC esixutyiweyo simdaka noko, kwaye izinga lokugcinwa kwamanzi kunzima ukufikelela kwi-80%.
3.Pure HPMC kufuneka ivumba ammonia, istatshi kunye alcohols.
I-HPMC ethotyiweyo inokujoja zonke iintlobo zencasa, nokuba ayinancasa, iya kuziva inzima.
I-4.I-hydroxypropyl methyl cellulose ecocekileyo ye-HPMC powder i-fibrous phantsi kwe-microscope okanye iglasi yokukhulisa.
I-HPMC egqwethiweyo inokubonwa njengezinto eziqinileyo zegranular okanye iikristale phantsi kwemakroskopu okanye iglasi yokukhulisa.
Ukusuka kweyiphi imiba yokuchonga izibonelelo kunye nokungalunganga kwe-hydroxypropyl methyl cellulose?
1.idigri emhlophe
Nangona ubumhlophe bungenako ukugqiba ukuba i-HPMC kulula ukuyisebenzisa, kwaye ukuba ii-arhente ezimhlophe zongezwa ngexesha lenkqubo yemveliso, iya kuchaphazela umgangatho wayo. Nangona kunjalo, uninzi lweemveliso ezilungileyo zinobumhlophe obuhle.
2.Ukulunga
Ubulunga be-HPMC buba ne-80 mesh kunye ne-100 mesh, kwaye okona kucolekayo, xa sithetha ngokubanzi, kungcono.
3.Ugqithiso
Bekaihydroxypropyl methyl cellulose (HPMC)emanzini ukwenza i-colloid ebonakalayo, kwaye ujonge ukukhanya kwayo. Ukuphakama kokuhanjiswa kokukhanya, kungcono, kubonisa ukuba kukho izinto ezincinci ezinganyibilikiyo kuyo. Ukungeneka kwereactors ezithe nkqo kulungile gabalala, ngeli lixa ezo reactor ezithe tyaba zimbi kakhulu.
4.Umlinganiselo
Okukhona mkhulu umxhuzulane othile, kokukhona unzima ngakumbi. Ubuncinci bukhulu, ngokuqhelekileyo ngenxa yokuba umxholo weqela le-hydroxypropyl kuwo uphezulu, kwaye umxholo weqela le-hydroxypropyl liphezulu, ukugcinwa kwamanzi kungcono.
Ixesha lokuposa: Apr-25-2024