Lapho kukhula i-viscoxyprotity methyl cellulose, ngcono ukugcinwa kwamanzi. I-Viscosity iyipharamitha ebalulekile yokusebenza kwe-HPMC. Njengamanje, abakhiqizi be-HPMC abahlukene basebenzisa izindlela ezahlukahlukene nezinsimbi ukukala ukubonakala kwe-HPMC. Izindlela eziphambili zifaka iHaakerotovisko, i-HIPPLER, UBBELOHDE neBrookfield.
Ngomkhiqizo ofanayo, imiphumela ye-viscosity elinganiselwe izindlela ezahlukahlukene iyahlukahluka kakhulu, futhi eminye yande. Ngakho-ke, lapho uqhathanisa i-viscosity, kufanele yenziwe phakathi kwendlela efanayo yokuhlola, kufaka phakathi izinga lokushisa, i-rotor, njll.
Ngobukhulu bezinhlayiyana, abahle kakhulu, okungcono ukugcinwa kwamanzi. Ngemuva kwezinhlayiya ezinkulu ze-cellulose ether thintana namanzi, ingaphezulu lincibilika ngokushesha futhi lakha ijeli lokusonga lokho kuvimbela ama-molecule wamanzi ukuthi aqhubeke nokungena ngaphakathi. Kwesinye isikhathi, ngisho nesikhathi eside evusa amadlingozi angeke ahlakazeke ngokulinganayo futhi ancibilike, akha isixazululo esinamafu ane-flocculent noma ukuqina. Ukugcinwa kwamanzi kwe-cellulose ether kuyathinteka kakhulu, futhi i-solubity ingesinye sezici zokukhetha i-cellulose ether.
I-Fechness nayo iyinkomba yokusebenza ebalulekile ye-methyl celtulose ether. I-MC ye-DRY DATERAR idinga i-powder, okuqukethwe kwamanzi okuphansi, nobuciko futhi kudinga ama-20% -60% usayizi wezinhlayiyana okungaphansi kwe-63um. Ubuhle buthinta i-solubility ye-hydroxypropylylylylylylylylylylylylylykyl methyl celtulose ether. I-COARSER MC imvamisa i-granular futhi ilulazeke kalula emanzini ngaphandle kokuqunjelwa, kepha izinga lokuchithwa lihamba kancane futhi alilungele ukusetshenziswa ku-Dester Powder Botport.
Ku-fortar elomile, i-MC ihlakazeka phakathi kokuhlanganiswa, i-filler enhle, usimende nezinye izinto zokwehla, futhi kuphela i-powder eyanele engakugwema ukubonakala kwe-methyl cellulose ether agglomore lapho kungezwa amanzi. Lapho i-MC ichithwa emanzini, kunzima ukuncibilikisa ekusakazweni. I-MC ene-Cooseber Depness ayigcini nje ngokuchitheka, kepha futhi inciphisa amandla endawo kadaka. Lapho kwakhiwa udaka olomile endaweni enkulu, kukhonjiswa ukuthi ijubane lokuphaka kodaka elomile lwasendaweni lincishiswa kakhulu, futhi ukuqhekeka kubangelwa isikhathi esihlukile sokuvuka. Okolweni lokudubula ngokwakha imishini ngokwakha imishini, ngoba isikhathi sokuxuba sifushane, izidingo zobuciko ziphakeme.
Ngokuvamile ukukhuluma, ukukhuphuka okuphezulu, kungcono ukugcinwa kwamanzi. Kodwa-ke, ukukhuphuka kwesisindo esiphakeme, isisindo se-molecular se-MC, futhi ukuqina kwe-MC kuzokwehla ngokufanele, okunomthelela ongemuhle ekusebenzeni nasekusebenzeni koMunga. Lapho kuphakama i-viscosity, kusobala ukuthi kube khona umphumela wokuqina wodaka, kepha awunakulingana nobudlelwano. Lapho kuphakama i-viscosity, kugcwele udaka olumanzi, phakathi nokwakhiwa, ukusebenza kwe-scraper enamathela nokunamathela okuphezulu kuya engxenyeni engezansi. Kepha akusizi ukwandisa amandla wesakhiwo sodumo olumanzi uqobo. Lapho ukwakhiwa, ukusebenza kwe-anti - i-droop akubonakali. Ngokuphambene nalokho, ezinye izithako ze-methyl cellulose eziguquliwe ezinokuqonda okuphakathi nendawo okuphansi zinokusebenza okuhle kakhulu ekuthuthukiseni amandla wesakhiwo sodaka lwamanzi.
Lapho imali enkulu ye-cellulose ether eyengezwe ku-datara, ngcono ukusebenza kokugcinwa kwamanzi, okuphezulu kwe-viscosity, kungcono ukusebenza kokugcinwa kwamanzi.
Ubuciko be-HPMC bunomthelela othile ekugcinweni kwalo kwamanzi, ngokuvamile bakhuluma, ngokusobala okufanayo nobunzima be-methyl cellulose ether, ngenani elilinganayo lecala, elibucayi bokuqala kabusha kwamanzi lingcono.
Ukugcinwa kwamanzi kwe-HPMC kuhlobene nokushisa okusetshenzisiwe, futhi ukugcinwa kwamanzi kwe-methyl cellulose ether kuyancipha ngokuvuka kwamazinga okushisa. Kepha ohlelweni lwangempela lwezinto ezibonakalayo, izindawo eziningi ezomile zodaka zivame ukuba semazingeni aphezulu (aphezulu kuneziqu ezingama-40) ngaphansi kwesimo sokwakha ilanga ehlobo, okuvame ukusheshisa ukwelashwa ngosimende kanye nodaka olomile.
Ukwehla kwamanani okugcina amanzi kuholela emveni osobala wokuthi ukukhiqizwa nokuphikiswa kokuqhekeka kuyathinteka. Ngaphansi kwalezo zimo, kubaluleke kakhulu ukunciphisa ithonya lezinto zokushisa. Yize i-methylydroxyeylyeylyelyelyeylyelyethylyltel ether additive ibhekwa njengendlela ephambili yentuthuko yezobuchwepheshe, ukuncika kwayo kumazinga okushisa kuzoholela ekunciphiseni ukusebenza kodaka owomile.
Ukwandisa umthamo we-methyl hydroxyethyl cellulose, ukumelana nokwakha nokuqhekeka namanje akunakuhlangabezana nezidingo zokusebenzisa. I-MC ngokusebenzisa ukwelashwa okukhethekile, njengokuthuthukisa izinga lokuthethelwa, kungenza ukumiswa kwayo kwamanzi okushisa ukuze kugcinwe umphumela ongcono, ukuze kunikeze ukusebenza okungcono ngaphansi kwezimo ezinzima.
Isikhathi sePosi: Feb-20-2025