I-HPMC yezakhiwo zokugcina amanzi zodaka ngodaka

I-HPMC (HYDROXYPROPYL Methylcellulose), njengesengezo esibalulekile samakhemikhali, isetshenziswa kabanzi ngodaka oluhlanganisiwe. Umsebenzi wayo oyinhloko ukuthuthukisa ukusebenza kokugcinwa kwamanzi kodaka. Ukusebenza kokugcinwa kwamanzi kunomthelela obalulekile ekusebenzeni kodaka kanye nomphumela wokwakha wokugcina. Ukusetshenziswa kwe-HPMC kudaka oluhlanganisiwe oluhlanganisiwe kungathuthukisa ngempumelelo ukukheka kwalo, amandla abusayo, ukuqina, njll., Ngaleyo ndlela ukwenza ngcono ikhwalithi yokwakha kanye nokwakha ukusebenza kwezokwakha.

1. Izakhiwo eziyisisekelo kanye nemigomo esebenzayo ye-HPMC
I-HPMC iyi-ether engeyona eye-moulsose engekho nge-solubity yamanzi amahle. Kwakha isixazululo se-colloidal ngemuva kokuncibilika emanzini, okungakhulisa kakhulu umthamo wokugcina amanzi odaka. Impahla yayo yokugcinwa kwamanzi ivela ekwakheni ama-molekral athola i-HPMC. I-Hydroxypropyl kanye ne-methyl substiturents banikeze i-hydrophicility, ukuvumela ukuthi kwakhiwe into enamathelayo phambi kwama-molecule amanzi, ngaleyo ndlela anciphise ukulahleka kwamanzi. Ngasikhathi sinye, ama-molekyuli we-HPMC akha ukwakheka kwenethiwekhi nge-hydrogen bonding, edlala indima ekulungiseni umswakama osimende. Lesi sakhiwo sekhemikhali esiyingqayizivele senza kube ngumenzeli ofanele wokugcina amanzi odongeni oxutshwe.

2. Umphumela we-HPMC ekusebenzeni kokugcinwa kwamanzi kodaka oluhlanganisiwe olomile
(1) Thuthukisa ukusebenziseka kodaka
Ukutholwa kokugcinwa kwamanzi kwe-HPMC kunganweba ngempumelelo isikhathi samanzi esihanjiswa ngodaka, okwenza udaka mancane amathuba okuthi alahlekelwe ngamanzi ezindaweni ezishisayo noma ezomile, ngaleyo ndlela egcina ukusebenza okuhle kokwakhiwa. Lokhu kuphatha amanzi kubaluleke kakhulu ekwakhiweni kwangaphandle, kusiza ekuqinisekiseni ubukhulu beplastiki yodaka ngesikhathi sokubeka noma ukubeka, okwenza kube lula ukusebenzisa kanye nezinga. Ngasikhathi sinye, ukugcinwa kwamanzi okuhle kunciphisa ubungozi be-shrinkage kanye nokuqhekeka okubangelwa ukulahleka kwamanzi futhi kuthuthukise ukuqina kanye nokufana kokwakha.

(2) Thuthukisa amandla okubopha
Umswakama wezinto zokwenziwa kosimende ubalulekile ekuphenduleni kwesimende hydration reaction. I-HPMC iqinisekisa i-hydration eyanele yensimbi ngomphumela wayo wokugcina amanzi, ngaleyo ndlela ithuthukise amandla okubopha phakathi kosimende kanye ne-substrate. Lapho amanzi odonswayo elahlekile ngokushesha okukhulu, usimende awukwazi ukuqeda ukusabela kwe-hydration, okuholela ekunciphiseni amandla okubopha. Ukungezwa kwe-HPMC ngempumelelo kugcina isimo esimanzi ku-dungara futhi kuqinisekisa ukusabela kwe-hydration, ngaleyo ndlela kuthuthukise ukusebenza kwe-bonding.

(3) thuthukisa ukumelana nokuqhekeka nokuqina kodaka
Ukulahleka kwamanzi okusheshayo kuvame ukudala ukuqhekeka kokuqhekeka odongeni, okuthinta amandla nokubukeka okuphelele. I-HPMC ingakha ifilimu ebambe amanzi olimini lwesidakamizwa, ngokunciphisa ngempumelelo izinga lokuhwamuka kwamanzi odongeni, ngaleyo ndlela lehlise amathuba okuphela nokuqhekeka. Ngaphezu kwalokho, izakhiwo ezinhle zokugcina amanzi zisiza ukuthuthukisa ubuntu bodaka, ngaleyo ndlela kuthuthukise izakhiwo zalo ze-anti-free kanye ne-anti-permeability, okwenza udaka lusenokuqina okuphezulu ezindaweni ezinomswakama nokubanda.

I-3. Inani le-HPMC elingeziwe nezinto zalo ezinethonya
Ukusebenza kokugcinwa kwamanzi kwe-HPMC kuhlobene kakhulu nenani elingezwe kudaka. Ngokuvamile, inani le-HPMC elingeziwe liphakathi kuka-0,1% no-0.5%. Inani elithile lidinga ukulungiswa ngohlobo lodaka, imvelo yokwakha, njll. Ukungeza kakhulu i-HPMC kungenzeka kungahlangabezani nezidingo zokugcina amanzi, ngenkathi ukwengeza kakhulu kungadala ukuthi udaka lube ne-viscous futhi kunzima ukwakha. Ngakho-ke, kuzinhlelo zokusebenza ezisebenzayo, umthamo ofanele we-HPMC udinga ukunqunywa ngokusekelwe kwizidingo zodaka nomphumela wangempela.

Ngaphezu kwalokho, umphumela wokugcinwa kwamanzi we-HPMC nawo uzothinteka ngesisindo sawo samangqamuzana, izinga lokufaka esikhundleni, ubukhulu bezinhlayiyana nezinye izinto. Isibonelo, i-HPMC enesisindo esiphakeme samangqamuzana imvamisa inezakhiwo ezingcono zokugcina amanzi, kepha i-viscosity ibuye ikhuphuke ngokufanele, idinga ukulinganisela phakathi kokusebenza nokugcinwa kwamanzi. Ngaphezu kwalokho, izinga lokuchithwa kwe-HPMC lizothinta nomphumela wokugcinwa kwamanzi wodaka, ngakho-ke kuyadingeka ukuqinisekisa ukuthi kuncibilike ngokuphelele lapho ulungiselela udaka oluxutshwe ngokuphelele lapho ulungiselela udaka oluxubile.

4. Amathemba wohlelo lokusebenza kanye nokuthuthukiswa kwe-HPMC
Njengomenzeli wezemvelo ogcina amanzi, i-HPMC inamathemba wokusebenzisa abanzi. Njengezidingo zemboni yezokwakha zekhwalithi yezinto ezibonakalayo nokwakha amandla okusebenza kahle, i-HPMC iya ngokuya isetshenziswa ngodaka ngodaka olomile. Ngokuzayo, ucwaningo ku-HPMC luzoqhubeka lugxile ekuthuthukiseni ukusebenza kwalo kokugcina amanzi kanye nobungane bezemvelo. Isibonelo, ukusebenza kokugcinwa kwamanzi kanye nomphumela wokusebenzisa i-HPMC kungathuthukiswa ngokuguqulwa kwesakhiwo samangqamuzana, izithasiselo ze-compact, njll. Ngaphezu kwalokho, izinqubo zokukhiqiza ze-HPMC ezisebenzisa amandla aphansi kanye nokungcola okuphansi nakho kuzoba ukugxila kocwaningo.

Ukusetshenziswa kwe-HPMC ngodaka oluxutshwe kahle kuthuthukisa kakhulu ukusebenza kokugcinwa kwamanzi kodaka, ngaleyo ndlela kuthuthukise ukusebenziseka, ukuqinisa amandla nokuqina kodaka. Umphumela waso wokugcina amanzi oyingqayizivele awugcini ngokuqinisekisa ukusebenza okuzinzile kodaka ngesikhathi sokwakha, kepha futhi unwebe ngempumelelo impilo yenkonzo yodaka. Ngokuthuthukiswa kwemboni yezokwakha, ukusetshenziswa kwe-HPMC ku-st yodaka oluhlanganisiwe olomile luzoba ngcono ngokwengeziwe.