Into ye-viscomenosity yehla ngesikhathi sokubhala ngenkinga yinkinga evamile, ikakhulukazi ngemuva kokugcinwa isikhathi eside, ukubonakala kopende kuncipha kakhulu, kuthinta ukusebenza kokwakha kanye nekhwalithi yomkhiqizo. Ukwehla kwe-Viscosity kuhlobene nezinto eziningi, njengokushisa, umswakama, ukuguquguquka kwe-solvent, ukuwohloka kwe-polymer, njll.
1. Indima eyisisekelo ye-cellulose ether
I-Cellulose Ether iyisikhulu esivamile esisetshenziswa kabanzi kupende osuselwa emanzini. Imisebenzi yabo eyinhloko ifaka:
Umphumela Wokuqina
Umphumela wokukhulisa ukumiswa
Impahla eyakha ifilimu: I-cellulose ether ingathinta nempahla ekwakhiweni yefilimu yopende, okwenza ukuhlanganiswa kube nobunzima obuthile nokuqina.
Kunezinhlobo eziningi ze-cellulose afers, kufaka phakathi i-methyl cellulose (MC), i-hydroxyswethyl cellulose (HPMCypropyl Methyl cellulose (HPMC), njll. Lezi zinto zokwakha zine-soubing ehlukile, amandla okuqina kanye nokuqinisekiswa kokugcina ezitsheni.
2. Izizathu eziyinhloko zokuncishiswa kwe-viscosity
Ngesikhathi sokugcinwa kwezimbozo, ukuncishiswa kwe-viscosity ikakhulukazi kubangelwa yizizathu ezilandelayo:
(1) Ukuwohloka kwe-cellulose afers
Umphumela wokuqina we-cellulose izithathekisa ezikogqwaneni uncike ngosayizi wesisindo sabo sobumbano nobuqotho besakhiwo sabo se-molecular. Ngesikhathi sokugcina, izici ezinjengokushisa, i-acidity ne-alkalinity, futhi ama-microorganisms angadala ukonakala kwezithambeko ze-cellulose. Isibonelo, ngesikhathi sokugcina isikhathi eside, izakhi ze-acidic noma ze-alkali noma i-alkali noma i-adgaline zingahle zihlombe ama-molecular chain moleculate change we-cellulose ether, bese wehlisa isisindo sayo sokuqina, okuphumela ekunciphiseni kwawo, okuphumela ekunciphiseni kwayo, okuphumela ekunciphiseni kwayo, okuphumela ekunciphiseni kwayo, okuphumela ekunciphiseni kwayo, okuphumela ekunciphiseni kwayo, okuphumela ekunciphiseni kwayo, okuphumela ekunciphiseni kwayo, okuphumela ekunciphiseni kwayo, okuphumela ekunciphiseni kwayo, okuphumela ekunciphiseni kwayo, okuphumela ekunciphiseni kwayo, okuphumela ekunciphiseni kwayo, okuphumela ekunciphiseni kwayo, okuphumela ekunciphiseni kwayo, okuphumela ekunciphiseni kwayo.
(2) Solvent ukuguquguquka kanye nokufuduka komswakama
I-Solvent ukuguquguquka noma ukufuduka komswakama ku-coating kungathinta isimo sokulululwa se-cellulose ether. Ngesikhathi sokugcina, ingxenye yamanzi ingahle ihambile noma ifudukele ebusweni be-coating, yenza ukusatshalaliswa kwamanzi ku-coating ethethe kungavumi, ngaleyo ndlela kuthinte ukwehla kokuvuvukala ezindaweni zasendaweni.
(3) Ukuhlasela kwe-Microbial
Ukukhula kwe-microbial kungenzeka ku-coating lapho kugcinwa ngokungafanele noma abalondolozi behluleka. Ama-microorganisms angakwazi ukubola izitha ze-cellulose kanye nezinye izitha eziphilayo, anciphise amandla awo akhudlwana, adale ukubonwa kwenhlanganisela ukuncipha. Izambatho ezisuselwa emanzini, ikakhulukazi, ziyindawo enhle yokukhula ama-microbial ngoba aqukethe inani elikhulu lamanzi.
(4) ukuguga okuphezulu okuphezulu
Ngaphansi kwezimo zokugcina okushisa okuphezulu, isakhiwo somzimba noma samakhemikhali se-cellulose ether molecular chain singashintsha. Isibonelo, izithambiso ze-cellulose zithambekele kwi-oxidation noma i-pyrolysis emazingeni okushisa aphezulu, okuholela ekubeni buthaka komthelela wokuqina. Amazinga okushisa aphezulu abuye asheshise ukuguquguquka okuguquguqukayo kanye nokuhwamuka kwamanzi, okuthinta ukuqina kwento.
3. Izindlela zokuthuthukisa ukuqina kwesitoreji kwezimbali
Ukuze unciphise ukwehla okubonakalayo ngesikhathi sokugcinwa ngenkathi kunwetshwa impilo yokugcina ye-coating, izinyathelo ezilandelayo zingathathwa:
(1) Ukukhetha i-ether ye-cellulose efanelekile
Izinhlobo ezahlukahlukene ze-cellulose 'tiler zinokusebenza okuhlukile ngokuya ngokuqina kwesitoreji. I-Cellulose Afers enesisindo esiphakeme samangqamuzana ngokuvamile inemiphumela engcono yokuqina, kepha ukuqina kwabo kokugcina kumpofu, kuyilapho u-Cellulose Afers ngesisindo esiphansi samangqamuzana angahle abe nokusebenza okungcono kokugcina. Ngakho-ke, lapho uklama ifomula, i-cellulose afers enokuqina okuhle kwesitoreji kufanele kukhethwe, noma izithambisi ze-cellulose kufanele zihlanganiswe nabanye abakhulu ukuze bathuthukise ukumelana kwabo kwesitoreji.
(2) Lawula i-PH ye-coating
I-acidity kanye ne-alkalinity yohlelo lokuhlanganisa banethonya elibalulekile ekuzinweni kwe-cellulose afes. Emklamweni wokwakheka, inani le-PH le-coating kufanele lilawulwe ukuze ligweme indawo ene-acidic noma ye-alkaline ukuze inciphise ukonakala kwezimali ze-cellulose. Ngasikhathi sinye, engeza inani elifanele le-PH Adjuster noma i-Buffer kungasiza ukuqinisa i-PH yohlelo.
(3) Khulisa ukusetshenziswa kwezivikelo
Ukuze uvikele ukuguguleka kwe-microbial, inani elifanele lezinto ezilondoloziwe kufanele lingezwe ku-coating. Ukulondolozwa kungavimba ukukhula kwama-microorganisms, ngaleyo ndlela kuvimbele izinto eziphilayo ezifana ne-cellulose ether kusuka ekuboleni nokugcina ukuqina kokuhlanganiswa. Ama-volvatives afanele kufanele akhethwe ngokuya ngenhlamba yokuhlanganisa nendawo yokugcina, futhi ukusebenza kwawo kufanele kuhlolwe njalo.
(4) Lawula imvelo yokugcina
Izinga lokushisa eliyisitoreji nomswakama we-coatity ube nomthelela oqondile ekuzinzileni okubonakalayo. I-coating kufanele igcinwe endaweni eyomile futhi epholile, ukugwema izinga lokushisa eliphakeme kanye nezimo zomswakama ophezulu ukunciphisa ukuguquguquka kwe-solvent kanye nokuwohloka kwe-ether. Ngaphezu kwalokho, ukufakwa okukakwe kahle kunganciphisa ngempumelelo ukufuduka kanye nokufakelwa kwamanzi futhi kubambezele ukwehla okubonakalayo.
4. Ezinye izinto ezithinta ukubonakala
Ngaphezu kwezithambekela ze-cellulose, ezinye izakhi ohlelweni lokuhlanganisa nazo zingathinta noshintsho ekuboneni. Isibonelo, uhlobo kanye nokuqoqwa kwemibala, izinga lokuzithambisa kwama-solvents, kanye nokuhambisana kwabanye abakhulu noma abahluphi kungathinta ukuqina kokuqina kwenhlanganisela. Ngakho-ke, ukwakhiwa okuphelele kofomula yokuhlanganisa nokuxhumana phakathi kwezakhi nakho kuyindawo ebalulekile edinga ukunakwa.
Ukwehla okubonakalayo ngesikhathi sokugcinwa kwe-coating kuhlobene kakhulu nezinto ezifana nokuwohloka kwezithako ze-cellulose, solvent ukuguquguquka, kanye nokufuduka kwamanzi. Ukuze uthuthukise ukuqina kwesitoreji kwe-coating, kufanele kukhethwe izinhlobo ezifanele ze-cellulose erher Ngokwakheka kwefomula okunengqondo nokulawulwa kwesitoreji okuhle, inkinga yokuncipha kokuhlehlisa ngesikhathi sokugcina imali ekhokhwayo ingancishiswa ngempumelelo, futhi ukusebenza komkhiqizo kanye nokuncintisana kwemakethe kungathuthukiswa.
Isikhathi sePosi: Sep-27-2024