1. Uhlobo lomkhiqizo kanye nokucaciswa
Kunezinhlobo eziningi zemikhiqizo ye-cellulose ether, futhi izinhlobo ezahlukene zinomehluko osobala ekusebenzeni. Ama-cellulose ether ajwayelekile ahlanganisa i-hydroxypropyl methylcellulose (HPMC), i-hydroxyethyl cellulose (HEC), i-carboxymethyl cellulose (CMC), njll. Le mikhiqizo inezinkambu zokusetshenziswa ezihlukene nezici ngokuya ngezakhiwo zamakhemikhali ezihlukene nezinqubo zokukhiqiza.
I-HPMC: Isetshenziswa kakhulu ezintweni zokwakha, imithi, ukudla kanye neminye imikhakha, enokuqina okuhle, ukwakheka kwefilimu, ukugcinwa kwamanzi nokunamathela.
I-HEC: Isetshenziswa kakhulu ezingubo zokugqoka, izinto zokunamathisela, okokuhlanza, ezinokuqina okuhle kakhulu, ukuzinza kanye nokuncibilika kwamanzi.
I-CMC: Isetshenziswa kabanzi ezimbonini zokudla, zamakhemikhali zansuku zonke nezikhiqiza amaphepha, futhi inemiphumela emihle yokujiya nokusimamisa.
Lapho ukhetha uhlobo olufanele lwe-cellulose ether, kuyadingeka ukucacisa inkambu yesicelo sayo, izidingo zokusebenza kanye nokucaciswa okuqondile, njenge-viscosity, izinga lokufaka esikhundleni, njll.
2. I-Viscosity
I-viscosity yemikhiqizo ye-cellulose ether iyinkomba yokusebenza eyinhloko, ezothinta ngokuqondile izakhiwo ze-rheological, i-solubility kanye nomphumela wokusetshenziswa komkhiqizo. I-viscosity ye-cellulose ether ingalungiswa ngokuya ngezidingo zohlelo lokusebenza:
I-high viscosity cellulose ether: isetshenziswa ikakhulukazi ezinhlelweni ezidinga umphumela oqinile wokujiya kanye nokugcinwa kwamanzi okuphezulu, njengodaka lokwakha nezinto ezinamathelayo. Lolu hlobo lwe-cellulose ether lungathuthukisa ukugcinwa kwamanzi nokusebenza kwento.
I-viscosity cellulose ether ephansi: isetshenziswa kakhulu ezinhlelweni ezinokuncibilika okuphezulu kanye nezidingo zoketshezi, njengezinto zokumboza, okokuhlanza nezinye izinkambu, okusiza ukuthuthukisa uketshezi kanye nokushelela kwendawo.
Ukuphakama kwe-viscosity, kunzima kakhulu ukuhlakazeka. Ngakho-ke, ukukhethwa kwemikhiqizo ene-viscosity efanelekile kudinga ukucatshangelwa okuphelele kokwakhiwa noma ukucubungula ukusebenza kanye nezidingo zemikhiqizo yokugcina.
3. Iziqu zokushintsha kanye nohlobo lokushintsha
Izici zamakhemikhali nezici zokusetshenziswa kwe-cellulose ether zincike ohlotsheni kanye nenani lamaqembu alo angena esikhundleni. Izinga lokushintsha lisho izinga amaqembu e-hydroxyl ku-molecule ye-cellulose ashintshwa ngayo, ngokuvamile evezwa njengesilinganiso senani lokushintshwa ngeyunithi ngayinye ye-glucose (isibonelo, i-hydroxypropyl, i-methyl, i-carboxymethyl, njll.). Uhlobo nezinga lokushintshwa kwe-substitute kuthinta ngqo ukuncibilika, ikhono elijiyayo kanye nokumelana nosawoti we-cellulose ether.
Izinga eliphakeme lokushintshwa kwe-cellulose ether: inokuncibilika okuhle kwamanzi kanye nezinga lokushisa eliphansi le-gelation, lilungele izinhlelo zokusebenza ezidinga ukuncibilika kwamanzi okuphezulu noma ukusebenza kwezinga lokushisa eliphansi.
Idigri ephansi ye-substitution cellulose ether: ingaba nezinga lokushisa eliphezulu lejeli kanye nokuncibilika okungekuhle kwamanzi, kulungele izinkambu ezikhethekile ezifana nokuhlola insimu kawoyela noma indawo yokushisa ephezulu.
Ngaphezu kwalokho, izinto ezihlukile zizonikeza ama-ether e-cellulose amakhemikhali ahlukene, njenge-carboxymethyl cellulose inokumelana nosawoti okungcono kanye nokuzinza kwesisombululo.
4. Ukuncibilika
Imikhiqizo ye-cellulose ether yekhwalithi ephezulu idinga ukuba ne-solubility enhle ukuze ihlakazeke ngokushesha futhi yenze isisombululo esizinzile ngesikhathi sokusetshenziswa. Ukunyibilika kuthintwa izinto ezifana nokuthatha indawo, i-viscosity, nosayizi wezinhlayiyana zomkhiqizo. Ama-ether e-cellulose amahle kufanele akwazi ukuncibilika ngokushesha emanzini abandayo ukuze akhe isixazululo se-colloidal esifanayo, futhi awathambekele ekuhlanganiseni noma ekuhlakazekeni okungalingani.
Izinkomba ezifana nezinga lokuqedwa kanye nokucaca kwesixazululo nokuzinza kwe-viscosity kuthinta ngokuqondile ukusebenza komkhiqizo ezinhlelweni zangempela. Ngakho-ke, lapho ukhetha i-cellulose ether, kuyadingeka ukuqinisekisa ukuthi inokunyibilika okuphezulu nokuzinza endaweni esetshenzisiwe.
5. Usayizi wezinhlayiya
Usayizi wezinhlayiyana zemikhiqizo ye-cellulose ether uzophinde uthinte izinga layo lokuqedwa kanye nomthelela wokusetshenziswa. Ama-ether e-fine-particle cellulose ngokuvamile ancibilika ngokushesha futhi ahlakazeke ngokulinganayo, alungele izigcawu zokwakhiwa okusheshayo noma ukucutshungulwa, kuyilapho ama-ether e-cellulose eyizinhlayiyana ezimahhadla angase ancibilike kancane, kodwa angahlala isikhathi eside kwezinye izinhlelo zokusebenza.
Ngokuvamile, usayizi wezinhlayiyana ze-cellulose ether ukhonjiswa kulebula yomkhiqizo, futhi abakhiqizi bangakwazi futhi ukwenza ngokwezifiso imikhiqizo yamasayizi ezinhlayiyana ahlukene ngokwezidingo zomsebenzisi ukuze ivumelane nezinqubo ezahlukene zokusebenza.
6. Ukuhlanzeka kanye nokuzinza kwekhwalithi yemikhiqizo
Ikhwalithi ye-cellulose ether ithinta ngokuqondile umphumela wayo wokufaka isicelo, ikakhulukazi emikhakheni enezidingo zekhwalithi ephezulu njengokudla nemithi, ukuhlanzeka komkhiqizo kuyisici esibalulekile. I-high-purity cellulose ether kufanele iqukathe ukungcola okumbalwa futhi ngeke ibe nomthelela omubi kumbala, iphunga, ukunambitheka nokusebenza komkhiqizo wokugcina.
Ngaphezu kwalokho, ukuzinza kwekhwalithi yomkhiqizo nakho kubalulekile. Ukuze kuqinisekiswe ukuhambisana komkhiqizo kumaqoqo ahlukene, kuyadingeka ukukhetha umenzi onohlelo oluqinile lokulawula ikhwalithi. Ukuzinza kwekhwalithi yesikhathi eside kunganciphisa umehluko ongenzeka ngesikhathi sokusetshenziswa, ngaleyo ndlela kuqinisekiswe imiphumela engaguquki isikhathi ngasinye.
7. Iziqu kanye nezinsizakalo zabahlinzeki
Ukukhetha umphakeli we-cellulose ether onokwethenjelwa nakho kubalulekile. Umhlinzeki wekhwalithi ephezulu akufanele nje abe namandla okukhiqiza amahle kanye nokulawula ikhwalithi, kodwa futhi akwazi ukuhlinzeka ngosizo lobuchwepheshe obuchwepheshile kanye nesevisi yangemuva kokuthengisa.
Iziqu zomphakeli: Qonda iziqu zokukhiqiza zomphakeli, ulwazi lwemboni, isimo sokuthola isitifiketi (njengesitifiketi se-ISO, njll.) nokuthi unazo yini izidingo zemfundo emikhakheni ehlobene.
Ukwesekwa kobuchwepheshe: Abahlinzeki abahle kakhulu kufanele bakwazi ukunikeza isiqondiso sohlelo lokusebenza lomkhiqizo ngokwezidingo zamakhasimende ukuze baqinisekise ukuthi amakhasimende angasebenzisa imikhiqizo ngendlela efanele futhi azuze imiphumela engcono kakhulu.
Isevisi yangemuva kokuthengisa: Kubalulekile futhi ukukhetha abahlinzeki abangahlinzeka ngosizo lobuchwepheshe olufika ngesikhathi kanye nezixazululo zokuxazulula izinkinga.
8. Izindleko nokusebenza kahle kwezindleko
Intengo yemikhiqizo ye-cellulose ether iyahlukahluka kuye ngekhwalithi, umkhiqizo, kanye nokucaciswa. Lapho ukhetha umkhiqizo, akufanele nje uphishekele intengo ephansi, kodwa kufanele ucabangele ngokucophelela ukusebenza kwawo, umphumela wohlelo, kanye nezindleko zokusebenzisa. Kwezinye izimo, nakuba ama-ether e-cellulose ekhwalithi ephezulu ebiza kakhulu, abonisa ukusebenza okungcono ekusetshenzisweni, angathuthukisa ukusebenza kahle kokukhiqiza noma athuthukise ikhwalithi yomkhiqizo, futhi abe nempumelelo ephezulu yezindleko.
Uma ufuna imikhiqizo yekhwalithi ephezulu ye-cellulose ether, kufanele ucabange ngokucophelela uhlobo lomkhiqizo, i-viscosity, izinga lokushintshwa, ukuncibilika, usayizi wezinhlayiyana, ubumsulwa, kanye nokuzinza kwekhwalithi ngokwezidingo zangempela zohlelo, futhi uhlole iziqu kanye nezinsizakalo zomphakeli. Kuphela ngokuqhathanisa ngokuphelele ukusebenza nokusebenza ngempumelelo kwezindleko zemikhiqizo ehlukene singakwazi ukuthola ama-cellulose ether afanelekile ukuze ahlangabezane nezidingo zezimboni ezithile nezimo zokusebenzisa.
Isikhathi sokuthumela: Sep-13-2024