Njengesixhobo esisetyenziswa rhoqo kumashishini ahlukeneyo, umgubo we-cellulose ether unomqamelo ogqwesileyo, utyeba kwaye ugcina amanzi. Usetyenziswa kakhulu ekwakheni, kumayeza, kwizinto zokuthambisa, ekutyeni nakwezinye iindawo ezininzi. Nangona kunjalo, ukuze ufumane ukusebenza okuhle kakhulu kwi-cellulose ether powders, kufuneka kuqwalaselwe inkqubo yayo yokunyibilika. Nazi ezinye izinto ezibalulekileyo ekufuneka ziqwalaselwe xa kunyibilika umgubo we-cellulose ether:
1. Khetha isinyibilikisi esifanelekileyo
Umgubo we-cellulose ether uyanyibilika kakhulu emanzini, nto leyo eyenza isisombululo esicacileyo nesiqinileyo. Nangona kunjalo, iintlobo ezahlukeneyo ze-cellulose ethers zinyibilika ngokwahlukileyo emanzini, kwaye ukunyibilika kwazo kuya kuchaphazeleka zizinto ezifana nobushushu kunye ne-pH. Ke ngoko, ukukhetha isinyibilikisi esifanelekileyo ukuze ufumane iziphumo ezilungileyo kubalulekile.
Umzekelo, ukuba umgubo we-cellulose ether kufuneka unyibilikiswe kwindawo enobushushu obuphantsi okanye kwinkqubo ye-pH ephantsi, i-hydroxypropylmethylcellulose (HPMC) okanye i-methylcellulose (MC) inokuba ngcono kune-ethylcellulose (EC) okanye i-carboxylate Better Choice Methylcellulose (CMC). Kubalulekile ukukhetha i-solvent efanelekileyo xa ucinga ngeemfuno zokusetyenziswa kunye neempawu ze-solvent.
2. Ubushushu bolawulo
Ubushushu yenye into ebalulekileyo echaphazela ukunyibilika komgubo we-cellulose ether. Ukunyibilika kwee-cellulose ethers kuyanda ngobushushu, kodwa nesantya sokunyibilika siyanda, nto leyo enokukhokelela kwimigubo ehlanganisiweyo okanye ehlanganisiweyo. Ke ngoko, ubushushu kufuneka bulawulwe ngononophelo ngexesha lenkqubo yokunyibilika.
Ngokubanzi, ubushushu obufanelekileyo bokunyibilikisa i-cellulose ether yi-20-40°C. Ukuba ubushushu buphantsi kakhulu, kungafuneka ukuba ixesha lokunyibilikisa liyonyuswe okanye kusetyenziswe isinyibilikisi esifanelekileyo. Ukuba ubushushu buphezulu kakhulu, bunokubangela ukuwohloka kwe-cellulose ether kwaye buchaphazele ukusebenza kwayo.
3. Xuba kwaye uxube
Ukuxuba kunye nokuxuba kubalulekile xa kunyibilikiswa umgubo we-cellulose ether. Ukuxuba ngokufanelekileyo kunceda umgubo ukuba usasazeke ngokulinganayo kwisinyibilikisi kwaye kuthintele ukuxinana. Ukuxuba kukwanceda ukwandisa izinga lokunyibilika, ingakumbi kwizisombululo eziphezulu ze-viscosity.
Nangona kunjalo, ukushukuma okugqithisileyo kunokuvelisa amaqamza omoya okanye igwebu, okunokuchaphazela ukucaca nokuzinza kwesisombululo. Ke ngoko, kuyimfuneko ukulungisa isantya sokushukuma kunye nokuqina ngokweemfuno ezithile kunye nendawo yokusetyenziswa kwe-cellulose ether powder.
4. Izongezo
Izongezo zingongezwa ngexesha lokunyibilika komgubo we-cellulose ether ukuphucula ukusebenza okanye ukuzinza kwawo. Umzekelo, i-borax okanye ezinye izinto ze-alkaline zingongezwa ukulungisa i-pH yesisombululo kunye nokunyusa i-viscosity. I-Sodium bicarbonate ikwanyusa i-viscosity yesisombululo, inciphisa isantya sokunyibilika.
Ezinye izongezo ezifana nee-surfactants, iityuwa okanye ii-polymers zingasetyenziselwa ukuphucula ukunyibilika, uzinzo okanye ezinye iimpawu zesisombululo se-cellulose ether. Nangona kunjalo, kubalulekile ukusebenzisa izongezo ngokulinganisela kwaye ukhethe ngononophelo, njengoko izongezo ezigqithisileyo okanye ezingafanelekanga zinokubangela iziphumo ebezingalindelekanga.
5. Ixesha lokunyibilikisa
Ixesha lokunyibilika liyiparameter ebalulekileyo ekuvelisweni nasekusetyenzisweni komgubo we-cellulose ether. Ixesha lokunyibilika lixhomekeke kwizinto ezininzi ezifana nohlobo lwe-cellulose ether, i-solvent, ubushushu, isantya sokuxukuxa kunye noxinzelelo.
Ngokubanzi, umgubo we-cellulose ether kufuneka wongezwe kwi-solvent kancinci kancinci ngokuxuba rhoqo de kufunyanwe isisombululo esifanayo. Amaxesha okunyibilika anokwahluka ukusuka kwimizuzu embalwa ukuya kwiiyure ezininzi, kuxhomekeke kwizinto ezikhankanyiweyo apha ngasentla.
Kubalulekile ukujonga ngononophelo inkqubo yokunyibilika kunye nokulungisa iiparameter njengoko kufuneka ukuqinisekisa umgangatho kunye nokuhambelana kwesisombululo se-cellulose ether.
Ukuqukumbela, umgubo we-cellulose ether sisixhobo esisebenziseka ngeendlela ezahlukeneyo nesixabisekileyo kwiindawo ezahlukeneyo zoshishino. Nangona kunjalo, inkqubo yokunyibilika ibalulekile ukuze kufezekiswe ukusebenza kwayo okufanelekileyo. Ngokunika ingqalelo kwizinto ezifana nokukhethwa kwesinyibilikisi, ulawulo lobushushu, ukuxukuxa, izongezo, kunye nexesha lokunyibilika, kunokwenzeka ukufumana isisombululo se-cellulose ether esisemgangathweni ophezulu esihlangabezana neemfuno zesicelo.
Ixesha lokuthumela: Agasti-18-2023