Njengesixhobo esisetyenziswa ngokuqhelekileyo kumashishini ahlukeneyo, i-cellulose ether powder ine-adhesion egqwesileyo, ukuqina kunye nokugcinwa kwamanzi. Isetyenziswa kakhulu kulwakhiwo, amayeza, izithambiso, ukutya kunye nezinye iindawo ezininzi. Nangona kunjalo, ukufumana ukusebenza kakuhle kwi-cellulose ether powders, ingqwalasela kufuneka ihlawulwe kwinkqubo yayo yokutshatyalaliswa. Nazi ezinye izinto eziphambili ekufuneka uziqwalasele xa unyibilikisa i-cellulose ether powder:
1. Khetha isinyibilikisi esifanelekileyo
I-cellulose ether powder inyibilika kakhulu emanzini, yenza isisombululo esicacileyo, esibonakalayo. Nangona kunjalo, iintlobo ezahlukeneyo ze-cellulose ethers zinokunyibilika okwahlukileyo emanzini, kwaye ukunyibilika kwazo kuya kuchaphazeleka zizinto ezifana nobushushu kunye ne-pH. Ke ngoko, ukukhetha isinyibilikisi esifanelekileyo kwiziphumo ezizezona zibalulekileyo kubalulekile.
Ngokomzekelo, ukuba i-cellulose ether powder kufuneka ichithwe kwindawo yokushisa ephantsi okanye kwinkqubo ye-pH ephantsi, i-hydroxypropylmethylcellulose (HPMC) okanye i-methylcellulose (MC) ingaba ngcono kune-ethylcellulose (EC) okanye i-carboxylate Ukukhetha okungcono iMethylcellulose (CMC). Kubalulekile ukukhetha i-solvent efanelekileyo ngokuqwalasela iimfuno zesicelo kunye neempawu ze-solvent.
2. Lawula ubushushu
Ubushushu bungenye into ephambili echaphazela ukuchithwa kwe-cellulose ether powder. I-solubility ye-cellulose ethers iyanda kunye nobushushu, kodwa kunjalo nesantya sokuchithwa, esinokukhokelela kwi-agglomerated okanye i-agglomerated powders. Ngoko ke, iqondo lokushisa kufuneka lilawulwe ngokucophelela ngexesha lenkqubo yokuchithwa.
Ngokuqhelekileyo, elona qondo lobushushu lifanelekileyo lokunyibilikisa i-cellulose ether yi-20-40°C. Ukuba iqondo lokushisa liphantsi kakhulu, kunokuba yimfuneko ukwandisa ixesha lokuchithwa okanye ukusebenzisa i-solvent efanelekileyo. Ukuba ubushushu buphezulu kakhulu, kunokubangela ukuthotywa kwe-cellulose ether kwaye kuchaphazele ukusebenza kwayo.
3. Gxuma kwaye udibanise
Ukuvuselela kunye nokuphazamiseka kubalulekile xa kuchithwa i-cellulose ether powder. Ukuphazamiseka okufanelekileyo kunceda umgubo ukuba usasazeke ngokulinganayo kwi-solvent kwaye uthintele ukuxubha. Ukuvuselela kwakhona kunceda ukunyusa izinga lokuchithwa, ngakumbi kwizisombululo eziphezulu ze-viscosity.
Nangona kunjalo, ukuphazamiseka okugqithisileyo kunokuvelisa amaqamza omoya okanye i-foam, enokuchaphazela ukucaca kunye nokuzinza kwesisombululo. Ngoko ke, kuyimfuneko ukulungelelanisa isantya esishukumisayo kunye nokuqina ngokweemfuno ezithile kunye nokusingqongileyo kwesicelo se-cellulose ether powder.
4. Izongezo
Izongezo zinokongezwa ngexesha lokuchithwa kwe-cellulose ether powder ukuphucula ukusebenza kwayo okanye ukuzinza. Ngokomzekelo, i-borax okanye ezinye izinto ze-alkali zingongezwa ukulungisa i-pH yesisombululo kunye nokwandisa i-viscosity. I-sodium bicarbonate nayo yandisa i-viscosity yesisombululo, inciphisa izinga lokuchithwa.
Ezinye izongezo ezifana ne-surfactants, iityuwa okanye iipolymers zinokusetyenziswa ukunyusa ukunyibilika, ukuzinza okanye ezinye iimpawu zesisombululo se-cellulose ether. Nangona kunjalo, kubalulekile ukusebenzisa izongezo ngokumodareyitha kwaye ukhethe ngokucophelela, njengoko izongezo ezigqithisileyo okanye ezingafanelekanga zinokubangela iziphumo ezingafunekiyo.
5. Ukuphelisa ixesha
Ixesha lokuchithwa liyipharamitha ebalulekileyo kwimveliso kunye nokusetyenziswa kwe-cellulose ether powder. Ixesha lokuchithwa lixhomekeke kwizinto ezininzi ezifana nohlobo lwe-cellulose ether, i-solvent, iqondo lokushisa, isantya esishukumisayo kunye nokugxila.
Ngokuqhelekileyo, i-cellulose ether powder kufuneka yongezwe kwi-solvent ngokuthe ngcembe kwaye ngokuthe ngcembe ngokuxutywa rhoqo de kufumaneke isisombululo se-homogeneous. Amaxesha okuphelisa anokwahluka ukusuka kwimizuzu embalwa ukuya kwiiyure ezininzi, kuxhomekeke kwizinto ezikhankanywe ngasentla.
Kubalulekile ukubeka iliso ngokucokisekileyo inkqubo yokuchithwa kunye nokulungelelanisa iiparitha njengoko kufuneka ukuqinisekisa umgangatho kunye nokuhambelana kwesisombululo se-cellulose ether.
Ukuqukumbela, i-cellulose ether powder yinto eguquguqukayo kwaye ixabisekileyo kwiinkalo ezahlukeneyo zoshishino. Nangona kunjalo, inkqubo yokuphelisa ibalulekile ukuphumeza ukusebenza kwayo ngokupheleleyo. Ngokunikela ingqalelo kwizinto ezifana nokukhethwa kwe-solvent, ulawulo lobushushu, ukuvuselela, izongezo, kunye nexesha lokuchithwa, kunokwenzeka ukufumana isisombululo se-cellulose ether ephezulu ehlangabezana neemfuno zesicelo.
Ixesha lokuposa: Aug-18-2023