Ngokumalunga nobushushu bejeli yehydroxypropyl methyl celluloseHPMC, abasebenzisi abaninzi abafane banikele ingqalelo kubushushu bejeli ye-hydroxypropyl methyl cellulose. Ngoku i-hydroxypropyl methyl cellulose ngokubanzi iyahlukaniswa ngokwe-viscosity yayo, kodwa kwezinye iindawo ezikhethekileyo kunye namashishini akhethekileyo, akwanelanga ukubonisa kuphela i-viscosity yemveliso. Oku kulandelayo kwazisa ngokufutshane ubushushu bejeli ye-hydroxypropyl methylcellulose.
Umxholo wamaqela e-methoxy uhambelana ngokuthe ngqo kwinqanaba le-dialysis ye-cellulose, kwaye umxholo wamaqela e-methoxy unokulungiswa ngokulawula ifomula, ubushushu bokuphendula kunye nexesha lokuphendula. Ngexesha elifanayo, iqondo le-carboxylation lichaphazela iqondo lokutshintshwa kwe-hydroxyethyl okanye i-hydroxypropyl. Ke ngoko, ukugcinwa kwamanzi kwi-cellulose ethers ezinobushushu obuphezulu bejeli ngokuqhelekileyo kubi kancinci. Le nkqubo yokuvelisa kufuneka ihlolwe, ngoko ke akukhona ukuba umxholo weqela le-methoxy uphantsi, ixabiso lokuvelisa i-cellulose ether liphantsi, ngokuchaseneyo, ixabiso layo liya kuba phezulu.
Ukushisa kwe-gel kunqunywe liqela le-methoxy, kwaye ukugcinwa kwamanzi kunqunywe liqela le-hydroxypropoxy. Kukho amaqela amathathu kuphela athatha indawo ye-cellulose. Fumana ubushushu bakho obufanelekileyo bokusebenzisa, ukugcinwa kwamanzi okufanelekileyo, kwaye emva koko umisele imodeli yale cellulose.
Ubushushu bejeli buyinto ebalulekileyo ekusetyenzisweni kwei-cellulose ether. Xa ubushushu be-ambient budlula ubushushu be-gel, i-ether ye-cellulose iya kuhlukana namanzi kwaye ilahlekelwe ukugcinwa kwamanzi. Ukushisa kwe-gel ye-cellulose ether kwimarike kunokwanelisa ngokusisiseko iimfuno zokusingqongileyo apho kusetyenziswa udaka (ngaphandle kweendawo ezikhethekileyo). Abavelisi kufuneka bakuthathele ingqalelo oku.
Ixesha lokuposa: Apr-26-2024