Mokhoa oa ho ntlafatsa ho boloka metsi a hydroxypropyl methylcellulose

Hydroxypropyl methylcellulose ke motsoako o sebelisoang haholo ka har'a seretse se omeletseng sa phofo. Cellulose ether e phetha karolo ea bohlokoa ho seretse sa phofo se omileng. Ka mor'a hore cellulose ether ka seretse e qhibilihe, mosebetsi oa holim'a metsi o etsa bonnete ba hore thepa ea cementitious ke Sistimi e tsamaisoa ka mokhoa o ts'oanang hantle, 'me cellulose ether, e le colloid e sireletsang, "e phuthela" likaroloana tse tiileng ebe e etsa lesela la filimi e tlotsang ka ntle ho eona. holim'a metsi, ho etsa hore tsamaiso ea seretse e be e tsitsitseng le ho ntlafatsa ho phalla ha seretse nakong ea thepa ea ho kopanya le ho boreleli ha mohaho.

Hydroxypropyl methylcellulose HPMC e na le ts'ebetso e ntle ea ho boloka metsi, e ka thibelang mongobo ka har'a seretse se metsi ho tsoa mouoane pele ho nako kapa ho kenngoa ke lera la motheo, ho etsa bonnete ba hore samente e na le metsi ka ho feletseng, kahoo qetellong e netefatsa thepa ea mochine ea seretse, e leng molemo ka ho khetheha. ho likarolo tse tšesaane Seretse le setsi se monyang kapa seretse se sebelisoang tlas'a mocheso o phahameng le maemo a omileng. Phello ea ho boloka metsi ea hydroxypropyl methylcellulose ether e ka fetola mokhoa o tloaelehileng oa kaho le ho ntlafatsa tsoelo-pele ea kaho. Ka mohlala, kaho ea plastering e ka etsoa holim'a li-substrates tse monyang metsi ntle le ho kolobisa pele.

Viscosity, litekanyetso, mocheso o teng le sebopeho sa limolek'hule tsa hydroxypropyl methylcellulose HPMC li na le tšusumetso e kholo ts'ebetsong ea eona ea ho boloka metsi. Tlas'a maemo a tšoanang, ho ba le viscosity e kholo ea cellulose ether, ho boloka metsi ho molemo; ha tekanyo e phahame, ho boloka metsi ho molemo. Hangata, palo e nyane ea cellulose ether e ka ntlafatsa haholo ho bolokoa ha seretse. Ha tekanyo e fihla ho itseng Ha tekanyo e phahame, tekanyo ea ho boloka metsi e eketseha butle-butle; ha mocheso oa tikoloho o phahama, ho bolokoa ha metsi a cellulose ether hangata ho fokotseha, empa li-ether tse ling tse fetotsoeng tsa cellulose le tsona li na le ho boloka metsi hamolemo tlas'a maemo a phahameng a mocheso; cellulose e nang le tekanyo e tlaase ea ho fetola Ether e boloka metsi hamolemo.

Sehlopha sa hydroxyl ka molek'hule ea HPMC le athomo ea oksijene holim'a tlamahano ea ether e tla kopana le molek'hule ea metsi ho etsa tlamo ea hydrogen, ho fetola metsi a sa lefelloeng hore e be metsi a tlamiloeng, kahoo a bapala karolo e ntle ea ho boloka metsi; limolek'hule tsa metsi le selulose Ho kopanya pakeng tsa liketane tsa limolek'hule tsa ether ho etsa hore limolek'hule tsa metsi li kene ka hare ho liketane tse kholo tsa cellulose ether 'me li tlas'a matla a matla a tlamang, kahoo ho etsa metsi a sa lefelloeng le metsi a ferekaneng, a ntlafatsang ho boloka metsi a seretse; cellulose ether e ntlafatsa ho bolokoa ha metsi a sa tsoa tsoakoa Thepa ea rheological, sebopeho sa marang-rang sa porous le khatello ea osmotic ea peista ea samente kapa thepa ea ho etsa filimi ea cellulose ether e sitisa ho ata ha metsi. Leha ho le joalo, ka lebaka la ts'ebetso e sa khotsofatseng ea ho boloka metsi ea cellulose ether ea hona joale, seretse se na le momahano e fokolang le ts'ebetso e mpe ea kaho, 'me seretse se atisa ho petsoha, sekoti le ho oa ka mor'a ho hahoa.