Ho ahlola boleng ba hydroxypropyl methyl cellulose

Jwalehydroxypropyl carboxymethyl cellulosemaraka a rekisoang ka ho eketsehileng, theko ha e leka-lekane, mokhoa oa ho potlakela ho hlakola boleng ba hydroxypropyl methyl cellulose e fetohile bothata ba bohlokoa! Joale mokhoa oa ho ahlola boleng ba hydroxypropyl methylcellulose? Ntho ea pele eo u lokelang ho e sheba ke bosoeu ba hydroxypropyl cellulose; Le hoja bosoeu bo ke ke ba hlaka hore na HPMC e loketse kopo, empa nakong ea ts'ebetso ho boetse ho na le baetsi ba bang ba babe ba tla eketsa moemeli oa whitening, ba tla senya boleng ba eona. Empa ka kakaretso, boholo ba cellulose ether e ntle haholo ke bosoeu bo betere.

Ea bobeli, ho bona botle ba hydroxypropyl methyl cellulose: hydroxypropyl carboxymethyl cellulose particle size of 80-100 mesh, 120 mesh less, hydroxyethyl cellulose HECHPMC e ka bang 100 mesh. HPMC bakeng sa boholo ba 60-80 mesh, general methyl cellulose softer, the better dispersion.

Tharollo ea ho hlaka ha cellulose ether:HPMCho kenya ka metsing ho hlahisa tharollo ea colloid e bonaletsang, bona ha qeto e phahame, e phahame, e sa qhale ntho ea lik'hemik'hale e tlase.

Ha thepa e futhumatsoa, ​​e kenngoa ka gelatinized kapa e kopane 'me ka mor'a moo e qhibilihe. E na le hydrophobic ebile e qhibiliha ka metsing. Konkreite ke eona ntho e ka sehloohong e kopanyang le ea demulsification ea phofo e sa keneleng metsi. Molao-motheo oa eona o thibelang metsi ke ka tsela e latelang: Nakong ea ho eketsa metsi le ho sisinya phofo ea latex e ka qhaqhoang hape le samente, phofo ea latex e lula e khutlela mofuteng oa pele oa emulsion, 'me likaroloana tsa latex li qhalakanngoa ka ho lekana ho peista ea samente. Ka mor'a hore samente e kopane le metsi, karabelo ea hydration e qala, 'me tharollo ea Ca (OH) 2 e fihla ho saturation le precipitates crystals,' me ka nako e ts'oanang, likristale tsa ettringite le calcium silicate hydrate colloids li hlahisoa. Likaroloana tsa latex li behiloe holim'a gel le likaroloana tsa samente tse se nang metsi. Ka tsoelo-pele ea karabelo ea hydration, lihlahisoa tsa hydration lia eketseha, 'me likaroloana tsa latex li bokelloa butle-butle ka ntle ho lisebelisoa tsa tlhaho tse kang samente,' me li etsa lera le haufi la ho bokella holim'a gel ea samente. Ka lebaka la phokotso ea butle-butle ea metsi a omileng, The ka thata-thata tletse redispersed latex likaroloana ka digels le voids condense ho etsa filimi e tsoelang pele, ho etsa motsoako oa samente peista interpenetrating matrix, 'me bonding peista samente le aggregates tse ling phofo.