Mokhoa o motenya oahydroxyethyl celluloseke ho eketsa viscosity ka ho thehoa ha intermolecular le intramolecular hydrogen bonds, hammoho le hydration le ketane entanglement ea liketane tsa molek'hule. Ka hona, mokhoa o teteaneng oa hydroxyethyl cellulose o ka aroloa ka likarolo tse peli: e 'ngoe ke karolo ea li-intermolecular le intramolecular hydrogen bonds. Ketane e kholo ea hydrophobic e amahanngoa le limolek'hule tsa metsi tse potolohileng ka li-hydrogen bond, tse ntlafatsang metsi a polymer ka boeona. Bophahamo ba likaroloana bo fokotsa sebaka sa ho tsamaea ka bolokolohi ha likaroloana, kahoo ho eketsa viscosity ea tsamaiso; ea bobeli, ka ho ts'oaroa le ho fetana ha liketane tsa limolek'hule, liketane tsa cellulose li ka har'a sebopeho sa marang-rang se nang le mahlakore a mararo tsamaisong eohle, ka tsela eo ho ntlafatsa viscosity.
A re shebeng hore na selulose e phetha karolo joang ho boloka botsitso ba tsamaiso: pele, karolo ea litlamo tsa hydrogen e thibela ho phalla ha metsi a sa lefelloeng, e phetha karolo ea ho boloka metsi, 'me e kenya letsoho ho thibela ho arohana ha metsi; ea bobeli, ho sebelisana ha liketane tsa cellulose The lap entanglement e etsa marang-rang a marang-rang kapa sebaka se arohaneng pakeng tsa li-pigment, li-fillers le likaroloana tsa emulsion, tse thibelang ho rarolla.
Ke motsoako oa mekhoa e 'meli e ka holimo ea ts'ebetso e nolofalletsanghydroxyethyl celluloseho ba le bokgoni bo botle haholo ba ho ntlafatsa botsitso ba polokelo. Ha ho etsoa pente ea latex, HEC e ekelitsoeng nakong ea ho otla le ho qhalakanngoa e eketseha ka ho eketseha ha matla a ka ntle, lebelo la lebelo la shear le eketseha, limolek'hule li hlophisitsoe ka tsela e hlophisehileng e tsamaisanang le tataiso ea phallo, 'me tsamaiso ea liphahlo pakeng tsa liketane tsa limolek'hule e senyeha, e leng bonolo ho Sliding e mong le e mong, tsamaiso ea viscosity e fokotseha. Kaha tsamaiso e na le likarolo tse ling tse ngata (li-pigments, li-fillers, emulsions), tokisetso ena e hlophisitsoeng e ke ke ea tsosolosa boemo bo ts'oarellang ba ho kopanya le ho kopanya le haeba e behiloe nako e telele ka mor'a hore pente e kopane. Tabeng ena, HEC e itšetlehile feela ka litlamo tsa hydrogen. Phello ea ho boloka metsi le ho teteana ho fokotsa bokhoni bo matla baHEC, 'me tlatsetso ea boemo bona ba ho hasana ho boloka botsitso ba tsamaiso le eona e fokotsehile ka tsela e nepahetseng. Leha ho le joalo, HEC e qhibilihisitsoeng e ile ea qhalakanngoa ka mokhoa o ts'oanang tsamaisong ka lebelo le tlaase la ho sisinyeha nakong ea letdown, 'me mohaho oa marang-rang o entsoeng ke ho hokahanya ha liketane tsa HEC o ne o sa senyeha hakaalo. Ka tsela eo e bonts'a katleho e phahameng ea thickening le botsitso ba polokelo. Ho hlakile hore ts'ebetso ea nako e le 'ngoe ea mekhoa e' meli ea ho tenya ke motheo oa ho tenya ha selulose hantle le ho netefatsa botsitso ba polokelo. Ka mantsoe a mang, boemo bo qhibilihisitsoeng le bo qhalakaneng ba selulose ka metsing bo tla ama ka ho teba phello ea eona e teteaneng le tlatsetso ea eona ho boloka botsitso.
Nako ea poso: Apr-25-2024