Kakaretso:
Lilemong tsa morao tjena, liphahlo tse thehiloeng metsing li fumane tlhokomelo e atileng ka lebaka la botsoalle ba tsona ba tikoloho le litaba tse tlase tsa "volatile organic compound" (VOC). Hydroxyethylcellulose (HEC) ke polima e qhibilihang ka metsing e sebelisoang ka bongata mefuteng ena, e sebetsang e le motenya ho eketsa viscosity le ho laola rheology.
tsebisa:
1.1 Tšimoloho:
Liaparo tse entsoeng ka metsi li fetohile mokhoa o mong oa botsoalle oa tikoloho ho feta litlolo tsa setso tse thehiloeng ho solvent, ho rarolla mathata a amanang le mesi e sa tsitsang ea metsoako ea lintho tse phelang le phello ea tikoloho. Hydroxyethylcellulose (HEC) ke motsoako oa cellulose oo e leng motsoako oa bohlokoa oa ho etsa liphahlo tse thehiloeng metsing 'me o fana ka taolo ea rheology le botsitso.
1.2 Maikemisetso:
Sehlooho sena se ikemiseditse ho hlakisa litšobotsi tsa ho qhibiliha ha HEC ka liaparo tse thehiloeng metsing le ho ithuta tšusumetso ea lintlha tse sa tšoaneng ka viscosity ea eona. Ho utloisisa lintlha tsena ho bohlokoa bakeng sa ho ntlafatsa liforomo tsa coating le ho fihlela ts'ebetso e lakatsehang.
Hydroxyethylcellulose (HEC):
2.1 Sebopeho le tšebetso:
HEC ke derivative ea cellulose e fumanoang ke karabelo ea etherification ea selulose le ethylene oxide. Ho kenngoa ha lihlopha tsa hydroxyethyl mokokotlong oa cellulose ho tlatsetsa ho qhibiliha ha metsi 'me ho etsa hore e be polima ea bohlokoa tsamaisong ea metsi. Sebopeho sa limolek'hule le thepa ea HEC e tla tšohloa ka ho qaqileng.
Ho qhibiliha ha HEC metsing:
3.1 Lintlha tse amang solubility:
Ho qhibiliha ha HEC metsing ho angoa ke lintlha tse 'maloa, ho kenyelletsa mocheso, pH le mahloriso. Lintlha tsena le phello ea tsona holim'a ho qhibiliha ha HEC li tla tšohloa, ho fana ka temohisiso ka maemo a lumellang ho felisoa ha HEC.
3.2 Moeli oa ho qhibiliha:
Ho utloisisa meeli e ka holimo le e tlaase ea ho qhibiliha ha HEC metsing ke habohlokoa ho etsa liaparo tse nang le ts'ebetso e nepahetseng. Karolo ena e tla shebana le mefuta ea mahloriso eo HEC e bonts'ang ho qhibiliha ho hoholo le litlamorao tsa ho feta meeli ena.
Ntlafatsa viscosity ka HEC:
4.1 Karolo ea HEC ho viscosity:
HEC e sebelisoa e le motenya ka har'a liaparo tse thehiloeng metsing ho thusa ho eketsa viscosity le ho ntlafatsa boitšoaro ba rheological. Mekhoa eo HEC e finyellang taolo ea viscosity ka eona e tla hlahlojoa, e totobatsang ho sebelisana ha eona le limolek'hule tsa metsi le lisebelisoa tse ling ha ho etsoa liaparo.
4.2 Phello ea mefuta e fapaneng ea foromo ho viscosity:
Mefuta e fapa-fapaneng ea tlhahiso, ho kenyelletsa mahloriso a HEC, mocheso, le sekhahla sa ho kuta, li ka ama haholo viscosity ea liaparo tsa metsi. Karolo ena e tla sekaseka phello ea mefuta ena ho viscosity ea liphahlo tse nang le HEC ho fana ka lintlha tse sebetsang bakeng sa baetsi ba lihlahisoa.
Likopo le litebello tsa nako e tlang:
5.1 Lisebelisoa tsa indasteri:
HEC e sebelisoa haholo lits'ebetsong tse fapaneng tsa indasteri joalo ka lipente, likhomaretsi le li-sealants. Karolo ena e tla totobatsa menehelo e khethehileng ea HEC ho li-coatings tse nang le metsi lits'ebetsong tsena le ho buisana ka melemo ea eona ho feta mefuta e meng e teteaneng.
5.2 Litaelo tsa lipatlisiso tsa kamoso:
Ha tlhoko ea liphahlo tse tšoarellang le tse sebetsang hantle haholo e ntse e hola, ho tla hlahlojoa tataiso ea liphuputso tsa nakong e tlang lebaleng la lifomello tse thehiloeng ho HEC. Sena se ka kenyelletsa mekhoa e mecha ea ntlafatso ea HEC, mekhoa e mecha ea ho qapa, le mekhoa e tsoetseng pele ea ho hlahisa batho.
ha re phethela:
Ha re akaretsa liphuputso tse ka sehloohong, karolo ena e tla totobatsa bohlokoa ba ho qhibiliha le ho laola li-viscosity ka liaparo tse nang le metsi a sebelisoang ke HEC. Sengoliloeng sena se tla phethela ka litlamorao tse sebetsang bakeng sa baetsi le likhothaletso bakeng sa lipatlisiso tse ling ho ntlafatsa kutloisiso ea HEC lits'ebetsong tsa metsi.
Nako ea poso: Dec-05-2023