Phapang lipakeng tsa HEC le EC

HEC le EC ke mefuta e 'meli ea li-cellulose ethers tse nang le thepa le lits'ebetso tse fapaneng.HEC e emetse hydroxyethyl cellulose, ha EC e emetse ethyl cellulose.Sehloohong sena, re tla tšohla phapang pakeng tsa HEC le EC mabapi le sebopeho sa lik'hemik'hale, thepa, tšebeliso le polokeho.

1. Sebopeho sa Lik'hemik'hale

HEC le EC li na le likarolo tse fapaneng tsa lik'hemik'hale tse li fang thepa e fapaneng.HEC ke polima e qhibilihang ka metsing e tsoang ho selulose.Ke ether ea cellulose e fetotsoeng e nang le lihlopha tsa hydroxyethyl tse khomaretsoeng mokokotlong oa cellulose.The degree of substitution (DS) ea HEC e bolela palo ea lihlopha tsa hydroxyethyl tse teng ka unit ea anhydroglucose (AGU) ea mokokotlo oa selulose.DS ea HEC e ka tloha ho 0.1 ho ea ho 3.0, ka litekanyetso tse phahameng tsa DS tse bontšang tekanyo e phahameng ea ho fetola.

EC, ka lehlakoreng le leng, ke polima e sa keneng ka metsi e tsoang hape ho selulose.Ke ether ea cellulose e fetotsoeng e nang le lihlopha tsa ethyl tse khomaretsoeng mokokotlong oa cellulose.DS ea EC e bolela palo ea lihlopha tsa ethyl tse teng ka AGU ea mokokotlo oa cellulose.DS ea EC e ka tloha ho 1.7 ho ea ho 2.9, ka litekanyetso tse phahameng tsa DS tse bontšang tekanyo e phahameng ea ho fetola.

2. Thepa

HEC le EC li na le thepa e fapaneng e etsang hore e tšoanelehe bakeng sa lits'ebetso tse fapaneng.Tse ling tsa thepa ea bohlokoa ea HEC le EC li thathamisitsoe ka tlase:

a.Sollubility: HEC e qhibiliha haholo metsing, ha EC e sa qhibilihe ka metsing.Leha ho le joalo, EC e ka qhibiliha ka har'a metsoako ea lintho tse hlapollang tse kang ethanol, acetone, le chloroform.

b.Rheology: HEC ke thepa ea pseudoplastic, e bolelang hore e bontša boitšoaro ba ho kuta.Sena se bolela hore viscosity ea HEC e fokotseha ha sekhahla sa ho kuta se ntse se eketseha.Ka lehlakoreng le leng, EC ke thepa ea thermoplastic, e bolelang hore e ka nolofatsoa le ho bōptjoa ha e futhumala.

c.Lintho tsa ho etsa lifilimi: HEC e na le thepa e ntle ea ho etsa lifilimi, e etsang hore e tšoanelehe ho sebelisoa liphahlo le lifilimi.EC e boetse e na le thepa ea ho etsa lifilimi, empa lifilimi li ka 'na tsa e-ba brittle le tse atisang ho phunyeha.

d.Botsitso: HEC e tsitsitse ho feta mefuta e mengata ea pH le maemo a mocheso.EC e boetse e tsitsitse ho feta mefuta e mengata ea pH, empa botsitso ba eona bo ka angoa ke mocheso o phahameng.

3. Lisebelisoa

HEC le EC li sebelisoa mefuteng e mengata ea likopo indastering ea lijo, ea meriana le ea tlhokomelo ea botho.Tse ling tsa ts'ebeliso ea bohlokoa ea HEC le EC li thathamisitsoe ka tlase:

a.Indasteri ea lijo: HEC e atisa ho sebelisoa e le ntho e teteaneng, e tsitsitseng, le emulsifier lihlahisoa tsa lijo tse kang li-sauces, li-dressings le lintho tse halikiloeng.EC e sebelisoa e le ntho ea ho roala lihlahisoa tsa lijo tse kang chewing gum, confectionery le lipilisi.

b.Indasteri ea meriana: HEC e sebelisoa e le se tlamellang, se senyang, le ho roala letlapa ha ho etsoa meriana.EC e sebelisoa e le se tlamang, se koahelang, le ntho e sa khaotseng ea tokollo mefuteng ea meriana.

4. Polokeho

HEC le EC ka kakaretso li nkuoa li bolokehile hore li ka sebelisoa lijong le lits'ebetsong tsa meriana.Leha ho le joalo, joalo ka ntho leha e le efe ea lik'hemik'hale, ho ka 'na ha e-ba le likotsi tse amanang le tšebeliso ea tsona.Ke habohlokoa ho latela litataiso tse khothaletsoang bakeng sa tšebeliso ea HEC le EC ho netefatsa tšebeliso ea tsona e sireletsehileng le e sebetsang.