1. Selelekela sa Hydroxyethyl Cellulose (HEC):
Hydroxyethylcellulose ke motsoako o qhibilihang ka metsing oa cellulose, polymer ea tlhaho e fumanehang maboteng a lisele tsa semela.Ho fetoloa ha selulose ka lihlopha tsa hydroxyethyl ho ntlafatsa ho qhibiliha ha eona metsing le ho fana ka thepa e khethehileng ho HEC, ho etsa hore HEC e be thepa ea bohlokoa mefuteng e fapaneng ea likopo.
2. Sebopeho sa HEC:
Sebopeho sa HEC se tsoa ho cellulose, polysaccharide e nang le linear e entsoeng ka ho pheta-pheta li-glucose tse kopantsoeng ke li-bond β-1,4-glycosidic.Lihlopha tsa Hydroxyethyl li kenngoa mokokotlong oa cellulose ka karabelo ea etherification.Degree of substitution (DS) e bolela palo e tloaelehileng ea lihlopha tsa hydroxyethyl ho yuniti ea tsoekere 'me e ama ho qhibiliha le viscosity ea HEC.
3. Litšobotsi tsa HEC:
A. Ho qhibiliha ha metsi: E 'ngoe ea lintho tse ka sehloohong tsa HEC ke ho qhibiliha ha metsi ho phahameng, e leng se hlahisoang ke hydroxyethyl substitution.Thepa ena e etsa hore ho be bonolo ho etsa tharollo le li-dispersions tse loketseng lits'ebetso tse fapaneng.
b.Bokhoni ba ho teteana: HEC e tsebahala haholo ka thepa ea eona e teteaneng methapong ea metsi.Ha e hasane ka metsing, e etsa gel e hlakileng le e hlakileng, e etsang hore e tšoanelehe bakeng sa lits'ebetso tse hlokang taolo ea viscosity.
C. pH Ho tsitsa: HEC e bonts'a botsitso holim'a mefuta e mengata ea pH, e etsang hore e lumellane le ho etsoa ha maemo a acidic le alkaline.
d.Ho tsitsa ha mocheso: Litharollo tsa HEC li lula li tsitsitse ho feta mocheso o pharaletseng.Ba ka etsa lipotoloho tse ngata tsa ho futhumatsa le ho pholisa ntle le liphetoho tse kholo ho viscosity kapa thepa e 'ngoe.
e.Sebopeho sa lifilimi: HEC e ka etsa lifilimi tse feto-fetohang le tse hlakileng tse loketseng lits'ebetso tse kang liphahlo, likhomaretsi le lifilimi.
F. Mosebetsi oa Bokaholimo: HEC e na le lisebelisoa tse kang surfactant, e leng molemo lits'ebetsong tse hlokang ho fetoloa kapa ho tsitsisa bokaholimo.
4.Mokhahlelo oa HEC:
Sebopeho sa HEC se kenyelletsa karabelo ea etherification ea selulose e nang le ethylene oxide ka pel'a motsoako oa alkaline.Boitšoaro bo ka laoloa ho finyella tekanyo e lakatsehang ea ho kenya sebaka, kahoo e ama thepa ea ho qetela ea sehlahisoa sa HEC.Hangata synthesis e etsoa tlas'a maemo a laoloang ho netefatsa hore sehlahisoa se lumellana le boleng.
5. Tšebeliso ea HEC:
A. Paints and Coatings: HEC e sebelisoa haholo e le motenya oa lipente le liphahlo tse entsoeng ka metsi.E ntlafatsa rheology, e matlafatsa brushability, 'me e kenya letsoho ho tsitsitseng ha sebopeho.
b.Lihlahisoa tsa tlhokomelo ea botho: HEC ke motsoako o tloaelehileng lihlahisoa tsa tlhokomelo ea botho tse kang li-shampoo, litlolo le litlolo.E sebetsa e le ntho e teteaneng, e tsitsitseng le e etsang lifilimi, e ntlafatsang ts'ebetso ea kakaretso ea lihlahisoa tsena.
C. Pharmaceutical: Lefapheng la meriana, HEC e sebelisoa ka mokhoa oa molomo le oa lihlooho.E ka sebetsa joalo ka setlamo, sa disintegrant, kapa matrix eo e kileng ea etsoa ka har'a matlapa, hape e le mofetoleli oa viscosity ho li-gel le litlolo.
d.Lisebelisoa tsa kaho: HEC e sebelisoa indastering ea kaho e le moemeli oa ho boloka metsi ka lihlahisoa tse thehiloeng ho samente.E ntlafatsa ts'ebetso ea kaho, e eketsa nako e bulehileng, 'me e ntlafatsa ho khomarela lithaelese le lirafshoa.
e.Indasteri ea Oli le Khase: HEC e sebelisoa indastering ea oli le khase e le ntho e matlafatsang bakeng sa maro a ho cheka.E thusa ho laola viscosity mme e fana ka thepa ea ho emisa ho thibela likaroloana ho lula.
F. Indasteri ea Lijo: HEC e sebelisoa indastering ea lijo e le motenya, stabilizer le moemeli oa gelling lihlahisoa tse fapa-fapaneng, ho akarelletsa le li-sauces, liaparo le li-dessert.
6. Maikutlo a taolo:
HEC ka kakaretso e amoheloa e le e bolokehileng (GRAS) ke mekhatlo ea taolo mme tšebeliso ea eona lits'ebetsong tse fapaneng e laoloa ho netefatsa polokeho ea bareki le katleho ea sehlahisoa.Bahlahisi ba tlameha ho ikamahanya le melawana ya lebatowa mme ba fumane ditumello tse hlokehang bakeng sa dikopo tse itseng.
7. Litloaelo le mekhoa ea kamoso:
Patlisiso e ntseng e tsoela pele e tsepamisitse maikutlo ho nts'etsopele ea lihlahisoa tse fetotsoeng tsa HEC tse nang le thepa e ntlafalitsoeng bakeng sa lits'ebetso tse ikhethileng.Ho boetse ho na le tjantjello e ntseng e eketseha mabapi le mekhoa e mecha ea ho fumana le ho hlahisa mekhoa e tsitsitseng ho rarolla mathata a tikoloho le ho khothaletsa mekhoa e meng e se nang tikoloho.
Hydroxyethylcellulose (HEC) ke polima e tenyetsehang, e tenyetsehang e nang le thepa e ikhethang joalo ka ho qhibiliha ha metsi, bokhoni ba ho tenya, le botsitso ba mocheso.Ho tloha ho lipente le liphahlo ho ea ho indasteri ea meriana le ea lijo, HEC e phetha karolo ea bohlokoa ho ntlafatsa ts'ebetso ea lihlahisoa tse fapaneng.Ha lipatlisiso le nts'etsopele li ntse li tsoela pele, HEC e ka 'na ea lula e le karolo ea bohlokoa liindastering tse fapa-fapaneng, ho kenya letsoho ntlafatsong ea thepa le libopeho.
Nako ea poso: Dec-29-2023