Tokisetso ea Hydroxyethyl Cellulose

Hydroxyethyl Cellulose (HEC) hangata e lokisoa ka mokhoa oa phetoho ea lik'hemik'hale o tsejoang e le etherification, moo lihlopha tsa hydroxyethyl li kenngoa mokokotlong oa cellulose.Mona ke kakaretso ea ts'ebetso ea ho lokisa:

1. Khetho ea Mohloli oa Cellulose:

• Cellulose, polymer ea tlhaho e fumanoang limela, e sebetsa e le ntho e qalang bakeng sa tlhahiso ea HEC.Mehloli e tloaelehileng ea selulose e kenyelletsa makhasi a lehong, lithara tsa k'hothone le lisebelisoa tse ling tsa limela tse nang le fiber.

2. Ts'ebetso ea Cellulose:

• Mohloli oa cellulose o kentsoe tšebetsong pele ho eketsa ts'ebetso ea ona hape le phihlello bakeng sa karabelo e latelang ea etherification.Mekhoa ea ts'ebetso e ka kenyelletsa phekolo ea alkaline kapa ho ruruha ka har'a motsoako o loketseng.

3. Karabelo ea Etherification:

• The cellulose activated e ntan'o ba tlas'a karabelo ea etherification ka ethylene oxide (EO) kapa ethylene chlorohydrin (ECH) ka pel'a li-catalysts tsa alkaline tse kang sodium hydroxide (NaOH) kapa potassium hydroxide (KOH).

4. Kenyelletso ea Lihlopha tsa Hydroxyethyl:

• Nakong ea karabelo ea etherification, lihlopha tsa hydroxyethyl (-CH2CH2OH) tse tsoang molek'hule ea ethylene oxide li kenngoa mokokotlong oa cellulose, ho nkela lihlopha tse ling tsa hydroxyl (-OH) tse teng molek'hule ea cellulose.

5. Taolo ea Maemo a Maikutlo:

• Maemo a karabelo, ho kenyelletsa mocheso, khatello, nako ea karabelo, le khatello ea maikutlo, li laoloa ka hloko ho fihlela tekanyo e lakatsehang ea ho kenya sebaka (DS) ea lihlopha tsa hydroxyethyl mokokotlong oa cellulose.

6. Ho Neutralization le Ho Hlatsoa:

• Kamora karabelo ea etherification, sehlahisoa se hlahisoang sa HEC ha se nke lehlakore ho tlosa catalyst e feteletseng le ho lokisa pH.E ntan'o hlatsuoa ka metsi ho tlosa lihlahisoa, li-reagents tse sa sebetsanoang le litšila.

7. Ho Hloekisa le ho Omisa:

• Sehlahisoa se hloekisitsoeng sa HEC hangata se tlhotliloeng, se entsoe ka centrifuged, kapa se omisitsoe ho tlosa mongobo o setseng le ho fumana boholo bo lakatsehang le sebopeho (phofo kapa granules).Ho ka sebelisoa mehato e meng ea tlhoekiso ha ho hlokahala.

8. Sebopeho le Taolo ea Boleng:

• Sehlahisoa sa ho qetela sa HEC se khetholloa ka ho sebelisa mekhoa e fapaneng ea ho hlahloba ho hlahloba thepa ea eona, ho kenyelletsa tekanyo ea ho fetola, viscosity, kabo ea boima ba limolek'hule le bohloeki.Mehato ea taolo ea boleng e kengoa ts'ebetsong ho netefatsa botsitso le tumellano le litlhaloso.

9. Ho paka le ho boloka:

• Sehlahisoa sa HEC se phuthetsoe ka lijaneng tse loketseng 'me se bolokiloe tlas'a maemo a laoloang ho thibela ho senyeha le ho boloka botsitso ba eona.Ho fanoa ka lileibole le litokomane ho thusa ho sebetsana, ho boloka le ho sebelisoa.

Ka kakaretso, ho lokisoa ha Hydroxyethyl Cellulose (HEC) ho kenyelletsa etherification ea selulose ka ethylene oxide kapa ethylene chlorohydrin tlas'a maemo a laoloang, e lateloa ke ho se nke lehlakore, ho hlatsoa, ​​ho hloekisa le ho omisa mehato.Sehlahisoa se hlahisoang ke HEC ke polima e qhibilihang ka metsing e nang le thepa e ikhethang le lits'ebetso tse fapaneng liindastering tse fapaneng.