ATataiso e Felletseng ea HEC (Hydroxyethyl Cellulose)

1. Selelekela sa Hydroxyethyl Cellulose (HEC)

Hydroxyethyl Cellulose(HEC) ke polymer e qhibilihang ka metsing, e seng ea ionic e tsoang ho cellulose, polysaccharide ea tlhaho e fumanoang marakong a lisele tsa semela. Ka phetoho ea lik'hemik'hale-ho nkela lihlopha tsa hydroxyl sebakeng sa selulose ka lihlopha tsa hydroxyethyl-HEC e fumana ho qhibiliha ho eketsehileng, botsitso le ho feto-fetoha ha maemo. E sebelisoa haholo indastering eohle, HEC e sebetsa e le tlatsetso ea bohlokoa ho tsa kaho, meriana, litlolo, lijo le liphahlo. Tataiso ena e hlahloba k'hemistri ea eona, thepa, lits'ebetso, melemo le mekhoa ea nako e tlang.

2. Sebopeho sa Lik'hemik'hale le Tlhahiso

2.1 Sebopeho sa Limolek'hule

Mokokotlo oa HEC o na le li-unit tsa D-glucose tse amanang le β-(1→4), tse nang le lihlopha tsa hydroxyethyl (-CH2CH2OH) tse nkang maemo a hydroxyl (-OH). Tekanyo ea ho kenya sebaka (DS), hangata 1.5-2.5, e lekanya ho qhibiliha le viscosity.

2.2 Mokhoa oa ho Kopanya

HECE hlahisoa ka karabelo ea alkali-catalyzed ea cellulose e nang le ethylene oxide:

1. Alkalization: Cellulose e phekoloa ka sodium hydroxide ho etsa alkali cellulose.
2. Etherification: E sebetsa ka ethylene oxide ho hlahisa lihlopha tsa hydroxyethyl.
3. Neutralization & Hloekiso: Asiti e fokotsa alkali e setseng; sehlahisoa se hlatsuoa ebe se omisoa ka phofo e ntle.

3. Lintho tsa Bohlokoa tsa HEC

3.1 Ho qhibiliha ha Metsi

• E qhibiliha ka metsing a chesang kapa a batang, a etsa litharollo tse hlakileng, tse hlakileng.
• Tlhaho e seng ea ionic e tiisa ho lumellana le electrolyte le pH botsitso (2-12).

3.2 Thickening & Rheology Control

• E sebetsa joalo ka pseudoplastic thickener: Viscosity e phahameng ha u phomola, ho fokotseha ha viscosity tlas'a ho kuta (mohlala, ho pompa, ho hasana).
• E fana ka khanyetso ea sag lits'ebetsong tse otlolohileng (mohlala, likhomaretsi tsa lithaele).

3.3 Paballo ea Metsi

• E etsa filimi ea colloidal, e fokotsang mouoane oa metsi ka har'a sisteme ea cementitious bakeng sa hydration e nepahetseng.

3.4 Thermal Stability

• E boloka viscosity ho pholletsa le mocheso (-20°C ho ea ho 80°C), e loketse lirafshoa le likhomaretsi tsa bokantle.

3.5 Ho Etsa Lifilimi

• E etsa lifilimi tse tenyetsehang, tse tšoarellang ka lipente le litlolo.

4. Likopo tsa HEC

4.1 Indasteri ea Kaho

• Li-Tile Adhesives & Grouts: E ntlafatsa nako e bulehileng, ho khomarela, le ho hanyetsa sag (0.2-0.5% tekanyo).
• Li-Cement Mortars & Plasters: Ho ntlafatsa ts'ebetso le ho fokotsa ho phunyeha (0.1-0.3%).
• Lihlahisoa tsa Gypsum: Ho laola ho beha nako le ho fokotseha ha metsoako e kopanetsoeng (0.3-0.8%).
• Lisebelisoa tsa Kantle tsa Insulation (EIFS): E matlafatsa nako e telele ea liphahlo tse fetotsoeng ka polymer.

4.2 Meriana ea meriana

• Letlapa Binder: E matlafatsa ho kopana le ho qhibiliha ha lithethefatsi.
• Tharollo ea Ophthalmic: E tlotsa le ho tenya marotholi a mahlo.
• Litlhahiso tse Laoloang-Tlhaloso: E fetola litekanyetso tsa ho lokolloa ha lithethefatsi.

4.3 Litlolo le Tlhokomelo ea Motho

• Shampoos & Lotions: E fana ka viscosity le ho tsitsisa emulsions.
• Creams: E ntlafatsa ho ata le ho boloka mongobo.

4.4 Indasteri ea Lijo

• Thickener & Stabilizer: E sebelisoa ka li-sauces, lihlahisoa tsa lebese, le lintho tse besitsoeng tse se nang gluten.
• Fat Substitute: E etsisa sebopeho sa lijo tse nang le khalori e tlase.

4.5 Lipente le Liaparo

• Rheology Modifier: E thibela ho rotha ka lipente tse thehiloeng metsing.
• Pigment Suspension: E tsitsisa likaroloana bakeng sa kabo e lekanang ea mebala.

4.6 Lisebelisoa tse ling

• Mekelikeli ea ho Cheka Oli: E laola tahlehelo ea mokelikeli seretseng se chekang.
• Li-Inks tsa Khatiso: E fetola viscosity bakeng sa khatiso ea skrine.

5. Melemo ea HEC

• Multifunctionality: E kopanya botenya, ho boloka metsi, le ho etsa filimi ka kenyelletso e le 'ngoe.
• Katleho ea Litšenyehelo: Tekanyo e tlase (0.1-2%) e fana ka ntlafatso e kholo ea ts'ebetso.
• Eco-Friendly: Biodegradable le e nkiloeng ho selulose e nchafalitsoeng.
• Tšebelisano: E sebetsa ka letsoai, li-surfactants le li-polymers.

6. Maikutlo a Tekheniki

6.1 Litaelo tsa litekanyetso

• Kaho: 0.1-0.8% ka boima ba 'mele.
• Litlolo: 0.5-2%.
• Meriana ea meriana: 1-5% ka matlapa.

6.2 Ho kopanya le ho qhala

• Kopanya pele le li-powders tse omeletseng ho thibela ho bokellana.
• Sebelisa metsi a futhumetseng (≤40 ° C) bakeng sa ho qhibiliha ka potlako.

6.3 Polokelo

• Boloka ka lijaneng tse tiisitsoeng ka mocheso oa <30°C le mongobo o ka tlase ho 70%.

7. Mathata le Mefokolo

• Litšenyehelo: theko e phahameng ho fetamethylcellulose(MC) empa e lokafatsoa ke ts'ebetso e phahameng.
• Ho tenya ka ho Feta: HEC e feteletseng e ka sitisa kopo kapa ho omisa.
• Setting Retardation: Ka samente, e ka hloka li-accelerator (mohlala, calcium formate).

8. Lithuto Tsa Litaba

1. Li-Adhesives tsa Lithaele tse sebetsang ka ho Fetisisa: Likhomaretsi tse thehiloeng ho HEC Burj Khalifa ea Dubai li mamella mocheso oa 50 ° C, e leng se nolofalletsang ho behoa ha lithaele hantle.
2. Eco-Friendly Paints: Letšoao la Europe le sebelisitse HEC ho nka sebaka sa li-thickeners tsa maiketsetso, ho fokotsa tlhahiso ea VOC ka 30%.

9. Mekhoa ea Bokamoso

• Green HEC: Ho hlahisoa ka matlakala a temo a sebelisitsoeng hape (mohlala, likhapetla tsa raese).
• Smart Materials: HEC e arabelang mocheso / pH bakeng sa phepelo ea lithethefatsi e ikamahanyang le maemo.
• Nanocomposites: HEC e kopantsoe le li-nanomaterials bakeng sa lisebelisoa tse matla tsa kaho.

Motsoako o ikhethang oa HEC oa ho solubility, botsitso, le ho feto-fetoha ha maemo ho etsa hore e be ea bohlokoa haholo indastering. Ho tloha ho li-adhesives tsa skyscraper ho ea meriana e pholosang bophelo, e koala ts'ebetso le ts'ebetso e tsitsitseng. Ha lipatlisiso li ntse li tsoela pele,HECe tla tsoela pele ho susumetsa boqapi ba mahlale a lintho tse bonahalang, e tiisa karolo ea eona e le setsi sa indasteri sa lekholong la bo21 la lilemo.

TDS KimaCell HEC HS100000