Hydroxyethyl Cellulose (HEC) ka Kaho: Tataiso e Feletseng

1. Selelekela sa Hydroxyethyl Cellulose (HEC)

Hydroxyethyl Cellulose(HEC) ke polymer e seng ea ionic, e qhibilihang ka metsi e tsoang ho cellulose, polysaccharide ea tlhaho e fumanoang marakong a lisele tsa semela. Ka phetoho ea lik'hemik'hale, lihlopha tsa hydroxyl ka selulose li nkeloa sebaka ke lihlopha tsa hydroxyethyl, tse matlafatsang ho qhibiliha ha eona le botsitso litharollong tse nang le metsi. Phetoho ena e etsa hore HEC e be tlatsetso e feto-fetohang ea thepa ea kaho, e fanang ka thepa e ikhethang joalo ka ho boloka metsi, botenya, le ts'ebetso e ntlafalitsoeng ea ts'ebetso.

1.1 Sebopeho sa Lik'hemik'hale le Tlhahiso

HECe entsoe ka ho phekola cellulose ka ethylene oxide tlas'a maemo a alkaline. The degree of substitution (DS), eo hangata e leng pakeng tsa 1.5 le 2.5, e lekanya palo ea lihlopha tsa hydroxyethyl ho yuniti ea tsoekere, e susumetsang ho qhibiliha le viscosity. Ts'ebetso ea tlhahiso e kenyelletsa alkalization, etherification, neutralization, le ho omisa, ho fella ka phofo e tšoeu kapa e tšoeu.

2. Thepa ea HEC e Amanang le Kaho

2.1 Poloko ea Metsi

HEC e etsa tharollo ea colloidal ka metsing, e etsa filimi e sireletsang ho pota-potile likaroloana. Sena se liehisa ho tsoa ha metsi mouoane, ho bohlokoa bakeng sa hydration ea samente le ho thibela ho omisoa pele ho nako liretseng le lipolasetereng.

2.2 Thickening le Viscosity Taolo

HEC e eketsa viscosity ea metsoako, e fana ka khanyetso ea sag lits'ebetsong tse otlolohileng joalo ka likhomaretsi tsa lithaele. Boitšoaro ba eona ba pseudoplastic bo tiisa ho sebelisoa ha bonolo tlas'a khatello ea ho kuta (mohlala, troweling).

2.3 Ho lumellana le botsitso

Joaloka polymer e seng ea ionic, HEC e lula e tsitsitse libakeng tse phahameng tsa pH (mohlala, mekhoa ea cementitious) 'me e mamella li-electrolyte, ho fapana le li-ionic thickeners tse kang Carboxymethyl Cellulose (CMC).

2.4 Thermal Stability

HEC e boloka ts'ebetso ho pholletsa le mefuta e mengata ea mocheso, e etsa hore e tšoanelehe bakeng sa lisebelisoa tsa ka ntle tse pepesehetseng maemo a leholimo a sa tšoaneng.

3. Likopo tsa HEC kahong

3.1 Likhomaretsi tsa Lithaele le Li-Grouts

HEC (0.2-0.5% ka boima ba 'mele) e eketsa nako e bulehileng, e lumella ho lokisoa ha tile ntle le ho sekisetsa ho khomarela. E matlafatsa matla a tlamahano ka ho fokotsa ho monya ha metsi ka har'a li-substrates tse porous.

3.2 Lifate tse Thehiloeng ka Samente le Lipehelo

Ho fana le ho lokisa liretse, HEC (0.1-0.3%) e ntlafatsa ts'ebetso, e fokotsa ho phunyeha, 'me e netefatsa phekolo e tšoanang. Ho boloka metsi ho bohlokoa bakeng sa ts'ebeliso ea libethe tse tšesaane.

3.3 Lihlahisoa tsa Gypsum

HEC (0.3-0.8%) ka li-plaster tsa gypsum le metsoako e kopanetsoeng e laola nako ea ho beha nako le ho fokotsa mapetsong a ho fokotseha. E ntlafatsa ho ata le ho qeta holimo.

3.4 Lipente le Likhabiso

Lipenteng tsa ka ntle, HEC e sebetsa e le mofetoleli o teteaneng le oa rheology, o thibela ho rotha le ho netefatsa hore ho na le tšireletso. E boetse e tsitsisa ho hasana ha pigment.

3.5 Metsoako ea ho Ikemela

HEC e fana ka taolo ea viscosity, e nolofalletsang mekato e ikemetseng ho phalla hantle ha e ntse e thibela ho senyeha ha likaroloana.

3.6 Mekhatlo ea Kantle ea Insulation le Finish Systems (EIFS)

HEC e ntlafatsa ho khomarela le ho tšoarella ha liaparo tsa motheo tse fetotsoeng ka polymer ho EIFS, ho hanyetsa boemo ba leholimo le khatello ea mochine.

4. Melemo eaHEC ka KahoLisebelisoa

• Mosebetsi:E nolofalletsa ho kopanya le ho sebetsa habonolo.
• Ho khomarela:E ntlafatsa matla a tlamahano ka likhomaretsi le liphahlo.
• Nako e telele:E fokotsa ho ruruha le ho ruruha.
• Sag Resistance:E bohlokoa bakeng sa lits'ebetso tse otlolohileng.
• Katleho ea Litšenyehelo:Tekanyo e tlase (0.1–1%) e fana ka ntlafatso e kholo ea ts'ebetso.

5. Papiso le Li-Ether tse ling tsa Cellulose

• Methyl Cellulose (MC):Ho se tsitse ha maemo a phahameng a pH; li-gel ka mocheso o phahameng.
• Carboxymethyl Cellulose (CMC):Ionic tlhaho e fokotsa ho lumellana le samente. Sebopeho sa HEC se seng sa ionic se fana ka ts'ebeliso e pharaletseng.

6. Maikutlo a Tekheniki

6.1 Tekanyetso le Ho Kopanya

Tekanyo e nepahetseng e fapana ho latela kopo (mohlala, 0.2% bakeng sa likhomaretsi tsa lithaele khahlano le 0.5% bakeng sa gypsum). Ho kopanya HEC esale pele ka lisebelisoa tse omeletseng ho thibela ho putlama. Motsoako o phahameng oa ho kuta o tiisa ho hasana ho tšoanang.

6.2 Lintlha tsa Tikoloho

• Mocheso:Metsi a batang a liehisa ho qhibiliha; metsi a futhumetseng (≤40 ° C) a e potlakisa.
• pH:E tsitsitse ho pH 2-12, e loketseng lisebelisoa tsa kaho tsa alkaline.

6.3 Polokelo

Boloka sebakeng se phodileng, se omeletseng ho thibela ho monya ha mongobo le ho baka.

7. Mathata le Mefokolo

• Litšenyehelo:E phahame ho feta MC empa e lokafatsoa ke ts'ebetso.
• Tšebeliso e Feteletseng:Viscosity e feteletseng e ka sitisa kopo.
• Ho lieha:E ka lieha ho seta haeba e sa leka-lekanngoa le li-accelerator.

8. Lithuto Tsa Litaba

• Ho Kenya Lithaele tse Phahameng ka ho Fetisisa:Likhomaretsi tse thehiloeng ho HEC li nolofalitse nako e telele e bulehileng bakeng sa basebetsi ba Burj Khalifa ea Dubai, ho netefatsa hore ba beoa ka nepo tlas'a mocheso o phahameng.
• Tsosoloso ea Nalane ea Moaho:Lirafshoa tse fetotsoeng tsa HEC li ile tsa boloka botšepehi ba meralo ea tsosoloso ea kereke ea Europe ka ho bapisa thepa ea histori.

9. Mekhoa ea Bokamoso le Litlhahiso

• Eco-Friendly HEC:Nts'etsopele ea limaraka tse ka senyehang ho tsoa mehloling e tsitsitseng ea cellulose.
• Hybrid Polymers:Ho kopanya HEC le li-polymers tsa maiketsetso bakeng sa khanyetso e matlafalitsoeng ea crack.
• Smart Rheology:HEC e arabelang mocheso bakeng sa viscosity e lumellanang le maemo a leholimo a feteletseng.

HEC's multifunctionality e etsa hore e be ea bohlokoa kahong ea sejoale-joale, ho leka-lekanya ts'ebetso, litšenyehelo, le botsitso. Ha boqapi bo ntse bo tsoela pele, HEC e tla bapala karolo ea bohlokoa ho ntlafatseng thepa ea kaho e tšoarellang, e sebetsang hantle.