ATataiso e Felletseng ea HEC (Hydroxyethyl Cellulose)

1. Selelekela ho Hydroxyethyl Cellulose (HEC)

Selulose ea Hydroxyethyl(HEC) ke polymer e qhibilihang metsing, e seng ionic e nkiloeng ho cellulose, polysaccharide ea tlhaho e fumanoang maboteng a sele ea limela. Ka phetoho ea lik'hemik'hale—ho nkela lihlopha tsa hydroxyl sebaka ka lihlopha tsa hydroxyethyl ho cellulose—HEC e fumana ho qhibiliha ho eketsehileng, botsitso le ho tenyetseha. Ha e sebelisoa haholo liindastering tsohle, HEC e sebetsa e le tlatsetso ea bohlokoa kahong, meriana, litlolo, lijo le lipente. Tataiso ena e hlahloba k'hemistri ea eona, thepa, lits'ebetso, melemo le mekhoa ea nakong 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 glucose tse kopantsoeng ke β-(1→4), tse nang le lihlopha tsa hydroxyethyl (-CH2CH2OH) tse nkang sebaka sa maemo a hydroxyl (-OH). Tekanyo ea phetolo (DS), hangata e leng 1.5–2.5, e khetholla ho qhibiliha le ho teteana.

2.2 Ts'ebetso ea ho Kopanya

HECe hlahisoa ka karabelo ea alkali-catalyzed ea cellulose ka ethylene oxide:

1. Alkalization: Cellulose e phekoloa ka sodium hydroxide ho etsa alkali cellulose.
2. Etherification: E arajoa le ethylene oxide ho hlahisa lihlopha tsa hydroxyethyl.
3. Ho se be le lehlohlo le tlhoekiso: Asiti e thibela alkali e setseng; sehlahisoa se hlatsuoa ebe se omisoa hore e be phofo e ntle.

3. Matlotlo a Bohlokoa a HEC

3.1 Ho qhibiliha ha Metsi

• E qhibiliha ka metsing a chesang kapa a batang, e etsa ditharollo tse hlakileng, tse tiileng.
• Tlhaho e seng ea ionic e netefatsa hore e lumellana le li-electrolyte le botsitso ba pH (2–12).

3.2 Taolo ea ho Tetefala le Rheology

• E sebetsa e le setenya sa polasetiki: Ho ba le ho teteana ho hoholo ha e phomotse, ho fokotseha ha ho teteana ha e tjheswa (mohlala, ho pompa, ho hasana).
• E fana ka khanyetso ea ho oa lits'ebetsong tse otlolohileng (mohlala, likhomaretsi tsa thaele).

3.3 Ho Boloka Metsi

• E etsa filimi ea colloidal, e liehisang mouoane oa metsi lits'ebetsong tse etsang samente bakeng sa ho nosetsa hantle.

3.4 Ho Tsitsisa Thermal

• E boloka viscosity ho pholletsa le mocheso (-20°C ho isa ho 80°C), e loketse ho maneha ka ntle le likhomaretsi.

3.5 Ho Etsa Lifilimi

• E etsa lifilimi tse tenyetsehang le tse tšoarellang ka pente le litlolo.

4. Litšebeliso tsa HEC

4.1 Indasteri ea Kaho

• Likhomaretsi tsa Lithaele le Li-Grout: E ntlafatsa nako ea ho buleha, ho khomarela le ho hanyetsa ho oa (tekanyo ea 0.2–0.5%).
• Li-mortar tsa samente le li-plaster: Li ntlafatsa ho sebetsa hantle le ho fokotsa ho petsoha (0.1–0.3%).
• Lihlahisoa tsa Gypsum: E laola ho beha nako le ho fokotseha ha metsoako ea manonyeletso (0.3–0.8%).
• Mekhoa ea ho Thibela ho Sireletsa ka Ntle (EIFS): E eketsa ho tšoarella ha lipekere tse fetotsoeng ke polymer.

4.2 Meriana

• Letlapa la ho kopanya: E ntlafatsa ho hatelloa le ho qhalana ha meriana.
• Litharollo tsa Mahlo: E tlotsa marotholi a mahlo le ho a tebisa.
• Mekhoa ea ho Lokolla e Laoloang: E ​​fetola sekhahla sa ho lokolloa ha lithethefatsi.

4.3 Litlolo le Tlhokomelo ea Motho ka Mong

• Li-shampoo le Litlolo: E fana ka ho hlaka le ho tsitsisa li-emulsion.
• Li-cream: Li ntlafatsa ho ata le ho boloka mongobo.

4.4 Indasteri ea Lijo

• Sekoekoe le Sehatsetsi: Se sebelisoa ka har'a lisoso, lihlahisoa tsa lebese, le lijong tse besitsoeng tse se nang gluten.
• Sebaka sa Mafura: E etsisa sebopeho lijong tse nang le lik'hilojule tse tlase.

4.5 Pente le Lipente

• Mochini oa Rheology: O thibela marotholi a penteng e thehiloeng metsing.
• Ho emisoa ha 'mala: Ho tsitsisa likaroloana bakeng sa kabo e lekanang ea 'mala.

4.6 Litšebeliso tse ling

• Metsi a ho Cheka Oli: E laola tahlehelo ea mokelikeli seretseng sa ho cheka.
• Enke ea ho Hatisa: E lokisa ho hlaka ha ho hatisoa skrineng.

5. Melemo ea HEC

• Mesebetsi e mengata: E kopanya ho teteana, ho boloka metsi le ho etsa filimi ka har'a sesebelisoa se le seng.
• Ho Boloka ha Litšenyehelo: Tekanyo e tlase (0.1–2%) e tlisa lintlafatso tse kholo tsa ts'ebetso.
• E Sireletsa Tikoloho: E bola 'me e nkiloe ho cellulose e nchafatsoang.
• Ho lumellana: E sebetsa le letsoai, li-surfactant le li-polymer.

6. Mehopolo ea Tekheniki

6.1 Tataiso ea Tekanyo

• Kaho: 0.1–0.8% ka boima.
• Litlolo: 0.5–2%.
• Meriana: 1–5% matlapeng.

6.2 Ho Kopanya le ho Qhibiliha

• Kopanya le phofo e omileng esale pele ho thibela ho kopana ha mahlaka.
• Sebelisa metsi a futhumetseng (≤40°C) bakeng sa ho qhibiliha kapele.

6.3 Polokelo

• Boloka ka har'a lijana tse koetsoeng tse ka tlase ho 30°C le mongobo o ka tlase ho 70%.

7. Liphephetso le Meeli

• Theko: E theko e boima ho fetamethylcellulose(MC) empa e lokafalitsoe ke ts'ebetso e phahameng.
• Ho Tetefala ho Feta Tekanyo: HEC e feteletseng e ka sitisa ho sebediswa kapa ho omiswa.
• Ho Siea Nako: Ka samente, ho ka hlokahala li-accelerator (mohlala, calcium formate).

8. Lithuto tsa Nyeoe

1. Likhomaretsi tsa Lithaele tse Sebetsang ka Botlalo: Likhomaretsi tse thehiloeng ho HEC tse Burj Khalifa ea Dubai li ile tsa mamella mocheso oa 50°C, tsa nolofalletsa ho beoa ha lithaele ka nepo.
2. Pente e Sireletsang Tikoloho: Letšoao la Europe le sebelisitse HEC ho nkela li-thickeners tsa maiketsetso sebaka, e leng se fokotsang tlhahiso ea VOC ka 30%.

9. Mekhoa ea Nakong e Tlang

• HEC e Tala: Tlhahiso e tswang ditshileng tsa temo tse sebedisitsweng hape (mohlala, dikhaketla tsa raese).
• Lisebelisoa tse Bohlale: HEC e arabelang mocheso/pH bakeng sa ho fana ka meriana e ikamahanyang le maemo.
• Li-Nanocomposite: HEC e kopantsoeng le li-nanomaterial bakeng sa thepa ea kaho e matla.

Motsoako o ikhethang oa HEC oa ho qhibiliha, botsitso le ho tenyetseha o etsa hore e be ea bohlokoa ho pholletsa le liindasteri. Ho tloha ho likhomaretsi tse telele ho ea ho meriana e pholosang bophelo, e kopanya ts'ebetso le botsitso. Ha lipatlisiso li ntse li tsoela pele,HECe tla tswela pele ho kganna boiqapelo saenseng ya dintho tse bonahalang, e tiisa karolo ya yona e le motheo wa indasteri wa lekgolo la bo21 la dilemo.

TDS KimaCell HEC HS100000