Cellulose Ethers: Li-additives tsa bohlokoa bakeng sa Kaho

Li-cellulose ethers ke sehlopha sa li-polymers tse nkiloeng ho selulose, e leng motsoako o ngata ka ho fetisisa oa lintho tse phelang lefatšeng. Ka lebaka la thepa ea bona e feto-fetohang, e se e le litlatsetso tsa bohlokoa liindastering tse fapaneng, haholo tsa kaho. Mona ke tlhahlobo e tebileng ea hore na hobaneng li-cellulose ethers li le bohlokoa lekaleng la kaho:

1. Kakaretso ea Cellulose Ethers

Li-cellulose ethers li hlahisoa ka ho fetola lik'hemik'hale likhoele tsa tlhaho tsa cellulose (tse fumanoang ka lehong kapa k'hothone) ka mekhoa ea etherification. Phetoho ena e li etsa hore li qhibilihe ka metsing, e leng se li nolofalletsang ho etsa mesebetsi ea bohlokoa linthong tse fapaneng tsa kaho.

Mefuta e atileng haholo ea li-cellulose ethers tse sebelisoang kahong e kenyelletsa:

• Hydroxyethyl Cellulose (HEC)
• Hydroxypropyl Methylcellulose (HPMC)
• Methylcellulose (MC)
• Carboxymethyl Cellulose (CMC)

Mofuta o mong le o mong o na le thepa le lits'ebetso tse ikhethang, empa kaofela li phetha karolo ea bohlokoa ho ntlafatsa ts'ebetso ea thepa ea kaho.

2. Likarolo tsa Bohlokoa tsa Cellulose Ethers Kahong

Indastering ea kaho, li-cellulose ethers li kenngoa linthong tse kang lirekere tse entsoeng ka samente, likhomaretsi, lipolasetere le li-grouts. Mesebetsi ea bona ea bohlokoa e kenyelletsa:

A. Polokelo ea Metsi

O mong oa mesebetsi ea mantlha ea cellulose ethers ke ho boloka metsi ka har'a motsoako. Sena ke sa bohlokoa ka ho khetheha lihlahisoa tse entsoeng ka samente, tse kang seretse le samente, moo li laolang lebelo la ho fetoha ha metsi mouoane. Ho boloka metsi hantle ho tiisa hore samente e na le nako e lekaneng ea ho nosetsa, ho matlafatsa matla le ho tšoarella ha sehlahisoa sa ho qetela.

• Molemo: E fokotsa ho omella pele ho nako, ho thibela mapetsong, le ho ntlafatsa matla a bond.

B. Mokhoa o Ntlafetseng oa ho sebetsa

Li-cellulose ethers li sebetsa e le tse teteaneng, e leng se ntlafatsang ho sebetsa le ho tsitsisa ha seretse, sekhomaretsi sa lithaele le lipolasetere. Ho kenyelletsoa ha bona ho tiisa hore lisebelisoa li ka sebelisoa habonolo le ka mokhoa o ts'oanang, e leng tsa bohlokoa bakeng sa lisebelisoa tsa matsoho le tsa mochine.

• Molemo: Sesebelisoa se bonolo, sebopeho se boreleli, le bokhoni bo ntlafalitsoeng ba ho hasana.

C. Phetoho ea Rheology

Li-cellulose ethers li fetola thepa ea phallo (rheology) ea thepa ea kaho. Ba laola viscosity mme ba netefatsa hore motsoako o lula o momahane. Sena se bohlokoa haholo lits'ebetsong tse kang likhomaretsi tsa lithaele, moo ts'ebetso e sa sisinyeheng e leng bohlokoa bakeng sa libaka tse otlolohileng.

• Molemo: E thibela ho thella kapa ho thella lits'ebetsong tse otlolohileng joalo ka lithaele le mefuta.

D. Ho Kena ka Moea

Li-ether tse ling tsa cellulose li ka hlahisa le ho tsitsisa li-bubble tsa moea ka har'a matrix a thepa, tsa ntlafatsa thepa ea eona ea ho kenya letsoho le ho fokotsa sekhahla sa sehlahisoa se thata. Sena se ka ntlafatsa ts'ebetso ea mocheso le ho fetoha habonolo ha lihlahisoa tse kang li-plaster tse bobebe.

• Molemo: Ho ntlafala ha mocheso oa mocheso le lisebelisoa tsa ho haha ​​​​tse bobebe bo bobebe.

E. Ntlafatso ea ho khomarela

Cellulose ethers e ntlafatsa matla a sekhomaretsi a metsoako ea samente. Ka li-adhesives tsa lithaele, ka mohlala, li etsa bonnete ba ho khomarela hantle pakeng tsa tile le substrate, ho fokotsa menyetla ea ho thibela tile.

• Molemo: Ho matlafatsa likamano, ho thibela karohano ea lintho tse bonahalang kapa ho hlōleha.

3. Likopo ho Lisebelisoa tsa Kaho

Li-cellulose ethersli sebelisoa lihlahisoa tse fapaneng tsa kaho, mme mesebetsi ea tsona e ikhethileng e ka fapana ho latela mofuta oa thepa:

A. Likhomaretsi tsa Lithaele

• Karolo: Ntlafatsa mokhoa oa ho sebetsa, ho boloka metsi, le ho khomarela.
• Phello: Ntlafatsa nako e bulehileng, fokotsa ho thella, 'me u ntlafatse matla a ho qetela a tlamahano pakeng tsa lithaele le bokaholimo.

B. Samente Plaster le Renders

• Karolo: Ntlafatsa ho boloka metsi le ho sebetsa.
• Phello: E thibela ho petsoha ka lebaka la ho omisa pele ho nako, e lebisang pheletsong e boreleli le ho tšoarella hamolemo.

C. Metsoako ea Boiketlo

• Karolo: Ntlafatsa phallo le botsitso.
• Phello: E netefatsa ho ata ha thepa e ts'oanang, ho fana ka sebaka se bataletseng, se boreleli ntle le ho arohana kapa ho fokotseha.

D. Li-Mortars le Grouts

• Karolo: Ntlafatsa ho boloka metsi le viscosity.
• Phello: E thibela tahlehelo ea metsi nakong ea ho folisa, ho ntlafatsa matla a kakaretso le ho tšoarella ha nako e telele ha manonyeletso a seretse.

E. Lihlahisoa tse thehiloeng ho Gypsum

• Karolo: Ntlafatsa botsitso, ho sebetsa, le ho boloka metsi.
• Phello: E lumella ho sebelisoa ha plaster e entsoeng ka gypsum kapa metsoako ea li-drywall, ho fokotsa mapetsong le ho eketsa lebelo la kopo.

4. Melemo ea ho Sebelisa Cellulose Ethers

• Tshebetso e Ntlafetseng: Ntlafatsa litšobotsi tsa mochini tsa thepa ea kaho joalo ka matla, ho tenyetseha le ho khomarela.
• Litšenyehelo-Ka katleho: Li-cellulose ethers li ka fokotsa bongata ba metsi a hlokahalang le ho ntlafatsa katleho ea mekhoa ea kaho, e leng se lebisang ho bolokeng litšenyehelo.
• Ho lumellana le Boleng: Ba netefatsa ts'ebetso e ts'oanang ea sehlahisoa mme ba thusa ho fihlela pheletso e ts'oanang ho lits'ebetso tsohle.
• Tšusumetso ea Tikoloho: E tsoa mehloling e tsosolositsoeng (selulose), e kenya letsoho mekhoeng e tsitsitseng ea kaho.

Li-cellulose ethers li fetohile li-additives tsa bohlokoa indastering ea kaho ka lebaka la bokhoni ba tsona ba ho ntlafatsa ho boloka metsi, ho sebetsa le ho khomarela thepa e thehiloeng ho samente. Ho feto-fetoha ha bona le lintlafatso tsa ts'ebetso li li etsa hore e be tsa bohlokoa ho hlahiseng litene tsa boleng bo holimo, li-plaster, likhomaretsi le lihlahisoa tse ling tsa kaho. Ka tsoelo-pele e tsoelang pele ea saense ea lintho tse bonahalang, li-cellulose ethers li tsoela pele ho phetha karolo ea bohlokoa mekhoeng ea kajeno ea ho haha.

Kima Chemicalke moetsi ea khethehileng ka tlhahiso eali-cellulose ethersbakeng sa lits'ebetso tse fapaneng tsa indasteri, ho kenyeletsoa kaho, lipente, litlolo, litlhare, tlhokomelo ea motho, le tse ling. Mefuta ea tsona ea li-cellulose ethers e sebelisoa haholo thepa ea kaho ka lebaka la thepa e ikhethang eo metsoako ena e e tlisang, haholo-holo lihlahisoa tse entsoeng ka samente, lipente le liphahlo.