Tsebo ka cellulose ether

Cellulose ether (CelluloseEther) e entsoe ka selulose ka karabelo ea etherification ea e 'ngoe kapa tse' maloa tsa etherification le ho sila ho omileng. Ho ea ka likarolo tse fapaneng tsa lik'hemik'hale tsa li-substituents tsa ether, cellulose ethers e ka aroloa ka li-anionic, cationic le nonionic ethers. Ionic cellulose ethers haholo-holo e kenyelletsa carboxymethyl cellulose (CMC); li-non-ionic cellulose ethers haholo-holo li kenyelletsa methyl cellulose ether (MC), hydroxypropyl methyl cellulose ether (HPMC) le hydroxyethyl cellulose Ether (HC), joalo-joalo. Li-ethers tse qhibilihang ka metsi tsa ionic li sebelisoa haholo-holo lihlahisoa tsa seretse. Ka pel'a li-ion tsa calcium, ionic cellulose ether ha e tsitsa, kahoo ha e sebelisoe hangata lihlahisoa tsa seretse tse omeletseng tse sebelisang samente, slaked lime, joalo-joalo e le lisebelisoa tsa samente. Nonionic water-soluble cellulose ethers li sebelisoa haholo indastering ea thepa ea mohaho ka lebaka la botsitso ba tsona ba ho emisa le ho boloka metsi.

01. Lintho tsa lik'hemik'hale tsa cellulose ether

Ether e 'ngoe le e' ngoe ea cellulose e na le sebopeho sa motheo sa cellulose - sebopeho sa anhydroglucose. Nakong ea ho hlahisa ether ea cellulose, fiber ea cellulose e qala ho futhumatsoa ka tharollo ea alkaline, ebe e phekoloa ka etherifying agent. Sehlahisoa sa karabelo ea fibrous se hloekisoa le ho siloa ho etsa phofo e ts'oanang e nang le botle bo itseng.

Propylene oxide e sebelisoa ho fumana li-substituents tsa hydroxypropyl ho phaella ho methane chloride tlhahisong ea HPMC. Li-ether tse fapaneng tsa cellulose li na le likarolo tse fapaneng tsa methyl le hydroxypropyl substitution ratios, tse amang tšebelisano ea lintho tse phelang le mocheso oa mocheso oa mocheso oa litharollo tsa cellulose ether.

Ts'ebetsong ea tlhahiso ea MC, ke methyl chloride feela e sebelisoang e le moemeli oa etherification

02. Maemo a ts'ebeliso ea cellulose ether:

Cellulose ether ke polymer e phahameng ea molek'hule e seng ionic semi-synthetic, e qhibilihang ka metsing ebile e qhibiliha. E na le litlamorao tse fapaneng liindastering tse fapaneng. Mohlala, ka thepa ea kaho ea lik'hemik'hale, e na le litlamorao tse latelang tse kopaneng:

①Setsi sa ho boloka metsi ②Thickener ③Leveling thepa ④Thepa ea ho etsa filimi ⑤Binder

Ka indasteri ea polyvinyl chloride, ke emulsifier le dispersant; indastering ea meriana, ke setlamo le lisebelisoa tsa moralo o liehang le o laoloang, joalo-joalo Hobane selulose e na le liphello tse sa tšoaneng tse kopantsoeng, ts'ebeliso ea eona Tšimo e boetse e pharaletseng ka ho fetisisa. Lintlha tse latelang li shebane le ts'ebeliso le ts'ebetso ea cellulose ether linthong tse fapaneng tsa moaho.

(1) Ka leboteng la scraping putty:

Hona joale, metseng e mengata ea naha ea heso, putty e thibelang metsi le e thibelang ho senya tikoloho e se e nkoa e le ea bohlokoa ke batho. E hlahisoa ke karabelo ea acetal ea joala ba vinyl le formaldehyde. Ka hona, boitsebiso bona bo tlosoa butle-butle ke batho, 'me lihlahisoa tsa letoto la cellulose ether li sebelisoa ho nkela thepa ena sebaka. Ka mantsoe a mang, bakeng sa nts'etsopele ea lisebelisoa tsa mohaho tse nang le tikoloho, cellulose hona joale ke eona feela thepa.

Ka putty e thibelang metsi, e arotsoe ka mefuta e 'meli: putty e ommeng le putty paste. Har'a mefuta ena e 'meli ea putty, methyl cellulose e fetotsoeng le hydroxypropyl methyl e lokela ho khethoa. Tlhaloso ea viscosity hangata e pakeng tsa 30000-60000cps. Mesebetsi e ka sehloohong ea selulose ka putty ke ho boloka metsi, tlamahano le lubrication. Kaha liforomo tsa putty tsa bahlahisi ba fapaneng li fapane, tse ling ke khalsiamo e bohlooho, khalsiamo e bobebe, samente e tšoeu, joalo-joalo, 'me tse ling ke phofo ea gypsum, calcium e bohlooho, khalsiamo e khanyang, joalo-joalo, kahoo litlhaloso, viscosity le ho kenella ha selulose liforomo tse peli le tsona li fapane. Chelete e ekelitsoeng e ka ba 2 ‰-3 ‰. Ha ho hahoa putty ea lebota, kaha bokaholimo ba lebota bo na le tekanyo e itseng ea ho monya metsi (sekhahla sa ho monya metsi ha lerako la litene ke 13%, 'me sekhahla sa ho monya metsi sa konkreite ke 3-5%), hammoho le mouoane oa lefats'e le ka ntle, haeba putty e lahleheloa ke metsi ka potlako , E tla lebisa ho mapetsong kapa ho tlosoa ha phofo, e leng ho tla fokolisa matla a putty. Ka hona, ho eketsa cellulose ether ho tla rarolla bothata bona. Empa boleng ba ho tlatsa, haholo-holo boleng ba molora oa calcium le bona bo bohlokoa haholo.

Ka lebaka la viscosity e phahameng ea selulose, bonyatsi ba putty le bona boa ntlafatsoa, ​​​​'me ts'ebetso e sisinyehang nakong ea kaho e boetse e qojoa,' me e phutholohile ebile e boloka mosebetsi ka mor'a ho phunya. Hoa hlokahala ho eketsa ether ea cellulose ho putty ea phofo. Tlhahiso le tšebeliso ea eona li bonolo haholoanyane. Li-filler le li-additives li ka kopanngoa ka ho lekana ka phofo e omileng.

(2) Seretse sa konkreite:

Ka seretse sa konkreite, ho fihlela matla a ho qetela, samente e tlameha ho ba le metsi ka botlalo. Haholo-holo kahong ea lehlabula, seretse sa konkreite se lahleheloa ke metsi ka potlako, 'me litekanyo tsa hydration e feletseng li sebelisetsoa ho boloka le ho fafatsa metsi. Ho senyeha ha lisebelisoa le ts'ebetso e sa thabiseng, ntho ea bohlokoa ke hore metsi a ka holim'a metsi feela, 'me metsi a ka hare a ntse a sa fella, kahoo tharollo ea bothata bona ke ho eketsa selulose e bolokang metsi ho konkreite ea seretse, ka kakaretso khetha hydroxypropyl methyl. kapa methyl fiber Tlhaloso ea viscosity e pakeng tsa 20000-60000cps, 'me chelete ea tlatsetso ke 2% -3%. Sekhahla sa ho boloka metsi se ka eketsoa ho feta 85%. Mokhoa oa ho sebelisoa ka konkreite ea seretse ke ho kopanya phofo e omeletseng le ho e kenya ka metsing.

(3) Ho rala gypsum, gypsum e tlanngoeng, le gypsum ea caulking:

Ka tsoelo-pele e potlakileng ea indasteri ea kaho, tlhokahalo ea batho ea thepa e ncha ea mohaho le eona e ntse e eketseha. Ka lebaka la keketseho ea tlhokomeliso ea batho mabapi le ts'ireletso ea tikoloho le ntlafatso e tsoelang pele ea katleho ea kaho, lihlahisoa tsa gypsum tsa samente li tsoetse pele ka potlako. Hajoale, lihlahisoa tse atileng haholo tsa gypsum ke gypsum ea ho pola, gypsum e tlanngoeng, gypsum e kentsoeng, le sekhomaretsi sa lithaele. Plastering gypsum ke thepa ea boleng bo holimo ea ho lipola mabota le siling. Lerako le manehiloeng ka eona le ntle ebile le boreleli. Mofuta o mocha oa sekhomaretsi sa boto ea leseli ke thepa e khomarelang e entsoeng ka gypsum e le lisebelisoa tsa motheo le ho eketsa li-additives tse fapaneng. E loketse ho kopanya pakeng tsa lisebelisoa tse sa tšoaneng tsa lerako la mohaho. Ha e chefo, ha e latsoehe, ebile ha e na maemo a potlakileng. Ke thepa e tšehetsang bakeng sa mapolanka a mohaho le mohaho oa li-block; gypsum caulking agent ke ho tlatsa lekhalo pakeng tsa liboto tsa gypsum le ho lokisa marako le mapetsong.

Lihlahisoa tsena tsa gypsum li na le letoto la mesebetsi e fapaneng. Ntle le karolo ea gypsum le li-fillers tse amanang le tsona, taba ea bohlokoa ke hore li-additives tse ekelitsoeng tsa cellulose ether li bapala karolo e ka sehloohong. Kaha gypsum e arotsoe ka gypsum ea anhydrous le gypsum ea hemihydrate, gypsum e fapaneng e na le liphello tse sa tšoaneng mosebetsing oa sehlahisoa, kahoo ho teteana, ho boloka metsi le ho lieha ho etsa qeto ea boleng ba thepa ea mohaho oa gypsum. Bothata bo tloaelehileng ba lisebelisoa tsena ke ho koala le ho phunyeha, 'me matla a pele a ke ke a finyelloa. Ho rarolla bothata bona, ke ho khetha mofuta oa selulose le mokhoa oa tšebeliso ea motsoako oa retarder. Tabeng ena, methyl kapa hydroxypropyl methyl 30000 hangata e khethoa. -60000cps, chelete ea tlatsetso ke 1.5% -2%. Har'a tsona, selulose e shebana le ho boloka metsi le ho chechisa lubrication. Leha ho le joalo, ho ke ke ha khoneha ho itšetleha ka cellulose ether e le retarder, 'me hoa hlokahala ho eketsa retarder ea citric acid ho kopanya le ho sebelisa ntle le ho ama matla a pele.

Ho boloka metsi ka kakaretso ho bolela hore na metsi a tla lahleha hakae ka tlhaho ntle le ho monngoa ha metsi ka ntle. Haeba lerako le omme haholo, ho kenngoa ha metsi le mouoane oa tlhaho holim'a metsi ho tla etsa hore thepa e lahleheloe ke metsi ka potlako, 'me ho tla ba le sekoti le ho phunyeha. Mokhoa ona oa tšebeliso o kopantsoe le phofo e omileng. Haeba u lokisetsa tharollo, ka kopo sheba mokhoa oa ho lokisetsa tharollo.

(4) Seretse se sireletsang mocheso

Seretse sa insulation ke mofuta o mocha oa thepa ea ka hare ea lebota sebakeng se ka leboea. Ke thepa ea lebota e entsoeng ka thepa ea ho kenya letsoho, seretse le binder. Tabeng ena, cellulose e phetha karolo ea bohlokoa ho tlamahaneng le ho eketsa matla. Ka kakaretso khetha methyl cellulose e nang le viscosity e phahameng (hoo e ka bang 10000cps), tekanyo e tloaelehileng e pakeng tsa 2 ‰ -3 ‰), 'me mokhoa oa ho sebelisa ke ho kopanya phofo e omileng.

(5) moemeli oa sebopeho

Khetha HPNC 20000cps bakeng sa moemeli oa sebopeho, khetha 60000cps kapa ho feta bakeng sa sekhomaretsi sa lithaele, 'me u tsepamise maikutlo ho sekontiri se seholo sa sehokelo, se ka ntlafatsang matla a thata le matla a ho thibela motsu. E sebelisoa e le ntho e bolokang metsi ka har'a tlamahano ea lithaele ho thibela lithaele ho tsoa metsi ka potlako le ho oa.