N'ihe mejupụtara ngwa ngwa ntụ ntụ akọrọ,cellulose etherbụ ihe mgbakwunye dị mkpa nke nwere obere mgbakwunye dịtụ ala, mana ọ nwere ike imeziwanye ngwakọta na ịrụ ọrụ nke ngwa agha. N'ikwu ya n'ụzọ dị mfe, ihe fọrọ nke nta ka ọ bụrụ ihe niile na-agwakọta mmiri mmiri nke ngwa agha nke a pụrụ ịhụ na anya gba ọtọ na-enye cellulose ether. Ọ bụ ihe nrụpụta cellulose enwetara site na iji cellulose sitere na osisi na owu, na-emeghachi omume na soda caustic, wee na-eji ihe na-eme ka etherifying eme ihe.
Ụdị cellulose ethers
A. Hydroxypropyl methyl cellulose (HPMC), nke a na-ejikarị akwa akwa a nụchara anụcha dị ka ihe eji eme ihe, na-eme ka ọ bụrụ nke ọma n'okpuru ọnọdụ alkaline.
B. Hydroxyethyl methylcellulose (HEMC), ether cellulose na-abụghị ionic, bụ ntụ ntụ ọcha n'ọdịdị, enweghị isi na enweghị ụtọ.
C. Hydroxyethyl cellulose (HEC), surfactant na-abụghị ionic, na-acha ọcha n'ọdịdị, enweghị isi, ntụ ntụ na-enweghị ụtọ na nke dị mfe.
Ndị dị n'elu bụ ndị na-abụghị ionic cellulose ethers, na ionic cellulose ethers (dị ka carboxymethyl cellulose CMC).
N'oge a na-eji ụrọ ntụ ntụ akọrọ, n'ihi na ionic cellulose (CMC) adịghị eguzosi ike n'ihe n'ihu ion calcium, a na-ejikarị ya eme ihe na usoro gelling inorganic na ciment na lime slaked dị ka ihe simenti. N'ebe ụfọdụ na China, ụfọdụ n'ime mgbidi putties esichara na starch gbanwetụrụ dị ka isi cementing ihe na Shuangfei ntụ ntụ dị ka filler na-eji CMC dị ka thickener. Otú ọ dị, n'ihi na ngwaahịa a dị mfe na mildew na ọ dịghị eguzogide mmiri, ọ na-eji nwayọọ nwayọọ kpochapụ ya site na ahịa. Ka ọ dị ugbu a, ether cellulose a na-ejikarị na China bụ HPMC.
A na-ejikarị cellulose ether eme ihe dị ka ihe na-ejigide mmiri na ihe siri ike na ihe ndị dabeere na ciment
Ọrụ njide mmiri ya nwere ike igbochi mkpụrụ ahụ ka ọ ghara ịmịnye oke mmiri ma gbochie ikuku nke mmiri, iji hụ na ciment nwere mmiri zuru oke mgbe ọ na-agba mmiri. Were ọrụ plasta dị ka ihe atụ. Mgbe nkịtị ciment slurry na-etinyere na isi elu, akọrọ na porous mkpụrụ ga-ngwa ngwa banye a nnukwu ego nke mmiri si slurry, na ciment slurry oyi akwa nso isi oyi akwa ga-adị mfe ida mmiri a chọrọ maka hydration. , N'ihi ya, ọ bụghị nanị na-enweghị ike na-etolite a ciment jel na bonding ike n'elu nke mkpụrụ, ma ọ na-adịkarị mfe warping na mmiri seepage, nke mere na elu ciment slurry oyi akwa dị mfe ịdapụ. Mgbe grout etinyere dị gịrịgịrị, ọ dịkwa mfe ịmepụta cracks na grout dum. Ya mere, n'oge gara aga na-arụ ọrụ plasta, a na-ejikarị mmiri eme ihe mbụ, ma ọrụ a abụghị nanị na-arụ ọrụ na-ewe oge, kamakwa àgwà ọrụ siri ike ịchịkwa.
N'ikwu okwu n'ozuzu, njide mmiri nke ciment slurry na-abawanye na mmụba nke ọdịnaya cellulose ether. Ka nnukwu viscosity nke cellulose ether agbakwunyere, ka mma na-ejigide mmiri.
Na mgbakwunye na njide mmiri na njupụta, cellulose ether na-emetụtakwa ihe ndị ọzọ nke ngwa ngwa ciment, dị ka nkwụsịtụ, ikuku ikuku, na ịba ụba ike njikọ. Cellulose ether na-ebelata nhazi na usoro siri ike nke ciment, si otú a na-agbatị oge ọrụ. Ya mere, a na-eji ya eme ihe mgbe ụfọdụ dị ka coagulant.
Site na mmepe nke ngwa agha agwakọta akọrọ,cellulose etheraghọwo ihe dị mkpa simenti ngwa agha admixture. Otú ọ dị, e nwere ọtụtụ ụdị na nkọwa nke cellulose ether, na àgwà n'etiti batches ka na-agbanwe agbanwe.
Oge nzipu: Eprel-25-2024