N'ime ngwakọta nke ụrọ ntụ ntụ akọrọ, methyl cellulose bụ ihe mgbakwunye dịtụ ala, mana o nwere ihe mgbakwunye dị mkpa nke 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 bụ cellulose ether. Ọ bụ ihe na-emepụta cellulose enwetara site na iji cellulose sitere na osisi na owu, na-emeghachi omume na soda caustic, na-eji ihe na-emepụta ihe na-emepụta ya.
Ụdị Methyl Cellulose Ether
A. Hydroxypropyl methylcellulose (HPMC) bụ nke sitere na owu a nụchara anụcha nke ukwuu dị ka akụrụngwa, nke a na-akpachapụ nke ọma n'okpuru ọnọdụ alkaline.
B. Hydroxyethyl methyl cellulose (HEMC), ether cellulose na-abụghị ionic, bụ ntụ ntụ ọcha, enweghị isi na enweghị ụtọ.
C. Hydroxyethylcellulose (HEC) bụ ihe na-abụghị ionic surfactant, na-acha ọcha n'ọdịdị, enweghị isi na enweghị ụtọ na ntụ ntụ na-adị 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, ma n'ihi na ngwaahịa a na-adịkarị mfe mildew na ọ bụghị mmiri na-eguzogide, ọ na-eji nwayọọ nwayọọ kpochapụ. site n'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 ịmịkọrọ mmiri dị ukwuu ngwa ngwa 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 n'elu nke mkpụrụ, akọrọ na porous mkpụrụ ga-ngwa ngwa banye a nnukwu ego nke mmiri si slurry, na ciment slurry oyi akwa nso na mkpụrụ ga-adị mfe ida ya hydration. Ya mere, ọ bụghị nanị na-enweghị ike na-etolite a ciment jel na nrapado ike n'elu nke mkpụrụ, ma mfe ime ka 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'ime ọrụ plasta n'oge gara aga, a na-ejikarị mmiri eme ihe ndabere, ma ọrụ a na-arụsi ọrụ ike ma na-ewe oge, na 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 ahụ na-agbatị oge ọrụ, ya mere a na-eji ya eme ihe mgbe ụfọdụ dị ka onye nhazi nhazi.
Site na mmepe nke ngwa ngwa agwakọta akọrọ, cellulose ether aghọwo ihe dị mkpa simenti ngwa ngwa admixture. Otú ọ dị, e nwere ọtụtụ ụdị na nkọwa nke cellulose ether, na àgwà n'etiti batches ka na-agbanwe agbanwe.
Ọ dịkwa mkpa ịṅa ntị mgbe ị na-eji:
1. Arụ ọrụ nke ngwa agha gbanwetụrụ nwere njikọ chiri anya na mmepe viscosity nke cellulose ether. Ọ bụ ezie na ngwaahịa na elu nominal viscosity nwere dịtụ elu ikpeazụ viscosity, n'ihi na ngwa ngwa mgbasa mgbasa, ọ na-ewe a ogologo oge iji nweta ikpeazụ viscosity; na mgbakwunye, The cellulose ether na coarser ụmụ irighiri na-ewe ogologo oge iji nweta ikpeazụ viscosity, ya mere ngwaahịa na elu viscosity bụchaghị na-arụ ọrụ mma àgwà.
2. N'ihi njedebe nke ogo polymerization nke cellulose ether raw material, oke viscosity nke cellulose ether nwekwara oke.
3. Ọ dị mkpa ịlele ịzụta, usoro mmepụta na nyocha ụlọ ọrụ iji zere mgbanwe dị mma.
Oge nzipu: Mar-29-2023