Gịnị bụ Njirimara nke carboxymethyl cellulose?

Gịnị bụ Njirimara nke carboxymethyl cellulose?

Azịza:Carboxymethyl cellulosenwekwara ihe dị iche iche n'ihi ogo ngbanwe ya dị iche iche. Ogo nke nnọchi, nke a makwaara dị ka ogo etherification, pụtara nkezi ọnụọgụ H n'ime otu OH hydroxyl atọ nke CH2COONa nọchiri. Mgbe otu hydroxyl atọ dị na mgbanaka dabeere na cellulose nwere 0.4 H na hydroxyl otu nke carboxymethyl dochie, ọ nwere ike igbari na mmiri. N'oge a, a na-akpọ ya ogo nnọchi anya 0.4 ma ọ bụ ogo nnọchi anya (ogo nnọchi anya 0.4-1.2).

Njirimara nke carboxymethyl cellulose:

(1) Ọ bụ ntụ ntụ na-acha ọcha (ma ọ bụ ọka na-enweghị isi, fibrous), enweghị ụtọ, adịghị emerụ ahụ, na-edozi ngwa ngwa n'ime mmiri, na-etolite ọdịdị na-egbuke egbuke, na ngwọta ya na-anọpụ iche ma ọ bụ obere alkaline. Ọ nwere ezigbo mgbasa na ike njikọ.

(2) Enwere ike iji ngwọta mmiri ya mee ihe dị ka emulsifier nke ụdị mmanụ / mmiri na mmiri / mmanụ. Ọ nwekwara ike emulsifying maka mmanụ na wax, yana emulsifier siri ike.

(3) Mgbe ihe ngwọta ahụ zutere nnu dị arọ ígwè dị ka lead acetate, ferric chloride, silver nitrate, stannous chloride, na potassium dichromate, mmiri ozuzo nwere ike ime. Otú ọ dị, ewezuga acetate lead, a ka nwere ike ịgbaze ya na ngwọta sodium hydroxide, na ihe ndị dị ka barium, ígwè na aluminom na-adị mfe soluble na 1% ammonium hydroxide ngwọta.

(4) Mgbe ngwọta na-ezute organic acid na inorganic acid ngwọta, mmiri ozuzo nwere ike ime. Dị ka nleba anya, mgbe pH uru bụ 2.5, turbidity na mmiri ozuzo amalitela. Ya mere, pH 2.5 nwere ike weere dị ka isi ihe dị mkpa.

(5) Maka nnu dị ka calcium, magnesium na nnu tebụl, ọ dịghị mmiri ozuzo ga-eme, ma ekwesịrị ibelata viscosity, dị ka ịgbakwunye EDTA ma ọ bụ phosphate na ihe ndị ọzọ iji gbochie ya.

(6) Okpomọkụ nwere mmetụta dị ukwuu na viscosity nke ngwọta mmiri ya. Viscosity na-ebelata n'otu aka ahụ mgbe okpomọkụ na-ebili, ma ọzọ. Nkwụsi ike nke viscosity nke ngwọta mmiri na ụlọ okpomọkụ na-anọgide na-agbanwe agbanwe, ma viscosity nwere ike nke nta nke nta ibelata mgbe ọ dị ọkụ karịa 80 ° C ruo ogologo oge. N'ozuzu, mgbe okpomọkụ anaghị agafe 110 ° C, ọ bụrụgodị na a na-edobe okpomọkụ maka awa 3, wee mee ka ọ dị jụụ ruo 25 Celsius, viscosity ka na-alaghachi na ọnọdụ mbụ ya; ma mgbe okpomọkụ na-ekpo ọkụ na 120 ° C maka awa 2, ọ bụ ezie na a na-eweghachi okpomọkụ, viscosity na-agbada site na 18.9%. .

(7) Uru pH ga-enwekwa mmetụta ụfọdụ na viscosity nke ngwọta mmiri ya. N'ozuzu, mgbe pH nke obere viscosity ngwọta na-apụ na-anọpụ iche, viscosity ya na-enwe mmetụta dị nta, ebe maka ngwọta nke ọkara-viscosity, ma ọ bụrụ na pH ya na-apụ na-anọpụ iche, viscosity na-amalite ibelata nwayọọ nwayọọ; ọ bụrụ na pH nke ngwọta viscosity dị elu na-apụ na nnọpụiche, viscosity ya ga-ebelata. Mbelata dị nkọ.

(8) Dakọtara na gluu ndị ọzọ na-edozi mmiri, ihe nro na resins. Dịka ọmụmaatụ, ọ dakọtara na gluu anụmanụ, gum arabic, glycerin na starch soluble. Ọ dakọtara na iko mmiri, mmanya polyvinyl, urea-formaldehyde resin, melamine-formaldehyde resin, wdg, mana ka ọ dị ntakịrị.

(9) Ihe nkiri a na-eme site na ịgbanye ọkụ ultraviolet maka awa 100 ka enweghị ngbanwe ma ọ bụ nhịkọ.

(10) Enwere oke viscosity atọ ịhọrọ site na ngwa ahụ. Maka gypsum, jiri viscosity ọkara (2% ngwọta aqueous na 300-600mPa·s), ọ bụrụ na ị họrọ viscosity dị elu (1% ngwọta na 2000mPa·s ma ọ bụ karịa), ị nwere ike iji ya na usoro onunu ogwu kwesịrị iwetu ya nke ọma.

(11) Ngwọta mmiri ya na-arụ ọrụ dị ka retarder na gypsum.

(12) Bacteria na microorganisms enweghị mmetụta doro anya na ụdị ntụ ntụ ya, ma ha nwere mmetụta na ngwọta mmiri ya. Mgbe mmetọ ahụ gasịrị, viscosity ga-ada ma mildew ga-apụta. Ịtinye ihe nchekwa kwesịrị ekwesị n'ọdịnihu nwere ike ịnọgide na-enwe viscosity ya ma gbochie mildew ruo ogologo oge. Ihe nchekwa dịnụ bụ: BIT (1.2-benzisothiazolin-3-otu), racebendazim, thiram, chlorothalonil, wdg. Ọnụ ego ntinye aka na ngwọta mmiri bụ 0.05% ruo 0.1%.

Kedu ka hydroxypropyl methylcellulose si dị irè dị ka ihe na-ejigide mmiri maka ihe nkedo anhydrite?

Azịza: Hydroxypropyl methylcellulose bụ onye na-ejigide mmiri na-arụ ọrụ nke ọma maka ihe cimenti gypsum. Site na mmụba nke ọdịnaya hydroxypropyl methylcellulose. Njide mmiri nke gypsum cimented ihe na-abawanye ngwa ngwa. Mgbe agbakwunyeghị ihe na-ejigide mmiri, ọnụ ọgụgụ njide mmiri nke gypsum cemented ihe dị ka 68%. Mgbe ọnụọgụ mmiri na-ejigide mmiri bụ 0.15%, ọnụọgụ mmiri nke gypsum cemented nwere ike iru 90.5%. Na mmiri na-ejigide ihe nkedo nke ala ala. Usoro onunu ogwu nke onye na-edobe mmiri kariri 0.2%, na-abawanye usoro onunu ogwu, na njigide mmiri nke gypsum cementious ihe na-abawanye nwayọọ nwayọọ. Nkwadebe nke plasta anhydrite. Usoro kwesịrị ekwesị nke hydroxypropyl methylcellulose bụ 0.1%-0.15%.

Kedu mmetụta dị iche iche nke cellulose dị iche iche na plasta nke paris?

Azịza: Ma carboxymethyl cellulose na methyl cellulose nwere ike iji dị ka mmiri na-ejigide ihe maka plasta nke paris, ma mmiri na-ejigide mmetụta nke carboxymethyl cellulose bụ nnọọ ala karịa nke methyl cellulose, na carboxymethyl cellulose nwere sodium nnu, ya mere, ọ bụ adabara Plaster nke Paris nwere retarding mmetụta na-ebelata ike nke plasta.Methyl cellulosebụ ezigbo admixture maka gypsum cimentious ihe na-ejikọta njigide mmiri, ịgbatị, na-ewusi ike, na viscosifying, ma e wezụga na ụfọdụ ụdị nwere mmetụta nkwụsịtụ mgbe usoro ọgwụgwọ dị ukwuu. dị elu karịa carboxymethyl cellulose. N'ihi nke a, ihe ka ọtụtụ n'ime gypsum composite gelling ihe na-ewere usoro nke ịgbakọta carboxymethyl cellulose na methyl cellulose, nke na-abụghị nanị na-egosipụta onwe ha àgwà (dị ka retarding mmetụta nke carboxymethyl cellulose, na-ewusi mmetụta nke methyl cellulose ), na-arụ ọrụ ha nkịtị uru (dị ka mmiri ha na-ejigide na ndim mmetụta). N'ụzọ dị otú a, ma ọrụ njigide mmiri nke gypsum cementity na-arụ ọrụ na-arụ ọrụ zuru ezu nke gypsum cementitious ihe nwere ike ime ka ọ dịkwuo mma, ebe a na-edobe ọnụ ahịa ọnụ ahịa na ebe kachasị ala.