01. Àgwà nke sodium carboxymethylcellulose
Sodium carboxymethyl cellulose bụ elektrọliti anionic polymer. Ogo nnọchi nke CMC azụmaahịa sitere na 0.4 ruo 1.2. Dabere na ịdị ọcha ya, ọdịdị ya bụ ntụ ọcha ma ọ bụ ntụ ọcha na-acha ọcha.
1. Ọdịdị nke ihe ngwọta ahụ
Ọbara mmiri nke ihe ngwọta mmiri CMC na-abawanye ngwa ngwa ka mmụba nke njupụta ahụ na-abawanye, ihe ngwọta ahụ nwekwara njirimara mmiri pseudoplastic. Ihe ngwọta nwere obere ọkwa nnọchi (DS=0.4-0.7) na-enwekarị thixotropy, viscosity doro anya ga-agbanwe mgbe etinyere ma ọ bụ wepụ shear na ihe ngwọta ahụ. Ọbara mmiri nke ihe ngwọta mmiri CMC na-ebelata ka okpomọkụ na-arị elu, mmetụta a na-agbanwe agbanwe mgbe okpomọkụ anaghị agafe 50 °C. N'oge okpomọkụ dị elu ruo ogologo oge, CMC ga-emebi. Nke a bụ ihe mere ihe mkpuchi ọbara ji dị mfe ịgbanwe ọcha ma mebie mgbe ebipụtara ihe osise dị warara nke ihe osise ọbara.
CMC eji eme glaze kwesịrị ịhọrọ ngwaahịa nwere nnukwu nnọchi, ọkachasị glaze na-agba ọbara.
2. Mmetụta nke uru pH na CMC
Ọbara mmiri nke mmiri CMC ka dị n'ọkwa nkịtị n'ọtụtụ pH, ọ na-adịkwa mma nke ukwuu n'etiti pH 7 na 9. Site na pH
Uru ahụ na-ebelata, CMC na-agbanwe site n'ụdị nnu gaa n'ụdị asịd, nke na-anaghị agbaze na mmiri ma na-akpalite. Mgbe uru pH erughị 4, ọtụtụ ụdị nnu na-agbanwe ghọọ ụdị asịd ma na-akpalite. Mgbe pH dị n'okpuru 3, ogo nnọchi ahụ erughị 0.5, ọ nwekwara ike ịgbanwe kpamkpam site na ụdị nnu gaa na ụdị asịd ahụ. Uru pH nke mgbanwe zuru oke nke CMC nwere oke nnọchi dị elu (n'elu 0.9) dị n'okpuru 1. Ya mere, gbalịa iji CMC nwere oke nnọchi maka glaze sepage.
3. Mmekọrịta dị n'etiti CMC na ion ígwè
Ion ígwè dị iche iche nwere ike ịmepụta nnu mmiri na-agbaze na CMC, nke agaghị emetụta viscosity, nghọta na ihe ndị ọzọ nke mmiri mmiri, mana Ag+ bụ ihe dị iche, nke ga-eme ka mmiri mmiri ahụ gbapụta. Ion ígwè dị iche iche, dị ka Ba2+, Fe2+, Pb2+, Sn2+, wdg. na-eme ka mmiri mmiri gbapụta; Ca2+, Mg2+, Mn2+, wdg. enweghị mmetụta na mmiri mmiri ahụ. Ion ígwè dị iche iche na-emepụta nnu na-enweghị ike ịgbaze na CMC, ma ọ bụ ihe na-akpali akpali ma ọ bụ gel, yabụ enweghị ike iji CMC mee ka ferric chloride sie ike.
E nwere ihe ndị na-ejighị n'aka na mmetụta nke nnabata nnu nke CMC:
(1) Ọ metụtara ụdị nnu ígwè, uru pH nke ngwọta ahụ na ogo nnọchi nke CMC;
(2) Ọ metụtara usoro na usoro nke CMC na nnu.
CMC nwere oke nnọchi dị elu nwere ndakọrịta ka mma na nnu, mmetụta nke itinye nnu na ngwọta CMC dịkwa mma karịa nke mmiri nnu.
CMC dị mma. Ya mere, mgbe ị na-akwadebe osmotic glaze, na-agbaze CMC na mmiri mbụ, wee tinye mmiri nnu osmotic.
02. Otu esi amata CMC n'ahịa
E kewara site na ịdị ọcha
Ọkwa dị ọcha nke ukwuu - ọdịnaya ya karịrị 99.5%;
ọkwa ọcha nke ụlọ ọrụ mmepụta ihe - ọdịnaya ya karịrị 96%;
Ngwaahịa dị nro — ihe dị n'ime ya karịrị 65%.
Nkewa site na viscosity
Ụdị viscosity dị elu - viscosity ngwọta 1% karịrị 5 Pas;
Ụdị viscosity dị n'etiti - viscosity nke ngwọta 2% karịrị 5 Pas;
Ụdị viscosity dị ala - viscosity ngwọta 2% karịrị 0.05 Pa·s.
03. Nkọwa nke ụdị ndị a na-ahụkarị
Onye nrụpụta ọ bụla nwere ụdị nke ya, a na-ekwu na e nwere ihe karịrị ụdị 500. Ụdị kachasị ewu ewu nwere akụkụ atọ: X—Y—Z.
Akwụkwọ ozi mbụ na-anọchite anya ojiji ụlọ ọrụ:
F - ọkwa nri;
I——ọkwa ụlọ ọrụ mmepụta ihe;
C - ọkwa seramiiki;
O - ọkwa mmanụ ala.
Akwụkwọ ozi nke abụọ na-anọchite anya ọkwa viscosity:
H - oke viscosity dị elu
M——ọkara viscosity
L - obere viscosity.
Mkpụrụ akwụkwọ nke atọ na-anọchite anya ogo nnọchi, ọnụọgụgụ ya kewara site na 10 bụ ezigbo ogo nnọchi nke CMC.
Ihe atụ:
Ihe nlereanya nke CMC bụ FH9, nke pụtara CMC nwere ọkwa nri, oke viscosity na ọkwa nnọchi nke 0.9.
Ihe nlereanya nke CMC bụ CM6, nke pụtara CMC nke ọkwa seramiiki, viscosity etiti na ọkwa nnọchi nke 0.6.
N'otu aka ahụ, e nwekwara akara eji eme ihe n'ọgwụ, ákwà na ụlọ ọrụ ndị ọzọ, nke a na-adịghị ahụkebe n'iji ụlọ ọrụ seramiiki eme ihe.
04. Ụkpụrụ Nhọrọ Ụlọ Ọrụ Seramiiki
1. Ịkwụsi ike na viscositi
Nke a bụ ọnọdụ mbụ maka ịhọrọ CMC maka glaze
(1) Viscosity anaghị agbanwe nke ukwuu n'oge ọ bụla
(2) Viscosity anaghị agbanwe nke ukwuu ka okpomọkụ na-arị elu.
2. Obere thixotropy
N'imepụta taịlị glazed, slurry glaze enweghị ike ịbụ thixotropic, ma ọ bụghị ya, ọ ga-emetụta ịdị mma nke elu glazed ahụ, yabụ ọ kacha mma ịhọrọ CMC nke nri. Iji belata ọnụ ahịa, ụfọdụ ndị nrụpụta na-eji CMC nke ụlọ ọrụ mmepụta ihe, a na-emetụtakwa ịdị mma glaze ahụ ngwa ngwa.
3. Lezienụ anya na usoro nnwale viscosity
(1) Ntinye CMC nwere njikọ dị elu na viscosity, yabụ a ga-elebara izi ezi nke ịtụ ihe anya anya;
(2) Lezienụ anya na otu ihe ngwọta CMC si dị. Ụzọ nnwale siri ike bụ ịkpalite ihe ngwọta ahụ ruo awa abụọ tupu ị tụọ viscosity ya;
(3) Okpomọkụ nwere nnukwu mmetụta na viscosity, yabụ a ga-elebara okpomọkụ gburugburu anya n'oge ule ahụ;
(4) Lezienụ anya na nchekwa nke ihe ngwọta CMC iji gbochie mmebi ya.
(5) Lezienụ anya n'ihe dị iche n'etiti viscosity na nkwekọ.
Oge ozi: Jenụwarị-05-2023