01. Njirimara nke sodium carboxymethylcellulose
Sodium carboxymethyl cellulose bụ anionic polymer electrolyte. Ogo nke nnọchi nke CMC azụmahịa sitere na 0.4 ruo 1.2. Dabere na ịdị ọcha, ọdịdị dị ọcha ma ọ bụ na-acha ọcha ntụ ntụ.
1. The viscosity nke ngwọta
The viscosity nke CMC aqueous ngwọta na-abawanye ngwa ngwa na mmụba nke ịta, na ngwọta nwere pseudoplastic eruba àgwà. Ngwọta nwere obere ngbanwe (DS=0.4-0.7) na-enwekarị thixotropy, na viscosity pụtara ìhè ga-agbanwe mgbe a na-etinye shear ma ọ bụ wepụ ya na ngwọta. Viscosity nke CMC aqueous ngwọta na-ebelata na okpomọkụ na-abawanye, na mmetụta a na-agbanwe mgbe okpomọkụ adịghị agafe 50 Celsius. Na elu okpomọkụ ruo ogologo oge, CMC ga-eweda. Nke a bụ ihe mere na bleed glaze dị mfe na-atụgharị na-acha ọcha na njọ mgbe ebi akwụkwọ mkpa ahịrị ụkpụrụ bleed glaze.
CMC a na-eji glaze kwesịrị ịhọrọ ngwaahịa nwere oke ngbanwe, karịsịa glaze na-agba ọbara.
2. Mmetụta nke pH uru na CMC
The viscosity nke CMC aqueous ngwọta na-anọgide na nkịtị na a mbara pH nso, na kasị kwụsie ike n'etiti pH 7 na 9. Na pH
Uru ahụ na-ebelata, CMC na-atụgharị site na ụdị nnu na ụdị acid, nke na-adịghị edozi na mmiri ma na-ebuli elu. Mgbe uru pH na-erughị 4, ọtụtụ n'ime ụdị nnu na-atụgharị n'ụdị acid na precipitates. Mgbe pH dị n'okpuru 3, ogo ngbanwe bụ ihe na-erughị 0,5, ọ pụkwara ịgbanwe kpamkpam site na ụdị nnu na ụdị acid. Uru pH nke ngbanwe zuru oke nke CMC nwere oke ngbanwe (n'elu 0.9) dị n'okpuru 1. Ya mere, gbalịa iji CMC na nnukwu ngbanwe maka glaze seepage.
3. Mmekọrịta dị n'etiti CMC na ion metal
Monovalent metal ion nwere ike ịmepụta salts mmiri na-agbaze na CMC, nke na-agaghị emetụta viscosity, nghọta na ihe ndị ọzọ nke ngwọta mmiri, ma Ag + bụ ihe dị iche iche, nke ga-eme ka ngwọta ahụ gbasaa. Divalent metal ion, dị ka Ba2+, Fe2+, Pb2+, Sn2+, wdg na-eme ka ngwọta na-ebuli; Ca2+, Mg2+, Mn2+, wdg enweghị mmetụta na ngwọta. Trivalent metal ion na-etolite nnu na-adịghị edozi ya na CMC, ma ọ bụ precipitate ma ọ bụ jel, yabụ enweghị ike iji CMC mee ka ferric chloride sie ike.
Enwere ejighị n'aka na mmetụta nnabata nnu nke CMC:
(1) Ọ metụtara ụdị nnu ígwè, uru pH nke ngwọta na ogo nke nnọchi nke CMC;
(2) Ọ metụtara usoro ngwakọta na usoro nke CMC na nnu.
CMC nwere ogo dị elu nke nnọchi nwere ndakọrịta ka mma na nnu, yana mmetụta nke ịgbakwunye nnu na ngwọta CMC dị mma karịa nke mmiri nnu.
CMC dị mma. Ya mere, mgbe ị na-akwadebe osmotic glaze, na-agbari CMC na mmiri na mbụ, wee tinye ngwọta nnu osmotic.
02. Otu esi amata CMC n'ahịa
Nkewa site na ịdị ọcha
High-ọcha ọkwa - ọdịnaya dị n'elu 99,5%;
Ụlọ ọrụ mmepụta ihe dị ọcha - ọdịnaya dị n'elu 96%;
Ngwaahịa crude - ọdịnaya dị n'elu 65%.
Nkewa site na viscosity
Ụdị viscosity dị elu - 1% ngwọta viscosity dị n'elu 5 Pa s;
Ụdị viscosity ọkara - viscosity nke 2% ngwọta dị n'elu 5 Pa s;
Ụdị viscosity dị ala - 2% viscosity ngwọta karịa 0.05 Pa·s.
03. Nkọwa nke ụdị nkịtị
Onye ọ bụla na-emepụta ihe nwere ihe nlereanya nke ya, a na-ekwu na e nwere ihe karịrị ụdị 500. Ihe nlereanya a na-ahụkarị nwere akụkụ atọ: X—Y—Z.
Akwụkwọ ozi mbụ na-anọchi anya ojiji ụlọ ọrụ:
F - ọkwa nri;
I——ọkwa ụlọ ọrụ;
C - ọkwa seramiiki;
O - ọkwa mmanụ ala.
Akwụkwọ ozi nke abụọ na-anọchi anya ọkwa viscosity:
H - elu viscosity
M——mmanụ viscosity
L - obere viscosity.
Akwụkwọ ozi nke atọ na-anọchi anya ogo nnọchi anya, yana ọnụọgụ ya kewara site na 10 bụ ogo ngbanwe nke CMC n'ezie.
Ọmụmaatụ:
Ihe nlereanya nke CMC bụ FH9, nke pụtara CMC nwere akara nri, viscosity dị elu na ogo nnọchi nke 0.9.
Ụdị nke CMC bụ CM6, nke pụtara CMC nke ọkwa seramiiki, viscosity ọkara na ngbanwe nke 0.6.
N'otu aka ahụ, e nwekwara akara ule ndị a na-eji na nkà mmụta ọgwụ, textiles na ụlọ ọrụ ndị ọzọ, bụ ndị a na-adịghị ahụkebe n'iji ụlọ ọrụ seramiiki eme ihe.
04. Ụkpụrụ Nhọrọ nke Ụlọ Ọrụ Ceramic
1. Nkwụsi ike viscosity
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 ọma na okpomọkụ.
2. Obere thixotropy
Na mmepụta nke taịlị glazed, slurry glaze enweghị ike ịbụ thixotropic, ma ọ bụghị ya, ọ ga-emetụta àgwà nke glazed elu, ya mere ọ kacha mma ịhọrọ nri-ọkwa CMC. Iji belata ọnụ ahịa, ụfọdụ ndị na-emepụta ihe na-eji ụlọ ọrụ mmepụta ihe CMC, na àgwà glaze na-emetụta ngwa ngwa.
3. Lezienụ anya na usoro nyocha viscosity
(1) Ntụle CMC nwere mmekọrịta dị oke ọnụ na viscosity, n'ihi ya, ekwesịrị itinye nlebara anya maka izi ezi nke nha;
(2) Lezienụ anya na ịdị n'otu nke ngwọta CMC. Usoro nnwale siri ike bụ ịkpali ihe ngwọta maka awa 2 tupu ị tụọ viscosity ya;
(3) Okpomọkụ nwere mmetụta dị ukwuu na viscosity, n'ihi ya, ekwesịrị itinye uche na ọnọdụ okpomọkụ n'oge ule;
(4) Lezienụ anya na nchekwa nke CMC ngwọta iji gbochie mmebi ya.
(5) Lezienụ anya na ọdịiche dị n'etiti viscosity na agbanwe agbanwe.
Oge nzipu: Jan-05-2023