1. hygroscopicity
Carboxymethylcellulose sodium CMC nwere otu mmịpụta mmiri dị ka gluu ndị ọzọ na-agbaze mmiri. Ntụle iru mmiri ya na-abawanye na mmụba nke iru mmiri ma na-ebelata na mmụba nke okpomọkụ. Ka DS dị elu, ka iru mmiri na-abawanye, na ngwaahịa ahụ na-esiwanye ike na mmịnye mmiri. Ọ bụrụ na e meghere akpa ahụ ma tinye ya na ikuku nke nwere oke iru mmiri ruo oge ụfọdụ, ọdịnaya mmiri ya nwere ike iru 20%. Mgbe ọdịnaya mmiri dị 15%, ụdị ntụ ntụ nke ngwaahịa agaghị agbanwe. Mgbe ọdịnaya mmiri ruru 20%, ihe ụfọdụ ga-agbakọta ma rapara n'ahụ ibe ha, na-ebelata mmiri nke ntụ ntụ. CMC ga-abawanye n'ịdị arọ mgbe ọ nwetasịrị mmiri, yabụ, a ga-etinye ụfọdụ ngwaahịa a na-akpakọbeghị n'ime akpa ikuku ma ọ bụ chekwaa ya n'ebe kpọrọ nkụ.
2. Carboxymethyl Cellulose sodium CMC agbazere
Carboxymethylcellulose sodium CMC, dị ka polymers ndị ọzọ na-agbaze mmiri, na-egosipụta ọzịza tupu agbaze. Mgbe nnukwu ego nke carboxymethylcellulose sodium CMC ngwọta kwesịrị ka a kwadebere, ma ọ bụrụ na ọ bụla urughuru bụ uniformly fụrụ akpụ, mgbe ahụ ngwaahịa dissolves ngwa ngwa. Ọ bụrụ na a na-atụba ihe nlele ahụ n'ime mmiri ngwa ngwa ma rapara na ngọngọ, a ga-emepụta "anya azụ". Ndị na-esonụ na-akọwa usoro ngwa ngwa dissolving CMC: nwayọọ nwayọọ tinye CMC n'ime mmiri n'okpuru agafeghị oke edemede; A na-agbasasị CMC na ihe mgbaze mmiri na-agbaze (dị ka ethanol, glycerin), wee jiri nwayọọ nwayọọ tinye mmiri n'okpuru mkpali na-adịghị mma; Ọ bụrụ na ekwesịrị ịgbakwunye ihe mgbakwunye ntụ ntụ ndị ọzọ na ngwọta, buru ụzọ gwakọta ihe mgbakwunye na ntụ ntụ CMC, wee tinye mmiri ka ọ gbazee; maka ịdị mma nke ndị ọrụ, a na-ewepụta ngwa ngwa granule na ntụ ntụ.
3. Rheology nke Sodium Carboxymethyl Cellulose CMC Solution
Sodium carboxymethyl cellulose CMC ngwọta bụ mmiri na-abụghị Newtonian, nke na-egosi ala viscosity na elu na-agba, ya bụ, n'ihi na viscosity uru nke sodium carboxymethyl cellulose CMC na-adabere na nha ọnọdụ, ya mere, "o doro anya viscosity" na-eji na-akọwa ya. okike.
Egosiputara na eserese rheological curve: Ọdịdị nke mmiri ndị na-abụghị Newtonian bụ na mmekọrịta dị n'etiti ọnụ ọgụgụ shear (agbagharị na-agbagharị na viscometer) na ike shear (torque of the viscometer) abụghị njikọ dị n'ahịrị, kama ọkpụ.
Ihe ngwọta Carboxymethyl cellulose sodium CMC bụ mmiri mmiri pseudoplastic. Mgbe ị na-atụle viscosity, ngwa ngwa na-agbagharị agbagharị, na-adị ntakịrị ka viscosity a tụrụ atụ, nke a na-akpọ mmetụta mkparị nke shear.
4. Carboxymethyl Cellulose sodium CMC viscosity
1) Viscosity na nkezi ogo nke polymerization
The viscosity nke sodium carboxymethylcellulose CMC ngwọta tumadi dabere na nkezi ogo polymerization nke cellulose chains na-akpụ akpụ. Enwere njikọ dị nso nke ahịrị n'etiti viscosity na nkezi ogo polymerization.
2) Viscosity na itinye uche
Mmekọrịta dị n'etiti viscosity na itinye uche nke ụfọdụ ụdị sodium carboxymethylcellulose CMC. Viscosity na itinye uche bụ ihe dị ka logarithmic. Sodium carboxymethyl cellulose CMC ngwọta nwere ike na-emepụta nnọọ elu viscosity na ala ịta, a àgwà na-eme ka CMC ike ga-eji dị ka ihe magburu onwe thickener na ngwa.
3) Viscosity na okpomọkụ
The viscosity nke carboxymethylcellulose sodium CMC aqueous ngwọta mbelata na-abawanye nke okpomọkụ, n'agbanyeghị ụdị na itinye uche, omume nke ngwọta viscosity na okpomọkụ mmekọrịta curve bụ ihu ọma otu.
4) Viscosity na pH
Mgbe pH bụ 7-9, viscosity nke CMC ngwọta ruru ya kacha ma kwụsie ike. Viscosity nke sodium carboxymethylpyramid agaghị agbanwe nke ukwuu n'ime pH nso nke 5-10. CMC na-agbaze ngwa ngwa na ọnọdụ alkaline karịa na-anọpụ iche. Mgbe pH>10, ọ ga-eme ka CMC mebie ma belata viscosity. Mgbe a na-agbakwunye acid na ngwọta CMC, nkwụsi ike nke ngwọta na-ebelata n'ihi na H + na ngwọta na-anọchi Na + na eriri molecular. Na ngwọta acid siri ike (pH = 3.0-4.0) ọkara-sol na-amalite ịmalite, nke na-ebelata viscosity nke ngwọta. Mgbe pH <3.0, CMC na-amalite ịbụ nke a na-apụghị ịsọpụrụ na mmiri ma mepụta CMC acid.
CMC nwere ogo dị elu nke nnọchi dị ike na acid na alkali na-eguzogide karịa CMC nwere DS dị ala; CMC nwere obere viscosity siri ike na acid na alkali na-eguzogide karịa CMC nwere nnukwu viscosity.
Oge nzipu: Jan-28-2023