Carboxymethyl cellulose (Carboxy Methyl Cellulose, CMC) bụ ihe ether sitere na cellulose eke.Ọ na-acha ọcha ma ọ bụ ubé odo ntụ ntụ.Ọ bụ anonic surfactant nke na-agbaze mmiri.Ọ naghị esi ísì, enweghị ụtọ, adịghị egbu egbu, ma nwee ọmarịcha mmiri solubility., Viscosity, emulsification, diffusion, enzyme resistance, nkwụsi ike na gburugburu ebe obibi enyi, CMC na-ọtụtụ ebe na-eji papermaking, textile, obibi na dyeing, mmanụ ala, green agriculture na polymer ubi.N'ime ụlọ ọrụ akwụkwọ, a na-eji CMC eme ihe n'ọtụtụ ebe na ndị na-emepụta ihe na-emepụta ihe na ihe mkpuchi mkpuchi ruo ọtụtụ afọ, mana emebebeghị ya nke ọma ma tinye ya n'ọrụ dị ka onye na-emepụta ihe na-eme ka mmiri sie ike.
A na-ebubo elu nke cellulose n'ụzọ na-ezighị ezi, ya mere, polyelectrolytes anionic anaghị anabata ya.Otú ọ dị, ọmụmụ egosiwo na CMC nwere ike itinye n'elu nke elemental chlorine-free bleaching (ECF), nke nwere ike ime ka ike nke akwụkwọ ahụ dịkwuo ike;na mgbakwunye, CMC bụkwa a dispersant, nke nwere ike melite mgbasa nke eriri na nkwusioru, si otú na-eweta akwụkwọ evenness.Ọganihu nke ogo na-abawanye ike anụ ahụ nke akwụkwọ ahụ;Ọzọkwa, otu carboxyl dị na CMC ga-eme ka njikọ hydrogen na otu hydroxyl nke cellulose na eriri iji mee ka ike nke akwụkwọ ahụ dịkwuo ike.Ike nke akwụkwọ a na-emesi ike metụtara ogo na nkesa nke mgbasa ozi CMC n'elu eriri, na ike na nkesa nke CMC adsorption n'elu eriri ahụ metụtara ogo nke nnọchi (DS) na ogo nke polymerization (DP). nke CMC;ụgwọ, iti ogo, na pH nke eriri , ike ionic nke ọkara, wdg ga-emetụta ọnụọgụ mgbasa ozi nke CMC na elu eriri, si otú ahụ na-emetụta ike nke akwụkwọ ahụ.
Akwụkwọ a na-elekwasị anya na mmetụta nke usoro mgbakwunye mmiri mmiri-ọgwụgwụ CMC na njirimara ya na nkwalite ike akwụkwọ, iji nyochaa ikike ngwa nke CMC dị ka onye na-emepụta ihe na-eme ka mmiri dị ike, ma nye ihe ndabere maka ntinye na njikọ nke CMC. na mpempe akwụkwọ mmiri-ọgwụgwụ.
1. Nkwadebe nke ngwọta CMC
Jiri nlezianya tụọ 5.0 g nke CMC (nke akọrọ kpamkpam, gbanwee na CMC dị ọcha), jiri nwayọọ nwayọọ tinye ya na 600ml (50 ° C) mmiri distilled n'okpuru edemede (500r / min), nọgide na-akpali (20min) ruo mgbe ngwọta doro anya, ma hapụ ya. dị jụụ na ụlọ okpomọkụ, jiri 1L volumetric flask ka ọ bụrụ olu mgbe niile iji dozie ngwọta mmiri CMC na ntinye nke 5.0g / L, ma hapụ ya ka ọ guzoro n'ebe dị mma na ụlọ okpomọkụ maka awa 24 maka iji mee ihe.
N'ịtụle n'ezie ngwa ụlọ ọrụ mmepụta ihe (na-anọpụ iche papermaking) na CMC nkwalite mmetụta, mgbe pH bụ 7.5, na tensile index, gbawara index, akwa index na mpịachi ntachi obi nke akwụkwọ mpempe akwụkwọ na-n'otu n'otu na-abawanye site 16.4 n'ihe metụtara ike kwekọrọ ekwekọ nke oghere akara. sample.%, 21.0%, 13.2% na 75%, nwere mmetụta nkwalite akwụkwọ doro anya.Họrọ pH 7.5 dị ka uru pH maka mgbakwunye CMC na-esote.
2. Mmetụta nke usoro onunu ogwu CMC na nkwalite mpempe akwụkwọ
Tinye NX-800AT carboxymethyl cellulose, usoro onunu ogwu bụ 0.12%, 0.20%, 0.28%, 0.36%, 0.44% (maka mkpụrụ osisi akọrọ zuru oke).N'okpuru otu ọnọdụ ndị ọzọ, a na-eji oghere na-enweghị agbakwunye CMC dị ka ihe nlele njikwa.
Mgbe ọdịnaya CMC dị 0.12%, nsonaazụ ya na-egosi na ntinye aka nke tensile, index gbawara, ntinye anya mmiri na ike mpịachi nke mpempe akwụkwọ na-abawanye site na 15.2%, 25.9%, 10.6% na 62.5% n'otu n'otu ma e jiri ya tụnyere oghere oghere.Enwere ike ịhụ na n'ịtụle eziokwu ụlọ ọrụ mmepụta ihe, a ka nwere ike nweta mmetụta nkwalite dị mma mgbe a na-ahọrọ obere usoro nke CMC (0.12%).
3. Mmetụta nke CMC molecular arọ na mpempe akwụkwọ ike
N'okpuru ọnọdụ ụfọdụ, viscosity nke CMC na-anọchi anya nha nke ịdị arọ ya, ya bụ, ogo nke polymerization.Na-agbakwụnye CMC na nkwusioru ngwaahịa akwụkwọ, viscosity nke CMC nwere mmetụta dị ukwuu na mmetụta eji eme ihe.
Tinye 0.2% NX-50AT, NX-400AT, NX-800AT carboxymethyl cellulose ule nsonaazụ n'otu n'otu, viscosity bụ 0 pụtara oghere sample.
Mgbe viscosity nke CMC bụ 400 ~ 600mPa • s, mgbakwunye nke CMC nwere ike nweta ezigbo ume ume.
4. Mmetụta nke ogo ngbanwe na ike nke CMC-akwalite akwụkwọ
A na-achịkwa ogo ngbanwe nke CMC na njedebe mmiri n'etiti 0.40 na 0.90.Ka ogo nke ngbanwe dị elu, ka mma ngbanwe na ịdị n'otu na ịdị mma na-adịwanye mma, yana mmekọrịta ya na eriri ahụ na-edobe anya, mana ụgwọ na-adịghị mma na-abawanye kwa nke a, nke ga-emetụta njikọ dị n'etiti CMC na eriri [11].Tinye 0.2% nke NX-800 na NX-800AT carboxymethyl cellulose nwere otu viscosity n'otu n'otu, a na-egosipụta nsonaazụ ya na Figure 4.
Ike mgbawa, ike ndọkasị, na ike mpịachi niile na-ebelata site na mmụba nke ogo ngbanwe CMC, wee rute oke mgbe ogo nnọchi anya bụ 0.6, nke abawanyela site na 21.0%, 13.2%, na 75% ma e jiri ya tụnyere ihe nlele efu.N'iji ya tụnyere, CMC nwere ogo nke nnọchi nke 0.6 na-enye aka na nkwalite nke ike akwụkwọ.
5 Nkwubi okwu
5.1 pH nke usoro njedebe mmiri mmiri slurry nwere mmetụta dị mkpa na ike nke mpempe akwụkwọ CMC na-akwalite.Mgbe pH dị n'etiti 6.5 ruo 8.5, mgbakwunye nke CMC nwere ike ịmepụta mmetụta dị ike nke ọma, na ike CMC kwesịrị ekwesị maka ịmepụta akwụkwọ na-anọpụ iche.
5.2 Ọnụ ọgụgụ nke CMC nwere mmetụta dị ukwuu na ike nke akwụkwọ CMC.Site na mmụba nke ọdịnaya CMC, ike mgbakasị ahụ, nkwụsi ike na-agbawa na ike akwa nke mpempe akwụkwọ ahụ na-ebu ụzọ rịa elu wee na-eme ka ọ dị ntakịrị, ebe ntachi obi na-atụgharị na-egosi usoro nke ibuwanye ibu na mbụ wee na-ebelata.Mgbe usoro onunu ogwu bụ 0.12%, enwere ike nweta mmetụta ike akwụkwọ doro anya.
Ihe dị arọ nke molekụla nke 5.3CMC na-enwekwa mmetụta dị ukwuu na mmetụta ike nke akwụkwọ ahụ.CMC nwere viscosity nke 400-600mPa·s nwere ike nweta ume akwụkwọ dị mma.
5.4 Ogo nke CMC ngbanwe nwere mmetụta na-ewusi ike nke akwụkwọ ahụ.CMC nwere ogo ngbanwe nke 0.6 na 0.9 nwere ike imeziwanye arụmọrụ ike akwụkwọ.Mmetụta nkwalite nke CMC nwere ogo ngbanwe nke 0.6 dị mma karịa nke CMC nwere akara ngbanwe nke 0.9.
Oge nzipu: Jan-28-2023