Ko te Carboxymethyl cellulose (Carboxy Methyl Cellulose, CMC) he hua ether o te cellulose taiao.He ma, he paku kowhai ranei te paura.He surfactant anionic wairewa-wai.He hongi, he reka, he paitini, he tino pai te wairewa., Viscosity, emulsification, diffusion, enzyme resistance, pūmautanga me te taiao, CMC te whakamahia whānuitia i roto i te hanga pepa, pueru, tā me te tae, hinu, ahuwhenua matomato me mara polymer.I roto i te umanga pepa, he maha nga tau e whakamahia ana te CMC ki nga apiha rahinga mata me nga whakapiri paninga mo nga tau maha, engari kaore ano kia pai te whanake me te whakamahi hei kaihoko whakakaha makuku-mutunga mahi pepa.
He kino te utu o te mata o te cellulose, no reira, karekau nga polyelectrolytes anionic e whakaemi.Heoi ano, kua kitea e nga rangahau ka taea te hono atu a CMC ki te mata o te penupenu chlorine-free bleaching (ECF), ka kaha ake te kaha o te pepa;i tua atu, ko te CMC ano he dispersant, e taea te whakapai ake i te marara o te muka i roto i te whakatārewatanga, reira mau mai pepa evenness.Ko te whakapai ake i te tohu ka piki ake te kaha tinana o te pepa;ano, ko te roopu carboxyl i runga i te CMC ka hanga he here hauwai me te roopu hydroxyl o te cellulose i runga i te muka hei whakanui ake i te kaha o te pepa.Ko te kaha o te pepa whakakaha e pa ana ki te tohu me te tohatoha o te CMC adsorption i runga i te mata o te muka, me te kaha me te tohatoha o te CMC adsorption i runga i te mata o te muka e pa ana ki te tohu o te whakakapi (DS) me te tohu o te polymerization (DP) o CMC;te utu, te tohu whiu, me te pH o te muka , te kaha katote o te reo, me etahi atu ka pa katoa ki te nui o te adsorption o CMC i runga i te mata o te muka, na reira ka pa ki te kaha o te pepa.
Ko tenei pepa e aro ana ki te awe o te CMC maaku-mutunga tukanga tāpiri me ona āhuatanga i runga i te kaha pepa whakarei, i roto i te tikanga ki te arotake i te pūmanawa tono o CMC rite te mākū-mutunga kaihoko whakapakari pepa, me te whakarato i te pūtake mo te tono me te kōtuitanga o CMC i roto i te hanga pepa maku-mutunga.
1. Whakaritenga o te otinga CMC
Kia tika te pauna i te 5.0 g o te CMC (kua tino maroke, kua huri ki te CMC parakore), me ata tapiri atu ki te 600ml (50°C) te wai matutu i raro i te whakakorikori (500r/min), te whakaoho tonu (20min) kia marama te otinga, ka waiho. whakamatao ki te pāmahana rūma , whakamahia te ipu 1L rōrahi ki te rōrahi pūmau ki te whakarite i te wairewa wai CMC me te kukū o te 5.0g/L, ka waiho ki te wahi matao i te pāmahana rūma mo te 24 haora mo te whakamahi i muri mai.
Ma te whakaaro ki te tono ahumahi tonu (te hanga pepa kore) me te painga whakarei ake o te CMC, ka 7.5 te pH, ka piki ake te taurangi tensile, te taupae pakaru, te tohu roimata me te mau tonu o te pepa pepa ma te 16.4 e pa ana ki te kaha o te mana patea. tauira.%, 21.0%, 13.2% me te 75%, me te kaha whakanikotanga pepa.Tīpakohia te pH 7.5 hei uara pH mo te taapiri CMC o muri mai.
2. Te painga o te inenga CMC i runga i te whakapainga pepa pepa
Tāpirihia te NX-800AT carboxymethyl cellulose, ko te inenga he 0.12%, 0.20%, 0.28%, 0.36%, 0.44% (mo te tino kiko maroke).I raro ano i era atu tikanga, ko te paatea kaore he taapiri CMC i whakamahia hei tauira mana.
Ina he 0.12% te ihirangi CMC, ka whakaatuhia e nga hua ka piki ake te taupū tensile, te taupū pakaru, te taupū roimata me te kaha o te kopaki o te pepa pepa ma te 15.2%, 25.9%, 10.6% me te 62.5% ka whakatauritea ki te tauira tuwhera.Ka taea te kite ma te whakaaro ki te mooni o te ahumahi, ka taea tonu te whiwhi i te painga whakarei ake ina kowhiria te inenga iti o te CMC (0.12%).
3. Ko te painga o te taumaha irapoo CMC ki te whakapakari i te pepa pepa
I raro i etahi ahuatanga, ko te viscosity o te CMC e tohu ana i te rahi o tona taumaha ngota, ara, te tohu o te polymerization.Ko te taapiri i te CMC ki te whakatārewatanga o nga rakau pepa, he nui te awe o te pokey o te CMC ki te paanga o te whakamahinga.
Tāpiri 0.2% NX-50AT, NX-400AT, NX-800AT carboxymethyl cellulose hua whakamātautau aua, te pokey he 0 tikanga tauira pātea.
Ina 400～600mPa•s te pokey o te CMC, ka taea e te taapiri o te CMC te whai hua whakakaha pai.
4. Te paanga o te tohu whakakapinga ki te kaha o te pepa whakakaha CMC
Ko te tohu o te whakakapinga o te CMC kua tapirihia ki te pito maku e whakahaeretia ana i waenga i te 0.40 me te 0.90.Ko te teitei o te tohu whakakapinga, ko te pai ake o te whakakotahitanga me te whakarewatanga o te whakakapinga, me te riterite o te taunekeneke ki te muka, engari ka piki ake ano te utu kino, ka pa ki te whakakotahitanga i waenga i te CMC me te muka [11].Taapirihia te 0.2% o te NX-800 me te NX-800AT carboxymethyl cellulose he rite tonu te pokey, ka whakaatuhia nga hua ki te Whakaahua 4.
Ko te kaha pakaru, te kaha roimata, me te kaha whakakopa ka heke katoa i te pikinga o te tohu whakakapinga CMC, ka eke ki te teitei ka 0.6 te tohu whakakapinga, ka piki ake e 21.0%, 13.2%, me te 75% ka whakatauritea ki te tauira waatea.Hei whakataurite, ko te CMC me te tohu o te whakakapinga o te 0.6 he pai ake ki te whakarei ake i te kaha o te pepa.
5 Whakamutunga
5.1 He awe nui te pH o te slurry slurry wet end system ki te kaha o te pepa pepa whakaniko i te CMC.I te wa ko te pH kei roto i te 6.5 ki te 8.5, ka taea e te taapiri o te CMC te whai hua whakakaha pai, me te whakakaha CMC he pai mo te hanga pepa kore.
5.2 He awe nui te nui o te CMC ki te whakapakari i te pepa CMC.Na te pikinga o nga ihirangi CMC, ka piki te kaha o te kaha, te pakaru o te pakaru me te kaha roimata o te pepa pepa i te tuatahi, katahi ka mau tonu te ahua, i te mea ko te kaha o te whakakopa i te ahua o te piki tuatahi ka heke.Ina he 0.12% te inenga, ka taea te whiwhi i te paanga whakakaha pepa.
Ko te taumaha ngota o te 5.3CMC he nui ano te paanga ki te kaha whakapakari o te pepa.Ka taea e te CMC me te 400-600mPa·s te viscosity te whakapakari i te rau pai.
5.4 Ko te tohu o te whakakapinga CMC ka pa ki te kaha whakakaha o te pepa.Ko te CMC me te tohu whakakapinga o te 0.6 me te 0.9 ka taea te whakapai ake i te mahi kaha pepa.Ko te painga whakarei ake o te CMC me te tohu whakakapinga o te 0.6 he pai ake i tera o te CMC me te tohu whakakapinga o te 0.9.
Te wa tuku: Hanuere-28-2023