Ko te pokey o te konutai carboxymethyl cellulose ka wehewehea ki nga reanga maha e ai ki nga whakamahinga rereke. Ko te viscosity o te momo horoi ko 10 ~ 70 (i raro iho i te 100), ko te rohe o runga o te viscosity mai i te 200 ~ 1200 mo te whakapaipai whare me etahi atu ahumahi, a, ko te viscosity o te karaehe kai ka nui ake. Kei runga katoa ratou i te 1000, a ko te pokey o nga momo ahumahi kaore i te rite.
Na te whanuitanga o ana whakamahinga.
Ko te pokey o te konutai carboxymethyl cellulose e pa ana ki te papatipu ngota, te kukū, te pāmahana me te uara pH, ka konatunatua ki te ethyl, carboxypropyl cellulose ranei, gelatin, xanthan gum, carrageenan, mawhitiwhiti kapia, guar gum , agar, konutai alginate, he pai te hototahitanga o te pectin, te kapia arabic me te māngaro me ona hua (arā, te whakahiatotanga).
A, no te te uara pH ko 7, te pokey o te konutai carboxymethyl cellulose otinga ko te teitei, a ka ko te uara pH ko 4 ~ 11, he āhua pūmau. Ko te Carboxymethylcellulose te ahua o te whakarewa kawakore me nga tai haukinia ka whakarewahia ki te wai. Ko nga katote whakarewa divalent Ca2+, Mg2+, Fe2+ ka pa ki tona pokey. Ko nga konganuku taumaha penei i te hiriwa, te parei, te chromium, te Fe3+ ranei ka taea e ia te whakaheke mai i te otinga. Mena kei te whakahaeretia te kukū o nga katote, penei i te taapiri o te waikawa citric agent chelating, ka taea te hanga i tetahi otinga katoka ake, ka puta he kapia ngawari, pakeke ranei.
Ko te konutai carboxymethyl cellulose he momo cellulose taiao, he mea hanga mai i te miro miro, te penupenu rakau ranei hei rauemi mata, ka tukuna ki te tauhohenga etherification me te waikawa monochloroacetic i raro i nga tikanga kawakore.
E ai ki nga whakaritenga o nga rauemi mata me te whakakapi i te hauwai hydroxyl i roto i te waeine D-glucose cellulose e te roopu carboxymethyl, ka whiwhi nga pūhui polymer wairewa me nga nekehanga rereke o te whakakapi me nga tohatoha taumaha ngota rereke.
No te mea he maha nga ahuatanga ahurei me te tino pai o te konutai carboxymethyl cellulose, ka whakamahia nuitia i roto i te ahumahi matū o ia ra, te kai me te rongoa me etahi atu mahi ahumahi.
Ko tetahi o nga tohu tino nui o te konutai carboxymethyl cellulose ko te viscosity o te konutai carboxymethyl cellulose. Ko te uara o te pokey e pa ana ki nga ahuatanga rereke penei i te kukū, te pāmahana me te tere kutikuti. Heoi, ko nga mea penei i te kukū, te pāmahana me te tere kutikuti ko nga mea o waho e pa ana ki te pokey o te konutai carboxymethyl cellulose.
Ko te taumaha o te ngota me te tohatoha ngota ko nga mea o roto e pa ana ki te pokey o te otinga konutai carboxymethyl cellulose. Mo te whakahaere whakangao me te whanaketanga hua o te konutai carboxymethyl cellulose, ko te rangahau i te taumaha o te ngota me te tohatoha o te taumaha ngota he mea tino nui te uara tohutoro, ko te pokey Ka taea e te ine te mahi i tetahi mahi tohutoro anake.
Ko nga ture a Newton mo te rheology, panuihia nga korero e tika ana mo te "rheology" i roto i te matū tinana, he uaua ki te whakamarama i roto i te kotahi, e rua ranei nga rerenga korero. Mena me kii e koe: mo te wairewa waimeha o te cmc tata ki te wai Newtonian, he rite te ahotea kutikuti ki te reiti tapatapahi, a ko te whakarea taurite i waenganui i aua mea ka kiia ko te whakarea pokey, te pokey kinematic ranei.
Ko te pokey ka puta mai i nga toi i waenga i nga mekameka ngota ngota cellulose, tae atu ki nga kaha marara me nga here hauwai. Otirā, ko te polymerization o te pärönaki cellulose ehara i te hanga ahorangi engari he hanganga peka-maha. I roto i te otinga, he maha nga cellulose manga-maha e hono ana ki te hanga i te hanganga whatunga mokowā. Ko te kaha ake o te hanganga, ka nui ake nga kaha i waenga i nga mekameka ngota i roto i te otinga ka puta.
Ki te whakaputa rere i roto i te wairewa waimeha o te pärönaki cellulose, me hinga te kaha i waenga i nga mekameka ngota, no reira ko te otinga he nui te polymerization me kaha ake te kaha ki te whakaputa rere. Mo te ine pokey, ko te kaha o te otinga CMC ko te taumahatanga. I raro i te ahua o te kaha o te kaha, ko te hanganga mekameka o te otinga CMC me te nui o te polymerization he kaha nui, a he puhoi te rere. Ko te rere puhoi e whakaatu ana i te pokey.
Ko te pokey o te konutai carboxymethyl cellulose e tino pa ana ki te taumaha ngota, me te iti o te mahi ki te tohu o te whakakapi. Ko te nui ake o te tohu o te whakakapinga, ka nui ake te taumaha ngota, no te mea he nui ake te taumaha ngota o te roopu carboxymethyl kua whakakapia i te roopu hydroxyl o mua.
Ko te tote konutai o te cellulose carboxymethyl ether, he anionic cellulose ether, he ma, he miraka ma ranei te paura kirikiri ma, he kirikiri ranei, he 0.5-0.7 g/cm3 te kiato, tata kore kakara, kore reka, me te hygroscopic. He ngawari ki te marara ki te wai hei hanga i tetahi otinga colloidal maramara, karekau e rewa i roto i nga whakarewa waro penei i te waiwaro. Ko te pH o te 1% wairewa wai he 6.5 ki te 8.5. Ina pH>10, <5 ranei, ka tino heke te pokey o te konutai carboxymethylcellulose, a ko te pai te mahi ina pH=7.
He waiariki. Ka tere te piki o te pokey ki raro i te 20 ℃, ā, ka āta huri i te 45 ℃. Ko te whakamahana mo te wa roa i runga ake i te 80 ℃ ka taea te whakakore i te colloid me te whakaiti i te pokey me te mahi. He ngawari ki te wairewa i roto i te wai, a he marama te otinga; he tino pumau i roto i te wairewa kawakore, a he ngawari ki te hauwai i te aroaro o te waikawa. Ina 2-3 te uara pH, ka tohe.
Wā tuku: Nov-07-2022