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 hanga whakapaipai 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 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.Engari, 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 te kaha i waenga i nga mekameka ngota i roto i te otinga ka puta.
Hei whakaputa rere i roto i te wairewa waimeha o nga pärönaki cellulose, me hinga te kaha i waenga i nga mekameka ngota, no reira ko te otinga he nui te polymerization ka nui 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 whakakapinga, ka nui ake te taumaha o te 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.I te 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