Ko te CMC te tikanga he pūhui polymer anionic kua whakaritea ma te tauhohe i te cellulose māori me te kawakawa me te waikawa monochloroacetic, he 6400 (±1 000) te taumaha ngota.Ko nga hua matua ko te konutai konutai me te konutai glycolate.No CMC ki te whakarerekētanga cellulose māori.Kua tapaina mana "cellulose whakarerekē" e te Whakahaere Kai me te Ahuwhenua o te United Nations (FAO) me te World Health Organization (WHO).
kounga
Ko nga tohu matua hei ine i te kounga o te CMC ko te tohu whakakapinga (DS) me te ma.Ko te tikanga, he rereke nga ahuatanga o te CMC ina he rereke te DS;ko te teitei o te tohu whakakapinga, ko te pai ake o te whakarewatanga, me te pai ake o te marama me te pumau o te otinga.E ai ki nga purongo, he pai ake te maarama o te CMC ina ko te tohu whakakapinga ko te 0.7-1.2, ko te pokey o tana wairewa wai te mea nui rawa ina 6-9 te uara pH.Hei whakarite i tona kounga, i tua atu i te kowhiringa o te kaihoko etherifying, me whai whakaaro ano etahi mea e pa ana ki te tohu o te whakakapinga me te ma, penei i te hononga inenga i waenga i te alkali me te kaihoko etherifying, te wa etherification, te ihirangi wai punaha, te pāmahana. , uara pH, te kukū o te otinga me te tote.
Te tātari i nga painga me nga huakore o te konutai carboxymethyl cellulose
Ko te whakawhanaketanga o te konutai carboxymethyl cellulose kaore i kitea i mua.Ina koa i nga tau kua pahure ake nei, ko te roha o nga mara tono me te whakahekenga o nga utu whakaputa kua nui ake te rongonui o te hanga o te carboxymethyl cellulose.Ko nga hua kei runga i te hoko he whakaranu.
Na, me pehea te whakatau i te kounga o te konutai carboxymethyl cellulose, ka tātarihia mai i etahi tirohanga tinana me te matū:
Ko te mea tuatahi, ka taea te wehe mai i te pāmahana waro.Ko te 280-300 ° C te paemahana waro o te konutai carboxymethyl cellulose. Ka warohia i mua i te ekenga o tenei paanga, ka raru tenei hua.(I te nuinga o te wa ka whakamahi te waro i te oumu muffle)
Tuarua, ka tohungia e tona pāmahana whakahuri.Ko te tikanga, ka huri te tae o te konutai carboxymethyl cellulose ina tae ki tetahi pāmahana.Ko te awhe pāmahana he 190-200 °C.
Tuatoru, ka kitea mai i tona ahua.Ko te ahua o te nuinga o nga hua he paura ma, a ko te rahi o te matūriki ko te tikanga 100 mata, me te 98.5%.
Ko te konutai carboxymethyl cellulose he hua cellulose e whakamahia nuitia ana, a, he maha nga momo tono, na reira ka kitea etahi tauira i runga i te maakete.Na me pehea te tautuhi mena he hua e hiahiatia ana e nga kaiwhakamahi ka uru ki te whakamatautau tohu e whai ake nei.
Whiriwhiria te 0.5g o te konutai carboxymethyl cellulose, kaore i te tino mohio he hua na te konutai carboxymethylcellulose, memeha i roto i te 50mL o te wai me te whakaoho, me tapiri he iti i ia wa, whakaoho i te 60 ~ 70 ℃, me te wera mo te 20 meneti ki te. hanga he otinga rite, whakamatao I muri i te kitenga wai, ka mahia nga whakamatautau e whai ake nei.
1. Taapirihia he wai ki te wairewa whakamatautau kia 5 nga wa ka waimeha, ka tapirihia te 0.5mL o te wairewa whakamatautau waikawa chromotropic ki te 1 topata, ka whakamahana i roto i te pati wai mo te 10 meneti ka puta he whero-papura.
2. Taapirihia te 10 mL o te acetone ki te 5 mL o te wairewa whakamatautau, ka ruru, ka uru pai kia puta mai he rerenga ma.
3. Taapirihia te 1mL o te wairewa whakamatautau ketone sulfate ki te 5mL o te wairewa whakamatautau, uru me te wiriwiri kia puta mai te rerenga puru puru marama.
4. Ko te toenga i whiwhi i te pungarehu o tenei hua e whakaatu ana i te tauhohenga tikanga o te tote konutai, ara, te konutai carboxymethyl cellulose.
Ma enei mahi, ka taea e koe te tautuhi mena ko te hua kua hokona ko te konutai carboxymethyl cellulose me tona ma, e whakarato ana i tetahi tikanga ngawari me te whai hua mo nga kaiwhakamahi ki te kowhiri tika i nga hua.
Wā tuku: Noema-12-2022