Ko te konutai carboxymethyl cellulose (CMC), e mohiotia ana ko te carboxymethyl cellulose. He ether cellulose polymer teitei i mahia ma te whakarereke matū i te cellulose taiao, a ko te nuinga o te hanganga ko te D-glucose e hono ana e te β_(14) nga here glycosidic.
Ko te CMC he ma, he miraka, he paura kirikiri ma, he kirikiri ranei he 0.5g/cm3 te kiato, tata kore reka, kore kakara me te hygroscopic.
Ko te Carboxymethyl cellulose he ngawari ki te marara, ka hanga he otinga colloidal marama ki roto i te wai, karekau e rewa i roto i nga whakarewa waro penei i te waiwaro.
Ina pH>10, ko te uara pH o te 1% wairewa wai he 6.5≤8.5.
Ko te tauhohenga matua e whai ake nei: ko te cellulose taiao i te tuatahi ka kawakawahia ki te NaOH, katahi ka taapirihia te waikawa chloroacetic, ka tauhohe te hauwai ki te roopu hydroxyl i te wae huka ki te roopu carboxymethyl i roto i te waikawa chloroacetic.
Ka kitea mai i te hanganga e toru nga roopu hydroxyl i ia wae glucose, ara ko C2, C3 me C6 roopu hydroxyl, a ko te tohu whakakapinga o te hauwai ki te roopu hydroxyl o te wae glucose e tohuhia ana e nga tohu tinana me te matū.
Mena ka whakakapihia nga hauwai kei runga i nga roopu hydroxyl e toru o ia waeine ki nga roopu carboxymethyl, ka tohuhia te tohu o te whakakapinga ko te 7-8, me te tohu nui o te whakakapinga o te 1.0 (ko te karaehe kai ka taea noa tenei tohu). Ko te tohu o te whakakapinga o te CMC ka pa tika ki te whakarewatanga, te whakaemulsification, te matotoru, te pumau, te aukati waikawa me te aukati tote o te CMC.
I te wa e whakamahi ana i nga hua CMC, me tino mohio tatou ki nga tohu tohu matua, penei i te pumau, te viscosity, te waikawa waikawa, te viscosity, etc.
Ko te tikanga, he rereke nga tono rereke e whakamahi ana i nga momo carboxymethyl cellulose, no te mea he maha nga momo o te viscosity e mahi ana i runga i te carboxymethyl cellulose, he rereke ano nga tohu o te tinana me te matū. Ma te mohio ki enei, ka mohio koe ki te whiriwhiri i te hua tika.
Wā tuku: Nov-07-2022