Ko te cellulose ether he pūmua hangai i hangaia mai i te cellulose tūturu mā te whakarerekētanga matū. Ko te cellulose ether he mea ahu mai i te cellulose tūturu. He rerekē te hanga o te cellulose ether i ngā pūmua hangai. Ko tōna rauemi taketake ko te cellulose, he matū pūmua tūturu. Nā te āhua motuhake o te hanganga cellulose tūturu, kāore e taea e te cellulose tonu te tauhohe ki ngā kaihoko etherification. Heoi, i muri i te maimoatanga o te kaihoko pupuhi, ka whakangaromia ngā here hauwai kaha i waenga i ngā mekameka ngota me ngā mekameka, ā, ko te tukunga kaha o te rōpū hydroxyl ka huri hei cellulose alkali tauhohe. Whiwhi cellulose ether.
Ko ngā āhuatanga o ngā cellulose ethers e whakawhirinaki ana ki te momo, te maha me te tohatoha o ngā whakakapinga. Ko te whakarōpūtanga o ngā cellulose ethers e hangai ana hoki ki te momo o ngā whakakapinga, te taumata o te etherification, te wairewa me ngā āhuatanga tono e pā ana. E ai ki te momo o ngā whakakapinga i runga i te mekameka ngota, ka taea te wehewehe ki te monoether me te ether whakauru. I te nuinga o te wā ka whakamahia e mātou te mc hei monoether, me te HPmc hei ether whakauru. Ko te methyl cellulose ether mc te hua i muri i te whakakapinga o te rōpū hydroxyl i runga i te waeine glucose o te cellulose taiao ki te rōpū methoxy. He hua i whiwhihia mā te whakakapi i tētahi wāhanga o te rōpū hydroxyl i runga i te waeine me te rōpū methoxy me tētahi atu wāhanga me te rōpū hydroxypropyl. Ko te tātai hanganga ko [C6H7O2(OH)3-mn(OCH3)m[OCH2CH(OH)CH3]n]x Hydroxyethyl methyl cellulose ether HEmc, koinei ngā momo matua e whakamahia whānuitia ana, e hokona ana hoki i te mākete.
I runga i te wairewatanga, ka taea te wehewehe ki te ionic me te kore-ionic. Ko ngā ether cellulose kore-ionic wairewa-wai e rua ngā raupapa matua o ngā alkyl ether me ngā hydroxyalkyl ether. Ko te Cmc ionic e whakamahia ana i roto i ngā hopi hangai, te tā me te tae kakahu, te tūhuratanga kai me te hinu. Ko te mc kore-ionic, HPmc, HEmc, me ētahi atu e whakamahia ana i roto i ngā rauemi hanga, ngā paninga rapa, te rongoā, ngā matū o ia rā, me ētahi atu. Whakamahia hei whakamātotoru, hei pupuri wai, hei whakaū, hei whakamarara me te hei hanga kiriata.
Wā tuku: Whiringa-ā-rangi 24-2022