Hanganga matū o ngā matū etera cellulose

Ko ngā cellulose ethers he mea hanga mai i te cellulose, he polysaccharide tūturu e kitea ana i roto i ngā pakitara pūtau o ngā tipu. Ko te hanganga matū o ngā cellulose e tohuhia ana e te whakaurunga o ngā momo rōpū ether mā te whakarerekētanga matū o ngā rōpū hydroxyl (-OH) kei roto i te ngota cellulose. Ko ngā momo cellulose ethers tino noa ko:

1. Te Waipiroporoporo Mītirau (HPMC):
   • Hanganga:
     • Ka hangaia te HPMC mā te whakakapi i ngā rōpū hydroxyl o te cellulose ki ngā rōpū hydroxypropyl (-OCH2CHOHCH3) me te methyl (-OCH3).
     • Ko te tohu o te whakakapinga (DS) e tohu ana i te toharite o ngā rōpū hydroxyl kua whakakapia mō ia waeine hukahuka i roto i te mekameka cellulose.
2. Carboxymethyl Cellulose(CMC):
   • Hanganga:
     • Ka puta te CMC mā te whakauru i ngā rōpū carboxymethyl (-CH2COOH) ki ngā rōpū hydroxyl o te cellulose.
     • Mā ngā rōpū carboxymethyl ka wairewa te mekameka cellulose, ka puta hoki te āhua anionic.
3. Te Pūtauora Waikawaetere (HEC):
   • Hanganga:
     • Ka ahu mai te HEC mā te whakakapi i ngā rōpū hydroxyl o te cellulose ki ngā rōpū hydroxyethyl (-OCH2CH2OH).
     • He pai ake te wairewatanga ki te wai me te whakamātotoru.
4. Metila Hūrouro (MC):
   • Hanganga:
     • Ka puta te MC mā te whakauru i ngā rōpū methyl (-OCH3) ki ngā rōpū hydroxyl o te cellulose.
     • E whakamahia whānuitia ana mō ōna āhuatanga pupuri wai me te hanga kiriata.
5. Te Etilo o te Pūtau (EC):
   • Hanganga:
     • Ka hangaia te EC mā te whakakapi i ngā rōpū hydroxyl o te cellulose ki ngā rōpū ethyl (-OC2H5).
     • E mōhiotia ana mō tōna kore e wairewa i roto i te wai, ā, e whakamahia pinepine ana i roto i te hanga paninga me ngā kiriata.
6. Te Pūtauroporo Waikawa (HPC):
   • Hanganga:
     • Ka ahu mai te HPC mā te whakauru i ngā rōpū hydroxypropyl (-OCH2CHOHCH3) ki ngā rōpū hydroxyl o te cellulose.
     • E whakamahia ana hei here, hei hanga kiriata, hei whakarerekē matotoru hoki.

He rerekē te hanganga motuhake mō ia pūhui cellulose ether i runga i te momo me te nui o te whakakapinga i whakaurua i te wā o te tukanga whakarerekētanga matū. Mā te whakaurunga o ēnei rōpū ether ka whakawhiwhia ngā āhuatanga motuhake ki ia cellulose ether, ka pai ai mō ngā tono ahumahi rerekē.