Ko te Carboxymethylcellulose (CMC) me te methylcellulose (MC) he mea hanga mai i te cellulose, he pūmua tūturu e kitea ana i roto i ngā pakitara pūtau o ngā tipu. He nui te whakamahinga o ēnei mea hanga i roto i ngā ahumahi maha nā ō rāua āhuatanga ahurei. Ahakoa he rite tonu, he rerekētanga motuhake te CMC me te MC i roto i ō rāua hanganga matū, āhuatanga, tono, me ngā whakamahinga ahumahi.
1. Hanganga Matū:
Carboxymethylcellulose (CMC):
Ka hangaia te CMC mā te whakaetere i te cellulose me te waikawa chloroacetic, ka hua ake te whakakapinga o ngā rōpū hydroxyl (-OH) i runga i te tuara o te cellulose ki ngā rōpū carboxymethyl (-CH2COOH).
Ko te taumata o te whakakapinga (DS) i roto i te CMC e pā ana ki te maha toharite o ngā rōpū carboxymethyl mō ia waeine hukahuka i roto i te mekameka cellulose. Mā tēnei tawhā ka whakatau i ngā āhuatanga o te CMC, tae atu ki te wairewatanga, te matotorutanga, me te whanonga rheological.
Mītirauro (MC):
Ka puta te MC mā te whakakapinga o ngā rōpū hydroxyl i roto i te cellulose ki ngā rōpū methyl (-CH3) mā te etherification.
Pērā i te CMC, ka awehia ngā āhuatanga o te MC e te nui o te whakakapinga, e whakatau ana i te whānuitanga o te methylation i te mekameka cellulose.
2. Te wairewatanga:
Carboxymethylcellulose (CMC):
Ka wairewa te CMC i roto i te wai, ā, ka puta he wairewa mārama, matotoru.
Ka whakawhirinaki tōna wairewatanga ki te pH, ā, he nui ake te wairewatanga i roto i ngā āhuatanga kawakore.
Mītirauro (MC):
Ka wairewa hoki te MC i roto i te wai, engari ka whakawhirinaki tōna wairewatanga ki te pāmahana.
Ina whakarewaina ki te wai matao, ka hangaia he kirikiri MC, ka memeha anō hoki ina whakamahanatia. Nā tēnei āhuatanga e pai ai mō ngā tono e hiahia ana kia whakahaeretia te kirikiri.
3. Te matotoru:
CMC:
He tino matotoru te wai i roto i ngā wairewa, ā, ka whai wāhi atu ki ōna āhuatanga whakamātotoru.
Ka taea te whakarerekē i tōna matotoru mā te whakarerekē i ngā āhuatanga pēnei i te kukū, te taumata o te whakakapinga, me te pH.
MC:
He rite te whanonga matotoru ki te CMC engari he iti ake te matotoru i te nuinga o te wā.
Ka taea hoki te whakahaere i te matotoru o ngā otinga MC mā te whakarerekē i ngā tawhā pēnei i te pāmahana me te kukū.
4. Te Hanga Kiriata:
CMC:
Ka hanga i ngā kiriata mārama, ngāwari ina whakarewaina mai i roto i ngā wairewa.
Ka kitea ngā tono o ēnei kiriata i roto i ngā ahumahi pēnei i te takai kai me ngā rongoā.
MC:
Ka taea hoki te hanga kiriata engari he pakarukaru ake i ngā kiriata CMC.
5. Ahumahi Kai:
CMC:
E whakamahia whānuitia ana hei whakau, hei whakamātotoru, hei whakaemulsifier hoki i roto i ngā hua kai pērā i te aihikirīmi, ngā ranu, me ngā ranu.
Nā tōna kaha ki te whakarerekē i te kakano me te āhua o te kai i roto i te waha, he mea nui tēnei i roto i ngā whakatakotoranga kai.
MC:
E whakamahia ana mō ngā kaupapa ōrite ki te CMC i roto i ngā hua kai, inā koa i roto i ngā tono e hiahia ana kia hangaia he ira me te pumau.
6. Rongoā:
CMC:
Whakamahia i roto i ngā whakatakotoranga rongoā hei here, hei wawahi, me te whakarerekē matotoru i roto i te hanga papa.
Ka whakamahia hoki i roto i ngā whakatakotoranga kiri pēnei i ngā kirīmi me ngā tiēre nā te mea he āhuatanga rheological tōna.
MC:
E whakamahia whānuitia ana hei whakamātotoru me te whakakī i ngā karu i roto i ngā rongoā, inā koa i roto i ngā rongoā wai ā-waha me ngā otinga kanohi.
7. Ngā Hua Tiaki Whaiaro:
CMC:
Kei roto i ngā taonga tiaki whaiaro pērā i te paraihe niho, te hopi horoi makawe, me ngā hinu whakangawari hei whakapūmau me te whakamātotoru.
MC:
E whakamahia ana i roto i ngā tono rite ki te CMC, e whai wāhi ana ki te kakano me te pumau o ngā whakatakotoranga tiaki whaiaro.
8. Ngā tono ahumahi:
CMC:
E whakamahia ana i roto i ngā ahumahi pēnei i te kakahu, te pepa, me te uku nā tōna kaha ki te mahi hei here, hei whakarerekē i te rheology, me te kaihopu wai.
MC:
E whakamahia ana i roto i ngā rauemi hanga, ngā peita, me ngā piripiri nā te mea he mātotoru, he here hoki ōna.
Ahakoa he momo matū te carboxymethylcellulose (CMC) me te methylcellulose (MC) he momo matū e ahu mai ana i te cellulose, he rerekē ngā āhuatanga o roto i ō rāua hanganga matū, ngā whanonga wairewa, ngā kōtaha matotoru, me ngā whakamahinga. He mea nui te mārama ki ēnei rerekētanga hei whiriwhiri i te momo matū e tika ana mō ngā whakamahinga motuhake i roto i ngā ahumahi rerekē, mai i te kai me te rongoā ki te tiaki whaiaro me ngā whakamahinga ahumahi. Ahakoa he hiahia mō te whakamātotoru pH-tairongo pērā i te CMC i roto i ngā hua kai, he kaihoko whakapūmau pāmahana-arotau pērā i te MC i roto i ngā hanganga rongoā, he painga ahurei kei ia momo matū e hāngai ana ki ngā whakaritenga motuhake i roto i ngā rāngai rerekē.
Wā tuku: Maehe-22-2024