Te whakarite i ngā etera cellulose

Te whakarite ongā etera celluloseKo te whakarerekētanga matū o te cellulose polymer tūturu mā roto i ngā tauhohenga etherification. Ka whakaurua e tēnei tukanga ngā rōpū ether ki ngā rōpū hydroxyl o te mekameka polymer cellulose, ka hua ake ai te hanganga o ngā ether cellulose me ngā āhuatanga ahurei. Ko ngā ether cellulose tino noa ko te Hydroxypropyl Methylcellulose (HPMC), te Carboxymethyl Cellulose (CMC), te Hydroxyethyl Cellulose (HEC), te Methyl Cellulose (MC), me te Ethyl Cellulose (EC). Anei tētahi tirohanga whānui o te tukanga whakarite:

1. Te Pūtake Cellulose:

• Ka tīmata te tukanga mā te kimi i te cellulose, he mea hanga mai i te penupenu rakau, i te miro rānei. Ka pā te whiriwhiri i te pūtake cellulose ki ngā āhuatanga o te hua cellulose ether whakamutunga.

2. Te whakapūpū:

• Ka tukuna te cellulose ki roto i ngā tukanga penupenu hei wawahi i ngā muka kia ngāwari ake te whakahaere. Tērā pea ka uru atu ki tēnei ngā tikanga penupenu ā-ringa, ā-matū rānei.

3. Te Whakama:

• Ka purea te cellulose hei tango i ngā poke, te lignin, me ētahi atu wāhanga kore-cellulose. He mea nui tēnei mahi purenga hei whiwhi i tētahi rauemi cellulose kounga teitei.

4. Tauhohenga Whakapūngao:

• Ka whakaeterehia te cellulose kua purea, ka whakaurua ngā rōpū etera ki ngā rōpū hydroxyl i runga i te mekameka polymer cellulose. Ko te kōwhiringa o te kaihoko whakaetere me ngā āhuatanga tauhohenga ka whakawhirinaki ki te hua etera cellulose e hiahiatia ana.
• Ko ngā kai etherifying noa ko te ethylene oxide, te propylene oxide, te sodium chloroacetate, te methyl chloride, me ētahi atu.

5. Te Whakahaere i ngā Tawhā Tauhohenga:

• Ka āta whakahaerehia te tauhohenga etherification e pā ana ki te pāmahana, te pēhanga, me te pH kia tutuki ai te taumata whakakapinga e hiahiatia ana (DS) me te karo i ngā tauhohenga taha.
• He maha ngā wā ka whakamahia ngā tikanga kawakore, ā, ka aro turukihia hoki te pH o te ranunga tauhohenga.

6. Te Whakakore me te Horoi:

• I muri i te tauhohenga whakaetere, ka whakakorengia te hua hei tango i ngā matū me ngā hua taha. Whai muri i tēnei mahi ka horoia pai hei tango i ngā matū me ngā poke e toe ana.

7. Te whakamaroke:

• Ka whakamarokehia te cellulose kua purea, kua whakaeterehia kia puta ai te hua cellulose ether whakamutunga i roto i te ahua paura, i te ahua kirikiri rānei.

8. Mana Kounga:

• He maha ngā tikanga tātari e whakamahia ana mō te whakahaere kounga, tae atu ki te ine i te aukume aukume karihi (NMR), te ine i te pūwero Fourier-transform (FTIR), me te chromatography.
• Ko te nui o te whakakapinga (DS) he tawhā nui e aroturukitia ana i te wā whakaputa hei whakarite i te ōritetanga.

9. Te Hanga me te Tākai:

• Kātahi ka hangaia te cellulose ether ki ngā momo taumata rerekē hei whakatutuki i ngā whakaritenga motuhake o ngā tono rerekē. Ka tākaihia ngā hua whakamutunga hei tohatoha.

He tukanga matū uaua te whakarite i ngā etera cellulose e hiahia ana kia āta whakahaeretia ngā āhuatanga tauhohenga kia tutuki ai ngā āhuatanga e hiahiatia ana. Nā te maha o ngā whakamahinga o ngā etera cellulose ka taea te whakamahi i roto i te whānuitanga o ngā tono puta noa i ngā ahumahi, tae atu ki ngā rongoā, te kai, te hanga, ngā paninga, me ētahi atu.