Mā te whakamahi i te cellulose hei rauemi mata,CMC-Nai whakaritea mā te tikanga e rua ngā taahiraa. Ko te tuatahi ko te tukanga whakapūkara o te cellulose. Ka tauhohe te cellulose ki te hauwai konutai hei whakaputa i te cellulose kawakore, kātahi ka tauhohe te cellulose kawakore ki te waikawa chloroacetic hei whakaputa i te CMC-Na, e kiia nei ko te etherification.
Me whai kawakore te pūnaha tauhohenga. Nō te tikanga hanga etera Williamson tēnei tukanga. Ko te tikanga tauhohenga he whakakapinga nucleophilic. He kawakore te pūnaha tauhohenga, ā, ka haere tahi me ētahi tauhohenga taha i te aroaro o te wai, pērā i te konutai glycolate, te waikawa glycolic me ētahi atu hua taha. Nā te noho o ngā tauhohenga taha, ka piki ake te kai o te kawakore me te kaihoko etherification, ā, ka whakaiti i te whai huatanga o te etherification; I te wā kotahi, ka taea te whakaputa i te konutai glycolate, te waikawa glycolic me ētahi atu poke tote i roto i te tauhohenga taha, ka whakaiti i te parakore me te mahi o te hua. Hei pehi i ngā tauhohenga taha, me whakamahi noa i te kawakore, engari me whakahaere hoki i te nui o te pūnaha wai, te kukū o te kawakore me te tikanga whakaoho kia rawaka ai te kawakore. I te wa ano, me whai whakaaro ki ngā whakaritenga o te hua mō te matotoru me te tohu o te whakakapinga, me whai whakaaro whānui ki te tere me te pāmahana o te whakaoho. Ko te whakahaere me ētahi atu āhuatanga, ka whakanui ake i te tere o te etherification, ā, ka aukati i te putanga mai o ngā tauhohenga taha.
E ai ki ngā momo pāpāho whakaetere rerekē, ka taea te wehewehe i te hanga ahumahi o te CMC-Na kia rua ngā wāhanga: te tikanga wai-e hangai ana ki te wai me te tikanga whakarewa-e hangai ana ki te wai. Ko te tikanga e whakamahi ana i te wai hei reo tauhohenga ka kiia ko te tikanga wai-e hangai ana ki te wai, e whakamahia ana hei hanga reo kawakore me te CMC-Na iti-te-kounga. Ko te tikanga e whakamahi ana i te whakarewa waro hei reo tauhohenga ka kiia ko te tikanga whakarewa, e tika ana mō te hanga reo me te CMC-Na teitei-te-kounga. Ka mahia ēnei tauhohenga e rua i roto i te mīhini pokepoke, e pā ana ki te tukanga pokepoke, ā, koinei te tikanga matua mō te hanga CMC-Na i tēnei wā.
Tikanga reo wai：
Ko te tikanga wai-kawe he tukanga whakaputa ahumahi o mua, arā, ko te tauhohe i te cellulose alkali me te kaihoko etherification i raro i ngā tikanga o te alkali kore utu me te wai. I te wā o te alkaliization me te etherification, kāore he reo rauropi i roto i te pūnaha. He māmā noa ngā whakaritenga taputapu o te tikanga wai-kawe, he iti ake te haumi me te iti o te utu. Ko te ngoikoretanga ko te kore o te nui o te reo wai, ko te wera e puta mai ana i te tauhohenga ka whakanui ake i te pāmahana, ka tere ake te tere o ngā tauhohenga taha, ka iti te whai huatanga o te etherification, me te kounga hua ngoikore. Ka whakamahia te tikanga hei whakarite i ngā hua CMC-Na reo-waenga me te iti-kounga, pērā i ngā hopi horoi, ngā kaihoko rahi kakahu me ērā atu mea.
Tikanga whakarewa：
Ko te tikanga whakarewa e kiia ana ko te tikanga whakarewa waro, ā, ko tōna āhuatanga matua ko te whakahaere i ngā tauhohenga alkaliization me te etherification i raro i te tikanga o te whakarewa waro hei reo tauhohenga (diluent). E ai ki te nui o te diluent tauhohenga, ka wehea ki te tikanga pokepoke me te tikanga para. He rite tonu te tikanga whakarewa ki te tukanga tauhohenga o te tikanga wai, ā, e rua ngā wāhanga o te alkaliization me te etherification, engari he rerekē te reo tauhohenga o ēnei wāhanga e rua. Ka penapenahia e te tikanga whakarewa te tukanga o te rumaki alkali, te pēhi, te kuru, te koroheketanga me ētahi atu mea kei roto i te tikanga wai, ā, ka mahia te alkaliization me te etherification i roto i te mīhini pokepoke. Ko te ngoikoretanga he iti te kaha ki te whakahaere i te pāmahana, ā, he nui te wāhi me te utu e hiahiatia ana. Ko te tikanga, mō te hanga i ngā whakatakotoranga taputapu rerekē, me tino whakahaere te pāmahana pūnaha, te wā whāngai, me ētahi atu, kia taea ai te whakarite hua he kounga me te mahi tino pai.
Wā tuku: Paenga-whāwhā-25-2024