I te nuinga o te wā, i roto i te hanganga ohydroxypropyl methylcellulose, ka rongoatia te miro cellulose kua whakapaia ki te otinga alkali i te 35-40°C mō te hawhe haora, ka pēhia, ka hurihia te cellulose, ā, ka pakeke tika i te 35°C, kia rite te nekehanga polymerization o ngā muka alkali i whiwhi ki roto i te awhe e hiahiatia ana. Tāpirihia te muka alkali ki roto i te ipu etherification, tāpirihia te propylene oxide me te methyl chloride, ka etherify i te 50-80 ℃ mō te 5 haora ki te pēhanga teitei o te 1.8 MPa. Kātahi ka tāpirihia he nui e tika ana o te waikawa hydrochloric me te waikawa oxalic ki te wai wera i te 90°C hei horoi i te rauemi kia whānui ake te rōrahi. Whakamarokehia ki te centrifuge. Horoia kia kore e pā, ina iti iho i te 60% te nui o te wai i roto i te rauemi, whakamarokehia ki te hau wera i te 130°C ki raro iho i te 5%.
Te Whakapūmautanga: I muri i te whakatuwheratanga, ka tāpirihia te paura miro kua whakamaroketia ki roto i te whakarewa kore mahi, ā, ka whakahohehia ki te kawakawa me te wai ngohengohe hei pupuhi i te whatunga tioata o te miro kua whakamaroketia, he mea e pai ai te urunga o ngā ngota matū whakapūmau, ā, ka whakapai ake i te ōritetanga o te tauhohenga whakapūmautanga. Ko te kawakawa e whakamahia ana i roto i te whakapūmautanga he hauwaiora konganuku, he turanga rauropi rānei. Ko te nui o te kawakawa i tāpirihia (mā te taumaha, koia anō i raro nei) he 0.1-0.6 ngā wā o te miro kua whakamaroketia, ā, ko te nui o te wai ngohengohe he 0.3-1.0 ngā wā o te miro kua whakamaroketia; ko te whakarewa kore mahi he ranunga waipiro me te hauwaiora, ā, ko te nui o te whakarewa kore mahi i tāpirihia he miro kua whakamaroketia. 7-15 ngā wā: ka taea hoki e te whakarewa kore mahi te waipiro me te 3-5 ngā ngota waro (pēnei i te waipiro, te propanol), te acetone. Ka taea hoki e ngā hauwaiora aliphatic me ngā hauwaiora kakara; me whakahaere te pāmahana i roto i te 0-35°C i te wā o te whakapūmautanga; ko te wā whakapūmautanga he 1 hāora pea. Ka taea te whakatau i te whakatikatika o te pāmahana me te wā i runga i ngā whakaritenga o te rauemi me te hua.
Whakapūngao: Whai muri i te maimoatanga whakapūngao, i raro i ngā āhuatanga korehau, ka whakahaerehia te whakapūngao mā te tāpiri i tētahi kaihoko whakapūngao, ā, ko te kaihoko whakapūngao ko te propylene oxide. Hei whakaiti i te whakamahinga o te kaihoko whakapūngao, i tāpirihia te kaihoko whakapūngao kia rua ngā wā i te tukanga whakapūngao.
Wā tuku: 28 Paenga-whāwhā 2024