4 Hangarau Hanganga Taketake me nga tauira o HPMC, Kaua e ngaro!

Ko te Hydroxypropyl methylcellulose (HPMC) he polymer maha e whakamahia nuitia ana i roto i nga momo ahumahi, tae atu ki te hangahanga, te rongoa, me nga umanga kai.Ka hangaia te HPMC ma te whakamahi i nga momo hangarau whakangao me nga whakatakotoranga, i runga i te tono e hiahiatia ana.I roto i tenei tuhinga, ka tirotirohia e wha nga hangarau hanga taketake me nga tauira o te HPMC kia kaua e ngaro.

1. Hangarau Whakawhanaunga Ko te hangarau etherification ko te hangarau whakangao tino whakamahia mo HPMC.I roto i tenei tukanga, ka tukuna te cellulose ki te kawakore, penei i te konutai waikawa, hei hanga i te cellulose alkali.Ka tauhohehia te cellulose alkali ki te propylene oxide me te methyl chloride hei hanga HPMC.Ko te tohu whakakapinga (DS) o te HPMC ka taea te whakahaere ma te whakatika i te ōwehenga o te propylene oxide ki te methyl chloride i te wa o te tauhohenga.

Ko te tauira mo te HPMC i hangaia ma te whakamahi i te hangarau etherification ko:

Cellulose + Alkali → Alkali Cellulose Alkali Cellulose + Propylene Oxide + Methyl Chloride → HPMC

2. Hangarau Whakamakuku Rehu Ko te hangarau whakamaroke rehu he hangarau hanga matatau ake mo HPMC.I roto i tenei tukanga, ka memeha te cellulose ki roto i te wairewa kawakore ka tauhohe ki te propylene oxide me te methyl chloride.Ko te otinga o te otinga HPMC ka rehu kia whakamarokehia hei whakaputa i te paura HPMC.

Ko te tauira mo te HPMC i hangaia ma te hangarau whakamaroke rehu ko:

Cellulose + Alkali → Alkali Cellulose Alkali Cellulose + Propylene Oxide + Methyl Chloride → HPMC Solution HPMC Solution + Spray Drying → HPMC Powder

3. Hangarau Whakatarewa Polymerization Ko te hangarau whakatara polymerization tetahi atu hangarau hanga mo HPMC.I roto i tenei tukanga, ka whakatarewahia te cellulose i roto i te whakarewa, ka tauhohe ki te propylene oxide me te methyl chloride i te aroaro o te kaikawe polymerization hei hanga HPMC.

Ko te tauira mo te HPMC i hangaia ma te whakamahi i te hangarau polymerization whakatārewatanga ko:

Cellulose + Solvent + Polymerization Initiator → Cellulose Suspension Cellulose Suspension + Propylene Oxide + Methyl Chloride → HPMC

4. Hangarau Hangarau Whakaraupapa Ko te hangarau whakakorikori otinga he hangarau hanga hou mo HPMC.I roto i tenei tukanga, ka rewa te cellulose i roto i te whakarewa, ka tauhohe ki te propylene oxide me te methyl chloride i te aroaro o te kaikawe polymerization hei hanga HPMC.

Ko te tauira mo te HPMC i hangaia ma te hangarau polymerization otinga ko:

Cellulose + Solvent + Polymerization Initiator → Cellulose Solution Cellulose Solution + Propylene Oxide + Methyl Chloride → HPMC

Hei mutunga, ko te HPMC he polymer maha ka hangaia ma te whakamahi i nga momo hangarau whakangao me nga hangahanga, i runga ano i te tono e hiahiatia ana.Ko nga hangarau hanga taketake e wha me nga tauira o te HPMC ko te hangarau etherification, te hangarau whakamaroke rehu, te hangarau polymerization whakatārewa, me te hangarau polymerization otinga.Ma te mohio ki te hangarau whakangao me te tauira o te HPMC ka awhina nga kaihanga ki te whiriwhiri i te hua HPMC tika mo o raatau tono.