Kufambiswa kwechiedza kwehydroxypropyl methylcellulose kunonyanya kukanganiswa nezvinhu zvinotevera:
1. Hunhu hwezvinhu zvakagadzirwa.
Chechipiri, mhedzisiro ye alkaliization.
3. Chiyero chemaitiro
4. Chikamu che solvent
5. Mhedzisiro yekusagadzikana
Zvimwe zvigadzirwa zvinenge zvakakora semukaka mushure mekunyungudutswa, zvimwe zvichena semukaka, zvimwe zvakatsvuka, uye zvimwe zvakajeka uye zvinoonekera… Kuti ugadzirise dambudziko iri, gadzirisa kubva pane zvinotevera. Dzimwe nguva acetic acid inogona kukanganisa zvakanyanya kufambiswa kwechiedza. Zvakanakisisa kushandisa acetic acid mushure mekunyungudutswa. Chinhu chikuru ndechekuti reaction yacho yakamutswa zvakaenzana here uye kana system ratio yakagadzikana (zvimwe zvinhu zvine hunyoro uye zviri mukati hazvina kugadzikana, senge solvent inoshandiswa kudzokorodza). Kutaura zvazviri, pane zvinhu zvakawanda zviri kukanganisa. Kana michina yakagadzikana uye vashandisi vakadzidziswa zvakanaka, kugadzirwa kwayo kunofanira kunge kwakasimba kwazvo. Kufambiswa kwechiedza hakuzopfuuri huwandu hwe±2%, uye kufanana kwekuchinjana kwemapoka ekuchinja kunofanira kudzorwa zvakanaka. Panzvimbo pekufanana, kufambiswa kwechiedza kwaizova kwakanaka.
Zvinhu Zvinokanganisa Kusviba kweHydroxypropyl Methyl Cellulose
Hydroxypropyl methylcellulose ine viscosity yakakura haigone kugadzira cellulose yakawanda nekungoshandisa vacuum cleaner uye kutsiva nitrogen mukugadzirwa. Kazhinji, kugadzirwa kwecellulose ine viscosity yakakura muChina hakugone kudzorwa. Zvisinei, kana mudziyo wekuyera oxygen shoma ukaiswa muketero, kugadzirwa kwe viscosity yayo kunogona kudzorwa nemaoko.
yakagadzirwa. Pamusoro pezvo, tichifunga nezvekumhanya kwekutsiva nitrogen, zviri nyore kugadzira zvigadzirwa zvine viscosity yakanyanya zvisinei nekuti system yacho haina mhepo yakawanda sei. Ehe, mwero wepolymerization yedonje rakanatswa wakakoshawo. Kana izvozvo zvikasashanda, saka ita ne hydrophobic association. Kune ma association agents munzvimbo iyi muChina. Rudzi rwe association agent yekusarudza ine simba guru pakushanda kwechigadzirwa chekupedzisira. Okisijeni yakasara mu reactor inokonzera kuora kwe cellulose uye kudzikira kwehuremu hwemamorekuru, asi residual oxygen ine muganho, chero bedzi mamorekuru akaputsika akabatanazve, hazvina kuoma kugadzira high viscosity. Zvisinei, saturation rate ine zvakawanda zvekuita nehuwandu hwe hydroxypropyl. Mamwe mafekitori anongoda kuderedza mutengo nemutengo, asi haadi kuwedzera huwandu hwe hydroxypropyl, saka mhando haigone kusvika padanho rezvigadzirwa zvakafanana zvekunze. Water retention rate yechigadzirwa ine hukama hwakanaka ne hydroxypropyl, asi kune rese reaction process, inosarudzawo mvura yayo retention rate, alkaliization effect, ratio ye methyl chloride ne propylene oxide, alkali concentration uye water retention. Chiyero chedonje rakanatswa ndicho chinosarudza mashandiro echigadzirwa.
Nguva yekutumira: Chivabvu-23-2023