Cellulose ethers zvinhu zvinoshandiswa zvakasiyana-siyana mumaindasitiri akasiyana-siyana anosanganisira kuvaka, mishonga uye chikafu. Maitiro ekugadzira cellulose ether akaomarara, ane matanho akawanda, uye anoda hunyanzvi hwakawanda uye michina yakakosha. Muchinyorwa chino, tichakurukura zvakadzama maitiro ekugadzira cellulose ethers.
Danho rekutanga mukugadzirwa kwe cellulose ether kugadzirira zvinhu zvisina kugadzirwa. Zvinhu zvinoshandiswa kugadzira cellulose ethers zvinowanzobva mu pulp yehuni nedonje rakarasika. Purple yehuni inochekwa-chekwa uye inovharwa kuti ibvise marara makuru, ukuwo marara edonje achigadziriswa kuita pulp yakanaka. Purple inozoderedzwa saizi nekukuya kuti pave nehupfu hwakatsetseka. Purple yehuni yakasanganiswa nedonje rakarasika zvinozosanganiswa pamwe chete muhuwandu hwakatarwa zvichienderana nehunhu hwechigadzirwa chekupedzisira.
Danho rinotevera rinosanganisira kugadzirisa mishonga yekudya kwakasanganiswa. Pulp inotanga yabatwa nealkaline solution (kazhinji sodium hydroxide) kuti iparadze chimiro che fibrous che cellulose. Cellulose inozobatwa ne solvent yakaita se carbon disulfide kuti igadzire cellulose xanthate. Kurapa uku kunoitwa mumatangi ane pulp inogara iripo. Cellulose xanthate solution inozoburitswa kuburikidza ne extrusion device kuti igadzire filaments.
Mushure mezvo, shinda dze cellulose xanthate dzakarukwa mubhavhu rine diluted sulfuric acid. Izvi zvinoguma nekugadziriswazve kwecheni dze cellulose xanthate, zvichigadzira cellulose fibers. Nyuzi dze cellulose dzakagadzirwa dzinozosukwa nemvura kubvisa tsvina isati yacheneswa. Maitiro ekucheneswa anoshandisa hydrogen peroxide kucheneswa kweshinda dze cellulose, idzo dzinozosukwa nemvura dzosiyiwa kuti dziome.
Mushure mekunge fiber dze cellulose dzaoma, dzinoitwa nenzira inonzi etherification. Maitiro e etherification anosanganisira kuiswa kwemapoka e ether, akadai se methyl, ethyl kana hydroxyethyl groups, muma fiber e cellulose. Nzira iyi inoitwa uchishandisa reaction ye etherification agent uye acid catalyst pamberi pe solvent. Reactions dzinowanzoitwa pasi pemamiriro ekupisa nekumanikidzwa kwakanyatsorongeka kuti ive nechokwadi chekuti chigadzirwa chinobuda zvakanaka uye chakachena.
Panguva iyi, cellulose ether yaive muchimiro cheupfu chena. Chigadzirwa chapera chinozoongororwa kuti chive nechokwadi chekuti chigadzirwa chinosangana nezvaunoda uye zvinodiwa, zvakaita sekupenya, kuchena kwechigadzirwa uye hunyoro. Chinozoiswa mupakeji uye chinotumirwa kumushandisi wekupedzisira.
Mukupfupisa, maitiro ekugadzira cellulose ether anosanganisira kugadzirira zvinhu zvisina kugadzirwa, kurapwa nemakemikari, kutenderera, kuchena uye kupiswa kwemvura, zvichiteverwa nekuyedzwa kwekudzora mhando. Maitiro ese anoda michina yakasarudzika uye ruzivo rwekuita kwemakemikari uye anoitwa mumamiriro ezvinhu akagadziriswa zvakanyanya. Kugadzira cellulose ethers inzira yakaoma uye inotora nguva, asi inokosha mumaindasitiri mazhinji.
Nguva yekutumira: Chikumi-21-2023