Kugadzira pure cellulose ethers kunosanganisira matanho akati wandei, kutanga kubva pakutorwa kwe cellulose kubva mumidziyo yechirimwa kuenda kumakemikari ekugadzirisa maitiro.
Cellulose Sourcing: Cellulose, polysaccharide inowanikwa musero madziro ezvirimwa, inoshanda seyakagadziriswa ye cellulose ethers. Zvinowanzowanikwa zvinosanganisira huni pulp, donje, uye zvimwe zvirimwa zvine fibrous sejute kana hemp.
Pulping: Pulping ndiyo nzira yekuparadzanisa mafiibhi e cellulose kubva kune chirimwa. Izvi zvinowanzoitika kuburikidza nemakanika kana makemikari nzira. Mechanical pulping inosanganisira kukuya kana kunatsa zvinhu kuti zviparadzanise fiber, nepo kemikari pulping, senge kraft process, inoshandisa makemikari sesodium hydroxide uye sodium sulfide kunyungudutsa lignin uye hemicellulose, ichisiya cellulose kumashure.
Bleaching (Inosarudzika): Kana kuchena kwakanyanya kuchidikanwa, iyo cellulose pulp inogona kuita bleaching process kuti ibvise chero yasara lignin, hemicellulose, uye mamwe matsvina. Chlorine dioxide, hydrogen peroxide, kana okisijeni ndiwo akajairika maejeshi anoshandiswa padanho iri.
Activation: Cellulose ethers inowanzogadzirwa nekuita serulosi nealkali metal hydroxides kuita alkali cellulose yepakati. Iyi nhanho inosanganisira kuzvimba iyo cellulose fiber mumhinduro ye sodium hydroxide kana potassium hydroxide pane yakakwirira tembiricha. Iyi activation nhanho inoita kuti cellulose iwedzere kuita kune etherification.
Etherification: Etherification inhanho yakakosha mukugadzira cellulose ethers. Zvinosanganisira kuunza mapoka eether (akadai semethyl, ethyl, hydroxyethyl, kana hydroxypropyl mapoka) pane cellulose musana. Kuita uku kunowanzoitwa nekurapa alkali cellulose ine etherifying agents sealkyl halides (semuenzaniso, methyl chloride yemethyl cellulose), alkylene oxides (semuenzaniso, ethylene oxide yehydroxyethyl cellulose), kana alkyl halohydrins (semuenzaniso, propylene oxide yehydroxypropyl cellulose. ) pasi pemamiriro ekudzora tembiricha, kudzvanywa, uye pH.
Neutralization uye Washing: Mushure me etherification, musanganiswa wekuita haugadziriswi kubvisa yakawandisa alkali. Izvi zvinowanzoitwa nekuwedzera asidhi, yakadai sehydrochloric acid kana sulfuric acid, kuderedza alkali uye kuderedza cellulose ether. Chigadzirwa chacho chinogezwa nemvura kubvisa chero makemikari akasara uye ne-zvigadzirwa.
Kuomesa: Iyo yakagezwa cellulose ether chigadzirwa chinowanzoomeswa kubvisa hunyoro hwakawandisa uye kuwana yekupedzisira yehupfu kana granular fomu. Izvi zvinogona kuitwa uchishandisa hunyanzvi hwakadai sekuomesa mhepo, vacuum drying, kana kupfapfaidza kuomesa.
Kudzora Hunhu: Matanho ekudzora emhando akakosha kuti ive nechokwadi chekuchena, kuwirirana, uye zvinodiwa zveiyo cellulose ethers. Izvi zvinosanganisira kuyedza chigadzirwa chema parameter senge dhigirii rekutsiva, viscosity, particle size kugovera, hunyoro hwemukati, uye kuchena uchishandisa hunyanzvi hwekuongorora senge titration, viscometry, uye spectroscopy.
Kurongedza uye Kuchengeta: Kana cellulose ethers dzaomeswa uye nekuongororwa kwemhando, dzinoiswa mumidziyo yakakodzera uye dzinochengetwa pasi pemamiriro ekudzivirira kudzivirira kukwira kwehunyoro uye kuderera. Kunyora kwakaringana uye zvinyorwa zvebatch zvinyorwa zvakakoshawo pakuteedzera uye kutevedza kwemitemo.
Nekutevera nhanho idzi, zvinogoneka kugadzira pure cellulose ether neinodiwa zvivakwa zveakasiyana maindasitiri ekushandisa, kusanganisira mishonga, chikafu, zvekuzora, machira, uye zvekuvakisa.
Nguva yekutumira: Kubvumbi-24-2024