Carboxymethyl cellulose:
Ioniccellulose etherinogadzirwa kubva kune yakasikwa fibers (donje, nezvimwewo) mushure mekurapwa kwealkali, uchishandisa sodium monochloroacetate se etherification agent, uye ichiitwa nhevedzano yemaitiro ekurapwa. Dhigirii rekutsiva kazhinji 0.4 ~ 1.4, uye kuita kwayo kunokanganisa zvakanyanya nedhigirii rekutsiva.
(1) Carboxymethyl cellulose inowedzera hygroscopic, uye ichange iine mvura yakawanda kana yakachengetwa pasi pemamiriro ezvinhu.
(2) Carboxymethyl cellulose aqueous solution haiburitse gel, uye viscosity inoderera nekuwedzera kwekushisa. Kana tembiricha inopfuura 50 ° C, viscosity haidzoreki.
(3) Kugadzikana kwayo kunokanganisa zvakanyanya nePH. Kazhinji, inogona kushandiswa mune gypsum-based mortar, asi kwete musimende-based mortar. Kana yakanyanya alkaline, inorasikirwa neviscosity.
(4) Kuchengetwa kwayo kwemvura kwakadzikira zvakanyanya kupfuura kwemethyl cellulose. Iyo ine mhedzisiro yekudzosera pane gypsum-based mortar uye inoderedza simba rayo. Nekudaro, mutengo wecarboxymethyl cellulose wakadzikira zvakanyanya pane wemethyl cellulose.
Cellulose alkyl ether:
Vanomiririra ndivo methyl cellulose uye ethyl cellulose. Mukugadzirwa kwemaindasitiri, methyl chloride kana ethyl chloride inowanzo shandiswa se etherification agent, uye maitiro anotevera:
Mune fomula, R inomiririra CH3 kana C2H5. Alkali concentration haingokanganisa dhigirii re etherification, asi inokanganisawo kushandiswa kwealkyl halides. Iyo yakaderera iyo alkali concentration, yakasimba iyo hydrolysis yealkyl halide. Kuti uderedze kushandiswa kweetherifying agent, iyo alkali concentration inofanira kuwedzerwa. Nekudaro, kana iyo alkali concentration yakawandisa, kuzvimba kwe cellulose kunodzikira, izvo zvisingaite kune etherification reaction, uye dhigirii reetherification rinoderedzwa. Nechinangwa ichi, yakadzika lye kana yakasimba lye inogona kuwedzerwa panguva yekuita. Iyo reactor inofanira kuva yakanaka inomutsa uye kubvarura mudziyo kuitira kuti alkali igovane zvakaenzana.
Methyl cellulose inoshandiswa zvakanyanya se thickener, adhesive uye inodzivirira colloid etc. Inogonawo kushandiswa se dispersant ye emulsion polymerization, bonding dispersant yembeu, textile slurry, additive yezvokudya uye zvizorwa, mushonga wezvokurapa, mushonga wekuputira zvinodhaka, uye nokuda kwependi yelatex, kudhinda nguva yekugadzira, kudhinda uye kusanganiswa kwependi yelatex, kudhinda nguva yekugadzira uye kusanganiswa kwekugadzirwa kweceramic. simba rekutanga, etc.
Ethyl cellulose zvigadzirwa zvine yakakwira mechanic simba, kuchinjika, kudzivirira kupisa uye kutonhora kupikisa. Low-substituted ethyl cellulose inonyungudika mumvura uye inonyungudutsa alkaline mhinduro, uye zvigadzirwa zvakatsiviwa zvakanyanya zvinonyungudika mune zvakawanda organic solvents. Iine kuwirirana kwakanaka neakasiyana-siyana resin uye plasticizers. Inogona kushandiswa kugadzira mapurasitiki, mafirimu, varnishes, adhesives, latex uye coating zvinhu zvemishonga, nezvimwewo.
Kuiswa kwemapoka e-hydroxyalkyl mu cellulose alkyl ethers kunogona kuvandudza kunyungudika kwayo, kuderedza kunzwisisika kwayo kune salting kunze, kuwedzera kutonhora kwegelation uye kunatsiridza kupisa kunopisa zvinhu, nezvimwewo.
Cellulose hydroxyalkyl ether:
Vanomiririra ndivo hydroxyethyl cellulose uye hydroxypropyl cellulose. Etherifying agents maepoksidhi akadai se ethylene oxide uye propylene oxide. Shandisa acid kana base se catalyst. Kugadzirwa kwemaindasitiri ndiko kuita alkali cellulose ine etherification agent: hydroxyethyl cellulose ine high substitution value inonyungudika mumvura inotonhora nemvura inopisa. Hydroxypropyl cellulose ine high substitution value inonyungudika chete mumvura inotonhora asi kwete mumvura inopisa. Hydroxyethyl cellulose inogona kushandiswa seyakakora yemucheka we latex, kudhinda machira uye dhayi paste, mapepa saizi zvinhu, zvinonamira uye zvinodzivirira colloids. Kushandiswa kwehydroxypropyl cellulose kwakafanana neiyo hydroxyethyl cellulose. Hydroxypropyl cellulose ine low substitution value inogona kushandiswa semushonga wemishonga, unogona kuva nezvose zvinosunga nekuparadza.
Carboxymethylcellulose, yakapfupikiswa seCMC, kazhinji inowanikwa muchimiro chesodium munyu. Iyo etherifying agent ndeye monochloroacetic acid, uye maitiro ndeaya anotevera:
Carboxymethyl cellulose ndiyo inonyanya kushandiswa mumvura-soluble cellulose ether. Munguva yakapfuura, yainyanya kushandiswa sekuchera madhaka, asi ikozvino yakawedzerwa kuti ishandiswe sekuwedzera kwe detergent, zvipfeko slurry, latex pendi, kupfekedza makadhibhodi uye mapepa, etc. Pure carboxymethyl cellulose inogona kushandiswa muzvokudya, mishonga, zvizoro, uyewo sechinhu chinonamatira chekeramics uye molds.
Polyanionic cellulose (PAC) ioniccellulose etheruye ndeyepamusoro-yekupedzisira inotsiva chigadzirwa che carboxymethyl cellulose (CMC). Ichena, isina-chena kana zvishoma yero poda kana granule, isiri-chepfu, isinganakidze, inonyungudika nyore mumvura, ichigadzira mhinduro yakajeka ine imwe viscosity, ine zviri nani kupisa kupisa kugadzikana uye munyu kuramba, uye yakasimba antibacterial properties. Hapana mildew uye kuora. Iine maitiro ekuchena kwepamusoro, dhigirii yepamusoro yekutsiva, uye kugovera kwakafanana kwezvinotsiva. Inogona kushandiswa se binder, thickener, rheology modifier, fluid loss reducer, suspension stabilizer, etc. Polyanionic cellulose (PAC) inoshandiswa zvakanyanya mumaindasitiri ose ayo CMC inogona kushandiswa, iyo inogona kuderedza zvakanyanya dhigirii, kuita kuti kushandiswa, kupa kugadzikana kuri nani uye kusangana nepamusoro pekuita zvinodiwa.
Cyanoethyl cellulose ndiyo inoita chigadzirwa che cellulose uye acrylonitrile pasi pe catalysis ye alkali:
Cyanoethyl cellulose ine yakakwira dielectric inogara uye yakaderera kurasikirwa coefficient uye inogona kushandiswa seresin matrix yephosphor uye electroluminescent mwenje. Yakaderera-inotsiva cyanoethyl cellulose inogona kushandiswa sepa insulating bepa re transformer.
Mafuta epamusoro edoro ethers, alkenyl ethers, uye anonhuwirira doro ether e cellulose akagadzirwa, asi haana kushandiswa mukuita.
Nzira dzekugadzirira dze cellulose ether dzinogona kukamurwa kuita mvura yepakati nzira, solvent method, kneading method, slurry method, gas-solid method, liquid phase method uye kusanganiswa kwenzira dziri pamusoro.
Nguva yekutumira: Kubvumbi-28-2024