Carboxymethyl cellulose:
Ionicether ye celluloseInogadzirwa neshinda dzechisikigo (donje, nezvimwewo) mushure mekurapwa nealkali, ichishandisa sodium monochloroacetate se etherification agent, uye ichirapwa kakawanda. Dhigirii rekutsiva rinowanzova 0.4 ~ 1.4, uye mashandiro aro anokanganiswa zvakanyanya nehuwandu hwekutsiva.
(1) Carboxymethyl cellulose inonyanya kuchena, uye ine mvura yakawanda kana ikachengetwa mumamiriro ezvinhu akajairwa.
(2) Carboxymethyl cellulose aqueous solution haiburitse gel, uye viscosity inoderera nekuwedzera kwekupisa. Kana tembiricha ikapfuura 50°C, viscosity haidzoreki.
(3) Kugadzikana kwayo kunokanganiswa zvakanyanya nePH. Kazhinji, inogona kushandiswa mumota yakagadzirwa negypsum, asi kwete mumota yakagadzirwa nesimende. Kana iine alkaline yakawanda, inorasikirwa ne viscosity.
(4) Kuchengetwa kwayo kwemvura kwakaderera zvikuru pane kwemethyl cellulose. Ine simba rekunonoka pamota yakagadzirwa negypsum uye inoderedza simba rayo. Zvisinei, mutengo wecarboxymethyl cellulose wakaderera zvakanyanya pane wemethyl cellulose.
Cellulose alkyl ether：
Zvinomiririra imethyl cellulose ne ethyl cellulose. Mukugadzirwa kwemaindasitiri, methyl chloride kana ethyl chloride inowanzo shandiswa se etherification agent, uye maitiro acho ndeekuti:
Mufomura, R inomiririra CH3 kana C2H5. Kuwanda kwealkali hakungokanganisi chete mwero we etherification, asiwo kunokanganisa kushandiswa kwealkyl halides. Kuwanda kwealkali kwakaderera, ndiko kunowedzera simba re hydrolysis yealkyl halide. Kuti kuderedza kushandiswa kwe etherifying agent, kuwanda kwealkali kunofanira kuwedzerwa. Zvisinei, kana kuwanda kwealkali kwakanyanya, kuzvimba kwe cellulose kunodzikira, izvo zvisingakonzeri etherification reaction, uye mwero we etherification unodzikira. Nechinangwa ichi, lye yakaomeswa kana solid lye inogona kuwedzerwa panguva ye reaction. Reactor inofanira kuva nemudziyo wakanaka wekukurunga nekubvarura kuitira kuti alkali igokwanisa kugoverwa zvakaenzana.
Methyl cellulose inoshandiswa zvakanyanya se thickener, adhesive uye protective colloid nezvimwewo. Inogona zvakare kushandiswa se dispersant ye emulsion polymerization, bonding dispersant yembeu, textile slurry, additive yezvekudya nezvizoro, medical adhesive, drug coating material, uye ye latex pendi, printing ink, ceramic production, uye yakasanganiswa nesimende. Inoshandiswa kudzora nguva yekuisa uye kuwedzera simba rekutanga, nezvimwewo.
Zvigadzirwa zve ethyl cellulose zvine simba guru remakanika, kuchinjika, kuramba kupisa uye kuramba kutonhora. Ethyl cellulose isingatsiviwe zvakanyanya inonyungudika mumvura uye inonyungudutsa mvura ine alkaline, uye zvigadzirwa zvisingatsiviwe zvakanyanya zvinonyungudika muzvinyungudutsi zvakawanda zve organic. Inoenderana zvakanaka nema resin akasiyana-siyana uye ma plasticizer. Inogona kushandiswa kugadzira mapurasitiki, mafirimu, ma varnish, manamati, latex nezvinhu zvekuputira zvemishonga, nezvimwewo.
Kuiswa kwemapoka ehydroxyalkyl mu cellulose alkyl ethers kunogona kuwedzera kunyungudika kwayo, kuderedza kunzwa kwayo pakuiswa munyu, kuwedzera tembiricha yegelation uye kuvandudza hunhu hwekupisa hunonyunguduka, nezvimwewo. Mwero wekuchinja kwehunhu hwataurwa pamusoro unosiyana zvichienderana nehunhu hwezvinhu zvinotsiva uye chiyero chemapoka ealkyl nehydroxyalkyl.
Cellulose hydroxyalkyl ether：
Zvinomiririra ihydroxyethyl cellulose nehydroxypropyl cellulose. Zvinhu zvinopisa maepoxides akadai seethylene oxide nepropylene oxide. Shandisa acid kana base se catalyst. Kugadzirwa kwemaindasitiri kunosanganisira alkali cellulose ine etherification agent: hydroxyethyl cellulose ine high substitution value inonyungudika mumvura inotonhora nemumvura inopisa. Hydroxypropyl cellulose ine high substitution value inonyungudika mumvura inotonhora chete asi kwete mumvura inopisa. Hydroxyethyl cellulose inogona kushandiswa sechinhu chinosimbisa latex coatings, textile printing and dyeing pastes, paper size materials, glues uye protective colloids. Kushandiswa kwehydroxypropyl cellulose kwakafanana nekwe hydroxyethyl cellulose. Hydroxypropyl cellulose ine low substitution value inogona kushandiswa semushonga unobatsira pakurapa, unogona kuva ne bonding and disintegrating properties.
Carboxymethylcellulose, yakapfupikiswa seCMC, inowanzo kuwanikwa muchimiro chemunyu wesodium. Chinhu chinodziisa muviri imonochloroacetic acid, uye maitiro acho ndeekuti:
Carboxymethyl cellulose ndiyo ether inonyungudika mumvura inoshandiswa zvakanyanya. Kare, yainyanya kushandiswa sedope rekuboorera, asi ikozvino yawedzerwa kuti ishandiswe sekuwedzera sipo, slurry yembatya, pendi yelatex, kuputira kadhibhodhi nepepa, nezvimwewo. Carboxymethyl cellulose yakachena inogona kushandiswa mukudya, mishonga, zvizoro, uye zvakare sechinamira checeramics nemolds.
Polyanionic cellulose (PAC) ionicether ye celluloseuye chigadzirwa chinotsiva chemhando yepamusoro checarboxymethyl cellulose (CMC). Iupfu kana granule chena, isina kuchena kana yero zvishoma, haina chepfu, haina kunaka, inonyungudika nyore nyore mumvura, ichigadzira mhinduro yakajeka ine viscosity yakati, ine kugadzikana kuri nani kwekupisa uye inodzivirira munyu, uye ine hunhu hwakasimba hwekurwisa mabhakitiriya. Haina kuora uye kuora. Ine hunhu hwekuchena kwakanyanya, huwandu hwenzvimbo inotsiva, uye kugoverwa kwakafanana kwezvinotsiva. Inogona kushandiswa sebinder, thickener, rheology modifier, fluid loss reducer, suspension stabilizer, nezvimwewo. Polyanionic cellulose (PAC) inoshandiswa zvakanyanya mumaindasitiri ese anogona kushandiswa neCMC, izvo zvinogona kuderedza zvakanyanya dosage, kuita kuti ishandiswe nyore, kupa kugadzikana kuri nani uye kusangana nezvinodiwa zvepamusoro zvemaitiro.
Cyanoethyl cellulose imugumisiro we cellulose ne acrylonitrile pasi pe catalysis ye alkali:
Cyanoethyl cellulose ine dielectric constant yakakwira uye low loss coefficient uye inogona kushandiswa se resin matrix ye phosphor uye electroluminescent lamps. Cyanoethyl cellulose isingatsiviwe zvakanyanya inogona kushandiswa se insulating bepa re transformers.
Maetha ane alcohol ane mafuta akawanda, alkenyl ethers, uye aromatic alcohol ethers e cellulose akagadzirwa, asi haasati ashandiswa pakuita basa iri.
Nzira dzekugadzirira cellulose ether dzinogona kukamurwa kuita nzira yemvura, nzira yekunyungudutsa, nzira yekukanya, nzira yekusurukira, nzira yegesi-yakasimba, nzira yechikamu chemvura uye musanganiswa wenzira dziri pamusoro.
Nguva yekutumira: Kubvumbi-28-2024