Cellulose ether ipolymer yakagadzirwa kubva kucellulose yechisikigo kuburikidza nekuchinja kwemakemikari. Cellulose ether inobva kucellulose yechisikigo. Kugadzirwa kwecellulose ether kwakasiyana nemapolymer ekugadzira. Chinhu chayo chikuru icellulose, musanganiswa wepolymer wechisikigo. Nekuda kwehunhu hwechimiro checellulose yechisikigo, cellulose pachayo haina kugona kuita ne etherification agents. Zvisinei, mushure mekurapwa kwemushonga wekuzvimba, hydrogen bonds yakasimba pakati pemaketani emamorekuru nemaketani inoparadzwa, uye kusunungurwa kwehydroxyl group kunova reactive alkali cellulose. Wana cellulose ether.
Hunhu hwema ether e cellulose hunoenderana nerudzi, huwandu uye kugoverwa kwezvinotsiva. Kurongwa kwe ether ye cellulose kunorongwawo zvichienderana nerudzi rwezvinotsiva, mwero we ether, kunyungudika uye hunhu hwakabatana hwekushandisa. Zvichienderana nerudzi rwezvinotsiva pa molecular chain, inogona kukamurwa kuita monoether uye mixed ether. MC yatinowanzo shandisa imonoether, uye HPMC imixed ether. Methyl cellulose ether MC chigadzirwa mushure mekunge hydroxyl group iri pa glucose unit ye natural cellulose yatsiviwa ne methoxy. Ichi chigadzirwa chinowanikwa nekutsiva chikamu che hydroxyl group pa unit ne methoxy group uye chimwe chikamu ne hydroxypropyl group. Fomura yechimiro ndeiyi [C6H7O2(OH)3-mn(OCH3)m[OCH2CH(OH)CH3]n]x Hydroxyethyl methyl cellulose ether HEMC, idzi ndidzo mhando huru dzinoshandiswa zvakanyanya uye dzinotengeswa mumusika.
Panyaya yekunyungudika, inogona kukamurwa kuita ionic neisina ionic. Ma ether e non-ionic cellulose anonyungudika mumvura anonyanya kuumbwa ne alkyl ethers mbiri dzakatevedzana uye hydroxyalkyl ethers. Ionic CMC inonyanya kushandiswa mu sipo dzekugadzira, kudhinda nekudhaya machira, kutsvaga chikafu nemafuta. Non-ionic MC, HPMC, HEMC, nezvimwewo zvinonyanya kushandiswa muzvinhu zvekuvaka, latex coatings, mishonga, makemikari ezuva nezuva, nezvimwewo. Anoshandiswa se thickener, water retaining agent, stabilizer, dispersant uye film forming agent.
Kuzivikanwa kwemhando yepamusoro ye cellulose ether:
Mhedzisiro yehuwandu hwemethoxyl pahunhu: kuchengetedza mvura uye basa rekukora
Kubudirira kwehuwandu hwehydroxyethoxyl/hydroxypropoxyl: huwandu hwakawanda, ndiko kuchengetwa kwemvura kuri nani.
Hunhu hwe viscosity: kana polymerization yakakwira, viscosity yakakwira uye kuchengetedza mvura kuri nani.
Hunhu hwekunatswa kwesimbi: kupararira nekunyungudika kwesimbi mudura, ndiko kukurumidza uye kwakafanana, uye kuchengetedza mvura kunova nani.
Kukanganiswa kwemhando yepamusoro kwekufambisa chiedza: kana polymerization yakakwira, polymerization yakaenzana, uye kusvibiswa kushoma
Kukanganiswa kwemhando yekupisa kwejeli: tembiricha yekugadzirwa kwejeli inenge 75°C
Kukanganiswa kwehunhu hwemvura: <5%, cellulose ether iri nyore kunyudza hunyoro, saka inofanira kuvharwa uye kuchengetwa
Kukanganiswa kwemhando yedota: <3%, kana dota rakawanda, tsvina yakawanda
PH kukosha kwemhando yepamusoro: iri pedyo neyakarerekera, cellulose ether ine mashandiro akagadzikana pakati pePH: 2-11
Nguva yekutumira: Kukadzi-14-2023