Cellulose ether izwi rinowanzoreva nhevedzano yezvigadzirwa zvinogadzirwa nekuita kwealkali cellulose uye etherifying agent mune mamwe mamiriro. Alkali cellulose inotsiviwa neakasiyana etherifying agents kuti awane zvakasiyanacellulose ethers. Zvinoenderana neiyo ionization yezvinhu zvinotsiva, cellulose ethers inogona kukamurwa kuita mapoka maviri: ionic (senge carboxymethyl cellulose) uye isiri-ionic (senge methyl cellulose). Zvinoenderana nerudzi rweinotsiva, cellulose ether inogona kukamurwa kuita monoether (senge methyl cellulose) uye yakasanganiswa ether (senge hydroxypropyl methyl cellulose). Maererano nekunyungudika kwakasiyana-siyana, inogona kukamurwa kuva inonyungudika mumvura (yakadai sehydroxyethyl cellulose) uye organic solvent-soluble (yakadai se ethyl cellulose), nezvimwewo. Dry-mixed mortar inonyanya kunyunguduka mumvura, uye mvura-soluble cellulose ndiyo. yakakamurwa kuva pakarepo mhando uye pamusoro kubatwa kunonoka kupera mhando.
Mushure mekunge cellulose ether mudhaka yakanyungudutswa mumvura, kugovera kunoshanda uye kwakafanana kwesimende zvinhu muhurongwa kunovimbiswa nekuda kwebasa repamusoro, uye cellulose ether, senge inodzivirira colloid, "inoputira" zvimedu zvakasimba uye zvivharo. ivo pamusoro pekunze. Gadzira firimu rekuzora, ita kuti sisitimu yevhu igadzikane, uye zvakare uvandudze kuyerera kwedhaka panguva yekusanganiswa uye kutsetseka kwekuvaka.
Nekuda kwechimiro chayo chemorekuru, iyo cellulose ether mhinduro inoita kuti mvura iri mudhaka isave nyore kurasikirwa, uye zvishoma nezvishoma inoiburitsa kwenguva yakareba, ichipa dhaka nekuchengetedza mvura kwakanaka uye kushanda.
Kuzvigadzika pasi simende dhaka, ine yakaderera viscosity hydroxypropyl methylcellulose ether. Sezvo pasi rose rakasimudzwa pasina kupindira kudiki nevashandi vekuvaka, zvichienzaniswa neyakapfuura bhuku rekugadzirisa, kufuratira uye kumhanya kwekuvaka kunovandudzwa zvakanyanya. Iyo yekuzvimiririra yakaoma yekusanganisa nguva inotora mukana wekuchengetwa kwemvura kwakanaka kwehydroxypropyl methylcellulose. Sezvo kuzvienzanisa kunoda kuti dhaka rakavhenganiswa ringomira pasi, mvura yacho yakati kurei. Mushure mekuwedzera hpmc, ichadzora pasi Kuchengetwa kwemvura kwepamusoro hakusi pachena, izvo zvinoita kuti simba repamusoro rive rakakwirira mushure mekuoma, uye shrinkage iduku, iyo inoderedza kuputika. Kuwedzerwa kweHPMC kunopawo viscosity, iyo inogona kushandiswa seye-anti-sedimentation aid, inosimudzira fluidity uye kupomba, uye kuvandudza kugona kwekugadzira pasi.
Yakanaka cellulose ether ine fluffy yekuona mamiriro uye diki density yakawanda; yakachena HPMC ine kuchena kwakanaka, iyo mbishi inoshandiswa mukugadzira yakachena, maitiro anowedzera uye haana tsvina, mhinduro ine aqueous yakajeka, mwenje wekufambisa wakakwira, uye hapana ammonia, starch uye madoro. Kuravira, fibrous pasi pemaikorosikopu kana girazi rinokudza.
Nguva yekutumira: Zvita-06-2022