Hydroxypropyl methylcellulose (HPMC) isiri-ionic cellulose ether yakagadzirwa kubva kune yakasikwa polymer material cellulose kuburikidza nehurongwa hwemakemikari maitiro. Ihwo hupfu husina kunhuwa, husina muchetura uye husina chepfu hunoita hupfu hwakachena kana husina makore hushoma hwe colloidal mumvura inotonhora. Iine thickening, kusunga, kuparadzira, emulsifying, film-forming, suspending, adsorbing, gelling, surface active, hunyoro-kuchengetedza uye inodzivirira colloid properties. Hydroxypropyl methyl cellulose uye methyl cellulose inogona kushandiswa mukuvaka, indasitiri yependi, synthetic resin, ceramic indasitiri, mushonga, chikafu, machira, kurima, makemikari ezuva nezuva uye mamwe maindasitiri.
Mvura yekuchengeta mhedzisiro uye musimboti wehydroxypropyl methylcellulose HPMC
Cellulose ether HPMC inonyanya kuita basa rekuchengetedza mvura uye kukora mumatope esimende uye gypsum-based slurry, uye inogona kunyatso kuvandudza simba rakabatana uye sag kuramba kweslurry.
Zvinhu zvakadai semhepo tembiricha, tembiricha uye kumhanya kwemhepo zvinokanganisa huwandu hwekuvhuvhuta kwemvura mumatope esimende uye zvigadzirwa zvegypsum. Naizvozvo, mumwaka wakasiyana, kune mimwe misiyano mukuchengetedza mvura mhedzisiro yezvigadzirwa zvine huwandu hwakafanana hweHPMC yakawedzerwa. Mukuvaka chaiko, iyo yekuchengeta mvura mhedzisiro yeslurry inogona kugadziriswa nekuwedzera kana kudzikisa huwandu hweHPMC hwakawedzerwa. Kuchengetwa kwemvura kwemethyl cellulose ether pasi pemamiriro ekushisa kwakanyanya chiratidzo chakakosha chekusiyanisa kunaka kwemethyl cellulose ether. Yakanakisa HPMC yakatevedzana zvigadzirwa zvinogona kunyatsogadzirisa dambudziko rekuchengetedza mvura pasi pekushisa kwakanyanya. Mumwaka wekushisa kwakanyanya, kunyanya munzvimbo dzinopisa uye dzakaoma uye dzakatetepa-layer kuvakwa padivi rezuva, yemhando yepamusoro HPMC inodiwa kuvandudza kuchengetwa kwemvura kweslurry. Yepamusoro-mhando HPMC ine yakanaka kwazvo yakafanana. Mapoka ayo methoxy uye hydroxypropoxy akagoverwa zvakaenzana pamwe chete ne cellulose molecular chain, iyo inogona kuvandudza kugona kwemaatomu eokisijeni pa hydroxyl uye ether bond kuti abatanidze nemvura kuti vagadzire ma hydrogen bond. , kuitira kuti mvura yakasununguka ive yakasungwa mvura, kuitira kuti ibudirire kudzora kubuda kwemvura kunokonzerwa nekupisa kwekushisa kwemamiriro okunze, uye kuwana mvura yakakwirira yekuchengetedza.
Yepamusoro-mhando cellulose HPMC inogona kuparadzirwa zvakafanana uye zvinobudirira kuparadzirwa musimende dhaka uye gypsum-yakavakirwa zvigadzirwa, uye kuputira zvese zvimedu zvimedu, uye kugadzira firimu rekunyorova, hunyoro huri mugadziko hunoburitswa zvishoma nezvishoma kwenguva yakareba, uye inorganic glue Iyo hydration reaction yeiyo coagulated zvinhu inovimbisa kusimba kwechisungo uye kumanikidza kusimba kwechinhu. Nokudaro, mukugadzirwa kwezhizha kwezhizha, kuitira kuti uwane simba rekuchengetedza mvura, zvakakosha kuwedzera zvigadzirwa zveHPMC zvepamusoro muhuwandu hwakakwana maererano nemaitiro, kana zvisina kudaro, pachava nekusakwana hydration, kuderedzwa kwesimba, kuputika, kuputika uye kudurura kunokonzerwa nekuoma kwakanyanya. matambudziko, asiwo kuwedzera kuoma kwekuvaka kwevashandi. Sezvo tembiricha inodonha, huwandu hwemvura HPMC hwakawedzerwa hunogona kuderedzwa zvishoma nezvishoma, uye iyo yakafanana yekuchengetedza mvura inogona kuwanikwa.
Kuchengetwa kwemvura kwehydroxypropyl methylcellulose HPMC chigadzirwa pachayo kunowanzo kukanganiswa nezvinhu zvinotevera:
Zvakafanana zvakaitwa HPMC, methoxyl uye hydroxypropoxyl zvakagoverwa zvakaenzana, uye chiyero chekuchengetedza mvura chakakwirira;
Cellulose ether HPMC thermal gel tembiricha yakakwira, mwero wekuchengetedza mvura wakakwira; kana zvisina kudaro, chiyero chekuchengetedza mvura chakaderera;
Apo viscosity ye cellulose ether HPMC inowedzera, chiyero chekuchengetedza mvura chinowedzerawo; apo viscosity inosvika kune imwe nhanho, kuwedzera kwehuwandu hwekuchengetedza mvura kunowanzova munyoro;
Iyo yakakura huwandu hweselulosi ether HPMC yakawedzerwa, iyo yakakwirira yehuwandu hwekuchengetedza mvura uye zvirinani mhedzisiro yekuchengeta mvura. Muchikamu che 0.25-0.6% kuwedzera, chiyero chekuchengetedza mvura chinowedzera nokukurumidza nekuwedzera kwekuwedzera kwekuwedzera; apo huwandu hwekuwedzera hunowedzera kuwedzera, kuwedzera kwemaitiro ekuchengetwa kwemvura kunononoka.
Nguva yekutumira: Jun-01-2023