Hydroxypropyl methyl cellulose HPMC isiri-ionic cellulose ether yakagadzirwa kubva kune yakasikwa polymer material cellulose kuburikidza nekutevedzana kwemakemikari kugadzirisa.Ihwo hupfu husina kunhuhwirira, husina muchetura uye husina chepfu hupfu hunoita kuti huve hwakajeka kana hushoma hwakaita turbid colloidal solution mumvura inotonhora.Iyo ine hunhu hwekukora, kubatana, kupararira, emulsification, kuumbwa kwemafirimu, kumiswa, adsorption, gelation, chiitiko chepamusoro, kuchengetedza mwando uye inodzivirira colloid.Hydroxypropyl methylcellulose inogona kushandiswa mukuvaka, indasitiri yekupfekedza, resin yekugadzira, indasitiri yedongo, mushonga, chikafu, machira, zvekurima, indasitiri yemakemikari yemazuva ese uye mamwe maindasitiri.
Basa rekuchengetedza mvura uye musimboti: cellulose ether HPMC inonyanya kuita basa rekuchengetedza mvura uye kukora mune simende dhaka uye gypsum-based slurry, iyo inogona zvinobudirira kuvandudza simba rekubatanidza 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 kwehuwandu hwakafanana hwezvigadzirwa zveHPMC.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 pakupisa 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., Saka kuti mvura yakasununguka inova yakasungwa mvura, nokudaro inobudirira kudzora kubuda kwemvura kunokonzerwa nekupisa kwemamiriro okunze, uye kuwana mvura yakakwirira yekuchengetedza.
Yepamusoro-mhando cellulose HPMC inogona kuparadzirwa zvakafanana uye zvinobudirira mudhaka resimende uye gypsum-based zvigadzirwa, uye kuputira zvese zvakasimba zvimedu, uye kugadzira dhizaini yekunyorova firimu.Mvura iri muchigadziko inosunungurwa zvishoma nezvishoma kwenguva yakareba.Iyo yakanyungudutswa zvinhu inosangana ne hydration reaction, kuitira kuti ive nechokwadi chekubatana kwesimba uye kumanikidza kusimba kwechinhu.Naizvozvo, mukupisa kwekupisa kwezhizha kuvakwa, kuti uwane mhedzisiro yekuchengetwa kwemvura, emhando yepamusoro HPMC zvigadzirwa zvinofanirwa kuwedzerwa muhuwandu hwakakwana maererano neformula, zvikasadaro, kusakwana kwemvura, kuderedzwa kwesimba, kuputika, kuputika uye kudonha. zvichaitika nekuda kwekunyanya kuoma.Matambudziko, asiwo anowedzera kuoma kwevashandi vekuvaka.Sezvo tembiricha inodzikira, huwandu hweHPMC hwakawedzerwa hunogona kudzikiswa zvishoma nezvishoma, uye iyo yakafanana yekuchengetedza mvura inogona kuwanikwa.
Kuchengetwa kwemvura kweHPMC kunokonzerwa nezvinhu zvinotevera:
1. Homogeneity ye cellulose ether HPMC
Mune homogeneously yakaitwa HPMC, methoxy uye hydroxypropoxy mapoka akagoverwa zvakaenzana, uye mwero wekuchengetedza mvura wakakwira.
2. Thermal gel tembiricha ye cellulose ether HPMC
Thermal gel tembiricha yakakwira, mwero wekuchengetedza mvura wakakwira;pane zvinopesana, chiyero chekuchengetedza mvura chakaderera.
3. Viscosity ye cellulose ether HPMC
Kana viscosity yeHPMC ichiwedzera, chiyero chekuchengetedza mvura chinowedzerawo;apo viscosity inosvika kune imwe nhanho, kuwedzera kwehuwandu hwekuchengetedza mvura kunowanzova sandara.
4. Kuwedzerwa kwe cellulose ether HPMC
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 ekuchengetedza mvura kunononoka.
Nguva yekutumira: Zvita-16-2021