Basa uye musimboti wekuchengetedza mvura yehydroxypropyl methylcellulose HPMC

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 methylcellulose uye methylcellulose inogona kushandiswa mukuvaka zvinhu, pendi indasitiri, synthetic resin, ceramic indasitiri, mushonga, chikafu, machira, kurima, makemikari ezuva nezuva uye mamwe maindasitiri.

Hydroxypropyl methylcellulose HPMC kemikari equation:
[C6H7O2(OH)3-mn(OCH3)m(OCH2CH(OH)CH3)n]x

Iyo yekuchengeta mvura mhedzisiro uye musimboti wehydroxypropyl methylcellulose HPMC:
Cellulose ether HPMCinonyanya kuita basa rekuchengetedza mvura uye kukora mudhaka resimende 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 methoxyl uye hydroxypropoxyl akagovaniswa zvakaenzana pamwe chete ne cellulose molecular chain, iyo inogona kuvandudza kugona kwemaatomu eokisijeni pa hydroxyl uye ether bond kuti abatanidzwe nemvura kuti igadzire 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 zvakasimba zvimedu, uye kugadzira firimu rekunyorovesa, hunyoro huri mubhesi hunoburitswa zvishoma nezvishoma kwenguva yakareba, uye inorganic glue. hydration reaction yeiyo coagulated zvinhu inovimbisa iyo bond simba uye kumanikidza kusimba kwechinhu. Naizvozvo, mukupisa kwekupisa kwezhizha kuvakwa, kuitira kuti uwane mhedzisiro yekuchengetedza mvura, zvinodikanwa kuti uwedzere emhando yepamusoro zvigadzirwa zveHPMC muhuwandu hwakakwana maererano neformula, zvikasadaro, pachave nekusakwana hydration, kuderedzwa simba, kuputika, kuputika. uye kudurura kunokonzerwa nekuomeswa zvakanyanya. 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:

1. Kufanana kwe cellulose ether HPMC
Yakaenzana yakabatwa HPMC, methoxyl uye hydroxypropoxyl zvakagoverwa zvakaenzana, uye mwero wekuchengetedza mvura wakakwira.

2. Cellulose ether HPMC thermal gel tembiricha
Iyo yakakwirira tembiricha yekudziya gel, iyo yakakwirira yekuchengeta mvura; kana zvisina kudaro, iyo yakaderera mwero wekuchengetedza mvura.

3. Cellulose Eteri HPMC Viscosity
Kana viscosity yeHPMC ichiwedzera, chiyero chekuchengetedza mvura chinowedzerawo; apo viscosity inosvika kune imwe nhanho, kuwedzera kwehuwandu hwekuchengetedza mvura kunowanzova munyoro.

4. Kuwedzera huwandu hwe 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 ekuchengetwa kwemvura kunononoka.