imwe. Musiyano pakati pezvakasvibiswahydroxypropyl methylcellulose (HPMC)uye pure hydroxypropyl methylcellulose (HPMC)
1. Chitarisiko: Hydroxypropyl methylcellulose HPMC yakachena inotaridzika zvakanaka uye ine huwandu hushoma, kubva pa0.3-0.4g/ml; hydroxypropyl methylcellulose yakagadziriswa HPMC ine kuyerera kuri nani uye inonzwa yakakora, uye pane musiyano mukuru pakuonekwa kubva kune chigadzirwa chaicho.
2. Mamiriro: Upfu hwe HPMC hwakachena hune fibrous pasi pe microscope kana magnifying glass; nepo hydroxypropyl methylcellulose HPMC yakagadziriswa inogona kuonekwa se granular solids kana crystals pasi pe microscope kana magnifying glass.
3. Kunhuhwirira: Hydroxypropyl methylcellulose yakachena HPMC hainzwi kunhuhwirira kweammonia, starch nedoro; HPMC inogona kunhuhwirira kunhuhwirira kwemarudzi ese, kunyangwe isina kunaka, inonzwa kurema.
4. Mhinduro yemvura: HPMC mvura yakachena yakachena, ine chiedza chakawanda, ine mwero wekuchengetedza mvura ≥ 97%; HPMC mvura yakasanganiswa ine matope, uye mwero wekuchengetedza mvura wakaoma kusvika 80%.
Chechipiri, kuchengetwa kwemvura kwehydroxypropyl methylcellulose HPMC, kunosiyanisa zvakanakira nezvakaipira:
Kuchengetwa kwemvura kwemethyl cellulose ether mumamiriro ekupisa kwakanyanya chiratidzo chakakosha chekusiyanisa mhando yemethyl cellulose ether. Zvinhu zvakaita sekupisa kwemhepo, tembiricha uye kumhanya kwekumanikidzwa kwemhepo zvinokanganisa mwero wekupisa kwemvura mumota yesimende uye zvigadzirwa zvakagadzirwa negypsum. Nokudaro, mumwaka yakasiyana, pane misiyano mumhedzisiro yekuchengetedza mvura yezvigadzirwa zvine huwandu hwakafanana hweHPMC hwakawedzerwa. Mukugadzirwa kwacho, mhedzisiro yekuchengetedza mvura yeslurry inogona kugadziriswa nekuwedzera kana kuderedza huwandu hweHPMC hwakawedzerwa. Zvigadzirwa zveHPMC zvakanaka kwazvo zvehydroxypropyl methylcellulose zvinogona kugadzirisa dambudziko rekuchengetedzwa kwemvura pasi pekupisa kwakanyanya.
Methylcellulose yepamusoro-soro inogona kuparadzirwa zvakaenzana uye zvinobudirira mumota yesimende uye zvigadzirwa zvakagadzirwa negypsum, uye kuputira zvidimbu zvese zvakasimba, uye kugadzira firimu rinonyorovesa, hunyoro huri muhwaro hunoburitswa zvishoma nezvishoma kwenguva yakareba, uye inorganic. Kugadziriswa kwemvura kwechinhu chakaiswa mugell kunoita kuti chisimbiswe uye simba rekumanikidza rechinhu chacho. Hydroxypropyl methylcellulose HPMC yepamusoro-soro, kufanana kwayo kwakanaka kwazvo, mapoka ayo emethoxy nehydroxypropoxy akagoverwa zvakaenzana pamwe chete ne cellulose molecular chain, inogona kuwedzera okisijeni pa hydroxyl ne ether bonds. Kugona kwemaatomu kubatana nemvura kugadzira hydrogen bonds kunoshandura mvura yakasununguka kuita mvura yakasungwa, nokudaro zvichinyatso dzora kubuda kwemvura kunokonzerwa nemamiriro ekunze anopisa uye kuwana mvura yakawanda inochengetwa.
Saka, mukuvaka kwezhizha kunodziya zvakanyanya, kuti mvura irambe ichichengetwa zvakanaka, zvakakosha kuwedzera zvigadzirwa zveHPMC zvemhando yepamusoro muhuwandu hwakakwana zvichienderana nefomura, zvikasadaro, pachava nekushaikwa kwemvura yakakwana, simba shoma, kutsemuka, kuvharika uye kudonha kwemvura kunokonzerwa nematambudziko ekuoma zvakanyanya, asiwo kuwedzera kuoma kwevashandi pakuvaka. Sezvo tembiricha ichidzikira, huwandu hwemvura inowedzerwa neHPMC hunogona kudzikiswa zvishoma nezvishoma, uye mhedzisiro imwechete yekuchengetedza mvura inogona kuwanikwa.
3. Kunyungudika kwehydroxypropyl methylcellulose HPMC
Muindasitiri yekuvaka, hydroxypropyl methylcellulose HPMC inowanzoiswa mumvura isina kunyungudutswa, uye chigadzirwa cheHPMC chinonyungudutswa chega kuti chione mwero wekunyungudutswa. Mushure mekuiswa mumvura isina kunyungudutswa chete, chigadzirwa chinokurumidza kuungana chisina kupararira chigadzirwa chisina kugadziriswa pamusoro; mushure mekuiswa mumvura isina kunyungudutswa chete, chigadzirwa chinogona kupararira chisina kuungana pamwe chete chigadzirwa chine kugadziriswa pamusoro. Kana pamusoro pasina kugadziriswa hydroxypropyl methylcellulose HPMC painonyungudutswa yega, chidimbu chayo chimwe chete chinonyungudutswa nekukurumidza uye chinoita firimu nekukurumidza, zvichiita kuti mvura isapinde mune zvimwe zvikamu, zvichikonzera kuungana uye kuungana, uko parizvino kunonzi kunyungudutswa zvishoma nezvishoma muzvigadzirwa zvemusika.
Zvidimbu zvechigadzirwa cheHPMC zvakagadziriswa pamusoro, mumvura isina kusimba, zvidimbu zvega zvega zvinogona kupararira pasina kuungana, asi viscosity yechigadzirwa hachizobva changoerekana chanyungudutswa. Mushure mekunyikwa kwenguva yakati, chimiro chemakemikari chekurapa pamusoro chinoparadzwa, uye mvura inogona kunyungudutsa zvidimbu zveHPMC. Panguva ino, zvidimbu zvechigadzirwa zvanyatsopararira uye zvakanyungudutswa mvura yakakwana, saka chigadzirwa hachizoungani kana kuungana mushure mekunyungudutswa. Kumhanya kwekupararira uye kumhanya kwekunyungudutswa zvinoenderana nehuwandu hwekurapa pamusoro. Kana kurapwa pamusoro kuri kushoma, kumhanya kwekupararira kunonoka uye kumhanya kwekunamira kunokurumidza; nepo chigadzirwa chine kurapwa kwepamusoro-soro chiine kumhanya kwekupararira nekukurumidza uye kumhanya kwekunamira kunonoka. Kana uchida kuita kuti zvigadzirwa izvi zvinyungudutswe nekukurumidza mumamiriro aya, unogona kudonhedza huwandu hushoma hwezvinhu zvealkaline kana zvanyungudutswa zvega. Musika uripo unowanzo kunzi zvigadzirwa zvepakarepo. Hunhu hwezvigadzirwa zveHPMC zvakagadziriswa pamusoro ndehwekuti: mumvura ine mvura, zvidimbu zvinogona kupararira pamwe chete, zvinogona kunyungudutswa nekukurumidza mumamiriro ealkaline, uye zvinonyunguduka zvishoma nezvishoma mumamiriro ealkaline uye acidic.
Hunhu hwehydroxypropyl methylcellulose HPMC isina kurapwa ndeihu: chidimbu chimwe chete chinonyunguduka nekukurumidza mumamiriro eacidic, alkaline, uye neutral, asi hachigone kupararira pakati pezvidimbu zviri mumvura, zvichikonzera kuungana uye kuungana. Mukushanda chaiko, mushure mekupararira kwezvigadzirwa izvi nezvidimbu zvakasimba zvakaita sehupfu hwerabha, simende, jecha, nezvimwewo, mwero wekunyunguduka unokurumidza zvikuru, uye hapana kuungana kana kuungana. Kana zvichidikanwa kunyungudutsa zvigadzirwa zveHPMC zvakasiyana, zvigadzirwa izvi zvinofanirwa kushandiswa nekungwarira, sezvo zvichaungana uye zvichibatana. Kana zvichidikanwa kunyungudutsa chigadzirwa cheHPMC chisina kugadziriswa pamusoro chakaparadzaniswa, chinofanira kuparadzirwa zvakaenzana nemvura inopisa ye95°C, uye chozotonhodzwa kuti chinyunguduke.
Mukushanda chaiko kwekugadzira, mhando iyi yezvigadzirwa inowanzonyunguduka mushure mekuparadzirwa nezvimwe zvinhu zvakasimba pasi pemamiriro ealkaline, uye mwero wayo wekunyunguduka hauna kusiyana newezvigadzirwa zvisina kugadziriswa. Yakakodzerawo kushandiswa muzvigadzirwa zvakanyunguduka zvega, pasina kuchekwa kana mapundu. Muenzaniso chaiwo wechigadzirwa unogona kusarudzwa zvichienderana nemwero wekunyunguduka unodiwa nekuvakwa.
Munguva yekuvaka, ingave simende kana gypsum-based slurry, mazhinji acho ari alkaline systems, uye huwandu hweHPMC hunowedzerwa hushoma kwazvo, hunogona kupararira zvakaenzana pakati pezvikamu izvi. Kana mvura yawedzerwa,HPMCichakurumidza kunyunguduka.
Nguva yekutumira: Kubvumbi-26-2024