Kuvandudza mhedzisiro yehydroxypropyl methyl cellulose pane simende-yakavakirwa zvinhu

Mumakore achangopfuura, nekuenderera mberi kwekuvandudzwa kwekunze kwemadziro ekupisa tekinoroji, kuenderera mberi kwehydroxypropyl methyl cellulose kugadzira tekinoroji, uye hunhu hwakanakisa hwehydroxypropyl methyl cellulose HPMC pachayo, hydroxypropyl methyl cellulose HPMC yakashandiswa zvakanyanya muindasitiri yekuvaka.

kuisa nguva

Nguva yekugadzika kongiri inonyanya kuenderana nekugadzika nguva yesamende, uye iyo yakaunganidzwa haina simba.Naizvozvo, nguva yekumisikidza yedhaka inogona kushandiswa kutsiva tsvagiridzo pamusoro pesimba reHPMC panguva yekumisikidza yepasi pemvura isiri dispersive kongiri musanganiswa.Sezvo nguva yekugadzika kwedhaka inobatwa nehuwandu hwemvura simenti uye samende jecha reshiyo, kuitira kuti uongorore simba reHPMC panguva yekugadzika kwedhaka, zvakakosha kugadzirisa mvura simenti reshiyo uye samende jecha reshiyo yedhaka.

Kuedza kwekuedza kunoratidza kuti kuwedzerwa kweHPMC kune kukanganisa kunokonzera musanganiswa wedhaka, uye nguva yekugadzira dhaka inowedzera nekuwedzera kwehuwandu hwe cellulose ether HPMC.Nehuwandu hwakafanana hweHPMC, nguva yekugadzika yedhaka yakaumbwa pasi pemvura yakareba kudarika iyo yakaumbwa mumhepo.Kana yakayerwa mumvura, nguva yekumisikidza yedhaka yakasanganiswa neHPMC ndeye 6 ~ 18h gare gare mukumisikidzwa kwekutanga uye 6 ~ 22h gare gare mukumisikidza kwekupedzisira kupfuura iyo yemuenzaniso usina chinhu.Naizvozvo, HPMC inofanirwa kushandiswa pamwe chete neyekutanga simba mumiriri.

HPMC ipolymer ine macromolecular linear chimiro, ine hydroxyl mapoka pamapoka anoshanda, ayo anogona kuumba hydrogen zvisungo nekusanganisa mamorekuru emvura kuwedzera viscosity yekusanganisa mvura.Iyo yakareba cheni yemamorekuru eHPMC inokwezva mumwe nemumwe, ichiita HPMC mamorekuru anopindirana kuti aumbe network chimiro, uye kuputira simende nekusanganisa mvura.Sezvo HPMC ichigadzira network yakafanana nefirimu uye inoputira simende, inogona kudzivirira kuvhuvhuta kwemvura mudhaka uye kutadzisa kana kuderedza simende hydration rate.

Kubuda ropa

Chiitiko chekubuda ropa chedhaka chakafanana neicho chekongiri, izvo zvinokonzeresa kugadzirisa kwakakomba kweaggregates, kuwedzera simenti yemvura reshiyo yepamusoro slurry, inokonzera iyo yepamusoro layer slurry kuve nehombe yepurasitiki shrinkage, kana kutotsemuka padanho rekutanga, uye kusimba kwenzvimbo ine matope zvishoma.

Kana iyo dosi inopfuura 0.5%, hapana kana kubuda ropa.Izvi zvinodaro nekuti kana HPMC yakasanganiswa mudhaka, HPMC ine firimu-inogadzira uye reticular chimiro, pamwe neiyo adsorption yehydroxyl pane refu cheni ye macromolecule, iyo inoita kuti simende uye kusanganisa mvura mumatope kuita flocculent, kuve nechokwadi chimiro chakasimba che. dhaka.Kana HPMC yawedzerwa mudhaka, akawanda akazvimirira mabhururu madiki anoumbwa.Aya mabhuru anozogovaniswa zvakaenzana mudhaka uye anotadzisa kuiswa kweaggregates.Iyi tekinoroji kuita kweHPMC ine simba guru pazvinhu zvine simende, uye inowanzo shandiswa kugadzirira macomposites matsva esimende akadai sedhaka rakaoma uye dhaka repolymer, kuitira kuti vave nemvura yakanaka uye kuchengetedza mapurasitiki.

Kudiwa kwemvura kwedhaka

Kana huwandu hweHPMC hudiki kwazvo, hune simba guru pakuda kwemvura yedhaka.Pasi pemamiriro ekuti kuwedzera kwedhaka nyowani kwakangofanana, huwandu hweHPMC uye kudiwa kwemvura kwedhaka kunoshanduka zvine mutsetse mune imwe nguva yenguva, uye kudiwa kwemvura kwedhaka kunotanga kuderera uye kwozowedzera.Kana iyo HPMC yemukati iri pasi pe0.025%, nekuwedzera kweiyo HPMC yemukati, kudiwa kwemvura kwedhaka kunoderera pasi peiyo dhigirii yekuwedzera, iyo inoratidza kuti idiki iyo HPMC yemukati, mvura inoderedza mhedzisiro yedhaka.Mhepo inopinza mhedzisiro yeHPMC inoita kuti dhaka rive nenhamba huru yemabhuru madiki akazvimirira, ayo anoita basa mukuzora uye kunatsiridza kuyerera kwedhaka.Kana iyo dosi yakakura kupfuura 0.025%, kudiwa kwemvura kwedhaka kunowedzera nekuwedzera kwedosi, izvo zviri nekuda kwekuwedzera kutendeseka kweiyo network yeHPMC, kupfupisa kwegeji pakati pema flocs pane refu molecular cheni, kukwezva uye kubatana, uye kuderedzwa kwekuyerera kwedhaka.Naizvozvo, kana dhigirii rekuwedzera rakafanana, slurry inoratidza kuwedzera kwekuda kwemvura.