introduce
Hydroxypropyl methylcellulose (HPMC) is water-soluble cellulose ether inowanzoshandiswa mumhando dzakasiyana-siyana dzakadai sekuvaka, chikafu, mishonga yemishonga uye zvizoro nekuda kwezvakasiyana-siyana zvakadai sekuchengetedza mvura, kukora uye kugadzira firimu. Iwo ekuchengetedza mvura zvivakwa zveHPMC zvakanyanya kukosha mukuvaka sezvo zvichibatsira kuvandudza kushanda, kuderedza kutsemuka uye kuwedzera kushanda kwesimende-yakavakirwa zvinhu. Naizvozvo, kuyera nemazvo simba rekuchengetedza mvura reHPMC kwakakosha kuve nechokwadi chemhando yechigadzirwa chekupedzisira. Muchinyorwa chino, tichakurukura nzira yeHPMC yekuchengeta mvura yekuyedza uye kukosha kwayo muindasitiri yekuvaka.
Nzira yekuedza kuchengetedza mvura
Kugona kubata mvura kweHPMC kunoyerwa nehuwandu hwemvura iyo HPMC inogona kuchengetedza munguva yakatarwa. Pane nzira dzakawanda dzekuyedza kuchengetwa kwemvura kweHPMC, nzira inonyanya kushandiswa inzira yecentrifugation. Iyo nzira ine matanho makuru matatu:
Danho 1: Muenzaniso Kugadzirira
Nhanho yekutanga ndeyekugadzirira iyo HPMC sampu. Weresa imwe huwandu hweHPMC hupfu pachine nguva uye wedzera imwe huwandu hwemvura kuita slurry. Huyero hweHPMC kumvura hunosiyana zvichienderana nezvinodiwa zvekushandisa uye kuyedzwa. Nekudaro, chiyero chakajairwa i0.5% HPMC kumvura nehuremu. Iyo slurry inofanirwa kusimudzwa kwemaminetsi akati wandei kuve nechokwadi chekuti HPMC yakaparadzirwa zvakaenzana mumvura. Zvadaro, regai slurry igare kwemaawa gumi nemaviri kuti ive nechokwadi chokuti yakazara hydrated.
Danho 2: Centrifuge
Mushure memaawa gumi nemaviri, bvisa slurry uye isa huremu hunozivikanwa hweslurry mu centrifuge chubhu. Iyo chubhu inozoiswa mu centrifuge uye inopepetwa pane imwe sipidhi kwenguva yakatarwa. Iko kumhanya uye nguva ye centrifugation inogona kusiyana zvichienderana nenzira yakasarudzwa. Kazhinji, kumhanya kwecentrifuge ndeye 3000rpm uye nguva yekuyedza maminetsi makumi matatu. Nekudaro, zviyero zvakasiyana zvinogona kuda kumhanya kwakasiyana uye nguva.
Nhanho 3: Kuverengera kukosha kwekuchengetedza mvura
Mushure me centrifugation, bvisa chubhu uye patsanura mvura kubva kuHPMC. Kukosha kwekuchengetedza mvura kunogona kuverengerwa sezvinotevera:
Kuchengeta mvura kukosha = [(HPMC + uremu hwemvura isati yaiswa centrifugation) - (HPMC + uremu hwemvura mushure me centrifugation)] / (HPMC + uremu hwemvura pamberi pecentrifugation) x 100
Kukosha kwekuchengetedza mvura kunoratidza huwandu hwemvura inochengetwa neHPMC mushure mekuita centrifugation.
Kukosha kwekuongororwa kwekuchengetedza mvura mukuvaka
Kuyedzwa kwekuchengetedza mvura kwakakosha muindasitiri yekuvaka sezvo ichibatsira kuve nechokwadi chekuti chigadzirwa chekupedzisira chine mhando uye chinosangana nezvinodiwa. HPMC inowanzoshandiswa mune simende-based zvinhu zvakaita sedhaka, grout uye kongiri kuvandudza kushanda kwavo, kuderedza kuderera uye kuwedzera kusimba kwazvo. Iwo ekuchengetedza mvura zvivakwa zveHPMC anoita basa rakakosha mukuwana izvi mabhenefiti.
Iko kukosha kwekuchengetedza mvura kweHPMC inotarisa huwandu hwemvura inogona kuchengetwa mune simenti-based material, iyo inobatsira pakushanda kwayo. Cementitious zvinhu zvine mazinga ekuchengetedza mvura zvakanyanya zvinogoneka uye zviri nyore kusanganisa nekuisa. Pamusoro pezvo, zvinhu zvine kukosha kwekuchengetedza mvura zvakanyanya zvine mahomwe emhepo mashoma, izvo zvinoderedza mukana wekutsemuka uye zvinowedzera kusimba kwese kwechinhu.
Pamusoro pezvo, kukosha kwekuchengetedza mvura kweHPMC chiratidzo chemhando yeHPMC inoshandiswa mune zvinyorwa. HPMC ine inodiwa yekuchengetedza mvura inovimbisa kushanda kwenguva refu kwezvinhu zvekuvaka. Kusiyana neizvi, HPMC ine yakaderera yekuchengetedza mvura maitiro inogona kutungamirira kune isina kukwana zvivakwa zvekuvaka, kusabatana kwakashata uye shrinkage, zvichizotungamira mukukundikana kwezvinhu zvekuvaka.
mukupedzisa
Kuongororwa kwekuchengetedza mvura chinhu chakakosha pakuona mhando yeHPMC inoshandiswa muindasitiri yekuvaka. Muedzo uyu unobatsira kuyera nemazvo zvimiro zvekuchengetedza mvura zveHPMC kuona kuti inosangana nezvinodiwa zvechikumbiro chakapihwa. HPMC ine kuchengetwa kwemvura yakakwira, ichipa kukwidziridzwa kushanda, yakagadziridzwa chisungo, yakaderedzwa kutsemuka uye kuwedzera kusimba kune esimende zvinhu. Naizvozvo, muindasitiri yekuvaka, zvinodikanwa kuita bvunzo dzekuchengetedza mvura paHPMC kuti ive nechokwadi chemhando yechigadzirwa chekupedzisira.
Nguva yekutumira: Sep-18-2023