Hydroxypropylmethylcellulose (HPMC) iri kuwana mukurumbira muindasitiri yekuvaka nekuda kwekunaka kwayo kwekuchengetedza mvura. HPMC isiri-ionic, mvura-soluble cellulose ether, iyo inoshandiswa zvakanyanya mumaindasitiri akasiyana-siyana. Mukuvaka, inowanzoshandiswa seyakakora, bhainda uye inochengetedza mvura mumidziyo yesamende uye madhaka. Iko kunaka kweHPMC zvakare kune imwe mhedzisiro pakuita kwayo kuchengetedza mvura, iyo yatichaongorora mune ino chinyorwa.
Kutanga, zvakakosha kuti unzwisise kuti HPMC chii uye kuti inoshanda sei. HPMC inotorwa kubva kune cellulose, yakasikwa polima inotorwa kubva muhuni uye chirimwa fiber. HPMC inogadzirwa nemakemikari ekuchinja cellulose ine propylene oxide uye methyl chloride, iyo inowedzera hydroxypropyl uye methyl mapoka kune cellulose molecule. Kugadziridzwa uku kunoita kuti HPMC inyungudika mumvura uye inoipa chaiyo zvinhu zvakaita sekukora, emulsification uye kuchengetedza mvura.
Iwo ekuchengetedza mvura zvivakwa zveHPMC akanyanya kukosha muindasitiri yekuvaka, uko kudzora hunyoro kwakakosha. Kana HPMC yawedzerwa kune cementitious zvinhu kana dhaka, inoumba firimu rakatenderedza masimende, ichideredza kupinda kwemvura. Iyo firimu inobatsirawo kunonoka kubuda kwemvura kubva mumusanganiswa, ichipa simenti nguva yakawanda yekunyorova. Nekuda kweizvozvo, cementitious zvinhu uye dhaka zvinoramba zvakanyorova kwenguva yakareba, zvichivabvumira kurapa nemazvo uye kuwana simba rakawanda.
Iko kunaka kweHPMC kunoita basa rakakosha mukuchengetedza kwayo mvura. Kazhinji kutaura, iyo yakatsetseka iyo HPMC zvimedu, zviri nani kuchengetedza mvura. Izvi zvinodaro nekuti zvidimbu zvidiki zvine nzvimbo yakakura yepamusoro, izvo zvinovatendera kuti vagadzire firimu rakakura rakatenderedza masimende. Iyo firimu inobatsira kugadzira chipingamupinyi pakati pesimenti nemvura, inononoka kupinda kwemvura mumusanganiswa. Somugumisiro, musanganiswa wacho unoramba wakanyorova kwenguva refu, uchipa nguva yakawanda yokuti simende iite mvura uye dhaka kuti ripore.
Asi zvakakosha kucherechedza kuti kunaka kweHPMC hakufanirwe kunge kuri kutariswa chete pakusarudza mumiriri wemvura. Zvimwe zvinhu zvakaita sesimende mhando, mvura-simende reshiyo, tembiricha uye humidity zvinokanganisawo kuchengetedza mvura kweHPMC. Naizvozvo, zvakakosha kusarudza iyo HPMC chigadzirwa chakakodzera kune chaiyo application uye kushandisa nharaunda.
Muchidimbu, kune akawanda mabhenefiti ekushandisa HPMC sechinhu chekuchengetedza mvura mune simende zvinhu uye madhaka. Kuchengetedza kwayo mvura kunoita kuti musanganiswa urambe wakanyorova kwenguva yakareba, zvichipa nguva yakawanda yekuti simende iite mvura uye dhaka kuti ripore. Iko kunaka kweHPMC chinhu chakakosha chinokanganisa kugona kwayo kuchengetedza mvura, iyo yakatsetseka zvidimbu, zvirinani kuita. Nekudaro, zvimwe zvinhu zvakaita sesimende mhando, mvura-simende ratio, tembiricha uye hunyoro zvinofanirwa kutariswa pakusarudza chigadzirwa cheHPMC. Pakazere, kushandisa HPMC inzira yakanaka yekuvandudza mashandiro uye hupenyu hurefu hwesimende zvinhu uye dhaka muindasitiri yekuvaka.
Nguva yekutumira: Aug-16-2023