Hydroxypropyl methylcelluloseiine selulosi ether inongoitika, isingakuvadzi muviri wemunhu. Zvisinei, zvigadzirwa zvekotoni linters uye HPMC inoshandiswa mufekitari zvose zvinotarisana, nokuti izvi zvichava nemigumisiro yeguruva, uye mamwe haasi kukuvadza.
Hydroxypropyl methylcellulose haina chepfu. Cellulose inoonekwa seyakakodzera uye inogadziriswa nekushandisa zvinongoitika fibers kuburikidza nealkali fusion, grafting mhinduro, kugeza, kuomesa, kugaya uye mamwe maitiro. Hazvizoise hutano hwevanhu pangozi.
Hydroxypropyl methyl cellulose, inozivikanwawo se hypromellose uye cellulose hydroxypropyl methyl ether, inogadzirwa nekushandisa yakanyanya kuchena donje cellulose seyakagadzirwa uye ichiitwa yakakosha etherification pasi pemamiriro ealkaline.
Iyo synthesis yehydroxypropyl methylcellulose: iyo yakacheneswa donje cellulose inobatwa nelye pa35-40 ℃ kwehafu yeawa, yakasvinwa, cellulose inopwanyika, uye kuchembera kunoitwa pa35 ℃ kuita yakawanikwa alkali fiber yakafanana polymerized. Mukati mechikamu chinodiwa. Isa iyo alkali faibha muketero ye etherification, wedzera propylene oxide uye methyl chloride mukutevedzana, uye etherify pa50-80 ℃ ye5h, uye kudzvanywa kwepamusoro kunosvika 1.8MPa. Zvadaro wobva wawedzera huwandu hwakakodzera hwehydrochloric acid uye oxalic acid kushambidza zvinhu mumvura inopisa pa 90 ° C kuti uwedzere hukuru uye huwandu. Dehydrate ne centrifugation. Swash kusvika kune kwaakarerekera. Kana mvura iri muzvinhu iri pasi pe60%, iomese nerukova rwemhepo inopisa pa130 ° C kusvika kune zvishoma kudarika 5%.
Iyo HPMC inogadzirwa nenzira yekunyungudutsa inoshandisa toluene uye isopropanol sechinhu chinonyungudutsa. Kana yakashambidzwa zvakanyanya, inenge iine kakunhuhwira kakasara. Iri idambudziko rekushambidzika, iro risingakanganisi kushandiswa kana chero dambudziko.
Hypromellose idonje rakanatswa iro risingawanzo kuisirwa nemvura kuti riwane alkaline cellulose, uyezve rinotora chikamu mune zvinonyungudutsa, etherification agents, toluene uye isopropanol kuitira etherification reactions, uye haipindiri, kugezwa, kuomeswa, uye kupwanywa kuti uwane zvigadzirwa zvapera. Yakashata kwazvo uye inonhuwa, saka vashandisi vanogona kuishandisa mune yakagadzikana mood.
Hydroxypropyl methylcellulose inofanirwa kutarisisa kune zvinotevera zvinhu mukushandisa:
Mukuita kwehupfu hwedope, hydroxypropyl methylcellulose inongoridza chete chinotsigira, uye haibatanidzi mune chero makemikari anoita. Upfu hwedhaka hunowedzerwa nemvura uye hunoiswa pamadziro, iyo inonzi chemical reaction. Nekuda kwekuumbwa kwezvinhu zvitsva, hupfu hwedhaka pamadziro hunobviswa pamadziro uye hunogayiwa kuita hupfu kuita zvinhu zvitsva. Hydroxypropyl methylcellulose inongochengeta mvura uye inobatsira grey calcium kuti ive nemhinduro iri nani, asi haipindiri mune chero mhinduro.
Hydroxypropyl Methyl Cellulose HPMC haitore chikamu mune chero chemakemikari maitiro, asi inobatsira chete. Wedzera mvura kuhupfu hwedhaka uye uiise pamadziro, iyo inonzi chemical reaction. Nemhaka yekuumbwa kwezvinhu zvitsva, hupfu hwedhaka pamadziro hunobviswa kubva pamadziro uye pasi kuva upfu, uye zvino hazvigoneki, nokuti zvinhu zvitsva zvakaumbwa NS. Izvo zvikamu zvikuru zvegrey calcium powder ndezvi: Ca (OH) 2, musanganiswa weCaO uye zvishoma zveCaCO3, CaO
H2O=Ca(OH)2-Ca(OH)2 CO2=CaCO3↓ H2O
Grey calcium inobereka zvimwe zvinhu pasi pekuita kwemvura uye CO2 mumhepo, nepo HPMC inongochengeta mvura uye inobatsira grey calcium kuti ive nemhinduro iri nani. Haina kutora chikamu mune chero mhinduro.
Hydroxypropyl methyl cellulose ine huwandu hwakawanda hwekushandisa. Muhupenyu hwezuva nezuva, zvigadzirwa zvakawanda hazviparadzanisiki kubva pakugadzira nzira. Zvadaro, mumaindasitiri akasiyana-siyana, chii chinokonzera hydroxypropyl methylcellulose, ini ndichakutsanangurira, kuitira kuti iwe ugone kudzivirira kushandiswa zvisina kunaka paunenge uchiwana ruzivo.
Chekutanga pane zvese, muindasitiri yekuvaka, inogona kutariswa seyakadzora uye inochengetedza mvura. Iyo dhaka inopomba, saka dhaka rose rakaoma ratinoshandisa rine chekuita kwaro. Pamusoro pezvo, mumidziyo yekuvaka senge gypsum mbishi, plaster, uye dope poda, inogona kushandiswa sebhainda, iyo isingangowedzere nguva yekushanda, asiwo inoita kuti pendi iwedzere kusvibiswa. Mune marble, adhesive ceramic tiles, molecular compound plastic decorations, inogona kushandiswa sechinhu chinonamira, etc. Zvinogona kutaurwa kuti hydroxypropyl methyl cellulose ndiyo inonyanya kuzivikanwa nokuda kwekusiyana-siyana kwezvinhu zvekuvaka.
Mune mamwe maindasitiri, senge porcelain uye kugadzira kwehari, inogona kushandiswa seyakanamatira yekugadzira porcelain uye zvigadzirwa zvehari; muindasitiri yelacquer uye inki kudhinda, inogona kushandiswa sehupfu yakasununguka, thickener, stabilizer, uye kunyangwe nekuti inogona kusanganiswa ne organic Solvent kana mvura inosanganiswa zvakanaka, uye inogona kushandiswa seyekubvisa pendi mukugadzira mapurasitiki akasanganiswa. , pamwe chete nemanyoro, mold release agents, lubricant, nezvimwewo; mukugadzirwa kwepolyvinyl chloride, inoonekwa sehupfu hwakasununguka.
Zvigadzirwa zvakagadzirwa nehydroxypropyl methylcellulose zvinoshandiswa zvakanyanya mukutsva kwemichero nemiriwo, mushonga, matehwe emhuka uye maindasitiri emachira. Iyo yakachengeteka uye isina-chepfu, isinganyanyi kutsamwisa muviri wemunhu mucous membranes uye matehwe, uye inogona kushandiswa sechikafu chekuwedzera. Zvisinei, mumamiriro ezvinhu chaiwo enyaya yacho, guruva rayo rinogona kukonzera kusvibiswa kwemhepo, uye hazvibatsiri kuchengetedza ganda kuti riparadzanise kubva pamoto kuti urege kuputika.
kuchengetedza mvura
Iyo yakakosha hydroxypropyl methylcellulose yekuvaka inodzivirira kushandiswa kwakanyanya kwemvura neiyo substrate, uye mvura inofanirwa kuchengetwa mupurasita zvakanyanya sezvinobvira panguva iyo gypsum yakanyatsogadziriswa. Iyi yakakosha pfuma inonzi kuchengetwa kwemvura uye yakanangana neiyo viscosity yehydroxypropyl methylcellulose mhinduro inoshandiswa pakuvaka mupurasita. Iyo yakakwirira iyo mhinduro viscosity, iyo yakakwirira yekuchengeta mvura ruzivo.
Anti-sagging
Iyo dhaka ine yakakosha zvimiro zve-anti-sagging inogona kuiswa neyakakora coating isina sagging, izvo zvinoreva zvakare kuti dhaka pacharo harichinje gender, zvikasadaro inotsvedza pasi kana kuvaka kwatanga.
Deredza viscosity uye fambisa kuvaka
Mushure mekuwedzera akasiyana ekuvaka-chaiyo hydroxypropyl methylcellulose zvigadzirwa, yakasvibira gypsum plaster ine zvinyoro viscous maitiro inogona kugadzirwa. Kana ichionekwa seyakakodzera uye yakaderera-viscosity giredhi yekuvaka-yakananga hydroxypropyl methylcellulose inoshandiswa, Iyo dhigirii yeviscosity inoderedzwa uye kuvaka kunova nyore. Zvisinei, kuchengetwa kwemvura yehydroxypropyl methylcellulose yekuvaka-yakadzika-viscosity inenge isina simba, uye inofanirwa kuwedzera huwandu hwekuwedzera.
Plastiki kuenderana mwero
Nokuda kwehuwandu hwakatarwa hwedhaka rakaoma, zvinowedzera hupfumi kuti hubudise huwandu hwehutu hwehutu hwepamusoro, hunogona kuwanikwa nekuwedzera mvura shoma uye mabhubhu. Zvisinei, kana kuwanda kwemvura uye mabhubhu akareba, simba racho harina simba.
Nguva yekutumira: Kubvumbi-26-2024