Hydroxypropyl methylcellulosei cellulose ether inowanikwa zvakasikwa, iyo isingakuvadzi muviri wemunhu. Zvisinei, zvinhu zvakagadzirwa nedonje remachira neHPMC zvinoshandiswa mufekitori zvese zvine chekuita neganda, nekuti izvi zvine chekuita neguruva, uye zvimwe hazvina kuipa.
Hydroxypropyl methylcellulose haina chepfu. Cellulose inoonekwa seyakakodzera uye inogadziriswa nekushandisa fibers dzinongoitika dzega kuburikidza nekubatanidza alkali, kusanganisa, kugeza, kuomesa, kukuya nezvimwewo. Hazvizoisi panjodzi hutano hwevanhu.
Hydroxypropyl methyl cellulose, inozivikanwawo se hypromellose uye cellulose hydroxypropyl methyl ether, inogadzirwa nekushandisa cotton cellulose yakachena kwazvo sezvinhu zvisina kugadzirwa uye inopiswa ne etherification yakakosha pasi pemamiriro e alkaline.
Kugadzirwa kwehydroxypropyl methylcellulose: cellulose yedonje yakanatswa inorapwa ne lye pa35-40℃ kwehafu yeawa, yosvinwa, cellulose inopwanywa, uye kuchembera kunoitirwa pa35℃ kuti alkali fiber yakawanikwa ive polymer yakafanana. Mukati mehuwandu hunodiwa. Isa alkali fiber mukettle ye etherification, wedzera propylene oxide ne methyl chloride zvakatevedzana, uye etherify pa50-80℃ kwemaawa mashanu, uye kumanikidzwa kwepamusoro kunenge 1.8MPa. Wobva wawedzera huwandu hwakakodzera hwe hydrochloric acid ne oxalic acid kuti usuke zvinhu mumvura inopisa pa90°C kuti uwedzere saizi uye vhoriyamu. Dehydrate ne centrifugation. Suka kusvika yakamira. Kana huwandu hwemvura muzvinhu zviri pasi pe60%, huome nerukova rwemhepo inopisa pa130°C kusvika pasi pe5%.
HPMC inogadzirwa nenzira yekunyungudutsa inoshandisa toluene neisopropanol semunyungudutsa. Kana ikagezwa zvakanyanya, inenge yasara nekunhuhwirira. Iri idambudziko remagadzirirwo ekugeza, izvo zvisingakanganisi kushandiswa kana chero dambudziko.
Hypromellose idonje rakanatswa risingawanzoiswa mvura kuti riwane alkaline cellulose, uye rinozobatanidzwa muzvinonyungudutsa, zvinosanganisa etherification, toluene neisopropanol kuti riite etherification, uye rinobviswa simba, rinogezwa, rinoomeswa, uye rinopwanywa kuti riwane zvigadzirwa zvakapedzwa. Rakaipa uye rinonhuwa, saka vashandisi vanogona kurishandisa vakagadzikana.
Hydroxypropyl methylcellulose inofanira kutarisisa zvinhu zvinotevera zviri mukushandiswa:
Mukushanda kwehupfu hwematope, hydroxypropyl methylcellulose inongotsigira chete, uye haibatanidzwi mune chero reaction yemakemikari. Hupfu hwematope hunowedzerwa nemvura uye hunoiswa pamadziro, inova reaction yemakemikari. Nekuda kwekuumbwa kwezvinhu zvitsva, hupfu hwematope pamadziro hunobviswa pamadziro uye hunokuyiwa kuita hupfu kuti hugadzire zvinhu zvitsva. Hydroxypropyl methylcellulose inongochengetedza mvura uye inobatsira gray calcium kuti ive nemhinduro iri nani, asi haibatanidzwi mune chero mhinduro.
Hydroxypropyl Methyl Cellulose HPMC haibatanidzi mukuita kwemakemikari, asi inobatsira chete. Wedzera mvura kuhupfu hwematope woiisa pamadziro, inyaya yemakemikari. Nekuda kwekuumbwa kwezvinhu zvitsva, hupfu hwematope pamadziro hunobviswa pamadziro hwobva hwakuyiwa kuita hupfu, uye hazvigoneke, nekuti zvinhu zvitsva zvagadzirwa NS. Zvikamu zvikuru zvehupfu hwe calcium grey ndeizvi: Ca(OH)2, musanganiswa weCaO uye huwandu hushoma hweCaCO3, CaO3
H2O=Ca（OH）2-Ca（OH）2 CO2=CaCO3↓ H2O
Kalisiyumu yegrey inogadzira zvimwe zvinhu pasi pesimba remvura neCO2 mumhepo, nepo HPMC inongochengeta mvura chete uye inobatsira kalisiyumu yegrey kuti ive nemhinduro iri nani. Haibatanidzwi mune chero mhinduro.
Hydroxypropyl methyl cellulose ine mashandisirwo akasiyana-siyana. Muhupenyu hwezuva nezuva, zvigadzirwa zvakawanda hazviparadzanisike kubva mukugadzirwa. Zvadaro, mumaindasitiri akasiyana, chii chinoita kuti hydroxypropyl methylcellulose ishande, ndichakutsanangurirai, kuitira kuti mugone kudzivirira kushandiswa kwayo zvisina kunaka muchiwana ruzivo.
Chekutanga, muindasitiri yekuvaka, inogona kuonekwa sechinhu chinodzoreredza mvura uye chinochengetedza mvura. Dura remuto rinopombwa, saka dura rese rakaoma ratinoshandisa rine chekuita naro. Pamusoro pezvo, muzvinhu zvekuvaka zvakaita segypsum isina kugadzirwa, plaster, uye mud powder, inogona kushandiswa se binder, iyo isingangowedzere nguva yekushanda chete, asiwo inoita kuti pendi inyatso smear. Mumarble, adhesive ceramic tiles, molecular compound plastic decorations, inogona kushandiswa se adhesion enhancer, nezvimwewo. Zvinogona kutaurwa kuti hydroxypropyl methyl cellulose ndiyo inonyanya kuzivikanwa nekushanda kwayo muzvinhu zvekuvaka.
Mune mamwe maindasitiri, akadai sekugadzira porcelain nehari, inogona kushandiswa sechinamira chekugadzira porcelain nehari; muindasitiri yelacquer nekudhinda inki, inogona kushandiswa sehupfu hwakareruka, chinosimbisa, uye kunyangwe nekuti inogona kusanganiswa neorganic Solvent kana mvura inosanganiswa zvakanaka, uye inogona kushandiswa semushonga wekubvisa pendi mukugadzira mapurasitiki emolecular compound, pamwe nezvinonyorovesa, zvinosunungura mold, mafuta ekuwedzera, nezvimwewo; mukugadzira polyvinyl chloride, inoonekwa sehupfu hwakareruka.
Zvigadzirwa zvakagadzirwa nehydroxypropyl methylcellulose zvinoshandiswa zvakanyanya mukugadzira michero nemiriwo, mishonga, matehwe emhuka nemaindasitiri emachira. Hazvina njodzi uye hazvina chepfu, hazvinyanyi kushungurudza muviri wemunhu, uye zvinogona kushandiswa sechikafu chinowedzera. Zvisinei, mumamiriro ezvinhu chaiwo ezvinhu, guruva rayo rinogona kukonzera kusvibiswa kwemhepo, uye hazvibatsiri kuchengetedza ganda kuti ribve pamoto kudzivirira kuputika.
kuchengetwa kwemvura
Iyo hydroxypropyl methylcellulose yakakosha yekuvaka inodzivisa kushandiswa kwakanyanya kwemvura ne substrate, uye mvura inofanira kuchengetwa mu plaster zvakanyanya sezvinobvira panguva iyo gypsum yakanyatsogadzirwa. Hunhu uhwu hunokosha hunonzi kuchengetedza mvura uye hunoenderana zvakananga nekusimba kwe hydroxypropyl methylcellulose solution inoshandiswa pakuvaka mu plaster. Kana viscosity yemhinduro yakakwira, ruzivo rwekuchengetedza mvura rwakakwira.
Kudzivirira kudonha
Dhaka rine hunhu hwakakosha hwekudzivirira kudonha kwemvura rinogona kuiswa nejira rakakora risingatsvedzerere, zvinorevawo kuti dhaka pacharo harichinje hunhu hwaro, zvikasadaro richatsvedza pasi kana kuvakwa kwatanga.
Deredza kusviba uye batsira kuvaka
Mushure mekuwedzera zvigadzirwa zvakasiyana-siyana zve hydroxypropyl methylcellulose zvakagadzirwa, plaster ye gypsum yegirini ine chimiro chakapfava inogona kugadzirwa. Kana zvikaonekwa zvakakodzera uye hydroxypropyl methylcellulose inoshandiswa ine mazinga akaderera ekusviba, mwero wekusviba unodzikira zvishoma uye kuvaka kunova nyore. Zvisinei, kuchengetedza mvura kwe hydroxypropyl methylcellulose pakuvaka kusina kusviba zvishoma, uye zvakakosha kuwedzera huwandu hwekuwedzerwa.
Mwero wekuenderana kwepurasitiki
Kana paine huwandu hwakatarwa hwedhaka rakaoma, zvinodhura kugadzira dhaka rakanyorova rakakura, izvo zvinogona kuwanikwa nekuwedzera mvura shoma nemabhuru. Zvisinei, kana huwandu hwemvura nemabhuru hwakareba zvakanyanya, simba rinodzikira.
Nguva yekutumira: Kubvumbi-26-2024