Hydroxypropyl methylcelluloseni eteri ya cellulose isanzwe, idateza ingaruka mbi ku mubiri w'umuntu. Ariko, ibikoresho fatizo by'ipamba na HPMC bikoreshwa mu ruganda byose ni isura, kuko ibi bigira ingaruka mbi ku mukungugu, naho ibindi ntibigira ingaruka mbi.
Hydroxypropyl methylcellulose ntabwo ari uburozi. Cellulose ifatwa nk'ikwiriye kandi itunganywa hakoreshejwe insinga zisanzwe binyuze mu guhuza alkali, guhuza, gukaraba, kumisha, gusya n'izindi nzira. Ntabwo bizashyira ubuzima bw'abantu mu kaga.
Hydroxypropyl methyl cellulose, izwi kandi ku izina rya hypromellose na cellulose hydroxypropyl methyl ether, ikorwa hakoreshejwe cellulose y’ipamba nziza cyane nk’ibikoresho fatizo kandi igakorerwa etherification yihariye mu gihe cy’imiterere ya alkaline.
Gutunganya hydroxypropyl methylcellulose: cellulose itunganyijwe ivurwa na lye kuri 35-40℃ mu gihe cy'igice cy'isaha, ikanyuzwamo, cellulose ikarangizwa, hanyuma ishaje igakorwa kuri 35℃ kugira ngo fibre ya alkali iboneke ihinduke polymer imwe. Mu rwego rukenewe. Shyira fibre ya alkali mu gikoresho cyo gupima etherification, ongeramo propylene oxide na methyl chloride bikurikiranye, hanyuma uteke kuri 50-80℃ mu gihe cy'amasaha 5, kandi igitutu cyo hejuru ni hafi 1.8MPa. Hanyuma ongeramo ingano ikwiye ya aside hydrochloric na aside oxalic kugira ngo woze ibikoresho mu mazi ashyushye kuri 90°C kugira ngo wongere ingano n'ingano. Kangura amazi ukoresheje centrifugation. Sukura kugeza ku rugero rudafite aho rubogamiye. Iyo amazi ari mu bikoresho ari munsi ya 60%, yumishe ukoresheje umwuka ushyushye kuri 130°C kugeza ku rugero ruri munsi ya 5%.
HPMC ikorwa n'uburyo bwo gukaraba ikoresha toluene na isopropanol nk'umusemburo. Iyo yogejwe nabi cyane, izagira impumuro nkeya. Iki ni ikibazo cy'uburyo bwo gukaraba, kitagira ingaruka ku ikoreshwa cyangwa ku kibazo icyo ari cyo cyose.
Hypromellose ni ipamba itunganyijwe idakunze gushyirwamo amazi kugira ngo ibone selulose ya alkaline, hanyuma ikagira uruhare mu bintu biyungurura, ibikoresho bihindura ether, toluene na isopropanol kugira ngo ihindure ether, kandi irakurwamo, yogejwe, yumishwa, ikanasenywa kugira ngo ibone ibikoresho birangiye. Ni mbi cyane kandi iranuka, bityo abayikoresha bashobora kuyikoresha mu mwuka uhamye.
Hydroxypropyl methylcellulose igomba kwitondera ibintu bikurikira biri mu ikoreshwa:
Mu ngaruka z'ifu y'ibyondo, hydroxypropyl methylcellulose igira uruhare runini gusa, kandi ntigira uruhare mu mikorere iyo ari yo yose ya shimi. Ifu y'ibyondo yongerwamo amazi igashyirwa ku rukuta, ari na yo mikorere ya shimi. Kubera ko ibintu bishya byaremwe, ifu y'ibyondo iri ku rukuta ikurwa ku rukuta igasigwa ikavamo ifu kugira ngo habeho ibintu bishya. Hydroxypropyl methylcellulose igumana amazi gusa kandi igafasha kalisiyumu y'umukara kugira igisubizo cyiza, ariko ntabwo igira uruhare mu mikorere iyo ari yo yose.
Hydroxypropyl Methyl Cellulose HPMC ntabwo igira uruhare mu mikorere iyo ari yo yose ya shimi, ahubwo ifasha gusa. Shyira amazi mu ifu y'icyondo hanyuma uyishyire ku rukuta, ni imikorere ya shimi. Kubera ko ibintu bishya byaremwe, ifu y'icyondo ku rukuta ikurwa ku rukuta igasigwa ifu, hanyuma ntibishoboka, kuko ibintu bishya byakozwe NS. Ibice by'ingenzi bya calcium y'umukara ni: Ca(OH)2, uruvange rwa CaO n'ingano nto ya CaCO3, CaO3
H2O=Ca（OH）2-Ca（OH）2 CO2=CaCO3↓ H2O
Kalisiyumu y'ikijuju ikora ibindi bintu bitewe n'amazi na CO2 mu kirere, mu gihe HPMC igumana amazi gusa kandi igafasha kalisiyumu y'ikijuju kugira igisubizo cyiza. Ntabwo igira uruhare mu gusubiza ikintu icyo ari cyo cyose.
Hydroxypropyl methyl cellulose ifite akamaro kanini. Mu buzima bwa buri munsi, ibicuruzwa byinshi ntibitandukanywa n'uburyo bwo kubitunganya. Hanyuma, mu nganda zitandukanye, ingaruka za hydroxypropyl methylcellulose ni izihe, nzabigusobanurira, kugira ngo wirinde kuyikoresha nabi mu gihe urimo urushaho kugira ubumenyi.
Mbere na mbere, mu nganda z'ubwubatsi, ishobora gufatwa nk'ikintu kigabanya amazi kandi kiyifata. Imodoka y'ibumba irashobora kuvomwa, bityo imodoka yose yumye dukoresha igira uruhare rwayo. Byongeye kandi, mu bikoresho by'ubwubatsi nka gypsum mbisi, plaster, n'ifu y'ibyondo, ishobora gukoreshwa nk'icyuma gifunga, kitamara igihe cyo gukora gusa, ahubwo kinatuma irangi rirushaho gusigwa. Mu mabuye ya marble, amatafari ya ceramic adhesive, imitako ya pulasitiki ivanze, ishobora gukoreshwa nk'icyuma gikomeza gufatana, nibindi. Dushobora kuvuga ko hydroxypropyl methyl cellulose izwi cyane kubera ubuhanga bwayo mu bikoresho by'ubwubatsi.
Mu zindi nganda, nko gukora porcelain n'ibibumbano, ishobora gukoreshwa nk'ubudodo mu gukora porcelain n'ibibumbano; mu nganda za lacquer no gucapa wino, ishobora gukoreshwa nk'ifu ifunguye, ikungahaye ku bukonje, itera imbaraga, ndetse no kubera ko ishobora kuvangwa n'ibinyabutabire cyangwa amazi bivanze neza, kandi ishobora gukoreshwa nk'umuti ukuraho irangi mu gukora plastiki ivanze, ndetse n'ibinyoroshya, ibintu birekura ibumba, amavuta, nibindi; mu gukora polyvinyl chloride, ifatwa nk'ifu ifunguye.
Ibikoresho bikozwe muri hydroxypropyl methylcellulose bikoreshwa cyane mu gutunganya imbuto n'imboga, imiti, uruhu rw'inyamaswa n'inganda z'imyenda. Ni byiza kandi ntabwo ari uburozi, ntabwo bibabaza cyane umubiri w'umuntu, ndetse bishobora no gukoreshwa nk'inyongeramusaruro ku biribwa. Ariko, mu by'ukuri, umukungugu wayo ushobora gutera umwanda w'ikirere, kandi ntacyo bimaze kubungabungwa ku ruhu kugira ngo rutibasira umuriro.
kubika amazi
Hydroxypropyl methylcellulose yihariye yo kubaka yirinda ikoreshwa ryinshi ry'amazi n'ubutaka, kandi amazi agomba kubikwa mu gishishwa uko bishoboka kose mu gihe gypsum yamaze gushyirwaho burundu. Uyu muco wihariye witwa kubika amazi kandi ujyanye neza n'ubukana bw'umuti wa hydroxypropyl methylcellulose ukoreshwa mu kubaka muri gishishwa. Uko ubukana bw'umuti buba bwinshi, niko ubukana bw'amazi buba bwinshi.
Kurwanya kugwa
Urusenda rufite imiterere yihariye yo kurwanya kugwa rushobora gushyirwaho irangi rinini ritagwa, bivuze kandi ko urusenda ubwarwo rudahindura igitsina cyarwo, bitabaye ibyo ruzamanuka igihe imirimo yo kubaka itangiye.
Kugabanya ubukana bw'ibintu kandi byorohereze kubaka
Nyuma yo kongeramo ibintu bitandukanye bya hydroxypropyl methylcellulose byihariye mu bwubatsi, plaster y'icyatsi kibisi ifite imiterere yoroheje irashobora gukorwa. Iyo ibonetse ko ikwiye kandi hagakoreshwa hydroxypropyl methylcellulose ifite urwego rwo hasi rw'ubushyuhe bw'ubwubatsi, urwego rw'ubushyuhe ruragabanuka kandi kubaka biroroha. Ariko, kubika amazi kwa hydroxypropyl methylcellulose mu bwubatsi bufite ubushyuhe buke ni bike, kandi ni ngombwa kongera ingano y'inyongera.
Igipimo cyo guhuza pulasitiki
Ku gipimo gihoraho cya morti yumye, birahendutse cyane gukora morti yumye ingano nyinshi, ibyo bikaba byagerwaho wongeyeho amazi make n'udupfundo. Ariko, iyo ingano y'amazi n'udupfundo ari ndende cyane, imbaraga ziragabanuka.
Igihe cyo kohereza: 26 Mata 2024