Hydroxypropyl methylcelluloseni selile isanzwe ya selile, ntabwo yangiza umubiri wumuntu. Nyamara, ibikoresho fatizo byimyenda ya pamba na HPMC bikoreshwa muruganda byose birasa, kuko ibi bizagira ingaruka kumukungugu, nibindi ntabwo byangiza.
Hydroxypropyl methylcellulose ntabwo ari uburozi. Cellulose ifatwa nkibikwiye kandi itunganywa hakoreshejwe fibre isanzwe iboneka binyuze muri alkali fusion, igisubizo cyo gushushanya, gukaraba, gukama, gusya nibindi bikorwa. Ntabwo bizabangamira ubuzima bwabantu.
Hydroxypropyl methyl selulose, izwi kandi nka hypromellose na selulose hydroxypropyl methyl ether, ikorwa hifashishijwe selile yipamba nziza cyane nkibikoresho fatizo kandi ikorerwa etherifike idasanzwe mubihe bya alkaline.
Synthesis ya hydroxypropyl methylcellulose: selile nziza yatunganijwe ivurwa na lye kuri 35-40 ℃ mugihe cyigice cyisaha, ikanyunyuzwa, selile ikajanjagurwa, kandi gusaza bigakorwa kuri 35 ℃ kugirango fibre ya alkali yabonetse ibe polymerime imwe. Mubisabwa. Shira fibre ya alkali mumasafuriya ya etherification, ongeramo okiside ya propylene na methyl chloride ikurikiranye, hanyuma etherify kuri 50-80 ℃ kuri 5h, naho umuvuduko wo hejuru ni 1.8MPa. Noneho shyiramo urugero rukwiye rwa acide hydrochloric na aside oxyde yoza ibikoresho mumazi ashyushye kuri 90 ° C kugirango wongere ubunini nubunini. Umwuma ukoresheje centrifugation. Swash to neutre. Iyo amazi arimo mubikoresho ari munsi ya 60%, yumisha hamwe numugezi wumuyaga ushyushye kuri 130 ° C kugeza kubiri munsi ya 5%.
HPMC yakozwe nuburyo bwo gukemura ikoresha toluene na isopropanol nkigisubizo. Niba yogejwe nabi cyane, izaba ifite umunuko usigaye. Iki nikibazo cyo gukaraba, ntabwo bigira ingaruka kumikoreshereze cyangwa ikibazo icyo aricyo cyose.
Hypromellose ni ipamba inonosoye idakunze kwinjizwa mumazi kugirango ibone selile ya alkaline, hanyuma ikagira uruhare mumashanyarazi, imiti ya etherification, toluene na isopropanol kugirango ibe reaction ya etherification, kandi itabangamiwe, irakaraba, yumishwa, kandi irajanjagurwa kugirango ibone ibicuruzwa byarangiye. Nibyiza cyane kandi binuka, abakoresha rero barashobora kuyikoresha mumutima uhamye.
Hydroxypropyl methylcellulose igomba kwitondera ibintu bikurikira mubisabwa:
Ingaruka yifu yicyondo, hydroxypropyl methylcellulose igira ingaruka gusa, kandi ntabwo yitabira imiti iyo ari yo yose. Ifu yicyondo yongewemo namazi hanyuma igashyirwa kurukuta, ni reaction ya chimique. Kubera imiterere yibintu bishya, ifu yicyondo kurukuta ikurwa kurukuta nubutaka ihinduka ifu kugirango ibe ibintu bishya. Hydroxypropyl methylcellulose igumana amazi gusa kandi ifasha calcium yumukara kugira igisubizo cyiza, ariko ntabwo yitabira igisubizo icyo aricyo cyose.
Hydroxypropyl Methyl Cellulose HPMC ntabwo yitabira imiti iyo ari yo yose, ariko ifasha gusa. Ongeramo amazi kumashanyarazi hanyuma uyashyire kurukuta, ni reaction ya chimique. Kubera gushiraho ibintu bishya, ifu yicyondo kurukuta ikurwa kurukuta nubutaka ihinduka ifu, hanyuma ntibishoboka, kuko ibintu bishya byakozwe NS. Ibyingenzi byingenzi byifu ya calcium yifu ni: Ca (OH) 2, imvange ya CaO hamwe na CaCO3 nkeya, CaO
H2O = Ca （OH） 2-Ca （OH） 2 CO2 = CaCO3 ↓ H2O
Kalisiyumu yumukara itanga ibindi bintu bitewe namazi na CO2 mukirere, mugihe HPMC igumana amazi gusa kandi ifasha calcium yumukara kugira igisubizo cyiza. Ntabwo yitabira igisubizo icyo ari cyo cyose.
Hydroxypropyl methyl selulose ifite uburyo bwinshi bwo gukoresha. Mubuzima bwa buri munsi, ibicuruzwa byinshi ntibishobora gutandukana nuburyo bwo gukora. Noneho, mu nganda zitandukanye, ni izihe ngaruka za hydroxypropyl methylcellulose, nzagusobanurira, kugirango ubashe kwirinda kuyikoresha nabi mugihe wungutse ubumenyi.
Mbere ya byose, mubikorwa byubwubatsi, birashobora gufatwa nkumukozi udindiza kandi ugumana amazi. Amabuye ya minisiteri arashobora kuvomwa, kubwibyo byose byumye dukoresha bifite uruhare. Byongeye kandi, mubikoresho byubwubatsi nka gypsumu mbisi, plaster, nifu yicyondo, irashobora gukoreshwa nka binder, ntabwo yongerera igihe cyo gukora gusa, ahubwo inatuma irangi risigara neza. Muri marble, amatafari ya ceramic yometseho, imitako ya pulasitike yububiko bwa plastike, irashobora gukoreshwa nkongera imbaraga za adhesion, nibindi. Birashobora kuvugwa ko hydroxypropyl methyl selulose izwi cyane kubera byinshi mubikoresho byubaka.
Mu zindi nganda, nk'ibikoresho bya farufari n'ibibumbano, birashobora gukoreshwa nk'ibiti bifatika byo gukora farufari n'ibibumbano; mu nganda za lacquer no gucapa wino, irashobora gukoreshwa nkifu yifunguye, ikabyimbye, stabilisateur, ndetse niyo ishobora guhuzwa na Solvent organic cyangwa amazi ivanze neza, kandi irashobora gukoreshwa mugukuraho amarangi mugukora plastike ivanze ya molekile. , kimwe no koroshya, ibikoresho byo kurekura ibicuruzwa, amavuta, nibindi.; mugukora chloride ya polyvinyl, ifatwa nkifu ya fu.
Ibicuruzwa bikozwe muri hydroxypropyl methylcellulose bikoreshwa cyane mugushya kwimbuto n'imboga, ubuvuzi, uruhu rwinyamaswa ninganda zimyenda. Ni umutekano kandi ntabwo ari uburozi, ntabwo irakaza cyane umubiri wumuntu wijimye hamwe nimpu, ndetse birashobora no gukoreshwa nkibiryo byongera ibiryo. Nyamara, mubihe nyabyo byikibazo, umukungugu wacyo urashobora gutera umwanda, kandi ntabwo ari byiza kubungabunga uruhu kugirango rutandukane numuriro kugirango wirinde guturika.
kubika amazi
Hydroxypropyl methylcellulose idasanzwe yo kubaka irinda gukoresha amazi cyane na substrate, kandi amazi agomba kubikwa muri pompa bishoboka cyane mugihe gypsumu yashizweho burundu. Uyu mutungo udasanzwe witwa kubika amazi kandi ugereranije neza nubwiza bwumuti wa hydroxypropyl methylcellulose ukoreshwa mubwubatsi muri plaster. Iyo igisubizo kiboneye cyane, nuburambe bwo gufata amazi.
Kurwanya kugabanuka
Minisiteri ifite ibintu byihariye birwanya anti-sagging irashobora gukoreshwa hamwe nigitambaro kinini cyane itanyeganyega, bivuze kandi ko minisiteri ubwayo idahindura igitsina cyayo, bitabaye ibyo ikanyerera mugihe ubwubatsi butangiye.
Mugabanye ububobere no koroshya kubaka
Nyuma yo kongeramo ibintu bitandukanye byubaka hydroxypropyl methylcellulose, plaque yicyatsi kibisi ifite imyifatire yoroheje yoroheje irashobora kubyara. Iyo bibonetse ko bikwiye kandi urwego rwo hasi-rwijimye rwubwubatsi bwihariye hydroxypropyl methylcellulose ikoreshwa, Urwego rwimitsi iragabanuka kandi kubaka biroroha. Nyamara, kugumana amazi ya hydroxypropyl methylcellulose kugirango yubake-viscosity nkeya birasa nkintege nke, kandi birakenewe kongera umubare winyongera.
Igipimo cyo guhuza plastike
Kubwinshi buteganijwe bwa minisiteri yumye, nibyiza cyane kubyara ubunini buke bwa minisiteri, bishobora kugerwaho wongeyeho amazi make ninshi. Ariko, niba ubwinshi bwamazi nububyimba ari birebire, imbaraga zangirika.
Igihe cyo kohereza: Apr-26-2024