Hydroxypropyl methylcelluloseIngabe okwenzeka ngokwemvelo i-cellulose ether, engenangozi emzimbeni womuntu. Kodwa-ke, izinto zokwenziwa ezivuthiwe zokotoni kanye ne-HPMC ezisetshenzisiwe efektri zonke ubuso, ngoba lokhu kuzoba nomphumela wothuli, kanti abanye abanangozi.
I-Hydroxypropylm methylcellulose ayilona ubuthi. I-cellulose ibhekwa njengefanele futhi iyacutshungulwa ngokusebenzisa imicu eyenzeka ngokwemvelo ngokusebenzisa i-Alkali Fusion ngokusebenzisa impendulo, ukugeza, ukomisa, ukugaya nezinye izinqubo. Ngeke ubeke impilo yabantu engozini.
I-Hydroxypropyl Methyl Cellulose, eyaziwa nangokuthi i-Hypromellose kanye ne-cellulose hydroxypropylyl methyl, kwenziwa ngokusebenzisa i-cellulose emsulwa kakhulu ukotini njengezinto ezibonakalayo ezikhethekile ngaphansi kwezimo ze-alkali.
Ukuhlanganiswa kwe-Hydroxypropyll Methylcellosi Ngaphakathi kwebanga elidingekayo. Beka i-alkali fiber ku-kettle yokuthethelwa, engeza i-propelene oxide kanye ne-methyl chloride ngokulandelana, futhi uthele ku-50-80 ℃ ngo-5h, futhi ingcindezi ephezulu imayelana ne-1.8MPA. Ngemuva kwalokho engeza inani elifanele le-hydrochloric acid ne-acid oxalic ukugeza izinto emanzini ashisayo ku-90 ° C ukwandisa usayizi nevolumu. Dohydrate nge-centrifugation. Swash ukungathathi hlangothi. Lapho okuqukethwe kwamanzi okuqukethwe kungaphansi kwama-60%, komise ngokusakazwa komoya oshisayo ku-130 ° C kuya kokuqukethwe okungaphansi kuka-5%.
I-HPMC ekhiqizwa yi-Solvent Way isebenzisa i-Tolune ne-Syopropanol njenge-solvent. Uma igezwa kabi kakhulu, izoba nephunga elisele kancane. Le yinkinga yenqubo yokuwasha, engakuthinti ukusetshenziswa noma iyiphi inkinga.
I-Hypromellose yikotoni elicwengekile elingakaze lifakwe ngoketshezi ukuthola i-alkaline cellulose, bese ibamba iqhaza kuma-solves, futhi athambisene ne-isopropanol ngokuphendula okuthe xaxa, futhi ayihlanzwa, eyomile, futhi ichoboziwe ukuthola imikhiqizo eqediwe. Kubi kakhulu futhi kunamampunge, ngakho-ke abasebenzisi bangayisebenzisa esimweni esizinzile.
I-Hydroxypropyllykyl methylcellulose kufanele anake izinto ezilandelayo kuhlelo lokusebenza:
Uma kwenzeka i-powder yodaka, i-hydroxypropyllykyllose idlala imiphumela esekelayo kuphela, futhi ayihlanganyeli kunoma yikuphi ukusabela kwamakhemikhali. I-powder yodaka ingezwa ngamanzi bese ifaka odongeni, okungukusabela kwamakhemikhali. Ngenxa yokwakheka kwezinto ezintsha, i-powder yodaka odongeni iyasuswa odongeni nasekutholeni i-powder ukwakha izinto ezintsha. IHydroxypropyllylylylylyllose kuphela igcina amanzi futhi isize i-grey calcium ukuze ibe nempendulo engcono, kepha ayihlanganyeli kunoma iyiphi impendulo.
I-Hydroxypropyllylylylylllllllulose HPMC ayihlanganyeli kunoma yikuphi ukusabela kwamakhemikhali, kepha isiza kuphela. Faka amanzi ku-powder mud bese uyibeka odongeni, kungukusabela kwamakhemikhali. Ngenxa yokwakheka kwezinto ezintsha, i-powder yodaka odongeni iyasuswa odongeni nasekutholeni i-powder, khona-ke akunakwenzeka, ngoba izinto ezintsha ziye zakhiwa ns. Izici eziphambili zeGrey Calcium Powder yilezi: CA (oh) 2, ingxube ye-CAO nenani elincane le-caco3, cao
H2o = ca (oh) 2-ca (oh) 2 CO2 = CACO3 ↓ H2O
I-Grey calcium ikhiqiza ezinye izinto ngaphansi komphumela wamanzi kanye ne-CO2 emoyeni, kanti i-HPMC igcina kuphela amanzi futhi isiza i-calcium empunga ukuba ibe nempendulo engcono. Ayihlanganyeli kunoma iyiphi impendulo.
I-Hydroxypropyllylylylylyllllulose inokusetshenziswa okuhlukahlukene. Empilweni yansuku zonke, imikhiqizo eminingi ayihlukaniswa yinqubo yokukhiqiza. Ngemuva kwalokho, ezimbonini ezahlukene, imuphi umphumela we-hydroxypropylllylylylylylylyly, ngizokuchazela, ukuze uvikele ukusetshenziswa kabi kwaso ngenkathi uthola ulwazi.
Okokuqala, embonini yezokwakha, kungabhekwa njenge-retarder kanye ne-ejenti yokugcina amanzi. Udaka ngodaka luyancipha, ngakho-ke wonke udaka owomile esilusebenzisayo unokubamba iqhaza kwawo. Ngaphezu kwalokho, ezintweni zokwakha ezifana ne-gypsum eluhlaza, udaka, kanye ne-powder yodaka, ingasetshenziswa njenge-binder, kepha futhi yenza upende kalula. In marble, adhesive ceramic tiles, molecular compound plastic decorations, it can be used as an adhesion enhancer, etc. It can be said that hydroxypropyl methyl cellulose is the most famous for its versatility in building materials.
Kwezinye izimboni, njengokukhiqiza i-porcelain kanye nobumba, kungasetjenziswa njengokunamathelisa kokwenziwa kwemikhiqizo ye-porcelain kanye ne-pottery; Embonini ye-lacquer kanye nokuphrinta kwe-inki, ingasetshenziswa njengempuphu evulekile, isikhulile, i-stabilizer, futhi noma ngoba ingahlanganiswa ne-solvent ye-organic noma amanzi angenziwa kahle ekwenzeni amapulasitiki ahlanganisiwe we-molecular , kanye nabathambisi, ama-ejenti wokukhulisa abakhule, ama-lubrantis, njll; Ekwenziweni kwePolyvinyl Chloride, kubhekwa njengempuphu evulekile.
Imikhiqizo eyenziwe nge-hydroxypropylllylylylykyl isetshenziswa kabanzi ekubumbeni okusha kwezithelo nemifino, umuthi, izikhumba zezilwane kanye nezimboni zezindwangu. Kuphephile futhi akunobuthi, akukucasuli kakhulu emzimbeni womuntu mucous membranes nezikhumba, futhi kungasetshenziswa ngisho nasengezo sokudla. Kodwa-ke, esimweni sangempela salolu daba, uthuli lwalo lungadala ukungcoliswa komoya, futhi aluzuzise ukulungiswa kwesikhumba ukubahlukanisa emlilweni ukugwema ukuqhuma.
Ukugcinwa kwamanzi
I-hydroxyproppropyllose ekhethekile yokwakha igwema ukusetshenziswa kwamanzi ngokweqile nge-substrate, futhi amanzi kufanele agcinwe ku-plaster ngangokunokwenzeka ngesikhathi lapho i-gypsum isethwe ngokuphelele. Le mpahla ekhethekile ibizwa ngokuthi ukugcinwa kwamanzi futhi ilingana ngqo nokuvunywa kwe-hydroxypropylylylyllylylylylylylylyllylylyllose hark esetshenziselwa ukwakhiwa ososimende. Ukuphakama kwesixazululo kwesixazululo, kukhuphuka isipiliyoni sokugcina amanzi.
Anti-sagging
Udaka olunezici ezikhethekile zokulwa ne-sagging lungasetshenziswa ngokuhlanganiswa okukhulu ngaphandle kokugcoba, okubuye kusho ukuthi udaka ngokwalo aluguquki ubulili bayo, ngaphandle kwalokho kuzokwehla lapho kwakhiwa lapho kwakhiwa.
Yehlisa ukubonakala futhi yenza kube lula ukwakhiwa
Ngemuva kokungeza imikhiqizo ehlukahlukene ye-hydroxyproppropyll methylcellulose, udaka lwe-green gypsum olunesimo sengqondo esinobumnene lungakhiqizwa. Lapho kuthathwa njengokufanele futhi ibanga eliphansi eliphansi le-hydroxyproppropyls elikhethekile lisetshenziswa, izinga lokubonakala lincishisiwe futhi kwakhiwa kuba lula. Kodwa-ke, ukugcinwa kwamanzi kwe-hydroxypropylllyll methylcellulose yokwakhiwa okuphansi kwensizwa kubuthakathaka kakhulu, futhi kuyadingeka ukwandisa inani lokungezwa.
Izinga lokuhlanganiswa kwepulasitiki
Ngenani elinqunyelwe lodaka olomile, kungokomnotho ngokwengeziwe ukukhiqiza usayizi ophakeme wodaka, ongatholakala ngokungeza amanzi amancane nama-bubble. Kodwa-ke, uma inani lamanzi nama-bubble lide kakhulu, amandla awakhubazekile.
Isikhathi sePosi: Apr-26-2024