I-Hydroxypropyl methylcellulose (HPMC) Ngabe i-polymer compound esetshenziswa kakhulu ezintweni zokwakha, ikakhulukazi e-gypsum ebheke udaka, lapho idlala khona indima ebalulekile. Njengesengezo, i-HPMC ingathuthukisa ngempumelelo ukusebenza okusebenzayo, ukugcinwa kwamanzi nokunamathela kwe-gypsum ebheke kabanzi, ngakho-ke kusetshenziswa kabanzi ekwakheni nasekuhlobiseni.
1. Izici eziyisisekelo ze-HPMC
I-HPMC iyi-ether engeyona eye-celtule ye-nikelvu Ingancibilikisa ngokushesha emanzini ukuze kwakheke uketshezi lwe-colloidal olufanayo, futhi inama-adhesion amahle, i-lubrity, i-Film-yakha ukugcinwa kwamanzi. Lezi zici zenza i-HPMC isetshenziswe kabanzi ezintweni zokwakha, ikakhulukazi ilungele ukusetshenziswa kwezinto ezisekelwa yi-gypsum.
Izici eziphambili ze-HPMC zifaka phakathi izici ezilandelayo:
Ukugcinwa kwamanzi: I-HPMC ingagcina umswakama ngempumelelo ku-gypsum ebheke ngodaka, ngaleyo ndlela inikeze isikhathi esivulekile nokusebenza kwezinto ezibonakalayo.
Ukuqina
Ukugcotshwa: Izindawo zokugcoba ze-HPMC zithuthukisa ukuhanjiswa kokuzizwa ngodaka nokwenza ukwakhiwa kube lula.
Impahla eyakha ifilimu: Ingakha ifilimu evikelayo ebusweni bodaka, ngcono ukumelana nokuqhekeka kodaka.
2. Indlela yokusebenza kwe-HPMC ku-Gypsum ebheke udaka
Ngemuva kokungeza i-HPMC ku-gypsum ebheke udaka, izakhiwo ezibonakalayo zithuthukiswa ikakhulu kulezi zinto ezilandelayo:
Ukwenza ngcono ukugcinwa kwamanzi: Ngesikhathi senqubo yokwakha ye-gypsum ebheke ngodaka, uma ukulahleka kwamanzi kushesha kakhulu, kuzoholela ekuqiniseni okungalingani, ukuqhekeka kanye namandla ancishisiwe. I-HPMC ingakha ifilimu enhle ye-hydration ku-plaster, yehlisa izinga lamanzi okuhwamuka, ukuze udaka lukwazi ukugcina amanzi anele ngesikhathi senqubo yokomisa, siqinisekise ukuqina kwalo, ngaleyo ndlela kugweme ukukhiqizwa kwemifantu.
Ukwenza ngcono i-Adhesion: I-HPMC ingakha ifilimu elincanyana ebusweni bodaka, okungakhulisa ukunamathela lapho kuhlangana nobuso be-substrate, ukuze ukunamathela kodonga kuyanda. Ikakhulu ku-substrates e-POROUS ne-DRMC, umphumela wokugcina amanzi we-HPMC angavimba ne-substrate kusuka kumanzi ngokushesha, ngaleyo ndlela enze ngcono umphumela wokubopha.
Ukuthuthukisa ukumelana kokuqhekeka: U-Gypsum abhekene nodaka obhekene nalo ungenwa ukuqhekeka okuminyanisa ngenxa yezinguquko zokushisa kanye nomswakama.I-HPMC Inciphisa phansi izinga lokumisa ama-shrinkage ngokulungisa izinga lokuhwamuka kwamanzi, ngaleyo ndlela linciphise ngempumelelo ingozi yokuqhekeka kungqimba lwesendlalelo. Ngasikhathi sinye, ifilimu le-colloid elenziwe yi-HPMC linganikeza nokuvikelwa okuthile okulwa nokuqhekeka kodaka.
Thuthukisa ukukhiqizwa: I-HPMC ingakhuphula i-viscosity neplastiki yodaka, okwenza kube lula ukusebenza lapho kuxubha nokulinganisa. I-HPMC ithuthukisa ukusebenza kodaka, futhi abasebenzi bokwakha bangalawula kahle ubukhulu nobukhulu, okusiza ukuthola umphumela wokuqeda okubushelelezi.
3. I-HPMC ithuthukisa ukusebenza kwe-gypsum ebheke udaka
Ukungezwa kwe-HPMC kunokuthuthuka okuningi ngokusebenza kwe-gypsum ebheke ngodaka, kufaka phakathi:
Ukuthuthukiswa kwe-Rheological: I-HPMC ingakhulisa kakhulu ukubonwa kodaka, lawula uketshezi lodaka, luvimbela izinkinga zokugcoba, futhi luthuthukise ukusebenza kwe-plaster.
Ukuphikiswa kweqhwa okuthuthukile: Ifilimu ye-colloid eyakhiwe yi-HPMC inomphumela wokuvikela ku-plaster ngesilinganiso esithile, ivimbela udaka oluvela ezindaweni zokushisa eziphansi, kanye nokwenza ngcono ukumelana nezithelo eziphansi.
Ngcono ukumelana kwe-shrinkage:I-HPMC Kwandisa okuqukethwe komswakama ku-plaster, kunciphisa inkinga ye-shrinkage okubangelwa ukuhwamuka kwamanzi, futhi yenza ungqimba olungahle luzinzile futhi luthambekele kancane ekuqhekekeni.
I-Adhesion ethuthukisiwe: Izingxenye zeBonding ze-HPMC zingathuthukisa ukunamathela kodaka ebusweni be-substrate, okwenza ukuhlanganiswa okuncane kakhulu kuwa.
4. Ukuqapha ekusetshenzisweni kwe-HPMC
Yize i-HPMC inezinzuzo eziningi ze-gypsum zibheke ngodaka, lezi zici ezilandelayo kufanele futhi ziphawulwe ekusetshenzisweni kwazo:
Ukulawulwa kwenani lokungezelela: Isengezo esiningi se-HPMC sizodala ukuthi udaka lube lunamathele kakhulu, okwenza kube nzima ukushelela, okuthinta umphumela wokwakha. Ngokuvamile, inani lokungezwa le-HPMC kufanele lilawulwe phakathi kwebanga le-0.1% -0.5%, futhi lilungiswe ngokuya ngezidingo zangempela.
Ngisho nokuxuba:I-HPMC idinga ukushukunyiswa ngokuphelele lapho kuxutshwe nezinto zokwakha njenge-gypsum ukuqinisekisa ukuhlakazeka okufanayo kanye nokusebenza okufanayo. I-HPMC ingachithwa emanzini kuqala, bese ingezwe ku-gypsum yokuxuba, noma ingaxutshwa ngokulinganayo esiteji se-powder esomile.
Ukuvumelana nezinye izengezo: e-gypsum ebheke ngodaka, i-HPMC ivame ukusetshenziswa nezinye izengezo, ezifana namanzi, ama-retainers amanzi, njll. Lapho engeza izithasiselo eziningi, unake ukuhambisana kwemisebenzi eminingi ukuze uvikele ukusebenzisana okuthinta ukusebenza.
5. Ukubaluleka kwe-HPMC embonini
Ku-gypsum ebheke ngodaka nezinye izinto zokwakha, i-hpmc, njengento esemqoka, idlala indima ebalulekile ekwenzeni ngcono ukusebenza kwezinto ezibonakalayo ngenxa yokugcinwa kwayo okuhle, ukunamathela, ukuqina nokuqhekeka. Eminyakeni yamuva nje, ngesidingo esandayo sezinto zokwakha eziluhlaza, izici zokuvikela ezemvelo ze-HPMC nazo zenze zajabulisa imakethe. Ezakhiweni zanamuhla, i-HPMC ayigcini nje ngokuthuthukisa umphumela wokusetshenziswa kwe-gypsum abheke udaka, kepha futhi ithuthukisa ikhwalithi yokwakha nokusebenza kahle kwezokwakha.
Ukusetshenziswa kwe-HPMC ku-Gypsum abhekene namanzi kuphela akhulisa ukugcinwa kwamanzi kuphela, ukunamathela kanye nokuvimbela ukusetshenziswa kwezinto, kepha futhi kuthuthukisa ukusebenza kokwakha, okwenza kube yisengezo esisemqoka ekwakheni. Izici eziyingqayizivele ze-HPMC kanye nokuthuthuka kokusebenza okunezinhlobonhlobo zezinto eziningi zenze kwaba kubaluleke kakhulu ezintweni zokwakha, ukuhlinzeka ukusekelwa okuqinile kwezobuchwepheshe kwekhwalithi ephezulu, ehlala phezulu ephakemeyo kuyaphela. Ngokuzayo, ukuthuthukiswa okuqhubekayo kobuchwepheshe bokwakha, amathemba wesicelo se-HPMC ngezinto ezisetshenziswayo ze-gypsum zizobanzi.
Isikhathi Sokuthumela: Nov-19-2024