1. Isishwankathelo
I-Hydroxypropyl Methylcellulose (HPMC) i-high-molecular compound kunye nokusebenza okugqwesileyo, esetyenziswa ngokubanzi kwizinto zokwakha, ngokukodwa kwimveliso yodaka olusekelwe kwi-samente. Imisebenzi ephambili ye-HPMC kudaka lwesamente ibandakanya ukuqina, ukugcinwa kwamanzi, ukuphucula iipropati zebhondi kunye nokuphucula ukusebenza. Ukuqonda ukuziphatha kokusasazwa kwe-HPMC kudaka lwesamente kubaluleke kakhulu ekwandiseni ukusebenza kwayo.
2. Iimpawu ezisisiseko ze-HPMC
I-HPMC yi-ether ye-cellulose engekho i-ionic, iiyunithi zayo zesakhiwo zenziwe nge-cellulose, i-hydroxypropyl kunye ne-methyl. Ubume bemichiza ye-HPMC inika iipropati ezizodwa zomzimba kunye neekhemikhali kwisisombululo esimanzi:
Ukuqina kwesiphumo: I-HPMC inokwenza isisombululo se-viscous emanzini, esibangelwa ikakhulu kukuba emva kokuchithwa emanzini, iimolekyuli zixakeke omnye komnye ukuze zenze isakhiwo sothungelwano.
Ugcino lwamanzi: I-HPMC inomthamo owomeleleyo wokugcina amanzi kwaye inokulibazisa ukuphuphuma kwamanzi, ngokwenjenjalo idlala indima ekugcineni amanzi kudaka lwesamente.
Ukusebenza kwe-adhesion: Ngenxa yokuba ii-molecule ze-HPMC zenza ifilimu ekhuselayo phakathi kweengqungquthela ze-samente, ukusebenza kwe-bonding phakathi kweengqungquthela kuphuculwe.
3. Inkqubo yokusasazwa kweHPMC kudaka lwesamente
Inkqubo yokuchithwa: I-HPMC kufuneka inyibilikiswe emanzini kuqala. Inkqubo yokutshatyalaliswa kukuba i-HPMC powder ithatha amanzi kwaye idumbe, kwaye ngokuthe ngcembe ihlakazeke ukuze yenze isisombululo esifanayo. Kuba ukunyibilika kwe-HPMC emanzini kunxulumene nenqanaba layo lokuthatha indawo (DS) kunye nobunzima bemolekyuli, kubalulekile ukukhetha ingcaciso echanekileyo ye-HPMC. Ukuchithwa kwe-HPMC emanzini yinkqubo yokusasazwa, efuna ukuvuselela okufanelekileyo ukukhawulezisa ukusasazwa.
Ukusabalalisa ukufana: Ngexesha lokuchithwa kwe-HPMC, ukuba ukuvuselela akwanelanga okanye iimeko zokuchithwa azifanelekanga, i-HPMC ilungele ukwenza i-agglomerates (amehlo eentlanzi). Ezi agglomerates kunzima ukunyibilika ngakumbi, ngaloo ndlela kuchaphazela ukusebenza kodaka lwesamente. Ke ngoko, ukuvuselela okufanayo ngexesha lenkqubo yokupheliswa likhonkco elibalulekileyo lokuqinisekisa ukusasazwa okufanayo kweHPMC.
Ukusebenzisana kunye neengqungquthela ze-samente: Iintambo ze-polymer ezenziwe emva kokuba i-HPMC ichithwe ziya kubhengezwa ngokuthe ngcembe phezu kweengqungquthela zesamente kunye nebhuloho phakathi kweengqungquthela zesamente ukwenza ifilimu ekhuselayo. Le filimu ekhuselayo inokunyusa ukudibanisa phakathi kweengqungquthela ngakwesinye icala, kwaye ngakolunye uhlangothi, inokwenza umqobo phezu kwamaqhekeza ukulibazisa ukufuduka kunye nokuphuma kwamanzi.
Uzinzo lwe-Dispersion: Ikhonkco le-polymer ye-HPMC inokukhangisa ngokomzimba kunye ne-Ca2 +, i-SiO2 kunye nezinye ii-ion kumphezulu wamasuntswana e-samente ukuzinzisa isimo sayo sokusasazeka. Ngokulungelelanisa iqondo lokutshintshwa kunye nobunzima bemolekyuli ye-HPMC, ukuzinza kwayo kwe-dispersion kudaka lwesamente kunokuphuculwa.
4. Ukulungelelaniswa okusebenzayo kwe-HPMC kudaka lwesamente
Isiphumo sokuqina:
Ukuqina kwefuthe le-HPMC kudaka kuxhomekeke kugxininiso kunye nobunzima bemolekyuli. I-HPMC enobunzima obuphezulu bemolekyuli inokunyusa kakhulu i-viscosity yodaka, ngelixa i-HPMC enobunzima obuphantsi be-molecular inokuvelisa umphumo ongcono wokutyeba kwiindawo eziphantsi.
Umphumo wokuqina unokuphucula ukusebenza kodaka kwaye wenze udaka lube nokusebenza ngcono, ngakumbi kulwakhiwo oluthe nkqo.
Ugcino lwamanzi:
I-HPMC inokubamba ngokufanelekileyo ukufuma kwaye yandise ixesha elivulekileyo lodaka. Ukugcinwa kwamanzi akukwazi ukunciphisa kuphela ukucutheka kunye neengxaki zokuqhekeka kwi-mortar, kodwa nokuphucula ukusebenza kwe-bonding yodaka kwi-substrate.
Umthamo wokugcina amanzi we-HPMC unxulumene ngokusondeleyo nokunyibilika kwayo. Ngokukhetha i-HPMC eneqondo elifanelekileyo lokutshintsha, isiphumo sogcino lwamanzi lodaka lunokuphuculwa.
Iipropati eziphuculweyo zokudibanisa:
Ekubeni i-HPMC inokwenza ibhulorho encangathi phakathi kwamasuntswana esamente, inokuphucula ngokufanelekileyo amandla okudibanisa udaka, ngakumbi xa isetyenziswa kudaka lokugquma i-thermal kunye nokuncamatheliswa kweethayile.
I-HPMC inokuphucula ukusebenza kolwakhiwo ngokunciphisa ukuguquka kwamanzi ngokukhawuleza kunye nokubonelela ixesha elide lokusebenza.
Ukusebenza kolwakhiwo:
Ukusetyenziswa kwe-HPMC kudaka kunokuphucula kakhulu ukusebenza kwayo yokwakha. I-HPMC yenza udaka lube ne-lubricity engcono kunye ne-viscosity, ekulula ukuyisebenzisa kunye nokwakha, ngokukodwa kwimisebenzi yeenkcukacha ukuqinisekisa ukwakhiwa okugudileyo.
Ngokulungelelanisa isixa kunye noqwalaselo lwe-HPMC, iipropati ze-rheological zodaka zinokulungiswa ukuze zilungelelanise iimfuno ezahlukeneyo zokwakha.
5. Imizekelo yokusetyenziswa kwe-HPMC kudaka lwesamente
Ukuncamatheliswa kwethayile:
I-HPMC ikakhulu idlala indima yogcino lwamanzi kunye nokutyeba kwizinto zokuncamathelisa iithayile. Ngokuphucula ukugcinwa kwamanzi kwi-adhesive, i-HPMC inokwandisa ixesha layo elivulekileyo, inike ixesha elaneleyo lohlengahlengiso, kwaye ithintele iithayile ukuba zingatyibiliki emva kokwakhiwa.
Umphumo wokuqina uqinisekisa ukuba i-adhesive ayiguquki ngexesha lokwakhiwa kwe-facade, ukuphucula ukukhululeka kunye nomphumo wokwakha.
Udaka lwangaphandle lokugquma eludongeni:
Kudaka lwangaphandle lokugquma eludongeni, umsebenzi ophambili we-HPMC kukuphucula ukugcinwa kwamanzi kunye nokumelana nokuqhekeka kodaka. Ngokubamba umswakama, i-HPMC inokunciphisa ngokufanelekileyo i-shrinkage kunye nokuqhekeka kodaka ngexesha lokumisa.
Ekubeni i-insulation mortar ineemfuno eziphezulu zokwenziwa komsebenzi wokwakha, umphumo wokuqina we-HPMC unokuqinisekisa ukuhanjiswa okufanayo kodaka eludongeni, ngaloo ndlela kuphuculwe ukusebenza ngokubanzi kwe-insulation layer.
Udaka lokuzilinganisa:
I-HPMC kwi-self-leveling mortar inokuqinisekisa ukuba akukho stratification okanye i-seapage yamanzi ngexesha lenkqubo yokulinganisa ngokwandisa i-viscosity yodaka, ngaloo ndlela iqinisekisa ukuba flatness kunye namandla okuzilinganisa.
6. Indlela yophuhliso lwexesha elizayo ye-HPMC
Ukukhusela okuluhlaza kunye nokusingqongileyo:
Ngokuphuculwa kweemfuno zokhuseleko lwendalo esingqongileyo, uphuhliso lweemveliso zeHPMC ezinetyhefu ephantsi kunye ne-biodegradable ziya kuba ngumgaqo obalulekileyo kwixesha elizayo.
I-HPMC eluhlaza kunye nokusingqongileyo ayinako ukunciphisa impembelelo kokusingqongileyo kuphela, kodwa ibonelela ngendawo yokusebenza ekhuselekileyo ngexesha lokwakha.
Ukwenza okuphezulu:
Ngokulungisa i-molecular structure ye-HPMC, iimveliso ze-HPMC eziphezulu ziphuhliswa ukuhlangabezana nezicelo zodaka lwesamente kunye neemfuno eziphezulu zokusebenza.
Ngokomzekelo, ngokulungelelanisa iqondo lokutshintshela kunye nobunzima bemolekyuli ye-HPMC, iimveliso ezine-viscosity ephezulu kunye nokugcinwa kwamanzi okunamandla kunokuphuhliswa.
Isicelo esikrelekrele:
Ngophuhliso lwesayensi yezinto, i-HPMC ephendulayo ehlakaniphile isetyenziselwa udaka lwesamente, ivumela ukuba ilungelelanise ukusebenza kwayo ngokweenguqu zokusingqongileyo, ezifana nokulungelelanisa ngokuzenzekelayo ukugcinwa kwamanzi phantsi kokufuma okwahlukileyo.
Umgangatho ophezulu we-cellulose HPMC unokusasaza ngokufanelekileyo kwaye unikeze ukutyeba, ukugcinwa kwamanzi kunye nokusebenza okuphuculweyo kolwakhiwo kudaka lwesamente ngokusebenzisa ubume bayo beekhemikhali ezizodwa kunye neempawu ezibonakalayo. Ngokukhetha ngokufanelekileyo kunye nokuphucula ukusetyenziswa kwe-HPMC, ukusebenza ngokubanzi kodaka lwesamente kunokuphuculwa kakhulu ukuhlangabezana neemfuno zeemeko ezahlukeneyo zesicelo. Kwixesha elizayo, uhlaza, ukusebenza okuphezulu kunye nophuhliso olukrelekrele lwe-HPMC luya kukhuthaza ngakumbi ukusetyenziswa kunye nophuhliso kwizinto zokwakha.
Ixesha lokuposa: Jun-21-2024