1. Mwachidule
Hydroxypropyl Methylcellulose (HPMC) ndi mamolekyu apamwamba kwambiri omwe amagwira ntchito bwino kwambiri, omwe amagwiritsidwa ntchito kwambiri pomanga, makamaka popanga matope opangidwa ndi simenti. Ntchito zazikulu za HPMC mumatope a simenti ndi monga kukhuthala, kusunga madzi, kupititsa patsogolo katundu wogwirizana komanso kupititsa patsogolo ntchito. Kumvetsetsa machitidwe obalalika a HPMC mumatope a simenti ndikofunikira kwambiri pakuwongolera magwiridwe antchito ake.
2. Basic katundu wa HPMC
HPMC ndi non-ionic cellulose ether, yomwe mayunitsi ake amapangidwa ndi cellulose, hydroxypropyl ndi methyl. Kapangidwe ka mankhwala a HPMC amapatsa wapadera thupi ndi mankhwala katundu mu amadzimadzi njira:
Thickening zotsatira: HPMC akhoza kupanga njira viscous m'madzi, amene makamaka chifukwa chakuti pambuyo kusungunuka m'madzi, mamolekyu ndi mkodzo wina ndi mzake kupanga dongosolo maukonde.
Kusunga madzi: HPMC ili ndi mphamvu yosunga madzi mwamphamvu ndipo imatha kuchedwetsa kutuluka kwa madzi, potero imathandizira kusunga madzi mumatope a simenti.
Kuchita zomatira: Chifukwa mamolekyu a HPMC amapanga filimu yoteteza pakati pa tinthu tating'ono ta simenti, kulumikizana pakati pa tinthu tating'onoting'ono kumatheka.
3. Njira yobalalika ya HPMC mumatope a simenti
Njira yosungunula: HPMC iyenera kusungunuka m'madzi kaye. Njira yowonongeka ndi yakuti ufa wa HPMC umatenga madzi ndi kutupa, ndipo pang'onopang'ono umabalalika kuti apange njira yofanana. Popeza kusungunuka kwa HPMC m'madzi kumagwirizana ndi kuchuluka kwake m'malo (DS) ndi kulemera kwa maselo, ndikofunikira kusankha tsatanetsatane wa HPMC. Kutha kwa HPMC m'madzi ndi njira yogawa, yomwe imafuna kusonkhezera koyenera kuti ifulumizitse kubalalitsidwa.
Kubalalika kufanana: Pakutha kwa HPMC, ngati kugwedezeka sikukwanira kapena kusungunuka kuli kosayenera, HPMC imakonda kupanga ma agglomerates (maso a nsomba). Ma agglomerates awa ndi ovuta kusungunuka, motero amakhudza magwiridwe antchito a matope a simenti. Choncho, yunifolomu yogwira mtima panthawi ya kusungunuka ndi njira yofunikira kuti iwonetsetse kubalalitsidwa yunifolomu kwa HPMC.
Kuyanjana ndi tinthu tating'ono ta simenti: Unyolo wa polima wopangidwa pambuyo pa kusungunuka kwa HPMC udzasungunuka pang'onopang'ono pamwamba pa tinthu tating'ono ta simenti ndi mlatho pakati pa tinthu tating'ono ta simenti kuti tipange filimu yoteteza. Filimu yotetezayi imatha kuonjezera kumamatira pakati pa tinthu tating'ono mbali imodzi, ndipo kumbali inayo, imatha kupanga chotchinga pamwamba pa tinthu tating'onoting'ono kuti tichepetse kusamuka ndi kutuluka kwa madzi.
Kubalalitsidwa bata: The polima unyolo wa HPMC akhoza mwakuthupi adsorb ndi Ca2+, SiO2 ndi ayoni ena padziko particles simenti kuti bata lake kubalalikana. Ndi kusintha mlingo wa m'malo ndi maselo kulemera kwa HPMC, kubalalikana kwake bata mu matope simenti akhoza wokometsedwa.
4. Kukhathamiritsa kwa HPMC mumatope a simenti
Kuchulukitsa:
The thickening zotsatira za HPMC mu matope zimadalira ndende yake ndi maselo kulemera. HPMC ndi apamwamba maselo kulemera akhoza kwambiri kuonjezera mamasukidwe akayendedwe a matope, pamene HPMC ndi otsika maselo kulemera angabweretse bwino thickening tingati pa otsika woipa.
Kukhuthala kungapangitse kuti matope azigwira ntchito bwino komanso kuti matope azikhala ndi ntchito yabwino, makamaka pomanga moyima.
Kusunga madzi:
HPMC imatha kujambula chinyezi ndikuwonjezera nthawi yotseguka yamatope. Kusungirako madzi sikungangochepetse kuchepa ndi mavuto osweka mumatope, komanso kumapangitsa kuti matope agwirizane ndi gawo lapansi.
Mphamvu yosungira madzi ya HPMC imagwirizana kwambiri ndi kusungunuka kwake. Posankha HPMC ndi digiri yoyenera yolowa m'malo, mphamvu yosungira madzi mumatope imatha kukonzedwa.
Makhalidwe abwino omangirira:
Popeza HPMC imatha kupanga mlatho womata pakati pa tinthu tating'ono ta simenti, imatha kupititsa patsogolo mphamvu yomangira yamatope, makamaka ikagwiritsidwa ntchito mumatope otsekemera ndi zomatira matailosi.
HPMC imathanso kupititsa patsogolo ntchito yomanga pochepetsa kutuluka kwamadzi mwachangu komanso kupereka nthawi yayitali yogwira ntchito.
Ntchito yomanga:
Kugwiritsa ntchito HPMC mumatope kumatha kupititsa patsogolo ntchito yake yomanga. HPMC imapangitsa kuti matope azikhala ndi mafuta ochulukirapo komanso kukhuthala bwino, omwe ndi osavuta kugwiritsa ntchito ndikumanga, makamaka mwatsatanetsatane magwiridwe antchito kuti atsimikizire zomanga bwino.
Mwa kusintha kuchuluka ndi kasinthidwe ka HPMC, mawonekedwe a rheological a matope amatha kukonzedwa kuti agwirizane ndi zosowa zosiyanasiyana zomanga.
5. Zitsanzo zogwiritsira ntchito HPMC mumatope a simenti
Zomata matailosi:
HPMC makamaka imagwira ntchito yosunga madzi ndikukhuthala mu zomatira matailosi. Mwa kukonza kusungirako madzi kwa zomatira, HPMC imatha kukulitsa nthawi yake yotseguka, kupereka nthawi yokwanira yosinthira, ndikuletsa matailosi kuti asatengeke akamanga.
Kukhuthala kumawonetsetsa kuti zomatira sizimagwedezeka pakumanga kwa facade, kumapangitsa kuti zomangamanga zikhale zosavuta komanso zothandiza.
Chotsekera pakhoma chakunja:
Mumatope akunja otchinjiriza khoma, ntchito yayikulu ya HPMC ndikuwongolera kusungidwa kwamadzi komanso kukana kwamatope. Pogwira chinyezi, HPMC imatha kuchepetsa kuchepa ndi kuphulika kwa matope panthawi yowumitsa.
Popeza matope otsekemera amakhala ndi zofunika kwambiri pakumanga, kukhuthala kwa HPMC kumatha kuwonetsetsa kugawidwa kwamatope pakhoma, potero kumapangitsa magwiridwe antchito onse a gawo lotsekera.
Mtondo wodziyimira pawokha:
HPMC mu matope okha-leveling akhoza kuonetsetsa kuti palibe stratification kapena madzi seepage pa ndondomeko kusanja ndi kuonjezera mamasukidwe akayendedwe a matope, potero kuonetsetsa flatness ndi mphamvu ya kudziletsa leveling.
6. Chitukuko chamtsogolo cha HPMC
Chitetezo cha Green ndi chilengedwe:
Ndi kusintha kwa zofunikira pachitetezo cha chilengedwe, kupanga zinthu za HPMC zopanda poizoni komanso zowola kudzakhala kofunikira m'tsogolomu.
HPMC yobiriwira komanso yosamalira zachilengedwe sikungochepetsa kukhudzidwa kwa chilengedwe, komanso imapereka malo ogwirira ntchito otetezeka panthawi yomanga.
Kuchita kwakukulu:
Mwa kukhathamiritsa kapangidwe ka mamolekyu a HPMC, zinthu zogwira ntchito kwambiri za HPMC zimapangidwa kuti zikwaniritse ntchito zamatope a simenti okhala ndi ntchito zapamwamba kwambiri.
Mwachitsanzo, posintha kuchuluka kwa m'malo ndi kulemera kwa maselo a HPMC, zinthu zokhala ndi mamasukidwe apamwamba komanso kusunga madzi mwamphamvu zitha kupangidwa.
Kugwiritsa ntchito mwanzeru:
Ndi chitukuko cha sayansi ya zinthu, HPMC yomvera yanzeru imagwiritsidwa ntchito pamatope a simenti, ndikupangitsa kuti isinthe momwe imagwirira ntchito malinga ndi kusintha kwa chilengedwe, monga kusintha kusungirako madzi pansi pa chinyezi chosiyana.
Ma cellulose apamwamba kwambiri a HPMC amatha kubalalitsa bwino ndikupereka kukhuthala, kusunga madzi komanso kukonza bwino ntchito yomanga mumatope a simenti kudzera mu kapangidwe kake kapadera kamankhwala ndi mawonekedwe ake. Posankha mwanzeru komanso kukhathamiritsa kugwiritsa ntchito HPMC, magwiridwe antchito onse a matope a simenti amatha kuwongolera bwino kuti akwaniritse zosowa zamitundu yosiyanasiyana yogwiritsira ntchito. M'tsogolomu, chitukuko chobiriwira, chochita bwino komanso chanzeru cha HPMC chidzalimbikitsanso kugwiritsa ntchito ndi chitukuko cha zipangizo zomangira.
Nthawi yotumiza: Jun-21-2024