Hydroxypropyl Methylcellulose (HPMC) ndi polima wosungunuka m'madzi omwe amagwiritsidwa ntchito kwambiri pomanga, makamaka zomatira za matailosi a simenti. Mapangidwe apadera amankhwala ndi mawonekedwe a HPMC amapangitsa kuti izikhala ndi gawo lofunikira pakuwongolera zomatira, zomangira, komanso kulimba kwa zomatira matailosi.
(1) Chidziwitso choyambirira cha HPMC
1. Kapangidwe ka mankhwala a HPMC
HPMC ndi chotumphukira cha cellulose chomwe chimapezedwa posintha ma cellulose achilengedwe. Mapangidwe ake amapangidwa makamaka ndi magulu a methoxy (-OCH₃) ndi hydroxypropoxy (-CH₂CHOHCH₃) m'malo mwa magulu ena a hydroxyl pa unyolo wa cellulose. Kapangidwe kameneka kamapatsa HPMC kusungunuka kwabwino komanso mphamvu yamadzimadzi.
2. Thupi katundu HPMC
Kusungunuka: HPMC imatha kusungunuka m'madzi ozizira kuti ipange njira yowonekera bwino ya colloidal ndipo imakhala ndi mphamvu yabwino ya hydration ndi thickening.
Thermogelation: Yankho la HPMC lipanga gel osakaniza likatenthedwa ndikubwerera kumalo amadzimadzi pambuyo pozizira.
Zochita zapamtunda: HPMC ili ndi ntchito yabwino yapamtunda poyankha, yomwe imathandizira kupanga mawonekedwe okhazikika.
Zapadera zakuthupi ndi zamankhwala izi zimapangitsa HPMC kukhala chinthu chabwino kwambiri chosinthira zomatira zopangira simenti.
(2) Njira ya HPMC yopititsa patsogolo magwiridwe antchito a zomatira za simenti
1. Konzani kasungidwe ka madzi
Mfundo: HPMC imapanga mawonekedwe a viscous network mu yankho, yomwe imatha kutseka chinyezi. Mphamvu yosungira madzi imeneyi ndi chifukwa cha magulu ambiri a hydrophilic (monga magulu a hydroxyl) mu mamolekyu a HPMC, omwe amatha kuyamwa ndi kusunga chinyezi chochuluka.
Limbikitsani kumamatira: Zomatira za simenti zopangidwa ndi simenti zimafunikira chinyezi kuti zitenge nawo gawo pakuchita kwa hydration panthawi yowumitsa. HPMC amasunga kukhalapo kwa chinyezi, kulola simenti kuti hydrate mokwanira, potero kuwongolera zomatira zomatira.
Wonjezerani nthawi yotseguka: Kusungirako madzi kumalepheretsa zomatira kuti zisamawume mwachangu pakumanga, kukulitsa nthawi yosintha pakuyika matailosi.
2. Kupititsa patsogolo ntchito yomanga
Mfundo: HPMC ili ndi zotsatira zabwino zokulirakulira, ndipo mamolekyu ake amatha kupanga maukonde ngati mawonekedwe amadzimadzi, potero amawonjezera kukhuthala kwa yankho.
Limbikitsani katundu wotsutsa-sagging: slurry yokhuthala imakhala ndi katundu wabwino kwambiri wotsutsa-sagging panthawi yomanga, kuti matailosi akhale okhazikika pamalo omwe adakonzedweratu panthawi yokonza ndipo sangatsike chifukwa cha mphamvu yokoka.
Limbikitsani fluidity: Kukhuthala koyenera kumapangitsa kuti zomatira zikhale zosavuta kugwiritsa ntchito ndi kufalikira panthawi yomanga, ndipo panthawi imodzimodziyo zimakhala ndi ntchito yabwino, kuchepetsa zovuta zomanga.
3. Limbikitsani kulimba
Mfundo Yofunika: HPMC imathandizira kusunga madzi komanso kumamatira kwa zomatira, potero kumapangitsa kulimba kwa zomatira za simenti.
Limbikitsani mphamvu zomangirira: Gawo la simenti lomwe lili ndi madzi okwanira limapereka kumamatira kwamphamvu ndipo silimakonda kugwa kapena kusweka pakagwiritsidwa ntchito nthawi yayitali.
Limbikitsani kukana ming'alu: Kusungidwa bwino kwa madzi kumapewa kutsika kwakukulu kwa zomatira panthawi yowumitsa, potero kuchepetsa vuto long'ambika lobwera chifukwa cha kuchepa.
(3) Thandizo la deta yoyesera
1. Kuyesa kusunga madzi
Kafukufuku wasonyeza kuti kusungirako madzi kwa zomatira za matailosi opangidwa ndi simenti ndi kuwonjezera kwa HPMC kumakhala bwino kwambiri. Mwachitsanzo, kuwonjezera 0.2% HPMC ku zomatira kumatha kuonjezera kuchuluka kwa madzi osungira madzi kuchokera 70% mpaka 95%. Kuwongolera uku ndikofunikira kuti zomatira zikhale zolimba komanso zolimba.
2. Mayeso a viscosity
Kuchuluka kwa HPMC anawonjezera kumakhudza kwambiri mamasukidwe akayendedwe. Kuwonjezera 0.3% HPMC pa zomatira matailosi opangidwa ndi simenti kumatha kukulitsa kukhuthala kangapo, kuwonetsetsa kuti zomatirazo zimakhala ndi ntchito yabwino yolimbana ndi kugwa komanso ntchito yomanga.
3. Kuyesa kwamphamvu kwa bond
Kupyolera mu kuyesa kofananira, zidapezeka kuti mphamvu yolumikizana pakati pa matailosi ndi magawo a zomatira okhala ndi HPMC ndizabwinoko kuposa zomatira zopanda HPMC. Mwachitsanzo, mutatha kuwonjezera 0.5% HPMC, mphamvu yomangirira imatha kuwonjezeka ndi 30%.
(4) Zitsanzo zogwiritsira ntchito
1. Kuyika matailosi apansi ndi makoma a khoma
Poyala kwenikweni matailosi apansi ndi makhoma, zomatira za simenti zopangidwa ndi HPMC zidawonetsa ntchito yabwino yomanga komanso kulumikizana kosatha. Panthawi yomanga, zomatirazo sizili zophweka kutaya madzi mwamsanga, kuonetsetsa kuti zomangamanga bwino komanso kukhazikika kwa matayala.
2. Njira yotchinjiriza kunja kwa khoma
Zomatira zowonjezeredwa ndi HPMC zimagwiritsidwanso ntchito kwambiri pamakina otchinjiriza akunja. Kusungidwa kwake bwino kwa madzi ndi kumamatira kumatsimikizira mgwirizano wamphamvu pakati pa bolodi lotsekera ndi khoma, potero kumapangitsa kukhazikika ndi kukhazikika kwa dongosolo lakunja lotchingira khoma.
Kugwiritsa ntchito HPMC pa zomatira za matailosi opangidwa ndi simenti kumathandizira kwambiri ntchito zomatira. Pokonza kusungirako madzi, kupititsa patsogolo ntchito yomanga ndikuwongolera kulimba, HPMC imapangitsa zomatira za simenti zokhala ndi simenti kukhala zoyenera pazomangamanga zamakono. Ndi chitukuko chaukadaulo komanso kufunikira kwa zida zomangira zogwira ntchito kwambiri, chiyembekezo chogwiritsa ntchito HPMC chidzakhala chokulirapo.
Nthawi yotumiza: Jun-26-2024