Mapangidwe a HPMC mu matope osakanikirana

1. Makhalidwe a HPMC mu matope wamba

HPMC imagwiritsidwa ntchito ngati yobwezeretsanso yobwezeretsa madzi mu simenti kufalikira. Mu zigawo za konkriti ndi matope, zimatha kusintha mafayilo komanso kuchuluka kwa shrinkage, pulakuti sime imodzi yolimbana ndi nthawi, ndikusintha mphamvu yoyambirira komanso yokhazikika. Chifukwa ili ndi ntchito yosungira madzi, imatha kuchepetsa kutayika kwa madzi pazenera, pewani ming'alu m'mphepete, ndikusintha zomatira komanso zomangamanga. Makamaka pomanga, nthawi yolowa imatha kukulitsidwa ndikusinthidwa. Ndi kuwonjezeka kwa HPMC yokhala ndi HPMC, nthawi yokhazikitsa matope idzakula modabwitsa; Sinthani makonzedwe ndi kuponderezedwa, woyenera kumanga makina; Sinthani mphamvu zomangamanga ndikupindulitsa nyumbayo imateteza ku nyengo zosungunulira madzi.

2. Makhalidwe a HPMC mu matope apadera

HPMC ndi yothandiza kwambiri yamadzi yopukutira matope a ufa, zomwe zimachepetsa magazi omwe amatulutsa magazi ndikuchepetsa matope ndikuwongolera chitoliro cha matope. Ngakhale hpmc pang'ono amachepetsa mphamvu yothera matope, imatha kukulitsa mphamvu yakuwoneka komanso mphamvu yamatope. Kuphatikiza apo, HPMC imatha kulepheretsa mapangidwe a matopu apulasitiki ndikuchepetsa mutu wa pulasitiki wosweka matope. Kusungidwa kwamadzi kwa matope kumawonjezeka ndi kuchuluka kwa ma viscct ya HPMC, ndipo ma viscwo atapitilira 100000mkwa, madzi osasungidwa samachulukitsa kwambiri. Chisangalalo cha HPMC chimakhalanso ndi chidwi china pamadzi osunga madzi a matope. Tikachuluka tinthu tatha, kusunga madzi kwa matope kumakwaniritsidwa. Kukula kwa HPMC nthawi zambiri kumagwiritsidwa ntchito kwa simenti kuyenera kukhala kochepera microns microns (80 mesh). Mlingo woyenera wa HPMC mu matope a ufa ndi 1 ~ 3 ~.

2.1. HPMC ikatha matope imasungunuka m'madzi, zowonjezera komanso zogawika vafano ndi zofananira za momwe zimapangidwira dongosolo. Monga colloid colloid, hpmc "zokutira" tinthu tokhazikika ndipo zimapanga chosanjikiza chakunja chakunja. Kanema wopaka mafuta amapanga matope okhazikika, komanso amasinthanso madzimadzi amasupe ndi njira yosakanikirana.

2.2. Chifukwa cha kapangidwe kake kake, HPMC yankho lake limapangitsa madzi mu matontho kuti siosavuta kutaya, ndikuzichotsa pang'onopang'ono kwa nthawi yayitali, kusiya matope ndi chitoliro chamadzi ndi chogwirira. Zimatha kuletsa madzi mwachangu kwambiri kuchokera ku matope mpaka pansi, kotero kuti madzi osungika amakhala pamalo oyambawo, omwe angalimbikitse hydration ya simenti ndikusintha mphamvu yomaliza. Makamaka ngati mawonekedwewo polumikizana ndi matope a simenti, pulasitala, komanso zomata kutaya madzi, gawo lino lilibe mphamvu ndipo pafupifupi alibe mphamvu. Nthawi zambiri, nkhope zokhudzana ndi zinthuzi ndizotsatsa zonse, zimatenga madzi kuchokera pansi, zomwe zimapangitsa kusakwanira kwa gawo ili, kupanga matayala kapena pulasitala ndi makoma ogwiritsira ntchito pakati pamadzi amachepetsa.

Pokonzekera matope, kusunga madzi ku HPMC ndi ntchito yayikulu. Zatsimikiziridwa kuti kusungidwa kwamadzi kungakhale kokwera ngati 95%. Kuwonjezeka kwa maselo olemera a HPMC ndi kuchuluka kwa simenti kumathandizira kusungidwa kwamadzi komanso mphamvu ya matope.

Chitsanzo: Popeza ma tile akuyenera kukhala ndi mphamvu yayikulu pakati pa gawo lapansi ndi matailosi, zomatira zimakhudzidwa ndi Adsorption wamasisiti awiri; gawo lapansi (khoma) malo ndi matailosi. Makamaka kwa matailosi, mtunduwo umasiyana kwambiri, ena amakhala ndi ma pore ambiri, ndipo matailosi amatenga madzi ambiri, omwe amawononga ntchito yolumikizana. Mthandizi wololera madzi ndi wofunikira kwambiri, ndikuwonjezera HPMC ikhoza kukwaniritsa izi.

2.3. HPMC ndi yokhazikika kwa asidi ndi alkali, ndipo njira yake yothetsera magazi imakhala yokhazikika mu pH = 2 ~ 12. Diasc Soda ndi madzi a laimu samagwira ntchito pang'ono pa ntchito yake, koma alkali amatha kufulumizitsa kufalikira kwake ndikuwonjezera pang'ono ma visni.

2.4. Kugwirira ntchito kwa matope kuwonjezeredwa ndi HPMC kwasintha kwambiri. Matope akuwoneka kuti ndi "mafuta", omwe amatha kupanga khoma lodzaza, kusalala, pangani matabwa kapena njerwa ndi malo opangira opareshoni, yoyenera kupangira dera lalikulu.

2.5. HPMC ndi yopanda polymeric electrolyte, yomwe imakhala yokhazikika mu mchere wamafuta ndi ma elekiti opangira chitsulo, ndipo imatha kuwonjezeredwa kuzomanga kwa nthawi yayitali kuti izi zitsimikizire.