Kodi Makhalidwe a HPMC mumatope osakanikirana ndi owuma

1. Makhalidwe a HPMC mumatope wamba

HPMC imagwiritsidwa ntchito kwambiri ngati retarder ndi posungira madzi potengera simenti. M'zigawo za konkire ndi matope, zimatha kupititsa patsogolo kukhuthala ndi kuchepa kwamphamvu, kulimbitsa mphamvu yolumikizana, kuwongolera nthawi yoyika simenti, ndikuwongolera mphamvu zoyambira ndi mphamvu yopindika. Chifukwa ili ndi ntchito yosunga madzi, imatha kuchepetsa kutaya kwa madzi pamtunda wa konkire, kupeŵa ming'alu m'mphepete, ndikuwongolera kumamatira ndi ntchito yomanga. Makamaka pomanga, nthawi yoikika ikhoza kuwonjezeredwa ndi kusinthidwa. Ndi kuchuluka kwa zomwe zili mu HPMC, nthawi yoyika matope idzakulitsidwa motsatizana; kusintha machinability ndi pumpability, oyenera kumanga umakaniko; Kupititsa patsogolo ntchito yomanga komanso kupindulitsa pomanga Kuteteza ku nyengo ya mchere wosasungunuka m'madzi.

2. Makhalidwe a HPMC mumatope apadera

HPMC ndi madzi osungira madzi osungiramo madzi owuma ufa wouma, omwe amachepetsa kuthamanga kwa magazi ndi delamination ya matope ndikuwongolera mgwirizano wa matope. Ngakhale HPMC imachepetsa pang'ono mphamvu yosinthika komanso yopondereza ya matope, imatha kukulitsa kwambiri mphamvu yamakomedwe ndi mphamvu yomangira matope. Komanso, HPMC akhoza bwino ziletsa mapangidwe ming'alu pulasitiki mu matope ndi kuchepetsa pulasitiki akulimbana index wa matope. Kusungidwa kwa madzi kwa matope kumawonjezeka ndi kuwonjezeka kwa HPMC mamasukidwe akayendedwe, ndipo pamene mamasukidwe akayendedwe amaposa 100000mPa · s, kusunga madzi sikuwonjezeka kwambiri. Ubwino wa HPMC ulinso ndi chikoka pa kuchuluka kwa madzi posungira matope. Pamene tinthu tating'onoting'ono tating'onoting'ono, kuchuluka kwa madzi osungiramo matope kumakhala bwino. Kukula kwa tinthu ting'onoting'ono kwa HPMC komwe kumagwiritsidwa ntchito ngati matope a simenti kuyenera kukhala kosakwana 180 microns (80 mesh screen). Mlingo woyenera wa HPMC mumatope owuma ufa ndi 1 ‰～3 ‰.

2.1. Pambuyo pa HPMC mumatope itasungunuka m'madzi, kugawa kogwira mtima ndi kofanana kwa zinthu za simenti mu dongosolo kumatsimikiziridwa chifukwa cha ntchito yapamtunda. Monga colloid yoteteza, HPMC "imakulunga" tinthu tating'onoting'ono tating'onoting'ono ndikupanga wosanjikiza pamwamba pake. Wosanjikiza filimu mafuta kumapangitsa kuti matope dongosolo khola, komanso bwino fluidity wa matope pa ndondomeko kusakaniza ndi kusalala yomanga.

2.2. Chifukwa cha mawonekedwe ake a mamolekyu, njira ya HPMC imapangitsa kuti madzi a mumatope asakhale ovuta kutaya, ndipo amawamasula pang'onopang'ono kwa nthawi yaitali, ndikupangitsa kuti matope azikhala ndi madzi osungira bwino komanso omangidwa. Zingalepheretse madzi kuyenda mofulumira kuchokera kumatope kupita kumunsi, kotero kuti madzi osungidwa amakhalabe pamwamba pa zinthu zatsopano, zomwe zingathe kulimbikitsa hydration ya simenti ndikuwonjezera mphamvu yomaliza. Makamaka ngati mawonekedwe okhudzana ndi matope a simenti, pulasitala, ndi zomatira ataya madzi, gawo ili silidzakhala ndi mphamvu komanso pafupifupi palibe mphamvu yogwirizana. Nthawi zambiri, pamwamba pa kukhudzana ndi zipangizo zonsezi ndi adsorbents, mochuluka kapena mocheperapo kuyamwa madzi kuchokera pamwamba, chifukwa chosakwanira hydration wa gawo ili, kupanga simenti matope ndi ceramic matailosi gawo lapansi ndi matailosi ceramic kapena pulasitala ndi makoma The chomangira mphamvu pakati. pamwamba amachepetsa.

Pokonzekera matope, kusunga madzi kwa HPMC ndi ntchito yaikulu. Zatsimikiziridwa kuti kusungirako madzi kumatha kufika 95%. Kuwonjezeka kwa kulemera kwa maselo a HPMC ndi kuwonjezeka kwa kuchuluka kwa simenti kudzathandiza kuti madzi asungidwe ndi mphamvu zomangira matope.

Chitsanzo: Popeza zomatira za matailosi ziyenera kukhala ndi mphamvu zapamwamba pakati pa gawo lapansi ndi matayala, zomatira zimakhudzidwa ndi kutsekemera kwa madzi kuchokera ku magwero awiri; gawo lapansi (khoma) pamwamba ndi matailosi. Makamaka matailosi, khalidweli limasiyana kwambiri, ena amakhala ndi pores akuluakulu, ndipo matayala amakhala ndi mlingo wochuluka wa kuyamwa kwa madzi, zomwe zimawononga ntchito yomangirira. Wosungira madzi ndikofunikira kwambiri, ndipo kuwonjezera HPMC kumatha kukwaniritsa izi.

2.3. HPMC ndi yokhazikika ku asidi ndi alkali, ndipo njira yake yamadzimadzi imakhala yokhazikika pa pH = 2 ~ 12. Madzi a caustic ndi laimu sakhala ndi zotsatira zochepa pa ntchito yake, koma alkali amatha kufulumizitsa kusungunuka kwake ndikuwonjezera kukhuthala kwake pang'ono.

2.4. Ntchito yomanga matope ophatikizidwa ndi HPMC yasinthidwa kwambiri. Mtondo umawoneka ngati "wochuluka", womwe ukhoza kupangitsa kuti makoma a khoma azikhala odzaza, osalala pamwamba, kupanga matailosi kapena njerwa ndi chomangira chapansi chokhazikika mwamphamvu, ndipo chikhoza kutalikitsa nthawi yogwira ntchito, yoyenera kumanga Malo akuluakulu.

2.5. HPMC ndi electrolyte yopanda ionic komanso yopanda polymeric, yomwe imakhala yosasunthika muzitsulo zamadzimadzi ndi mchere wachitsulo ndi ma electrolyte a organic, ndipo ikhoza kuwonjezeredwa ku zipangizo zomangira kwa nthawi yaitali kuti zitsimikizire kukhazikika kwake.