Methyl Hydroxyethyl Cellulose (MHEC) yosungunuka mu matope onyowa

Methyl Hydroxyethyl Cellulose (MHEC)ndi ether ya cellulose yosakhala ionic yomwe imagwiritsidwa ntchito kwambiri popanga zinthu zomangira, makamaka mu matope onyowa, ndipo imagwira ntchito yofunika kwambiri. Kusungunuka kwa madzi ndi kapangidwe kake ka molekyulu kumapangitsa kuti ikhale yankho lokhuthala m'madzi, zomwe zimapangitsa kuti matopewo akhale ndi mphamvu zabwino zogwirira ntchito, kusunga madzi komanso kusinthasintha kwa zomangamanga.

1. Makhalidwe oyambira a MHEC

MHEC ndi chinthu chochokera ku cellulose ether chomwe chimapangidwa poyambitsa magulu a methyl ndi hydroxyethyl mu cellulose yachilengedwe kudzera mu etherification reaction. Chili ndi madzi abwino osungunuka, kupanga filimu, kusunga madzi ndi kumamatira. Chimakhala chokhazikika pansi pa mikhalidwe yopanda tsankho komanso ya alkaline ndipo chimagwirizana bwino ndi chilengedwe komanso chitetezo cha chilengedwe.

MHEC imasungunuka m'madzi ozizira kutentha kwa chipinda kuti ipange yankho lowonekera bwino la colloidal, ndipo silisungunuka m'madzi otentha kapena zinthu zambiri zachilengedwe. Njira yake yosungunuka ndi njira yokulirakulira-kufalikira-kusungunuka, ndipo siimaphatikizapo zochita za mankhwala.

2. Njira yosungunula MHEC mu matope onyowa

Mu matope onyowa, MHEC nthawi zambiri imawonjezeredwa ku chisakanizo chouma mu mawonekedwe a ufa, kenako imasungunuka pang'onopang'ono panthawi yothira madzi ndikusakaniza:

Gawo loyamba - kuyamwa ndi kutupa kwa madzi: Tinthu ta MHEC timayamwa madzi ndi kutupa pamwamba pake titakhudza madzi, zomwe zimapangitsa kuti pakhale gel.

Gawo lapakati - kufalikira ndi kutupa: Ndi kusonkhezera, gawo la kapangidwe ka colloidal limawonongeka, ndipo MHEC imayamba kufalikira mu dongosolo lonse.

Gawo lomaliza - kusungunuka kwathunthu: Pambuyo posakaniza mosalekeza ndi nthawi inayake, MHEC imasungunuka kwathunthu kuti ipange yankho lokhazikika la polima, lomwe limagawidwa mofanana mu matope.

Mu ntchito zenizeni, kuchuluka kwa kusungunuka kwa MHEC kudzakhudzidwa ndi mphamvu yosakaniza, kutentha kwa madzi, kukula kwa tinthu, ndi zinthu zina zomwe zili mu fomula (monga simenti, gypsum, mchenga, ndi zina zotero). Kuwongolera bwino magawo awa kungapewe vuto la kusonkhana kapena kusungunuka kosakwanira.

3. Ntchito zazikulu za MHEC mumatope onyowa

3.1. Kulimbikitsa kusunga madzi

Chofunikira kwambiri cha MHEC ndikukweza kwambiri mphamvu yosungira madzi mu matope, kuchepetsa kutuluka kwa madzi mwachangu, kukulitsa nthawi yochitira madzi a simenti, potero kukulitsa mphamvu ndi mphamvu zomangira, ndikuletsa kusweka msanga.

3.2. Kuwongolera magwiridwe antchito a zomangamanga

Chifukwa cha kukhuthala ndi kukhuthala kwa MHEC, matopewa amagwira ntchito bwino, amasinthasintha komanso amafalikira bwino, amachepetsa kuuma kwa kapangidwe kake komanso amawongolera magwiridwe antchito. Makamaka popaka pulasitala ndi matailosi, amatha kuletsa matopewo kugwa ndi kutsetsereka.

3.3. Kuwongolera magwiridwe antchito a mgwirizano

Kapangidwe ka netiweki ya colloidal yopangidwa ndi MHEC mu matope amawonjezera mphamvu yolumikizirana pakati pa matope ndi gawo loyambira, makamaka pomanga pamwamba kapena pamwamba, zomwe zimapangitsa kuti matope asagwe ndikuwonjezera kudalirika kwa zomangamanga.

3.4. Sinthani kusinthasintha ndi kusinthasintha

Mwa kusintha kuchuluka kwa MHEC, kusinthasintha ndi kachitidwe ka rheological ka matope onyowa kumatha kulamulidwa, kuti akhale ndi kusinthasintha koyenera, komwe kuli kosavuta kumanga, ndipo sikukhudza zotsatira za kuumba chifukwa cha kuyenda kwambiri kwa madzi.

3.5. Kuwongolera magwiridwe antchito oletsa kutsetsereka

Mu ntchito monga zomatira za matailosi ndi zomatira zomangira, MHEC imatha kuletsa kutsetsereka kwa matope, kukonza kukhazikika kwa malo omangira, ndikukwaniritsa zofunikira pakupanga matailosi ozungulira ndi matailosi akuluakulu.

4. Zotsatira za mlingo wa MHEC pa magwiridwe antchito a matope

Kuchuluka kwa MHEC komwe kumawonjezeredwa nthawi zambiri kumayendetsedwa pakati pa 0.1% ndi 0.5% (kutengera kuchuluka kwa zinthu zouma). Zotsatira za kuchuluka kosiyanasiyana pakugwira ntchito kwa matope ndi izi:

Mlingo wochepa (<0.1%): kusunga madzi kwawonjezeka pang'ono, koma kusintha kwa magwiridwe antchito a zomangamanga sikuonekera.

Mlingo wapakati (0.2% ~ 0.4%): Kugwira ntchito bwino kwambiri, kukulitsa bwino kusunga madzi, kugwira ntchito bwino kwa zomangamanga, ndi mphamvu yolumikizirana.

Kugwiritsa ntchito mopitirira muyeso (>0.5%): Kungayambitse kukhuthala kwambiri kwa matope, kuchepetsa kusinthasintha kwa madzi, ndikuwonjezera nthawi yoyika.

Chifukwa chake, mu kapangidwe ka fomula yeniyeni, ndikofunikira kudziwa kuchuluka koyenera kowonjezera kwa MHEC kudzera mu zoyeserera kuti mupeze zotsatira zabwino zogwiritsira ntchito.

5. Kugwirizana ndi zowonjezera zina

MHEC ingagwiritsidwe ntchito limodzi ndi zowonjezera zosiyanasiyana, monga:

Ndi ufa wa latex wosungunukanso (VAE): zimathandizira kusinthasintha ndi mphamvu yomangirira ya matope;

Ndi zinthu zochepetsera kutentha kwa simenti: chepetsani madzi ochulukirapo, gwirizanani ndi MHEC kuti muwongolere zenera lomanga;

Ndi zodzaza/zosakaniza za mchere: gwirizanitsani kusinthasintha ndi kukula kwa mphamvu, khazikitsani bwino kapangidwe ka matope.

Monga chowonjezera chofunikira mu matope onyowa,Hyxyethyl methylcellulose (MHEC) imagwira ntchito zambiri pakukhuthala kwa maselo., kusunga madzi, kukulitsa ndi kukonza zomangamanga mu dongosolo la matope kudzera mu makhalidwe ake abwino osungunuka m'madzi. Ndi chowonjezera chofunikira kwambiri pazida zamakono zomangira. Mwa kusankha mwasayansi mitundu ndi mlingo, MHEC imatha kukonza bwino magwiridwe antchito a matope, kukwaniritsa zosowa zamitundu yosiyanasiyana yomangira, ndikuthandizira kumanga kobiriwira komanso kogwira mtima.