Ndi zinthu ziti zomwe zingakhudze kukhuthala kwa hydroxypropyl methylcellulose?

Pakuti ntchito chonyowa matope, hydroxypropyl methylcellulose ali wabwino thickening katundu, akhoza kwambiri kuonjezera kugwirizana luso pakati chonyowa matope ndi wosanjikiza m'munsi, komanso akhoza kusintha odana ndi sag ntchito ya matope, kotero chimagwiritsidwa ntchito popaka matope, kunja. dongosolo lotsekereza khoma ndi matope omangira njerwa.

Pakuti thickening zotsatira za mapadi ether, kungathenso kuonjezera homogeneity ndi odana ndi kubalalitsidwa mphamvu mwatsopano wosakanizidwa simenti zochokera zipangizo, komanso kupewa mavuto a delamination, tsankho ndi magazi mu matope ndi konkire. Itha kugwiritsidwa ntchito pa konkire yolimba ya Fiber, konkire ya pansi pamadzi ndi konkriti yodzipangira yokha.

Hydroxypropyl methylcellulose imatha kukulitsa magwiridwe antchito a simenti. Ntchitoyi makamaka imachokera ku viscosity ya cellulose ether solution. Nthawi zambiri, manambala index ya mamasukidwe akayendedwe ntchito kuweruza mamasukidwe akayendedwe a cellulose etha njira, pamene mapadi kukhuthala kwa ether nthawi zambiri makamaka amatanthauza ndende ya mapadi etere njira, kawirikawiri 2%, pa kutentha kwapadera, monga madigiri 20 ndi kusinthasintha, pogwiritsa ntchito chida choyezera chodziwika, monga viscometer yozungulira. Viscosity mtengo.

Viscosity ndi imodzi mwazinthu zofunika kwambiri zowunika momwe cellulose ether imagwirira ntchito. Kukwezera kukhuthala kwa hydroxypropyl methylcellulose solution, kumapangitsanso kukhuthala kwa zinthu zopangidwa ndi simenti, komanso kumamatira kwa gawo lapansi. Panthawi imodzimodziyo, ili ndi Mphamvu yotsutsa-kugwedezeka ndi mphamvu zotsutsana ndi kubalalitsidwa zimakhala zamphamvu, koma ngati kukhuthala kwake kuli kwakukulu kwambiri, kumakhudza kayendetsedwe ka kayendetsedwe kake ndi kugwiritsira ntchito zipangizo za simenti.

Ndi zinthu ziti zomwe zingakhudze kukhuthala kwa hydroxypropyl methylcellulose? Makamaka zimadalira zifukwa zotsatirazi.

1. Kuchuluka kwa kuchuluka kwa polymerization ya cellulose etha ya hydroxypropyl methylcellulose, kukulirakulira kwake kwa molekyulu, zomwe zimapangitsa kukhuthala kwake kwamadzimadzi.

2. Ngati kuchuluka kapena kuchuluka kwa cellulose ether ndikwambiri, kukhuthala kwake kwamadzimadzi kumakhala kwakukulu. Komabe, tiyenera kusamala posankha kuchuluka koyenera kwa cellulose ether poigwiritsa ntchito, makamaka kupewa kuchuluka kwa cellulose ether. Zidzakhudza ntchito ya matope ndi konkriti.

3. Mofanana ndi zakumwa zambiri, kukhuthala kwa cellulose ether solution kudzachepa ndi kuwonjezeka kwa kutentha, ndipo kuchuluka kwa cellulose ether kumachepetsa kutentha. Kuchuluka kwakeko.

4. Ma cellulose ether solution nthawi zambiri amakhala pseudoplastic, omwe amakhala ndi mikhalidwe ya kumeta ubweya wa ubweya. Kuchuluka kwa kumeta ubweya wa ubweya panthawi yoyesedwa, kumachepetsa kukhuthala.

Kugwirizana kwa matope kudzachepetsedwa chifukwa cha mphamvu yakunja, yomwe imathandizanso kupukuta kumanga matope, zomwe zimapangitsa kuti pakhale mgwirizano wabwino komanso kugwira ntchito kwa matope nthawi yomweyo. Komabe, ngati mankhwala a cellulose ether ali ndi ndende yayikulu Pamene mamasukidwe akayendedwe ndi otsika komanso mamasukidwe ang'onoang'ono, amawonetsa mawonekedwe a Newtonian fluid. Pamene ndende ikuwonjezeka, yankho lidzawonetsa pang'onopang'ono makhalidwe a pseudoplastic fluid, ndipo ngati ndende ili pamwamba, pseudoplasticity idzakhala yoonekera kwambiri.