Kodi kukhuthala kwa cellulose ether kumakhudza bwanji ntchito ya matope a gypsum?

Ma cellulose ethers amagwiritsidwa ntchito ngati zowonjezera pazinthu zomangira chifukwa cha kuthekera kwawo kusintha mawonekedwe a rheological ndi makina azinthuzo. Makamaka, nthawi zambiri amaphatikizidwa mumatope a gypsum kuti apititse patsogolo madzi, kugwira ntchito komanso kumamatira. Komabe, zotsatira zenizeni za cellulose ether viscosity pakuchita kwa matope a gypsum sizinafotokozedwebe. Pepalali likuwunikiranso zolemba zomwe zilipo pamutuwu ndikukambirana za mphamvu ya cellulose ether viscosity pamitengo ya matope a gypsum.

Ma cellulose ethers ndi ma polima osungunuka m'madzi ochokera ku cellulose, polima wachilengedwe wopezeka m'makoma a cellulose. Amagwiritsidwa ntchito kwambiri ngati zolimbitsa thupi, zomangira ndi zokhazikika m'mafakitale osiyanasiyana kuphatikiza chakudya, zodzoladzola, mankhwala ndi zida zomangira. Pomanga, nthawi zambiri amaphatikizidwa mumatope kuti apititse patsogolo kugwira ntchito, kumamatira komanso kulimba.

Gypsum ndi mchere wachilengedwe wopangidwa ndi calcium sulfate dihydrate. Amagwiritsidwa ntchito kwambiri pomanga chifukwa cha zinthu zake zosagwira moto komanso zomveka komanso zotsekemera zotentha. Gypsum mortar imagwiritsidwa ntchito ngati choyambira pamakoma ndi denga, komanso kumaliza ntchito yomanga zowuma.

Pamene cellulose ether anawonjezera gypsum matope, akhoza kusintha rheological katundu osakaniza. Rheology ndi kuphunzira kusinthika ndikuyenda kwa zinthu zomwe zili pansi pa kupsinjika. Mayendedwe a matope a gypsum amatha kudziwika ndi kukhuthala kwake, komwe ndi muyeso wa kukana kwake kuyenda. Kukhuthala kwa matope kumakhudzidwa ndi zinthu zingapo, kuphatikiza mtundu ndi kuchuluka kwa cellulose ether, kukula kwa tinthu ndi kugawa kwa gypsum, komanso kuchuluka kwa madzi ku simenti.

Ma viscosity cellulose ethers amakhala ndi chikoka chachikulu pamayendedwe a matope a gypsum kuposa ma ethers otsika. Mwachitsanzo, kafukufuku wasonyeza kuti kuwonjezera kukhuthala kwa hydroxypropylmethylcellulose (HPMC) ku matope a gypsum kumatha kuwonjezera kukhuthala kwa osakaniza ndikuwongolera magwiridwe antchito ake, pomwe HPMC yotsika kwambiri imakhala ndi zotsatira zochepa pamayendedwe oyenda amatope. Izi zikuwonetsa kuti magwiridwe antchito a matope a gypsum amadalira mtundu weniweni komanso kukhuthala kwa cellulose ether yomwe imagwiritsidwa ntchito.

Chimodzi mwazabwino zazikulu zophatikizira cellulose ether mu matope a gypsum ndikuti imathandizira kugwira ntchito kwa osakaniza. Kuthekera kumatanthauza kumasuka komwe kungasakanizike, kuyika ndi kuphatikizika. Zida za gypsum zogwira ntchito kwambiri zitha kuyikidwa pamalopo mosavuta, zomwe zimapangitsa kuti pakhale kutha, kofananako. Ma cellulose ethers amatha kupititsa patsogolo kusakanikirana kwa kusakaniza mwa kuchepetsa zochitika za tsankho ndi magazi, zomwe zimachitika pamene tinthu tambiri tambiri tomwe timatulutsa mumatope timatuluka mu kusakaniza panthawi yomanga.

Kuphatikiza pa kukhudza magwiridwe antchito, kukhuthala kwa cellulose ether kudzakhudzanso ntchito yomatira ya matope a gypsum. Kumamatira ndiko kuthekera kwa chinthu kulumikiza kumtunda wina. Kukhalapo kwa cellulose ether mu matope a gypsum kumatha kuwongolera kumamatira kwake pamtunda powonjezera malo olumikizana ndi kuchepetsa kuchuluka kwa mpweya womwe umatsekeredwa pakati pa malo. Ma etha a cellulose apamwamba kwambiri ndi othandiza kwambiri kuposa ma ethers otsika kwambiri pakuwongolera kumamatira chifukwa amapanga mgwirizano wamphamvu pakati pa malo.

Chinthu chinanso chofunikira cha matope a gypsum ndi nthawi yake yokhazikitsa, nthawi yomwe imatengera kuti kusakaniza kukhale kolimba ndikukula mphamvu. Kuyika nthawi ya matope a gypsum kungasinthidwe powonjezera mapadi a cellulose, omwe angakhudze njira ya hydration ya gypsum particles. Hydration ndi momwe mankhwala amachitira pamene madzi awonjezeredwa ku gypsum, zomwe zimapangitsa kuti makristasi a calcium sulfate dihydrate apangidwe.

Kukhuthala kwa cellulose ether kumakhudza kwambiri magwiridwe antchito a matope a gypsum. Apamwamba mamasukidwe akayendedwe mapadi ethers akhoza kusintha processability, zomatira katundu ndi kuika nthawi ya osakaniza, pamene m'munsi mamasukidwe akayendedwe etha angakhale ndi zotsatira zochepa pa katundu izi. Zotsatira zenizeni za cellulose etha viscosity zimadalira zinthu zambiri, kuphatikizapo mtundu ndi ndende ya ether, kukula kwa tinthu ndi kugawa kwa gypsum, ndi chiŵerengero cha madzi ku simenti. Kufufuza kwina kumafunika kuti mumvetse bwino mgwirizano wa cellulose ether viscosity ndi gypsum mortar properties, koma zolemba zomwe zilipo zikusonyeza kuti ichi ndi chinthu chofunikira kuganizira popanga zipangizo zomangira.