Cellulose etherZingathandize kwambiri kukonza bwino ntchito ya matope onyowa, ndipo ndi chowonjezera chachikulu chomwe chimakhudza momwe matope amagwirira ntchito. Kusankha bwino ma ether a cellulose amitundu yosiyanasiyana, kukhuthala kosiyanasiyana, kukula kwa tinthu tosiyanasiyana, madigiri osiyanasiyana a kukhuthala ndi kuchuluka kowonjezera kudzakhala ndi zotsatira zabwino pakuwongolera magwiridwe antchito a matope ouma.
Palinso ubale wabwino pakati pa kusinthasintha kwa simenti ndi mlingo wa cellulose ether. Cellulose ether imatha kukulitsa kwambiri kukhuthala kwa matope. Mlingo ukakhala waukulu, zotsatira zake zimakhala zoonekeratu. Madzi amadzi okhala ndi kukhuthala kwakukulu ali ndi thixotropy yambiri, yomwe ndi khalidwe lalikulu la cellulose ether.
Kukhuthala kwa kukhuthala kumadalira kuchuluka kwa polymerization ya cellulose ether, kuchuluka kwa yankho, kuchuluka kwa shear, kutentha ndi zina. Kapangidwe ka gelling ka yankho ndi kapadera kwa alkyl cellulose ndi zotumphukira zake zosinthidwa. Kapangidwe ka gelation kamagwirizana ndi kuchuluka kwa kusintha, kuchuluka kwa yankho ndi zowonjezera. Pa zotumphukira zosinthidwa za hydroxyalkyl, kapangidwe ka gel kamagwirizananso ndi kuchuluka kwa kusintha kwa hydroxyalkyl. 10%-15% yankho likhoza kukonzedwa kuti likhale ndi MC ndi HPMC yotsika kwambiri, 5%-10% yankho likhoza kukonzedwa kuti likhale ndi MC ndi HPMC yapakati, ndipo 2%-3% yankho likhoza kukonzedwa kuti likhale ndi MC ndi HPMC yokwera kwambiri. Nthawi zambiri magulu a viscosity a cellulose ether amawerengedwanso ndi 1%-2% yankho.
Kulemera kwakukulu kwa mamolekyuluether ya celluloseali ndi mphamvu yokhuthala kwambiri. Ma polima okhala ndi kulemera kosiyanasiyana kwa mamolekyulu ali ndi kukhuthala kosiyana mu yankho lomwelo. Mlingo wapamwamba. Kukhuthala komwe kumayang'aniridwa kungatheke pokhapokha powonjezera kuchuluka kwakukulu kwa ether yolemera pang'ono ya cellulose. Kukhuthala kwake sikudalira kwambiri kuchuluka kwa shear, ndipo kukhuthala kwakukulu kumafika ku kukhuthala komwe kukufunika, ndipo kuchuluka kowonjezera komwe kumafunika ndi kochepa, ndipo kukhuthala kumadalira mphamvu yokhuthala. Chifukwa chake, kuti pakhale kusinthasintha kwina, kuchuluka kwa ether ya cellulose (kuchuluka kwa yankho) ndi kukhuthala kwa yankho kuyenera kutsimikizika. Kutentha kwa gel kwa yankho kumachepanso motsatizana ndi kuwonjezeka kwa kuchuluka kwa yankho, ndi ma gels pa kutentha kwa chipinda atafika pa kuchuluka kwina. Kuchuluka kwa gelling kwa HPMC kumakhala kwakukulu pa kutentha kwa chipinda.
Nthawi yotumizira: Epulo-28-2024