Hydroxyethylcellulose (HEC) ndi polima wosungunuka m'madzi womwe umagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana komanso ogula tsiku lililonse, makamaka pazinthu zodzisamalira komanso zotsukira. Ili ndi kukhuthala kwabwino, kuyimitsa, kuyimitsa, kupanga filimu ndi ntchito zoteteza colloid, kotero imagwiritsidwa ntchito ngati thickener mu sopo wamadzimadzi.
1. Mapangidwe ndi katundu wa hydroxyethyl cellulose
HEC ndi yochokera ku nonionic yomwe imachokera ku cellulose kudzera mu etherification reaction ndipo imakhala ndi mphamvu yamphamvu ya hydration ndi hydrophilicity. Mamolekyu amtundu wa HEC amakhala ndi magulu ambiri a hydroxyethyl omwe amalowetsa maatomu a haidrojeni a cellulose yachilengedwe, kupanga mndandanda wamamolekyu amtali wautali. Mapangidwe a maselowa amalola HEC kuti ifufuze mwamsanga m'madzi kuti ipange njira yofanana ya viscous.
Katundu wofunikira wa HEC ndikusinthika kwake kumitundu yosiyanasiyana ya pH. Imasunga kukhuthala kwake pamitundu yambiri ya pH, ndikupangitsa kuti ikhale yopindulitsa kwambiri pazinthu monga sopo wamadzimadzi, omwe amatha kukhala ndi zosakaniza zingapo komanso kusintha kwa pH. Kuphatikiza apo, HEC ilinso ndi biocompatibility yabwino komanso chitetezo, ndipo ndiyoyenera kugwiritsidwa ntchito pazinthu zosiyanasiyana zomwe zimakumana ndi thupi la munthu, monga sopo wamadzimadzi, shampu, etc.
2. Kukhuthala kwa hydroxyethyl cellulose mu sopo wamadzimadzi
Mumadzimadzi sopo formulations, waukulu limagwirira ntchito ya HEC monga thickener ndi kuonjezera mamasukidwe akayendedwe a sopo madzi Kutha mu madzi kupanga viscous yankho. Makamaka, HEC ikasungunuka m'madzi, maunyolo ake a molekyulu amaphatikizana ndi mamolekyu amadzi kudzera mu ma intermolecular hydrogen bonds kuti apange maukonde ovuta. Kapangidwe ka maukonde kameneka kamatha kumanga mamolekyu ambiri amadzi, potero kumawonjezera kukhuthala kwa yankho.
Kukula kwa HEC kumagwirizana kwambiri ndi kulemera kwake kwa maselo ndi kuchuluka kwake. Nthawi zambiri, kulemera kwakukulu kwa molekyulu ya HEC, kumapangitsanso kukhuthala kwa yankho lopangidwa; panthawi imodzimodziyo, kuchuluka kwa HEC mu njira yothetsera vutoli, ndizodziwikiratu kuti makulidwe ake adzakhala. Komabe, muzogwiritsira ntchito, kuwerengera kwakukulu kwa HEC kungapangitse kuti yankho likhale lowoneka bwino kwambiri komanso limakhudza zochitika za wogwiritsa ntchito, choncho ziyenera kuyang'aniridwa mosamala pakupanga mapangidwe.
3. Ubwino wa HEC thickening kwenikweni
HEC ili ndi maubwino angapo kuposa ma thickeners ena. Choyamba, imakhala ndi kusungunuka kwamadzi kwabwino kwambiri ndipo imatha kusungunuka mwachangu m'madzi ozizira kapena otentha ndikupanga njira yofananira ya viscous. Kachiwiri, HEC sikuti imangokulitsa bwino m'malo otsika, komanso imapereka mphamvu yokhazikika yolimba, yomwe ndi yofunika kwambiri pazinthu za sopo zamadzimadzi zomwe zimafunikira kusungidwa kwanthawi yayitali. Chachitatu, monga thickener osakhala ionic, HEC ikhoza kukhala ndi viscosity yokhazikika pansi pa pH zosiyana siyana ndipo sichikhudzidwa mosavuta ndi zigawo zina mu dongosolo.
4. Kugwiritsa ntchito HEC pakupanga sopo wamadzimadzi
Popanga kwenikweni, HEC nthawi zambiri imawonjezeredwa ku sopo wamadzimadzi mu mawonekedwe a ufa. Pofuna kuonetsetsa kuti HEC ikhoza kusungunuka kwathunthu ndikugwiritsa ntchito mphamvu yake yowonjezera, nthawi zambiri zimakhala zofunikira kumvetsera kufanana kwa kusakaniza pamene mukuwonjezera HEC kuti mupewe kuphatikizika. Kuphatikiza apo, pofuna kupititsa patsogolo ntchito ya sopo wamadzimadzi, HEC imagwiritsidwa ntchito molumikizana ndi zowuma, ma humectants kapena ma surfactants kuti akwaniritse mawonekedwe abwino azinthu komanso luso la ogwiritsa ntchito.
Monga chokhuthala bwino, hydroxyethyl cellulose imakhala ndi mwayi wogwiritsa ntchito sopo wamadzimadzi. Ikhoza kuonjezera mamasukidwe akayendedwe a chinthucho ndikuwongolera zomwe wogwiritsa ntchito amakumana nazo. Ilinso ndi mgwirizano wabwino komanso wokhazikika ndipo ndi yabwino kusankha sopo wamadzimadzi.
Nthawi yotumiza: Aug-19-2024