Hydroxyethyl cellulose ndi mtundu wapakati mpaka wapamwamba wa cellulose ether, womwe umagwiritsidwa ntchito ngati chokhuthala komanso chokhazikika pa zokutira zochokera m'madzi, makamaka pamene kukhuthala kosungirako kuli kwakukulu ndipo kukhuthala kogwiritsidwa ntchito kuli kochepa. Cellulose ether ndi yosavuta kufalikira m'madzi ozizira okhala ndi pH ≤ 7, koma ndi yosavuta kusonkhana mumadzi amchere okhala ndi pH ≥ 7.5, kotero tiyenera kusamala za kufalikira kwa cellulose ether.
Makhalidwe ndi ntchito za hydroxyethyl cellulose:
1. Chokhuthala madzi chosakhala cha ionic chotsutsana ndi ma enzyme, chomwe chingagwiritsidwe ntchito pamlingo wosiyanasiyana wa pH (PH=2-12).
2. Yosavuta kufalitsa, imatha kuwonjezeredwa mwachindunji mu mawonekedwe a ufa wouma kapena mu mawonekedwe a slurry pogaya utoto ndi zodzaza.
3. Kapangidwe kabwino kwambiri. Ili ndi ubwino wosunga ndalama, sikophweka kudontha ndi kupachika, komanso kukana kupopera madzi.
4. Kugwirizana bwino ndi zinthu zosiyanasiyana zoyeretsera ndi zotetezera zomwe zimagwiritsidwa ntchito mu utoto wa latex.
5. Kukhuthala kwa malo osungiramo zinthu kumakhala kokhazikika, zomwe zingalepheretse kukhuthala kwa utoto wa latex kuchepa chifukwa cha kuwonongeka kwa ma enzyme mu hydroxyethyl cellulose.
Katundu wa Hydroxyethyl Cellulose
Hydroxyethyl cellulose ether ndi polima yosasungunuka m'madzi. Ndi ufa woyera kapena wachikasu wopepuka womwe umayenda mosavuta. Nthawi zambiri susungunuka m'zinthu zambiri zachilengedwe.
1. HEC imasungunuka m'madzi otentha kapena m'madzi ozizira, ndipo siigwa kwambiri kutentha kwambiri kapena kuwira, zomwe zimapangitsa kuti ikhale ndi mitundu yosiyanasiyana ya kusungunuka ndi kukhuthala, komanso gelation yosatentha.
2. Si ionic ndipo imatha kukhala limodzi ndi ma polima ena osungunuka m'madzi, ma surfactants, ndi mchere. Ndi chokhuthala chabwino kwambiri cha colloidal cha mayankho okhala ndi ma electrolyte okhala ndi kuchuluka kwakukulu.
3. Mphamvu yosungira madzi ndi yowirikiza kawiri kuposa ya methyl cellulose, ndipo ili ndi kayendedwe kabwino ka madzi.
4. Poyerekeza ndi methyl cellulose yodziwika bwino ndi hydroxypropyl methyl cellulose, mphamvu yobalalitsira ya HEC ndiyo yoyipa kwambiri, koma mphamvu yoteteza ya colloid ndiyo yamphamvu kwambiri (yokongola).
Kukhuthala
Zimakhudza momwe ntchito ikuyendera, monga: kulimba, kukana kupopera, kukana kutayika; kapangidwe kapadera ka netiweki ya cellulose ether kamatha kukhazikika mu ufa mu dongosolo lopaka utoto, kuchepetsa kukhazikika kwake, ndikupangitsa dongosololi kukhala ndi mphamvu yabwino yosungira.
Kukana madzi bwino
Pambuyo poti utotowo wauma kwathunthu, umakhala ndi kukana bwino madzi. Izi zimasonyeza bwino kufunika kwa kukana madzi mu dongosolo la PVC yapamwamba. Kuchokera kuzinthu zakunja kupita ku China, mu dongosolo la PVC yapamwamba, kuchuluka kwa ether ya cellulose yomwe yawonjezeredwa ndi 4-6‰.
kusunga bwino madzi
Hydroxyethyl cellulose imatha kutalikitsa nthawi yowonekera ndikulamulira nthawi youma kuti ipange filimu yabwino; pakati pawo, kusunga madzi kwa methyl cellulose ndi hypromellose kumatsika kwambiri kuposa 40°C, ndipo maphunziro ena akunja amakhulupirira kuti izi zitha kuchepetsedwa ndi 50%, mwayi wokhala ndi mavuto nthawi yachilimwe komanso kutentha kwambiri umawonjezeka kwambiri.
Kukhazikika kwabwino kuti muchepetse kugwedezeka kwa utoto
Kuchotsa sedimentation, syneresis ndi flocculation; pakadali pano, hydroxyethyl cellulose ether ndi mtundu wa mankhwala osakhala a ionic. Sichitapo kanthu ndi zowonjezera zosiyanasiyana mu dongosolo.
Kugwirizana bwino ndi dongosolo la mitundu yambiri
Kugwirizana bwino kwa mitundu ya utoto, utoto ndi zodzaza; hydroxyethyl cellulose ether ili ndi mtundu wabwino kwambiri, koma pambuyo pa kusintha, monga methyl ndi ethyl, padzakhala zoopsa zobisika za kugwirizanitsa utoto.
Kugwirizana bwino ndi zipangizo zosiyanasiyana
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Nthawi yotumizira: Feb-02-2023