Hydroxyethyl cellulose (HEC) ndi polima yopanda ionic, yosungunuka m'madzi yochokera ku cellulose kudzera m'magulu angapo amankhwala. Amagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana monga zodzoladzola, mankhwala, ndi zomangamanga chifukwa cha kukhuthala kwake, kukhazikika, komanso kumanga. Kusungunuka kwa hydroxyethyl cellulose si lingaliro lolunjika, chifukwa silisungunuka mwanjira wamba ngati zitsulo kapena mankhwala enaake. M'malo mwake, imawola ndi kutentha isanafike posungunuka kwenikweni.
1. Kuyamba kwa Hydroxyethyl Cellulose (HEC)
Hydroxyethyl cellulose ndi yochokera ku cellulose, yomwe ndi polima wachilengedwe wopezeka m'makoma a zomera. Ma cellulose amapangidwa ndi mayunitsi obwerezabwereza omwe amalumikizidwa pamodzi ndi ma β-1,4 glycosidic bond. Ma cellulose a Hydroxyethyl amapangidwa ndi kusintha kwa mankhwala a cellulose kudzera mu etherification ndi ethylene oxide, zomwe zimapangitsa kuti magulu a hydroxyethyl (-CH2CH2OH) akhazikitsidwe pamsana wa cellulose. Kusintha kumeneku kumapereka kusungunuka kwamadzi ndi ntchito zosiyanasiyana ku HEC.
2.Katundu wa Hydroxyethyl Cellulose
Kusungunuka kwamadzi: Chimodzi mwazinthu zazikulu za HEC ndi kusungunuka kwake kwamadzi. Akamwazikana m'madzi, HEC imapanga mayankho omveka bwino kapena pang'ono opalescent kutengera ndende ya polima ndi zina zomwe zimapangidwira.
Thickening Agent: HEC imagwiritsidwa ntchito kwambiri ngati thickening wothandizira pazinthu zosiyanasiyana monga utoto, zomatira, zodzoladzola, ndi zinthu zosamalira anthu. Amapereka mamasukidwe akayendedwe ku mapangidwe awa, kuwongolera kukhazikika kwawo komanso magwiridwe antchito.
Katundu Wopanga Mafilimu: HEC imatha kupanga makanema owonda, osinthika akatulutsidwa kuchokera kumayankho ake amadzi. Mafilimuwa ali ndi mphamvu zamakina abwino komanso zotchinga, zomwe zimapangitsa kuti zikhale zothandiza pakupaka ndi ntchito zina.
Nature Non-ionic: HEC ndi polymer yosakhala ya ionic, kutanthauza kuti ilibe mtengo uliwonse pamapangidwe ake. Katunduyu amapangitsa kuti azigwirizana ndi mitundu yambiri yamankhwala ena komanso zopangira zopangira.
Kukhazikika kwa pH: HEC imawonetsa kukhazikika bwino pamitundu yambiri ya pH, makamaka kuchokera ku acidic kupita ku zinthu zamchere. Katunduyu amathandizira kusinthasintha kwake mumitundu yosiyanasiyana.
Kukhazikika kwa Kutentha: Ngakhale HEC ilibe malo osungunuka, imawonongeka ndi kutentha kwapamwamba. Kutentha kwenikweni kumene kuwola kumachitika kumasiyana malinga ndi zinthu monga kulemera kwa maselo, kuchuluka kwa kusintha, ndi kupezeka kwa zonyansa.
3.Magwiritsidwe a Hydroxyethyl Cellulose
Utoto ndi zokutira: HEC amagwiritsidwa ntchito ngati thickening wothandizira mu madzi utoto utoto ndi zokutira kulamulira rheological katundu wawo ndi kupewa kugwa kapena kudontha.
Zopangira Zosamalira Munthu: HEC imapezeka muzinthu zambiri zosamalira anthu monga ma shampoos, mafuta odzola, mafuta opaka, ndi ma gels, pomwe imakhala ngati thickener, stabilizer, and suspending agent.
Mankhwala: M'mapangidwe a mankhwala, HEC imagwiritsidwa ntchito poyimitsa pakamwa, njira za ophthalmic, ndi zopaka pamutu kuti zitheke kupititsa patsogolo kukhuthala, kupititsa patsogolo kukhazikika, ndi kulamulira kutulutsidwa kwa mankhwala.
Zipangizo Zomangamanga: HEC imawonjezedwa kuzinthu za simenti monga zomatira matailosi, ma grouts, ndi matope kuti apititse patsogolo ntchito, kusunga madzi, ndi kumamatira.
Makampani a Chakudya: HEC nthawi zina imagwiritsidwa ntchito popanga chakudya ngati chowonjezera komanso chokhazikika, ngakhale kuti kugwiritsidwa ntchito kwake sikofala kwambiri poyerekeza ndi ma hydrocolloids ena monga xanthan chingamu kapena guar chingamu.
4.Makhalidwe a HEC pansi pa Zosiyana Zosiyana
Kuthetsa Makhalidwe: Kukhuthala kwa mayankho a HEC kumadalira zinthu monga ndende ya polima, kulemera kwa maselo, kuchuluka kwa m'malo, ndi kutentha. Kuchulukirachulukira kwa ma polima ndi kulemera kwa mamolekyulu nthawi zambiri kumapangitsa kuti ma viscosity apamwamba.
Kutentha Kwachidziwitso: Ngakhale HEC imakhala yokhazikika pa kutentha kwakukulu, kukhuthala kwake kungachepetse kutentha kwakukulu chifukwa cha kuchepa kwa kuyanjana kwa polima-solvent. Komabe, izi zimasinthidwa pakazizira.
Kugwirizana: HEC imagwirizana ndi zosakaniza zomwe zimagwiritsidwa ntchito kwambiri popanga, koma ntchito yake imatha kukhudzidwa ndi zinthu monga pH, electrolyte concentration, ndi kupezeka kwa zowonjezera zina.
Kukhazikika Kosungirako: Mayankho a HEC nthawi zambiri amakhala okhazikika pansi pazikhalidwe zosungirako zoyenera, koma amatha kuwonongeka ndi tizilombo tating'onoting'ono pakapita nthawi ngati sasungidwa mokwanira ndi ma antimicrobial agents.
Hydroxyethyl cellulose (HEC) ndi polima wosunthika wokhala ndi ntchito zosiyanasiyana m'mafakitale osiyanasiyana. Kuphatikizika kwake kwapadera kwa zinthu, kuphatikiza kusungunuka kwamadzi, kukulitsa mphamvu, kupanga mafilimu, komanso kukhazikika kwa pH, kumapangitsa kuti ikhale yofunikira kwambiri pamapangidwe kuyambira utoto ndi zokutira kupita kuzinthu zosamalira anthu ndi mankhwala. Ngakhale kuti HEC ilibe malo osungunuka, khalidwe lake pansi pazikhalidwe zosiyanasiyana, monga kutentha ndi pH, zimakhudza momwe ntchito zake zimagwirira ntchito. Kumvetsetsa katundu ndi makhalidwe awa ndikofunikira kuti pakhale mphamvu ya HEC muzojambula zosiyanasiyana ndikuwonetsetsa ubwino ndi kukhazikika kwa zinthu zomaliza.
Nthawi yotumiza: Apr-10-2024