Hydroxyethyl cellulose (HEC) ndi polima wopanda ionic, wosungunuka m'madzi wotengedwa ku cellulose, polima wopezeka mwachilengedwe wopezeka m'makoma a cell a zomera.Amagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana monga mankhwala, zodzoladzola, utoto, zomatira, ndi zakudya chifukwa cha mawonekedwe ake apadera monga kukhuthala, kukhazikika, komanso kusunga madzi.Komabe, kukambirana za pH ya HEC kumafuna kumvetsetsa kwakukulu kwa katundu wake, kapangidwe kake, ndi ntchito zake.
Kumvetsetsa Ma cellulose a Hydroxyethyl (HEC):
1. Kapangidwe ka Chemical:
HEC imapangidwa ndi momwe cellulose imayendera ndi ethylene oxide, zomwe zimapangitsa kuti magulu a hydroxyethyl (-CH2CH2OH) akhazikitsidwe pamsana wa cellulose.
Digiri ya m'malo (DS) imatanthawuza kuchuluka kwa magulu a hydroxyethyl pa yuniti ya shuga mu unyolo wa cellulose ndikudziwitsa za HEC.Makhalidwe apamwamba a DS amachititsa kuti madzi asungunuke kwambiri komanso kutsika kwa viscosity.
2. Katundu:
HEC imasungunuka m'madzi ndipo imapanga njira zomveka bwino, zomwe zimapangitsa kuti zikhale zoyenera pazinthu zosiyanasiyana zomwe zimafuna mawonekedwe owonekera.
Imawonetsa khalidwe la pseudoplastic, kutanthauza kuti kukhuthala kwake kumachepa pansi pa kumeta ubweya wa ubweya, kulola kuti ikhale yosavuta kugwiritsa ntchito ndikugwira.
Kuthamanga kwa mayankho a HEC kumakhudzidwa ndi zinthu monga ndende, kutentha, pH, ndi kukhalapo kwa mchere kapena zowonjezera zina.
3. Mapulogalamu:
Mankhwala: HEC imagwiritsidwa ntchito ngati thickener ndi stabilizer pakamwa ndi apakhungu mankhwala formulations monga mafuta odzola, creams, ndi suspensions.
Zodzoladzola: Ndi chinthu chodziwika bwino muzinthu zosamalira anthu kuphatikiza ma shampoos, mafuta odzola, ndi zopaka mafuta chifukwa cha kukhuthala kwake komanso kukulitsa.
Utoto ndi Zopaka: HEC imawonjezeredwa ku utoto, zokutira, ndi zomatira kuti ziwongolere kukhuthala, kuwongolera magwiridwe antchito, komanso kukulitsa mapangidwe amafilimu.
Makampani a Chakudya: M'zakudya, HEC imagwira ntchito ngati chowonjezera, chokhazikika, ndi emulsifier muzinthu monga sosi, mavalidwe, ndi mkaka.
Phindu la Hydroxyethyl Cellulose (HEC):
1. Kudalira pH:
PH ya yankho lomwe lili ndi HEC lingakhudze machitidwe ake ndi magwiridwe antchito osiyanasiyana.
Kawirikawiri, HEC imakhala yosasunthika pamtunda wambiri wa pH, makamaka pakati pa pH 2 ndi pH 12. Komabe, zovuta za pH zingakhudze katundu wake ndi kukhazikika kwake.
2. pH Zotsatira pa Viscosity:
Kukhuthala kwa mayankho a HEC kumatha kudalira pH, makamaka pamitengo yapamwamba kapena yotsika pH.
Pafupi ndi gawo la pH (pH 5-8), mayankho a HEC nthawi zambiri amawonetsa kukhuthala kwawo kwakukulu.
Pazigawo zotsika kwambiri kapena zapamwamba za pH, msana wa cellulose ukhoza kukumana ndi hydrolysis, zomwe zimapangitsa kuchepa kwa mamasukidwe akayendedwe ndi bata.
3. Kusintha pH:
M'mapangidwe pomwe kusintha kwa pH kuli kofunikira, ma buffers nthawi zambiri amagwiritsidwa ntchito kusunga pH yomwe mukufuna.
Ma buffers wamba monga citrate kapena phosphate buffers amagwirizana ndi HEC ndipo amathandizira kukhazikika kwake mkati mwa mtundu wina wa pH.
4. Zolinga Zogwiritsira Ntchito:
Opanga ayenera kuganizira za pH yogwirizana ndi HEC ndi zosakaniza zina zomwe zimapangidwira.
Nthawi zina, kusintha kwa pH ya mapangidwe kungakhale kofunikira kuti akwaniritse bwino ntchito ya HEC.
Hydroxyethyl cellulose (HEC) ndi polima wosunthika wokhala ndi ntchito zambiri m'mafakitale osiyanasiyana.Ngakhale kukhazikika kwake kwa pH kumakhala kolimba mosiyanasiyana, kuchulukira kwa pH kumatha kukhudza magwiridwe ake komanso kukhazikika kwake.Kumvetsetsa kudalira kwa pH kwa HEC ndikofunikira pakupanga zinthu zogwira mtima komanso zokhazikika muzamankhwala, zodzoladzola, utoto, zomatira, ndi zakudya.Poganizira kuyanjana kwa pH ndikugwiritsa ntchito njira zoyenera zopangidwira, HEC ikhoza kupitiriza kukhala chinthu chofunika kwambiri pamitundu yosiyanasiyana ya ntchito.
Nthawi yotumiza: Apr-15-2024