Hydroxyethyl cellulose (HEC) ndi madzi osungunuka omwe si a ionic cellulose ether. Amagwiritsidwa ntchito kwambiri mu zokutira zokhala ndi madzi chifukwa cha kukhuthala bwino, emulsifying, kupanga mafilimu ndi kuyimitsa katundu. Monga thickener ndi stabilizer mu zokutira, HEC akhoza kwambiri kusintha rheological katundu ndi paintability zokutira.
1. Ntchito zazikulu za hydroxyethyl cellulose
Mu zokutira zokhala ndi madzi, ntchito zazikulu za HEC zikuwonetsedwa m'magawo awa:
Kukula kwamphamvu: HEC ili ndi mphamvu yakukhuthala kwambiri, yomwe imatha kupititsa patsogolo kukhuthala ndi kuyimitsidwa kwa zokutira zokhala ndi madzi ndikuletsa inki ndi zodzaza mu zokutira kuti zisakhazikike.
Kupititsa patsogolo rheology: HEC ikhoza kusintha madzimadzi mu zokutira zokhala ndi madzi kuti ziwonetsere kukhuthala kochepa pansi pa kukameta ubweya wambiri, kuti zikhale zosavuta kufalikira pojambula, pamene zikuwonetsa kukhuthala kwapamwamba pansi pazikhalidwe zosasunthika, motero kuchepetsa kutuluka kwa utoto. kupachika chodabwitsa.
Kukhazikika kokhazikika: HEC ili ndi kukana bwino kwa kuzizira komanso kusungika kosungirako, komwe kumatha kukulitsa nthawi ya alumali ya zokutira ndikuwonetsetsa bata m'malo osiyanasiyana.
Sinthani mawonekedwe opanga mafilimu: HEC imapanga filimu yosinthika utoto ukauma, kukulitsa kumamatira ndi kukana kwa filimu ya utoto ndikuwongolera magwiridwe antchito oteteza utoto.
2. Momwe mungagwiritsire ntchito HEC
Pogwiritsira ntchito HEC mu zokutira zokhala ndi madzi, njira zobalalitsira ndi zowonongeka ndi njira zowonjezera mwachindunji zimagwiritsidwa ntchito. Zotsatirazi ndi njira ndi njira zogwiritsidwira ntchito:
() 1. Pretreatment kupasuka HEC
HEC ndi ufa womwe ndi wovuta kusungunula mwachindunji komanso mosavuta kupanga clumps m'madzi. Chifukwa chake, musanawonjezere HEC, tikulimbikitsidwa kuti muwabalalitse. Zomwe zimachitika kawirikawiri ndi izi:
Sakanizani ndikubalalitsa: Pang'onopang'ono yonjezerani HEC m'madzi mofulumizitsa pang'onopang'ono kuti mupewe kupanga ma clumps. Kuchuluka kwa HEC yowonjezeredwa kuyenera kusinthidwa malinga ndi zofunikira za viscosity ya zokutira, zomwe zimawerengera 0.3% -1% ya chilinganizo chonse.
Pewani caking: Powonjezera HEC, mankhwala ochepa odana ndi caking, monga ethanol, propylene glycol, ndi zina zotero, akhoza kuwonjezeredwa m'madzi kuti ufa wa HEC uwonongeke mofanana ndi kuchepetsa kuthekera kwa caking.
(2). Njira yobalalitsira ndi kusungunula
Njira yobalalitsira ndi kusungunuka ndiyo kusungunula HEC padera kukhala madzi owoneka bwino panthawi yokonzekera utoto, ndikuwonjezera pa utoto. Masitepe enieni ndi awa:
Njira yowonongeka: HEC ndi yovuta kusungunuka pa kutentha kwabwino kapena kutsika, kotero madzi amatha kutentha moyenerera kuti afike kutentha kwa 30-40 ° C kuti afulumizitse kusungunuka kwa HEC.
Nthawi yoyambitsa: HEC imasungunuka pang'onopang'ono ndipo nthawi zambiri imafunika kugwedezeka kwa maola 0.5-2 mpaka itasungunuka kukhala madzi owoneka bwino kapena owoneka bwino.
Sinthani pH mtengo: Pambuyo pa HEC kusungunuka, pH mtengo wa yankho ukhoza kusinthidwa malinga ndi zosowa, kawirikawiri pakati pa 7-9, kuti ukhale wokhazikika wa zokutira.
(3). Njira yowonjezera yowonjezera
Njira yowonjezera yowonjezera ndikuwonjezera HEC mwachindunji muzitsulo zowonongeka panthawi yopangira zopangira, zomwe ziri zoyenera kuti zikhale ndi zofunikira zapadera. Chonde samalani mfundo zotsatirazi mukamagwira ntchito:
Yamitsani kaye kenako nyowa: OnjezaniHECku gawo louma la utoto wopangidwa ndi madzi poyamba, sakanizani mofanana ndi ufa wina, ndiyeno onjezerani madzi ndi zigawo zamadzimadzi kuti musagwirizane.
Kuwongolera kukameta ubweya: Powonjezera HEC ku zokutira, m'pofunika kugwiritsa ntchito zipangizo zosakaniza zometa ubweya wambiri, monga disperser high-speed, kotero kuti HEC ikhoza kubalalitsidwa mofanana mu nthawi yochepa ndikufika ku viscosity yofunikira.
3. Kulamulira kwa mlingo wa HEC
Muzitsulo zokhala ndi madzi, kuchuluka kwa HEC kuyenera kuyendetsedwa molingana ndi zosowa zenizeni za chophimba. Kuchulukitsitsa kwa HEC kumapangitsa kuti kukhuthala kwa maviscosity kukhala okwera kwambiri komanso kumakhudza magwiridwe antchito; HEC yaying'ono kwambiri siyingakwaniritse zomwe zikuyembekezeredwa. Muzochitika zachilendo, mlingo wa HEC umayendetsedwa pa 0.3% -1% ya chiwerengero chonse, ndipo gawo lapadera likhoza kusinthidwa kupyolera muzoyesera.
4. Kusamala kwa HEC mu zokutira madzi
Pewani ma agglomeration: HEC imakonda kusonkhana m'madzi, kotero powonjezera, yonjezerani pang'onopang'ono momwe mungathere, imwanitseni mofanana, ndipo pewani kusakanikirana kwa mpweya momwe mungathere.
Kutentha kwa kutentha: HEC imasungunuka mofulumira pa kutentha kwakukulu, koma kutentha sikuyenera kupitirira 50 ° C, mwinamwake kukhuthala kwake kungakhudzidwe.
Kukondoweza: Kugwedeza kosalekeza kumafunika panthawi ya kusungunuka kwa HEC, ndipo zitsulo zokhala ndi zivindikiro ziyenera kugwiritsidwa ntchito momwe zingathere kuti zisaipitsidwe ndi zonyansa zakunja ndi kutuluka kwa madzi.
Kusintha kwa pH mtengo: Kuthamanga kwa HEC kudzawonjezeka pansi pa zinthu za alkaline, kotero pH mtengo wa yankho uyenera kusinthidwa momveka bwino kuti ntchito yophimba isawonongeke chifukwa cha pH yochuluka.
Mayeso ofananira: Popanga mafomu atsopano, kugwiritsa ntchito HEC kuyenera kuyesedwa kuti igwirizane ndi zokhuthala, emulsifiers, ndi zina zotero kuti zitsimikizire kuti palibe zoyipa zomwe zingachitike.
5. Zitsanzo zogwiritsira ntchito HEC mu zokutira madzi
HEC ikhoza kugwiritsidwa ntchito ngati chowonjezera muzopaka zamkati zam'madzi zokhala ndi madzi komanso zokutira kunja kwamadzi. Mwachitsanzo:
Utoto wapakhoma wamkati wokhala ndi madzi: HEC imagwiritsidwa ntchito kukonza mawonekedwe a penti, kupangitsa kuti ntchito ikhale yosalala komanso yofananira, komanso kuchepetsa ma burashi.
Kupaka khoma lakunja kwamadzi: HEC imatha kukulitsa kukana kwamphamvu komanso kukana kwanyengo kwa zokutira ndikupewa kuwonongeka kwa filimu yopaka chifukwa cha kukokoloka kwa mvula.
Kugwiritsa ntchito HEC mu zokutira zokhala ndi madzi sikungangowonjezera ntchito yomanga ya zokutira, komanso kumapangitsanso maonekedwe ndi kulimba kwa filimu yophimba. Muzochita zogwiritsidwa ntchito, malingana ndi zofunikira zenizeni za zokutira, njira yowonongeka ndi kuchuluka kwa kuchuluka kwa HEC imasankhidwa moyenerera, ndipo kuphatikizapo kukonzekera kwa zipangizo zina zopangira, zotsatira zophimba zapamwamba zingatheke.
Nthawi yotumiza: Nov-10-2024