Mu mapangidwe a utoto, hydroxyethyl cellulose (HEC) ndi chinthu chodziwika bwino chowonjezera kukhuthala ndi kusintha kwa rheology chomwe chingathandize kukhazikika, kusinthasintha, ndi kapangidwe ka utoto. Kuti muwonjezere hydroxyethyl cellulose ku utoto ndikuwonetsetsa kuti ukugwira ntchito bwino, njira zina ndi zodzitetezera ziyenera kutsatiridwa. Njira yeniyeni ndi iyi:
1. Katundu wa hydroxyethyl cellulose
Hydroxyethyl cellulose ndi polima yosasungunuka m'madzi yomwe siimayambitsa ionic yokhala ndi mphamvu zabwino kwambiri zokhuthala, kupanga filimu, kusunga madzi, kuyimitsa ndi kusakaniza. Imagwiritsidwa ntchito kwambiri mu utoto wopangidwa ndi madzi, zomatira, zoumba, inki ndi zinthu zina. Imapezeka posintha magulu ena a hydroxyl pa unyolo wa maselo a cellulose ndi magulu a hydroxyethyl, kotero imakhala ndi madzi okwanira.
Ntchito zazikulu za HEC mu utoto ndi izi:
Kukhuthala: Kuonjezera kukhuthala kwa utoto, kuletsa utoto kuti usagwe, ndikupangitsa kuti ukhale ndi mawonekedwe abwino kwambiri.
Mphamvu yoyimitsidwa: Imatha kufalikira ndikukhazikitsa tinthu tolimba monga utoto ndi zodzaza kuti zisakhazikike.
Kusunga madzi: Kumawonjezera kusunga madzi mu filimu yophimba, kukulitsa nthawi yotseguka, ndikuwonjezera mphamvu ya utoto yonyowetsa.
Kuwongolera rheology: sinthani kusinthasintha ndi kusinthasintha kwa chophimbacho, ndikukonza vuto la chizindikiro cha burashi panthawi yomanga.
2. Njira zowonjezera za hydroxyethyl cellulose
Gawo Loyamba Kusungunuka Mu ntchito yeniyeni, hydroxyethyl cellulose iyenera kufalikira mofanana ndikusungunuka panthawi yomaliza kusungunuka. Pofuna kuonetsetsa kuti cellulose ikugwira ntchito mokwanira, nthawi zambiri amalimbikitsidwa kuti asungunuke kaye m'madzi, m'malo mowonjezera mwachindunji ku chophimbacho. Masitepe enieni ndi awa:
Sankhani chosungunulira choyenera: nthawi zambiri madzi osasungunuka amagwiritsidwa ntchito ngati chosungunulira. Ngati pali zosungunulira zina zachilengedwe mu dongosolo lopaka utoto, mikhalidwe yosungunuka iyenera kusinthidwa malinga ndi momwe chosungunuliracho chilili.
Pang'onopang'ono thirani hydroxyethyl cellulose: Pang'onopang'ono komanso mofanana thirani ufa wa hydroxyethyl cellulose pamene mukusakaniza madzi kuti madzi asagwirizane. Liwiro loyambitsa liyenera kukhala lochedwa kuti lipewe kuchepetsa kusungunuka kwa cellulose kapena kupanga "colloids" chifukwa cha mphamvu yochuluka yodula.
Kusungunuka koyima: Mukathira hydroxyethyl cellulose, iyenera kusiyidwa kuti iime kwa nthawi ndithu (nthawi zambiri mphindi 30 mpaka maola angapo) kuti muwonetsetse kuti cellulose yatupa kwathunthu ndikusungunuka m'madzi. Nthawi yosungunuka imadalira mtundu wa cellulose, kutentha kwa solvent ndi momwe imagwirira ntchito.
Sinthani kutentha kwa kusungunuka: Kuonjezera kutentha kumathandiza kuti njira yosungunula ya hydroxyethyl cellulose ifulumizike. Nthawi zambiri kumalimbikitsidwa kuwongolera kutentha kwa yankho pakati pa 20℃ -40℃. Kutentha kwambiri kungayambitse kuwonongeka kwa cellulose kapena kuwonongeka kwa yankho.
Kusintha pH ya yankho Kusungunuka kwa hydroxyethyl cellulose kumagwirizana kwambiri ndi pH ya yankho. Nthawi zambiri imasungunuka bwino pansi pa mikhalidwe yopanda tsankho kapena ya alkaline pang'ono, yokhala ndi pH pakati pa 6-8. Panthawi yosungunuka, pH imatha kusinthidwa powonjezera ammonia kapena zinthu zina za alkaline ngati pakufunika.
Kuonjezera yankho la hydroxyethyl cellulose ku dongosolo lophimba Mukasungunuka, onjezerani yankho ku chophimbacho. Pakuwonjezera, liyenera kuwonjezeredwa pang'onopang'ono ndikusunthidwa mosalekeza kuti muwonetsetse kuti likusakanikirana mokwanira ndi matrix yophimba. Pakusakaniza, ndikofunikira kusankha liwiro loyenera losakaniza malinga ndi machitidwe osiyanasiyana kuti dongosololi lisawonongeke ndi thovu kapena cellulose chifukwa cha mphamvu yochuluka yodula.
Kusintha kukhuthala Mukawonjezera hydroxyethyl cellulose, kukhuthala kwa chophimbacho kumatha kulamulidwa mwa kusintha kuchuluka komwe kwawonjezeredwa. Kawirikawiri, kuchuluka kwa hydroxyethyl cellulose yomwe imagwiritsidwa ntchito ndi pakati pa 0.3%-1.0% (poyerekeza ndi kulemera konse kwa chophimbacho), ndipo kuchuluka komwe kwawonjezeredwa kuyenera kusinthidwa moyesera malinga ndi zofunikira za kapangidwe ka chophimbacho. Kuchulukitsa kwambiri kungayambitse chophimbacho kukhala ndi kukhuthala kwakukulu komanso kusayenda bwino kwa madzi, zomwe zimakhudza magwiridwe antchito omanga; pomwe kuwonjezera kosakwanira sikungathe kuchita gawo la kukhuthala ndi kuyimitsidwa.
Chitani mayeso okhazikika pa kukhazikika ndi kusungirako. Mukawonjezera hydroxyethyl cellulose ndikusintha njira yophikira, magwiridwe antchito a kapangidwe ka chophimbacho ayenera kuyesedwa, kuphatikizapo kukhazikika, kutsika, kuwongolera chizindikiro cha burashi, ndi zina zotero. Nthawi yomweyo, mayeso okhazikika pa kusungirako chophimbacho amafunikanso kuti muwone kukhazikika kwa chophimbacho pambuyo poyima kwa nthawi yayitali, kusintha kwa viscosity, ndi zina zotero, kuti muwone kukhazikika kwa hydroxyethyl cellulose.
3. Zodzitetezera
Pewani kusonkhana: Panthawi yosungunuka, hydroxyethyl cellulose ndi yosavuta kuyamwa madzi ndi kutupa, choncho iyenera kulowetsedwa m'madzi pang'onopang'ono ndikuonetsetsa kuti ikusakanikirana mokwanira kuti ipewe mapangidwe a ziphuphu. Ichi ndi chinthu chofunikira kwambiri pakugwira ntchito, apo ayi zingakhudze kuchuluka kwa kusungunuka ndi kufanana.
Pewani mphamvu yodula kwambiri: Mukawonjezera cellulose, liwiro loyambitsa siliyenera kukhala lalikulu kwambiri kuti lisawononge unyolo wa maselo a cellulose chifukwa cha mphamvu yodula kwambiri, zomwe zimapangitsa kuti ntchito yake yokhuthala ichepe. Kuphatikiza apo, popanga zokutira pambuyo pake, kugwiritsa ntchito zida zodula kwambiri kuyeneranso kupewedwa momwe zingathere.
Yang'anirani kutentha kwa kusungunuka: Mukasungunula hydroxyethyl cellulose, kutentha kwa madzi sikuyenera kukhala kwakukulu kwambiri. Nthawi zambiri amalangizidwa kuti ayang'anire pa 20℃-40℃. Pa kutentha kwambiri, cellulose ikhoza kuchepa, zomwe zimapangitsa kuti kukhuthala kwake kuchepe komanso kukhuthala kwake kuchepe.
Kusunga yankho: Mayankho a hydroxyethyl cellulose nthawi zambiri amafunika kukonzedwa ndikugwiritsidwa ntchito nthawi yomweyo. Kusunga kwa nthawi yayitali kumakhudza kukhuthala kwake ndi kukhazikika kwake. Nthawi zambiri amalimbikitsidwa kukonzekera yankho lofunikira patsiku lopangira utoto kuti lipitirize kugwira ntchito bwino.
Kuwonjezera hydroxyethyl cellulose mu utoto si njira yosavuta yosakaniza thupi, komanso kuyenera kuphatikizidwa ndi zofunikira zenizeni za njira ndi zofunikira zogwirira ntchito kuti zitsimikizire kuti makulidwe ake, kuyimitsidwa ndi kusunga madzi zikugwiritsidwa ntchito mokwanira. Pa nthawi yowonjezera, samalani ndi gawo loyambirira kusungunuka, kuwongolera kutentha kwa kusungunuka ndi pH, komanso kusakaniza kwathunthu pambuyo powonjezera. Zambirizi zidzakhudza mwachindunji ubwino ndi kukhazikika kwa ntchito ya utoto.
Nthawi yotumizira: Sep-19-2024