Pakupanga utoto, hydroxyethyl cellulose (HEC) ndi chowonjezera chowonjezera komanso chosinthira ma rheology chomwe chimatha kupititsa patsogolo kukhazikika kosungirako, kusanja ndi kupanga mapangidwe a utoto. Kuti muwonjezere hydroxyethyl cellulose ku utoto ndikuwonetsetsa kuti imagwira ntchito bwino, njira zina ndi zodzitetezera ziyenera kutsatiridwa. Njira yeniyeni ndi iyi:
1. Katundu wa hydroxyethyl cellulose
Ma cellulose a Hydroxyethyl ndi polima osasungunuka m'madzi omwe amasungunuka bwino m'madzi okhala ndi makulidwe abwino kwambiri, kupanga filimu, kusunga madzi, kuyimitsidwa ndi emulsifying katundu. Amagwiritsidwa ntchito kwambiri mu utoto wamadzi, zomatira, zoumba, inki ndi zinthu zina. Amapezedwa m'malo mwa magulu a hydroxyl pa cellulose cell chain ndi magulu a hydroxyethyl, motero amakhala ndi kusungunuka kwamadzi bwino.
Ntchito zazikulu za HEC mu utoto ndi:
Kukulitsa mphamvu: Wonjezerani kukhuthala kwa utoto, pezani utoto kuti usagwere, ndikupangitsa kuti ikhale yomanga bwino kwambiri.
Kuyimitsidwa kwamphamvu: Imatha kumwaza ndi kukhazikika tinthu tolimba monga ma pigment ndi ma fillers kuti zisakhazikike.
Kusungirako madzi: Limbikitsani kusungika kwa madzi mufilimu yokutira, onjezerani nthawi yotseguka, ndikuwongolera kunyowetsa kwa utoto.
Kuwongolera kwa Rheology: sinthani kuchuluka kwa madzi ndi kuyanika kwa zokutira, ndikuwongolera vuto la ma burashi pakumanga.
2. Masitepe owonjezera a hydroxyethyl cellulose
Sitepe yosungunula isanayambike Pakugwira ntchito kwenikweni, hydroxyethyl cellulose iyenera kumwaziridwa mofanana ndikusungunulidwa kudzera mu njira yosungunula isanakwane. Pofuna kuonetsetsa kuti cellulose imatha kugwira ntchito yake mokwanira, nthawi zambiri amalangizidwa kuti asungunuke m'madzi poyamba, m'malo mowonjezera mwachindunji ku zokutira. Njira zenizeni ndi izi:
Sankhani chosungunulira choyenera: nthawi zambiri madzi a deionized amagwiritsidwa ntchito ngati zosungunulira. Ngati pali zina zosungunulira organic mu ❖ kuyanika dongosolo, zinthu Kusungunuka ayenera kusintha malinga ndi katundu zosungunulira.
Wawani pang'onopang'ono hydroxyethyl cellulose: Pang'ono ndi pang'ono wani ufa wa hydroxyethyl cellulose uku mukusonkhezera madzi kuti asasakanike. Liwiro losonkhezera liyenera kukhala lochedwa kuti musachepetse kusungunuka kwa cellulose kapena kupanga "colloids" chifukwa cha kumeta ubweya wambiri.
Kusungunuka koyimirira: Mukawaza hydroxyethyl cellulose, imayenera kusiyidwa kuti iyime kwa nthawi (nthawi zambiri mphindi 30 mpaka maola angapo) kuonetsetsa kuti cellulose yatupa ndi kusungunuka m'madzi. Nthawi yosungunuka imadalira mtundu wa cellulose, kutentha kwa zosungunulira ndi mikhalidwe yolimbikitsa.
Sinthani kutentha kwa kutentha: Kuchulukitsa kutentha kumathandiza kufulumizitsa njira yosungunuka ya hydroxyethyl cellulose. Nthawi zambiri tikulimbikitsidwa kuwongolera kutentha kwa yankho pakati pa 20 ℃-40 ℃. Kutentha kwambiri kungayambitse kuwonongeka kwa cellulose kapena kuwonongeka kwa yankho.
Kusintha pH mtengo wa yankho Kusungunuka kwa hydroxyethyl cellulose kumagwirizana kwambiri ndi pH ya yankho. Nthawi zambiri amasungunuka bwino m'malo osalowerera kapena amchere pang'ono, okhala ndi pH yapakati pa 6-8. Pakusungunuka, pH mtengo ukhoza kusinthidwa ndikuwonjezera ammonia kapena zinthu zina zamchere ngati pakufunika.
Kuonjezera yankho la hydroxyethyl cellulose ku dongosolo lokutira Pambuyo pa kusungunuka, onjezerani yankho ku zokutira. Panthawi yowonjezera, iyenera kuwonjezeredwa pang'onopang'ono ndikugwedezeka mosalekeza kuti zitsimikizire kusakanikirana kokwanira ndi matrix opaka. Panthawi yosakaniza, m'pofunika kusankha liwiro loyendetsa bwino molingana ndi machitidwe osiyanasiyana kuti ateteze dongosolo kuti lisatuluke thovu kapena kuwonongeka kwa cellulose chifukwa cha mphamvu yometa ubweya wambiri.
Kusintha mamasukidwe akayendedwe Pambuyo kuwonjezera hydroxyethyl cellulose, mamasukidwe akayendedwe ❖ kuyanika akhoza kuwongoleredwa ndi kusintha kuchuluka anawonjezera. Nthawi zambiri, kuchuluka kwa cellulose ya hydroxyethyl yomwe imagwiritsidwa ntchito ndi pakati pa 0.3% -1.0% (poyerekeza ndi kulemera kwathunthu kwa zokutira), ndipo kuchuluka kwake komwe kumawonjezeredwa kumafunika kusinthidwa moyesera molingana ndi zofunikira za mapangidwe a zokutira. Kuchulukirachulukira kowonjezera kungapangitse kuti zokutira zikhale ndi kukhuthala kwakukulu komanso kusayenda bwino kwamadzi, zomwe zimakhudza ntchito yomanga; pamene kuwonjezera kosakwanira sikungathe kuchita nawo gawo la thickening ndi kuyimitsidwa.
Chitani mayeso okhazikika ndi kusunga kukhazikika Pambuyo powonjezera hydroxyethyl cellulose ndikusintha mawonekedwe okutira, ntchito yopangira zokutira iyenera kuyesedwa, kuphatikiza kusanja, sag, control brashi, etc. kuona sedimentation wa ❖ kuyanika atayima kwa nthawi, ndi mamasukidwe akayendedwe kusintha, etc., kupenda bata la hydroxyethyl mapadi.
3. Njira zodzitetezera
Pewani ma agglomeration: Pakusungunuka, hydroxyethyl cellulose ndi yosavuta kuyamwa madzi ndikutupa, motero imafunika kuwaza m'madzi pang'onopang'ono ndikuwonetsetsa kugwedezeka kokwanira kuti zisapangike. Uwu ndiye ulalo wofunikira pakugwira ntchito, apo ayi zitha kukhudza kuchuluka kwa kusungunuka ndi kufanana.
Pewani kumeta ubweya wambiri: Powonjezera ma cellulose, kuthamanga kwapang'onopang'ono sikuyenera kukhala kokwera kwambiri kuti musawononge unyolo wa cellulose chifukwa cha mphamvu yometa ubweya wambiri, zomwe zimapangitsa kuchepa kwa kukhuthala kwake. Kuphatikiza apo, pakupangira zokutira kotsatira, kugwiritsa ntchito zida zometa ubweya wambiri kuyeneranso kupewedwa momwe zingathere.
Yang'anirani kutentha kwa kutentha: Mukasungunula hydroxyethyl cellulose, kutentha kwamadzi sikuyenera kukhala kokwera kwambiri. Nthawi zambiri tikulimbikitsidwa kuwongolera pa 20 ℃-40 ℃. Pansi pa kutentha kwambiri, mapadi amatha kunyozeka, zomwe zimapangitsa kuchepa kwa kukhuthala kwake komanso kukhuthala kwake.
Kusungirako yankho: Mayankho a Hydroxyethyl cellulose nthawi zambiri amafunika kukonzedwa ndikugwiritsidwa ntchito nthawi yomweyo. Kusungidwa kwa nthawi yayitali kudzakhudza kukhuthala kwake ndi kukhazikika kwake. Nthawi zambiri amalangizidwa kukonzekera yankho lofunikira pa tsiku la kupanga utoto kuti likhalebe labwino kwambiri.
Kuphatikizika kwa cellulose ya hydroxyethyl ku utoto sikuti ndi njira yosavuta yosakanikirana ndi thupi, komanso kuyenera kuphatikizidwa ndi zofunikira zenizeni za ndondomekoyi ndi ndondomeko zoyendetsera ntchito kuti zitsimikizire kuti makulidwe ake, kuyimitsidwa ndi kusunga madzi kumagwiritsidwa ntchito mokwanira. Panthawi yowonjezeretsa, tcherani khutu ku sitepe yowonongeka isanayambe, kulamulira kutentha kwa kutentha ndi pH mtengo, ndi kusakaniza kwathunthu pambuyo powonjezera. Zambirizi zidzakhudza mwachindunji ubwino ndi kukhazikika kwa ntchito ya utoto.
Nthawi yotumiza: Sep-19-2024