Dispersing hydroxyethyl cellulose (HEC) ndi opareshoni yomwe imafuna njira zenizeni zomwe ziyenera kutsatiridwa, makamaka pama media amadzi. Njira zolondola za kubalalitsidwa ndi kusungunuka zitha kutsimikizira kugwiritsidwa ntchito kwake. Ma cellulose a Hydroxyethyl amagwiritsidwa ntchito kwambiri popaka, zomatira, zodzoladzola, minda yamafuta ndi madera ena chifukwa cha kukhuthala, kukhazikika, kupanga mafilimu, kunyowetsa ndi ntchito zina.
Chiyambi cha Hydroxyethyl Cellulose
Hydroxyethyl cellulose ndi ether yosungunuka m'madzi yopanda ionic cellulose yopangidwa ndi kusintha kwa mankhwala a cellulose achilengedwe. Ili ndi kusungunuka kwabwino kwambiri komanso kukhuthala, ndipo imatha kupanga njira yowonekera, yowoneka bwino yamadzi. HEC ilinso ndi kulolerana kwabwino kwa madzi amchere, kotero ndiyoyenera makamaka kumadera amadzi am'nyanja kapena machitidwe okhala ndi mchere. Panthawi imodzimodziyo, imatha kukhala yokhazikika pamtunda wambiri wa pH ndipo sichikhudzidwa ndi malo a asidi ndi alkali.
Kubalalika mfundo ya hydroxyethyl cellulose
M'madzi, kubalalitsidwa kwa hydroxyethyl cellulose kumaphatikizapo njira ziwiri zazikulu: kubalalitsidwa konyowa ndi kusungunuka kwathunthu.
Kubalalika konyowa: Iyi ndi njira yopangira tinthu tating'ono ta hydroxyethyl cellulose kuti tigawidwe m'madzi. Ngati HEC imawonjezedwa mwachindunji kumadzi, imamwa madzi mwachangu ndikupanga zomata pamwamba, zomwe zimalepheretsa kusungunuka kwina. Choncho, panthawi ya kubalalitsidwa, kupanga mapangidwe otere ayenera kupewedwa momwe angathere.
Kusungunuka kwathunthu: Pambuyo pakunyowetsa, mamolekyu a cellulose amafalikira pang'onopang'ono m'madzi kuti apange njira yofanana. Nthawi zambiri, HEC imasungunuka pang'onopang'ono ndipo imatha kutenga maola angapo kapena kupitilira apo, kutengera kutentha kwa madzi, mikhalidwe yolimbikitsa komanso kukula kwa tinthu ta cellulose.
Njira zobalalika za hydroxyethyl cellulose
Kuwonetsetsa kuti cellulose ya hydroxyethyl imatha kumwazikana mofanana, zotsatirazi ndizomwe zimagwiritsidwa ntchito mobalalika:
1. Sankhani kutentha kwamadzi koyenera
Kutentha kwa madzi ndi chinthu chofunikira chomwe chimakhudza kubalalitsidwa ndi kusungunuka kwa cellulose ya hydroxyethyl. Nthawi zambiri, madzi ozizira kapena kutentha kwa chipinda ndi malo oyenera kwambiri osungunuka. Madzi ofunda (pafupifupi 30-40 ° C) amathandizira kusungunuka, koma kutentha kwamadzi kwambiri (kupitirira 50 ° C) kungapangitse kuti ma clumps apangidwe panthawi ya kusungunuka, zomwe zidzakhudza kufalikira.
2. Pre-kunyowetsa mankhwala
Ma cellulose a Hydroxyethyl amakonda kupanga zing'onozing'ono mwachangu m'madzi, kotero kuti kunyowetsa kusanachitike ndi njira yabwino yobalalitsira. Poyamba kusakaniza HEC ndi madzi osungunula organic zosungunulira (monga ethanol, propylene glycol, etc.), HEC ndi uniformly yonyowa kuti asatengere madzi mwachindunji ndi kupanga zotupa. Njira imeneyi akhoza kwambiri kusintha wotsatira kubalalitsidwa dzuwa.
3. Kuwongolera liwiro lowonjezera
Mukamwaza cellulose ya hydroxyethyl, ufa uyenera kutsanuliridwa m'madzi pang'onopang'ono komanso mofanana ndikuyambitsa. Liwiro la chosonkhezera lisakhale lokwera kwambiri kuti lisatuluke thovu kwambiri. Ngati liwiro lowonjezera liri lofulumira kwambiri, HEC ikhoza kusabalalika kwathunthu, kupanga ma micelles osagwirizana, omwe angakhudze ndondomeko yowonongeka.
4. Kukondoweza
Kugwedeza ndi chimodzi mwazinthu zofunika kwambiri pakubalalitsa. Ndibwino kuti mugwiritse ntchito chotsitsimutsa chochepa kwambiri kuti mugwedeze mosalekeza kuti hydroxyethyl cellulose igawidwe mofanana mumadzimadzi. Kuthamanga kwambiri kungayambitse HEC kugwirizanitsa, kuonjezera nthawi yowonongeka, ndikupanga thovu, zomwe zimakhudza kuwonekera kwa yankho. Nthawi zambiri, nthawi yogwedeza iyenera kuyendetsedwa pakati pa mphindi 30 ndi maola angapo, malingana ndi zipangizo zomwe zimagwiritsidwa ntchito komanso kutentha kwa madzi.
5. Onjezani ma electrolyte kapena kusintha pH
Nthawi zina, kusungunuka kwa hydroxyethyl cellulose kumatha kufulumizitsa powonjezera ma electrolyte oyenera (monga mchere) kapena kusintha pH mtengo. Njirayi ndi yoyenera makamaka kwa mapulogalamu omwe ali ndi zofunika kwambiri pa liwiro la kusungunuka. Komabe, kuchuluka kwa electrolyte kapena pH kumafunika kusinthidwa mosamala kuti zisakhudze ntchito ya HEC.
Mavuto Wamba ndi Zotsutsana nazo
Agglomeration: Vuto lofala kwambiri la HEC ndi kuphatikizika panthawi ya kusungunuka, komwe kumabweretsa kuwonongeka kosakwanira. Kuti mupewe izi, mungagwiritse ntchito njira yowotchera isanayambe kapena kusakaniza HEC ndi zinthu zina za ufa (monga fillers, pigments, etc.) ndikuwonjezera kumadzi.
Kusungunuka kwapang'onopang'ono: Ngati kuchuluka kwa kusungunuka kukuchedwa, mutha kufulumizitsa kusungunuka mwa kuwonjezera mphamvu yokoka kapena moyenerera kuwonjezera kutentha kwa madzi. Panthawi imodzimodziyo, mukhoza kuyesanso kugwiritsa ntchito nthawi yomweyo HEC, yomwe yakhala ikugwiritsidwa ntchito mwapadera kuti isungunuke mwamsanga mu nthawi yochepa.
Vuto la bubble: Matuvu amapangidwa mosavuta panthawi yogwedezeka, zomwe zimakhudza kuwonekera komanso kukhuthala kwa yankho. Pankhaniyi, kuchepetsa yogwira mtima liwiro kapena kuwonjezera mlingo woyenera wa defoaming wothandizira angathe kuchepetsa mapangidwe thovu.
Njira zodzitetezera ku hydroxyethyl cellulose
Muzogwiritsira ntchito, mtundu woyenera ndi njira yowonjezera ya hydroxyethyl cellulose iyenera kusankhidwa malinga ndi zofunikira za machitidwe osiyanasiyana. Mwachitsanzo, m'makampani opangira zokutira, hydroxyethyl cellulose sikuti imagwiritsidwa ntchito ngati thickener, komanso imatha kupititsa patsogolo ma rheology, kupanga filimu ndikusunga kukhazikika kwa zokutira. M'makampani opangira mafuta, kukana kwa mchere wa HEC ndikofunikira kwambiri, chifukwa chake kusankha kuyenera kusinthidwa malinga ndi momwe zilili pansi.
Dispersing hydroxyethyl cellulose ndi ntchito mwaukadaulo kwambiri, ndipo ndikofunikira kusankha njira yoyenera kubalalitsidwa molingana ndi zochitika zosiyanasiyana zogwiritsira ntchito. Poyang'anira kutentha kwa madzi, kunyowetsa koyenera, kusonkhezera koyenera ndi kuwonjezera zowonjezera zowonjezera, zingathe kuonetsetsa kuti hydroxyethyl cellulose imamwazika mofanana ndikusungunuka kwathunthu m'madzi, potero kukulitsa ntchito zake zolimba ndi zokhazikika.
Nthawi yotumiza: Oct-23-2024