Dispersing hydroxyethyl cellulose (HEC) kuvhiya kunoda matanho chaiwo anofanirwa kutevedzwa, kunyanya mumidhiya ine mvura. Iyo chaiyo yekuparadzira uye yekumisa matanho anogona kuve nechokwadi chekushandisa kwayo. Hydroxyethyl cellulose inoshandiswa zvakanyanya mumachira, zvinonamira, zvizorwa, minda yemafuta nemimwe minda nekuda kwekukora, kudzikamisa, kugadzira firimu, kunyorova uye mamwe mabasa.
Nhanganyaya yeHydroxyethyl Cellulose
Hydroxyethyl cellulose inonyungudika isina-ionic cellulose ether inonyungudika nemvura yakagadzirwa nekemikari inonatsiridzwa yeyakasikwa cellulose. Iyo ine yakanakisa solubility uye thickening mhedzisiro, uye inogona kugadzira yakajeka, viscous aqueous mhinduro. HEC inewo yakanakisa kushivirira kwemvura yemunyu, saka inonyanya kukodzera nzvimbo dzemvura yegungwa kana masisitimu ane munyu. Panguva imwecheteyo, inogona kuramba yakagadzikana pamusoro pehupamhi pH renji uye haina kukanganiswa neasidhi uye alkali nharaunda.
Dispersion musimboti wehydroxyethyl cellulose
Mumvura, nzira yekuparadzira yehydroxyethyl cellulose inosanganisira matanho maviri makuru: kupararira kwemvura uye kupera kwakakwana.
Wet dispersion: Iyi ndiyo nzira yekugadzira hydroxyethyl cellulose particles yakagovaniswa mumvura. Kana HEC yakawedzerwa yakananga kumvura, inotora mvura nekukurumidza uye inogadzira zvinyoro zvinonamira pamusoro, izvo zvinotadzisa kumwe kupera. Nokudaro, panguva yekupararira, kuumbwa kwezviputi zvakadaro kunofanira kudzivirirwa zvakanyanya sezvinobvira.
Kunyungudika kwakazara: Mushure mekunyorova, mamorekuru e cellulose anopararira zvishoma nezvishoma mumvura kuti agadzire mhinduro yakafanana. Kazhinji, HEC inonyungudika zvishoma nezvishoma uye inogona kutora maawa akati wandei kana kunyange kureba, zvichienderana nekupisa kwemvura, kukonzeresa mamiriro uye cellulose particle size.
Matanho ekuparadzira ehydroxyethyl cellulose
Kuve nechokwadi chekuti hydroxyethyl cellulose inogona kuparadzirwa zvakaenzana, zvinotevera zvinowanzoshandiswa matanho ekuparadzira:
1. Sarudza tembiricha yakakodzera yemvura
Tembiricha yemvura chinhu chakakosha chinokanganisa kupararira uye kuparara kwehydroxyethyl cellulose. Kazhinji kutaura, mvura inotonhora kana tembiricha yekamuri mvura ndiyo inonyanya kukodzera kunyungudika nharaunda. Mvura inodziya (inenge 30-40 ° C) inobatsira kukurumidzira kuparara, asi yakanyanyisa kupisa kwemvura (inopfuura 50 ° C) inogona kuita kuti zviputi zviumbe panguva yekuparara, izvo zvinokanganisa kupararira.
2. Pre-wetting treatment
Hydroxyethyl cellulose inoita kuti igadzire masumbu nekukurumidza mumvura, saka pre-wetting kurapwa inzira inoshanda yekuparadzira. Nokutanga kusanganisa HEC nemvura-soluble organic solvent (yakadai se ethanol, propylene glycol, etc.), HEC inonyoroveswa zvakafanana kuti idzivirire kubva pamvura yakananga uye kugadzira mapundu. Iyi nzira inogona kuvandudza zvakanyanya kunotevera kuparadzira kugona.
3. Dzora kukurumidza kwekuwedzera
Pakuparadzira hydroxyethyl cellulose, hupfu hunofanira kudirwa mumvura zvishoma nezvishoma uye zvakaenzana uchikurudzira. Sipidhi yechibatiso haifanire kunge yakakwira zvakanyanya kudzivirira kupupa kwakanyanyisa. Kana iyo yekuwedzera kukurumidza inokurumidza, HEC inogona kunge isinganyatso kupararira, ichigadzira micelles isina kuenzana, iyo inozokanganisa iyo inotevera kuparara kwekuita.
4. Kukurudzira
Kubvongodza nderimwe rematanho akakosha mukuparadzira. Zvinokurudzirwa kushandisa yakaderera-speed stirrer kumutsa nguva dzose kuti ive nechokwadi chekuti hydroxyethyl cellulose inogona kugovaniswa zvakaenzana mukati memvura system. Kumhanyisa-kumhanya kwakanyanya kunogona kuita kuti HEC iunganidze, iwedzere nguva yekunyungudika, uye igadzire mabhubhu, zvichikanganisa kujeka kwemhinduro. Kazhinji, nguva yekukurudzira inofanira kudzorwa pakati pemaminitsi makumi matatu nemaawa akawanda, zvichienderana nemidziyo inoshandiswa uye kupisa kwemvura.
5. Wedzera electrolytes kana kugadzirisa pH
Dzimwe nguva, nzira yekunyungudutsa yehydroxyethyl cellulose inogona kukwidziridzwa nekuwedzera huwandu hwakakodzera hwema electrolytes (semunyu) kana kugadzirisa pH kukosha. Iyi nzira inonyanya kukodzera kune zvikumbiro zvine zvakakwirira zvinodiwa pakuparara kwekukurumidza. Zvisinei, huwandu hwe electrolyte kana pH inoda kunyatsogadziriswa kuti irege kukanganisa kushanda kweHEC.
Matambudziko Akajairwa uye Countermeasures
Agglomeration: Dambudziko rinowanzozivikanwa reHEC nderekusangana panguva yekuparara, izvo zvinotungamira mukuparara kusina kukwana. Kuti udzivise izvi, unogona kushandisa pre-wetting nzira kana kusanganisa HEC nezvimwe zvinhu zveupfu (zvakadai semafiritsi, pigments, nezvimwewo) wozowedzera kumvura.
Slow dissolution rate: Kana iyo disolution rate ichinonoka, unogona kukurumidzira kunyungudika nekuwedzera iyo inosimudzira inoshanda kana zvakakodzera kuwedzera tembiricha yemvura. Panguva imwecheteyo, iwe unogona zvakare kuedza kushandisa pakarepo HEC, iyo yakanyatsogadziriswa kuti iparadze nekukurumidza munguva pfupi.
Dambudziko reBubble: Mabhuru anogadzirwa zviri nyore panguva yekusimudzira, zvichikanganisa kujeka uye viscosity kuyerwa kwemhinduro. Muchiitiko ichi, kuderedza kumhanyisa kumhanyisa kana kuwedzera huwandu hwakakodzera hwekubvisa furo mumiriri kunogona kunyatso kudzikisa kuumbwa kwemabhuru.
Maitiro ekuchengetedza ehydroxyethyl cellulose
Mumashandisirwo anoshanda, iyo yakakodzera mhando uye nzira yekuwedzera yehydroxyethyl cellulose inofanirwa kusarudzwa zvinoenderana nezvinodiwa zveakasiyana masisitimu. Semuenzaniso, muindasitiri yekupfekedza, hydroxyethyl cellulose haingoshandiswi seyakakora chete, asiwo inogona kuvandudza rheology, kugadzira firimu uye kugadzikana kwekuchengetedza kwejasi. Muindasitiri yemafuta, kuramba kwemunyu kweHEC kwakakosha, saka kusarudzwa kunoda kugadziridzwa zvinoenderana nemamiriro epasi.
Kuparadzira hydroxyethyl cellulose ibasa rehunyanzvi, uye zvinodikanwa kusarudza nzira yakakodzera yekuparadzira zvinoenderana nemamiriro akasiyana ekushandisa. Nekudzora tembiricha yemvura, pre-wetting, inonzwisisika inomutsa uye nekuwedzera zvakakodzera, inogona kuve nechokwadi chekuti hydroxyethyl cellulose yakaparadzirwa zvakaenzana uye yakanyungudika zvachose mumvura, nekudaro ichiwedzera kukora uye kudzikamisa mabasa.
Nguva yekutumira: Oct-23-2024