Mukugadzirwa kwependi, hydroxyethyl cellulose (HEC) chinhu chinowanzo shandiswa mukuwedzera kukora uye rheology chinogona kuvandudza kugadzikana kwekuchengetedza, kuenzana uye hunhu hwekuvaka hwependi. Kuti uwedzere hydroxyethyl cellulose mumapendi uye uve nechokwadi chekuti inoshanda nemazvo, matanho akati wandei uye matanho ekudzivirira anofanirwa kuteverwa. Maitiro acho ndeaya anotevera:
1. Hunhu hwehydroxyethyl cellulose
Hydroxyethyl cellulose ipolymer isinganyungudike mumvura ine hunhu hwakanaka hwekukora, kugadzira firimu, kuchengetedza mvura, kumisa uye emulsifying. Inowanzoshandiswa mumapendi akavakirwa mumvura, manamati, zviumbwa zveceramic, inki nezvimwe zvigadzirwa. Inowanikwa nekutsiva chikamu chemapoka ehydroxyl pa cellulose molecular chain nemapoka ehydroxyethyl, saka ine mvura inonyungudika zvakanaka.
Mabasa makuru eHEC mumapendi ndeaya:
Kukosha kwependi: Wedzera kukora kwependi, kudzivirira kuti pendi isatsvedzerere, uye kuita kuti ive nehunhu hwakanaka hwekuvaka.
Mhedzisiro yekumisikidzwa: Inogona kupararira zvakaenzana uye kudzikamisa zvidimbu zvakasimba zvakaita semapigment nefillers kuti zvisagadzikane.
Kuchengetedza mvura: Kuvandudza kuchengetedza mvura kwefirimu rekuputira, kuwedzera nguva yekuvhurika, uye kuvandudza kunyorova kwependi.
Kudzora rheology: gadzirisa kuyerera uye kuenzana kwependi, uye gadzirisa dambudziko remabhurashi panguva yekuvaka.
2. Matanho ekuwedzera ehydroxyethyl cellulose
Danho rekutanga kunyungudika. Mukushanda chaiko, hydroxyethyl cellulose inofanira kupararira zvakaenzana uye kunyungudika kuburikidza nemaitiro ekutanga kunyungudika. Kuti ive nechokwadi chekuti cellulose inogona kuita basa rayo zvizere, zvinokurudzirwa kuti uinyungudike mumvura kutanga, pane kuiisa zvakananga pajira. Matanho chaiwo ndeaya anotevera:
Sarudza chinonyungudutsa chakakodzera: kazhinji mvura isina ion inoshandiswa sechinyungudutsa. Kana paine zvimwe zvinonyungudutsa zveorganic mu coating system, mamiriro ekunyunguduka anofanira kugadziriswa zvichienderana nehunhu hwechinyungudutsa.
Sasai zvishoma nezvishoma hydroxyethyl cellulose: Sasai zvishoma nezvishoma uye zvakaenzana hydroxyethyl cellulose powder muchikurunga mvura kudzivirira kusangana kwemvura. Kumhanya kwekukurunga kunofanira kunonoka kudzivirira kudzikira kwekunyungudika kwecellulose kana kugadzira "colloids" nekuda kwesimba rakawandisa rekuchekwa kwemvura.
Kunyungudika kwakamira: Mushure mekusaswa hydroxyethyl cellulose, inofanira kusiiwa kuti imire kwenguva yakati (kazhinji maminetsi makumi matatu kusvika maawa akati wandei) kuti ive nechokwadi chekuti cellulose yazvimba zvachose uye yanyungudika mumvura. Nguva yekunyungudika inoenderana nerudzi rwecellulose, tembiricha yekunyungudika uye mamiriro ekukurunga.
Gadzirisa tembiricha yekunyungudika: Kuwedzera tembiricha kunobatsira kukurumidzisa kunyungudika kwehydroxyethyl cellulose. Kazhinji zvinokurudzirwa kudzora tembiricha yemushonga uri pakati pe20℃ -40℃. Tembiricha yakakwira inogona kukonzera kuparara kwecellulose kana kuparara kwemushonga.
Kugadzirisa pH yemushonga Kunyungudika kwehydroxyethyl cellulose kwakabatana zvakanyanya ne pH yemushonga. Kazhinji inonyungudika zviri nani mumamiriro ezvinhu asina kusimba kana kuti ane alkaline zvishoma, ine pH iri pakati pe6-8. Munguva yekunyungudika, pH inogona kugadziriswa nekuwedzera ammonia kana zvimwe zvinhu zvine alkaline sezvinodiwa.
Kuisa hydroxyethyl cellulose solution mu coating system Mushure mekunyungudika, wedzera solution mu coating. Munguva yekuwedzera, inofanira kuwedzerwa zvishoma nezvishoma uye ichikurunga nguva dzose kuti ive nechokwadi chekusanganiswa kwakakwana ne coating matrix. Munguva yekusanganisa, zvakakosha kusarudza kumhanya kwakakodzera kwe stimu zvichienderana nema system akasiyana kudzivirira system kubva mukuputsika kwe furo kana cellulose nekuda kwesimba rakawandisa re shear.
Kugadzirisa viscosity Mushure mekuwedzera hydroxyethyl cellulose, viscosity yependi inogona kudzorwa nekugadzirisa huwandu hwakawedzerwa. Kazhinji, huwandu hwehydroxyethyl cellulose inoshandiswa huri pakati pe0.3%-1.0% (zvichienderana nehuremu hwese hwependi), uye huwandu hwakawedzerwa hunofanirwa kugadziriswa nekuyedza zvichienderana nezvinodiwa zvependi. Kuwedzera kwakanyanya kunogona kukonzera kuti pendi ive ne viscosity yakawandisa uye kusashanda zvakanaka, zvichikanganisa mashandiro ekuvaka; nepo kuwedzera kusina kukwana kungasakwanisa kuita basa rekukora uye kumisa.
Ita bvunzo dzekuyera nekugadzikana kwekuchengetedza Mushure mekuwedzera hydroxyethyl cellulose nekugadzirisa fomura yekumonera, mashandiro ekuvaka kwepende anofanira kuyedzwa, kusanganisira kuyera, kudzika, kudzora brashi mark, nezvimwewo. Panguva imwe chete, bvunzo yekuyera kugadzikana kwependera inofanirwawo kuona kusvibiswa kwependera mushure mekumira kwenguva yakati, kuchinja kwe viscosity, nezvimwewo, kuti uongorore kugadzikana kwe hydroxyethyl cellulose.
3. Kungwarira
Dzivisa kuungana: Munguva yekunyungudika, hydroxyethyl cellulose iri nyore kunyudza mvura nekuzvimba, saka inofanira kusaswa mumvura zvishoma nezvishoma uye kuve nechokwadi chekuti yakakurungwa zvakakwana kudzivirira kuumbwa kwemapundu. Ichi chinhu chakakosha pakushanda, zvikasadaro zvinogona kukanganisa mwero wekunyungudika uye kufanana.
Dzivisa simba guru rekuchekerera: Paunenge uchiisa cellulose, kumhanya kwekukurunga hakufanirwe kunge kwakanyanya kudzivirira kukuvadza cellulose molecular chain nekuda kwesimba guru rekuchekerera, zvichikonzera kudzikira kwekushanda kwayo kwekukora. Pamusoro pezvo, mukugadzirwa kwependi kunotevera, kushandiswa kwemidziyo yakawanda yekuchekerera kunofanirawo kudzivirirwa zvakanyanya sezvinobvira.
Dzora tembiricha yekunyungudika: Pakunyungudutsa hydroxyethyl cellulose, tembiricha yemvura haifanirwe kunge yakanyanya kukwira. Kazhinji zvinokurudzirwa kuidzora pa20℃-40℃. Kana tembiricha yakakwira, cellulose inogona kuora, zvichikonzera kudzikira kwekukora kwayo uye viscosity.
Kuchengetedza mhinduro: Mhinduro dzeHydroxyethyl cellulose dzinofanira kugadzirwa uye kushandiswa nekukasika. Kuchengetedza kwenguva refu kunokanganisa kunaka kwayo uye kugadzikana kwayo. Kazhinji zvinokurudzirwa kugadzirira mhinduro inodiwa pazuva rekugadzirwa kwependi kuti irambe ichishanda zvakanaka.
Kuwedzerwa kwehydroxyethyl cellulose papendi hakusi kungosanganisa zvinhu zviri nyore chete, asiwo kunofanira kubatanidzwa nezvinodiwa chaizvo pakuita uye zvinodiwa pakushanda kwayo kuti ive nechokwadi chekuti kukora kwayo, kumisa uye kuchengetedza mvura zvashandiswa zvizere. Munguva yekuwedzera, teerera danho rekutanga kunyungudika, kudzora tembiricha yekunyungudika uye pH kukosha, uye kusanganisa kwakazara mushure mekuwedzera. Izvi zvichakanganisa zvakananga kunaka uye kugadzikana kwekushanda kwependi.
Nguva yekutumira: Gunyana-19-2024