Mukugadzirwa kwependi, hydroxyethyl cellulose (HEC) yakajairika thickener uye rheology modifier inogona kuvandudza kugadzikana kwekuchengetedza, kuyera uye kuvaka zvivakwa zvependi. Kuti uwedzere hydroxyethyl cellulose kupendi uye kuve nechokwadi kuti inoshanda nemazvo, mamwe matanho nekuchengetedza zvinoda kuteverwa. Iyo chaiyo process ndeiyi inotevera:
1. Zvinhu zve hydroxyethyl cellulose
Hydroxyethyl cellulose isiri-ionic mvura-inonyungudika polima ine yakanakisa kukora, kugadzira firimu, kuchengetedza mvura, kumisa uye emulsifying zvivakwa. Inowanzoshandiswa mumvura-based peints, adhesives, ceramics, inki nezvimwe zvigadzirwa. Inowanikwa nekutsiva chikamu chemapoka e-hydroxyl pane cellulose molecular chain nemapoka e-hydroxyethyl, saka ine mvura yakanaka yekunyungudika.
Mabasa makuru eHEC mumapende ndeaya:
Kukora mhedzisiro: Wedzera viscosity yepende, kudzivirira pendi kubva pakudonha, uye ita kuti ive nemhando yepamusoro yekuvaka.
Suspension effect: Inogona kuparadzira zvakaenzana uye kudzikamisa zvimedu zvakasimba senge pigment uye mafirita kudzivirira kuti asagadzikane.
Kuchengetedza mvura mhedzisiro: Wedzera kuchengetwa kwemvura kwefirimu rekuputira, wedzera nguva yakavhurika, uye gadzirisa kunyorova kwependi.
Rheology control: gadzirisa kuyerera uye kuenzana kwejasi, uye gadzirisa dambudziko rebrashi chiratidzo panguva yekuvaka.
2. Kuwedzera matanho ehydroxyethyl cellulose
Pre-dissolution nhanho Mukushanda chaiko, hydroxyethyl cellulose inoda kuparadzirwa zvakaenzana uye kunyungudika kuburikidza ne pre-dissolution process. Kuti uone kuti cellulose inogona kutamba zvizere basa rayo, inowanzokurudzirwa kuinyungudutsa mumvura kutanga, pane kuiwedzera zvakananga kumucheka. Matanho chaiwo ndeaya anotevera:
Sarudza chigadziro chakakodzera: kazhinji mvura yakasvibiswa inoshandiswa semugadziri. Kana pane mamwe organic solvents mu coating system, mamiriro ekuparara anofanirwa kugadziridzwa maererano nemaitiro eiyo solvent.
Mwaya zvishoma nezvishoma hydroxyethyl cellulose: Zvishoma nezvishoma uye zvakaenzana hydroxyethyl cellulose poda uchibvongodza mvura kudzivirira kuungana. Iko kumhanyisa kunofanirwa kunonoka kudzivirira kudzikisira kunyungudika kweselulosi kana kuumba "colloids" nekuda kwekuveura kwakanyanyisa simba.
Kuparara kwakamira: Mushure mekusasa hydroxyethyl cellulose, inoda kusiiwa kuti imire kwenguva yakati (kazhinji maminetsi makumi matatu kusvika kumaawa akati wandei) kuve nechokwadi chekuti cellulose yakazvimba zvachose uye yakanyungudika mumvura. Nguva yekuparara inoenderana nerudzi rweselulosi, tembiricha yekunyungudutsa uye mamiriro ekukurudzira.
Gadzirisa tembiricha yekunyungudika: Kuwedzera tembiricha kunobatsira kukurumidza kunyungudika kwehydroxyethyl cellulose. Kazhinji inokurudzirwa kudzora tembiricha yemhinduro pakati pe20 ℃-40 ℃. Kunyanya kupisa kunogona kukonzera kuderera kwe cellulose kana kudzikira kwemhinduro.
Kugadzirisa pH kukosha kwemushonga Kunyungudika kwehydroxyethyl cellulose kunoenderana zvakanyanya nepH kukosha kwemhinduro. Iyo inowanzonyungudika zvirinani pasi pezvakarerekera kana zvishoma alkaline mamiriro, ine pH kukosha pakati pe6-8. Munguva yekuparara, iyo pH kukosha inogona kugadziriswa nekuwedzera ammonia kana zvimwe alkaline zvinhu sezvinodiwa.
Kuwedzera hydroxyethyl cellulose mhinduro kune iyo yekuputira system Mushure mekupera, wedzera mhinduro kune yekupfeka. Munguva yekuwedzera maitiro, inofanirwa kuwedzerwa zvishoma nezvishoma uye kusimudzwa nguva dzose kuti ive nechokwadi chekusanganiswa kwakakwana neiyo yekuputira matrix. Munguva yekusanganisa maitiro, zvinodikanwa kusarudza yakakodzera kumhanyisa kumhanya zvinoenderana neakasiyana masisitimu kudzivirira sisitimu kubva mukupupa kana kuparara kwe cellulose nekuda kwekuwanda kweshear simba.
Kugadzirisa viscosity Mushure mekuwedzera hydroxyethyl cellulose, viscosity yekuputira inogona kudzorwa nekugadzirisa huwandu hwakawedzerwa. Kazhinji, huwandu hwehydroxyethyl cellulose hunoshandiswa huri pakati pe0.3% -1.0% (zvinoenderana nehuremu hwese hwejasi), uye iyo chaiyo yakawedzerwa mari inoda kugadziridzwa mukuyedza zvinoenderana nekugadzirwa kwezvinodiwa zvekupfeka. Kunyanya kuwanda kwekuwedzera kunogona kuita kuti chifukidzo chive nepamusoro-soro viscosity uye yakashata fluidity, inokanganisa kushanda kwekuvaka; nepo kusakwana kwekuwedzera kungasakwanisa kutamba basa rekukora nekumisa.
Ita chiyero uye chekuchengetedza kugadzikana bvunzo Mushure mekuwedzera hydroxyethyl cellulose uye kugadzirisa iyo coating formula, iyo coating kuvaka kuita kunoda kuongororwa, kusanganisira kuyera, sag, brashi chiratidzo chekudzora, nezvimwe. cherechedza sedimentation yejasi mushure mekumira kwenguva yakati, iyo viscosity inoshanduka, nezvimwewo, kuongorora kugadzikana kwehydroxyethyl cellulose.
3. Chengetedzo
Dzivirira agglomeration: Munguva yekunyungudutswa, hydroxyethyl cellulose iri nyore kwazvo kutora mvura nekuzvimba, saka inoda kusaswa mumvura zvishoma nezvishoma uye ive nechokwadi chekusimudzira kwakakwana kudzivirira kuumbwa kwemapundu. Ichi ndicho chinongedzo chakakosha mukushanda, kana zvisina kudaro zvinogona kukanganisa chiyero chekuparara uye kufanana.
Dzivisa simba rekugera rakakwirira: Paunenge uchiwedzera cellulose, iyo inomhanyisa kumhanya haifanirwe kunge yakakwira zvakanyanya kudzivirira kukuvadza cellulose molecular chain nekuda kwekugera simba kwakanyanya, zvichikonzera kudzikira kwekuita kwayo kukora. Uye zvakare, mukugadzirwa kunotevera kwekuputira, kushandiswa kwemidziyo yakakwira yekuveura kunofanirwawo kudzivirirwa zvakanyanya sezvinobvira.
Dzora tembiricha yekunyungudika: Pakunyungudutsa hydroxyethyl cellulose, tembiricha yemvura haifanire kunge yakanyanya kukwirira. Kazhinji inokurudzirwa kuidzora pa20 ℃-40 ℃. Pasi pemamiriro ekupisa kwepamusoro, cellulose inogona kuderera, zvichikonzera kuderera kwekukora kwayo uye viscosity.
Sarudzo yekuchengetedza: Hydroxyethyl cellulose mhinduro dzinowanzoda kugadzirirwa uye kushandiswa nekukurumidza. Kuchengetedza kwenguva refu kuchakanganisa viscosity yayo uye kugadzikana. Inowanzokurudzirwa kugadzirira mhinduro inodiwa pazuva rekugadzirwa kwepende kuti ichengetedze kushanda kwayo kwakakwana.
Kuwedzerwa kwe hydroxyethyl cellulose kune pendi haisi nyore chete kusanganisa kwemuviri maitiro, asi inodawo kusanganiswa nemaitiro chaiwo anodiwa uye maitiro ekushanda kuti ave nechokwadi chokuti kuwedzera kwayo, kumisa uye kuchengetedza mvura kunoshandiswa zvizere. Munguva yekuwedzera, teerera kune pre-dissolution nhanho, kutonga kwekushisa kwekunyungudika uye pH kukosha, uye kusanganisa kwakazara mushure mekuwedzera. Aya mashoko achakanganisa zvakananga kunaka uye kugadzikana kwekuita kwepende.
Nguva yekutumira: Sep-19-2024