Kugadzira Maitiro e sodium carboxymethylcellulose

Maitiro ekugadzira sodium carboxymethylcellulose (CMC) anosanganisira matanho akati wandei, kusanganisira kugadzirira cellulose, etherification, kucheneswa, uye kuomesa. Heino mhedziso yeyakajairwa kugadzira maitiro:

1. Kugadzirira kweCellulose: Maitiro anotanga nekugadzirwa kweselulosi, iyo inowanzotorwa kubva muhuni pulp kana machira ekotoni. Iyo cellulose inotanga kunatswa uye kunatswa kubvisa tsvina yakadai se lignin, hemicellulose, nezvimwe zvinosvibisa. Iyi cellulose yakacheneswa inoshanda sechinhu chekutanga kugadzirwa kweCMC.
2. Alkalization: Iyo yakacheneswa cellulose inobva yabatwa nealkaline solution, kazhinji sodium hydroxide (NaOH), kuti iwedzere reactivity yayo uye kufambisa iyo inotevera etherification reaction. Alkalization inobatsirawo kuzvimba uye kuvhura iyo cellulose fiber, ichiita kuti iwanikwe nyore mukugadziriswa kwemakemikari.
3. Etherification Reaction: Iyo alkalized cellulose inobatwa ne monochloroacetic acid (MCA) kana yayo sodium munyu, sodium monochloroacetate (SMCA), pamberi pechinokonzera pasi pemamiriro ezvinhu anodzorwa. Iyi etherification reaction inosanganisira kutsiva mapoka ehydroxyl pamaketani e cellulose nemapoka ecarboxymethyl (-CH2COONA). Iyo dhigirii yekutsiva (DS), inomiririra avhareji yenhamba yemapoka ecarboxymethyl paglucose unit yeketani ye cellulose, inogona kudzorwa nekugadzirisa maitiro ekuita senge tembiricha, nguva yekuita, uye reactant concentrations.
4. Neutralization: Mushure mekuita etherification, chigadzirwa chinoguma hachina kuchinjika kushandura chero asara mapoka ane acidic kune yavo sodium munyu fomu (carboxymethylcellulose sodium). Izvi zvinowanzowanikwa nekuwedzera alkaline solution, yakadai se sodium hydroxide (NaOH), kumusanganiswa wekuita. Neutralization inobatsirawo kugadzirisa pH yemhinduro uye kudzikamisa chigadzirwa cheCMC.
5. Kucheneswa: Iyo isina kuchena sodium carboxymethylcellulose inozocheneswa kuti ibvise kusvibiswa, zvisingaite reagents, uye ne-zvigadzirwa kubva mumusanganiswa wekuita. Nzira dzekunatsa dzinogona kusanganisira kuwacha, kusefa, kuisa centrifugation, nekuomesa. Iyo CMC yakacheneswa inowanzoshambidzwa nemvura kubvisa yakasara alkali uye munyu, inoteverwa nekusefa kana centrifugation kuparadzanisa yakasimba CMC chigadzirwa kubva pachikamu chemvura.
6. Kuomesa: Iyo yakacheneswa sodium carboxymethylcellulose inozoomeswa kubvisa hunyoro hwakawandisa uye kuwana hunyoro hunodiwa hwekuchengetera nekuenderera mberi nekugadzirisa. Nzira dzekuomesa dzingasanganisira kuomeswa kwemhepo, kupfapfaidza, kana kuomeswa kwedhiramu, zvichienderana nezvinodiwa zvechigadzirwa uye chiyero chekugadzira.

Iyo inokonzeresa sodium carboxymethylcellulose chigadzirwa chichena kune-chena-chena poda kana granular zvinhu zvine yakanakisa kunyungudika kwemvura uye rheological properties. Inoshandiswa zvakanyanya seyakakora mumiriri, stabilizer, binder, uye rheology modifier mumaindasitiri akasiyana, anosanganisira chikafu, mishonga, zvizorwa, machira, uye maindasitiri ekushandisa.