Inqubo Yokukhiqiza ye-sodium carboxymethylcellulose

Inqubo yokukhiqiza ye-sodium carboxymethylcellulose (CMC) ihilela izinyathelo ezimbalwa, okuhlanganisa ukulungiswa kwe-cellulose, i-etherification, ukuhlanzwa, nokomisa. Nakhu ukubuka konke kwenqubo yokukhiqiza ejwayelekile:

1. Ukulungiswa Kwe-Cellulose: Inqubo iqala ngokulungiswa kwe-cellulose, ngokuvamile etholakala ku-pulp yokhuni noma kuma-linter kakotini. I-cellulose iqale ihlanzwe futhi icwengisiswe ukuze kukhishwe ukungcola okufana ne-lignin, i-hemicellulose, nokunye ukungcola. Le cellulose ehlanziwe isebenza njengesiqalo sokukhiqizwa kwe-CMC.
2. I-Alkalization: I-cellulose ehlanzekile ibe isiphathwa ngesisombululo se-alkaline, ngokuvamile i-sodium hydroxide (NaOH), ukuze kwandiswe ukusebenza kabusha kwayo futhi kube lula ukusabela kwe-etherification okulandelayo. I-alkalization iphinde isize ekuvuvukeni futhi ivule imicu ye-cellulose, iyenze ifinyeleleke kalula ekuguqulweni kwamakhemikhali.
3. Ukusabela kwe-Etherification: I-alkalized cellulose isabela nge-monochloroacetic acid (MCA) noma usawoti wayo we-sodium, i-sodium monochloroacetate (SMCA), phambi kwe-catalyst ngaphansi kwezimo ezilawulwayo. Lokhu kusabela kwe-etherification kuhilela ukufakwa esikhundleni kwamaqembu e-hydroxyl kumaketango e-cellulose namaqembu e-carboxymethyl (-CH2COONa). I-Degree of substitution (DS), emele inombolo emaphakathi yamaqembu e-carboxymethyl ngeyunithi ngayinye ye-glucose yochungechunge lwe-cellulose, ingalawulwa ngokulungisa amapharamitha wokusabela afana nezinga lokushisa, isikhathi sokusabela, nokugxila kokusabela.
4. I-Neutralization: Ngemva kokusabela kwe-etherification, umkhiqizo owumphumela uyehliswa ukuze uguqule noma yimaphi amaqembu ane-acidic asele efomini lawo likasawoti we-sodium (carboxymethylcellulose sodium). Lokhu ngokuvamile kufezwa ngokungeza isixazululo se-alkaline, njenge-sodium hydroxide (NaOH), kungxube yokusabela. Ukungathathi hlangothi futhi kusiza ukulungisa i-pH yesisombululo futhi kuzinzise umkhiqizo we-CMC.
5. Ukuhlanzwa: I-sodium carboxymethylcellulose engahluziwe ibe isihlanzwa ukuze isuse ukungcola, ama-reagents angaphenduliwe, kanye nemikhiqizo evela kungxube yokusabela. Izindlela zokuhlanza zingase zihlanganise ukuwasha, ukuhlunga, ukugxilisa i-centrifugation, nokomisa. I-CMC ehlanziwe ivamise ukugezwa ngamanzi ukuze kukhishwe i-alkali esele nosawoti, kulandelwa ukuhlunga noma ukugxilwa kwe-centrifugation ukuze kuhlukaniswe umkhiqizo oqinile we-CMC kusukela esigabeni soketshezi.
6. Ukomisa: I-sodium carboxymethylcellulose ehlanzekile iyomiswa ekugcineni ukuze isuse umswakama owedlulele futhi ithole umswakama ofunekayo ukuze igcinwe futhi iqhubeke nokusebenza. Izindlela zokomisa zingabandakanya ukomiswa komoya, ukomisa isifutho, noma ukomiswa kwezigubhu, kuye ngezici zomkhiqizo ofunekayo kanye nesikali sokukhiqiza.

Umphumela womkhiqizo we-sodium carboxymethylcellulose uyimpushana emhlophe ukuya kokumhlophe noma impahla eyimbudumbudu enokuncibilika kwamanzi okuhle kakhulu kanye nezimpawu ze-rheological. Isetshenziswa kabanzi njenge-ejenti yokuqina, i-stabilizer, i-binder, kanye ne-rheology modifier ezimbonini ezahlukahlukene, kufaka phakathi ukudla, ezemithi, izimonyo, izindwangu, kanye nezicelo zezimboni.