Njira zopangira ndi kugwiritsa ntchito mitundu yonse ya sodium carboxymethyl cellulose (CMC)

Sodium carboxymethyl cellulose (CMC) ndi anionic, straight chain, water-soluble cellulose ether, yochokera ku achilengedwe cellulose ndi chloroacetic acid mwa kusintha kwa mankhwala. Madzi ake ali ndi ntchito zokhuthala, kupanga filimu, kugwirizana, kusunga madzi, kuteteza colloidal, emulsification ndi suspension, ndipo ingagwiritsidwe ntchito ngati flocculant, chelating agent, emulsifier, thickener, water retaining agent, sizeing agent, film forming material, etc., yomwe imagwiritsidwa ntchito kwambiri mu chakudya, mankhwala, zamagetsi, mankhwala ophera tizilombo, zikopa, mapulasitiki, kusindikiza, ziwiya zadothi, makampani a mankhwala a tsiku ndi tsiku ndi madera ena.

Sodium carboxymethyl cellulose nthawi zambiri imakhala yolimba ngati ufa, nthawi zina yopyapyala kapena yopyapyala, yoyera kapena yachikasu chopepuka, yopanda fungo lapadera, ndi mankhwala a macromolecular, imatha kunyowa kwambiri, imatha kusungunuka m'madzi, m'madzi kuti ipange yankho lokhuthala komanso lowonekera bwino. Sisungunuka m'njira zachilengedwe monga ethanol, ether, chloroform ndi benzene, koma imatha kusungunuka m'madzi, imasungunuka mwachindunji m'madzi pang'onopang'ono, koma kusungunuka kumakhalabe kwakukulu kwambiri, ndipo yankho lamadzi lili ndi kukhuthala kwina. Yolimba m'malo onse ndi yokhazikika, chifukwa imakhala ndi madzi okwanira komanso chinyezi, m'malo ouma, imatha kusungidwa kwa nthawi yayitali.

① Njira yopangira

1. Njira yogwiritsira ntchito madzi

Njira yopangira madzi ndi malasha ndi njira yopangira koyambirira kwa mafakitale popanga sodium carboxymethyl cellulose. Mu njira imeneyi, alkali cellulose ndi etherifying agent zimakumana ndi yankho lamadzi lomwe lili ndi ma ion a oxygen oxide aulere, ndipo madzi amagwiritsidwa ntchito ngati njira yopangira zinthu mu njira yopangira zinthu, popanda zinthu zachilengedwe zosungunulira.

2. Njira yosungunulira

Njira yosungunulira ndi njira yosungunulira yachilengedwe, yomwe ndi njira yopangira yomwe imapangidwa pogwiritsa ntchito njira yosinthira madzi kuti isinthe madzi ndi organic solvent ngati njira yosinthira. Njira yopangira alkaliization ndi etherization ya alkali cellulose ndi monochloroacetic acid mu organic solvent. Malinga ndi kuchuluka kwa njira yosinthira, imatha kugawidwa m'njira yokanda ndi njira yosambira. Kuchuluka kwa organic solvent yomwe imagwiritsidwa ntchito mu njira yokanda ndi kwakukulu kwambiri kuposa kwa njira yokanda, ndipo kuchuluka kwa organic solvent yomwe imagwiritsidwa ntchito mu njira yokanda ndi chiŵerengero cha kulemera kwa kuchuluka kwa cellulose, pomwe kuchuluka kwa organic solvent yomwe imagwiritsidwa ntchito mu njira yokanda ndi chiŵerengero cha kulemera kwa kuchuluka kwa cellulose. Pamene sodium carboxymethyl cellulose yakonzedwa ndi njira yosambira, reaction solid imakhala mu slurry kapena suspension state mu system, kotero njira yosambira imatchedwanso suspension method.

3. Njira yothira madzi

Njira yothira matope ndi ukadaulo waposachedwa kwambiri wopanga sodium carboxymethyl cellulose. Njira yothira matope siingopanga sodium carboxymethyl cellulose yoyera kwambiri, komanso imapanga sodium carboxymethyl cellulose yokhala ndi digiri yapamwamba yosinthira komanso yofanana. Njira yopangira njira yothira matope ndi motere: thonje lomwe laphwanyidwa kukhala ufa limatumizidwa ku makina okhazikika okhala ndi isopropyl alcohol, ndipo yankho la sodium hydroxide lomwe limawonjezeredwa likasakanizidwa limasinthidwa, ndipo kutentha kwa alkalizing kumakhala pafupifupi 20℃. Pambuyo pa alkalizing, zinthuzo zimapopedwa ku makina okhazikika othira matope, ndipo yankho la isopropyl alcohol la chloroacetic acid limawonjezeredwa, ndipo kutentha kwa etherifying kumakhala pafupifupi 65℃. Malinga ndi zomwe zimagwiritsidwa ntchito komanso mtundu wa chinthucho, kuchuluka kwa alkalizing, nthawi ya alkalizing, kuchuluka kwa etherifying agent ndi nthawi ya etherification ndi magawo ena azinthu zitha kusinthidwa.

② Chiwerengero cha ntchito

1. CMC si chinthu chokhazikika komanso chokhuthala bwino chomwe chimapangidwa ndi emulsifying mu chakudya, komanso chimakhala ndi kuzizira bwino komanso kusungunuka bwino, ndipo chimatha kusintha kukoma kwa chinthucho ndikuwonjezera nthawi yosungira.

2. Mu sopo wothira, CMC ingagwiritsidwe ntchito ngati chothandizira choletsa kuipitsa malo, makamaka chifukwa cha zotsatira za hydrophobic synthetic fiber texture anti-fouling redeposition, zomwe zimakhala bwino kwambiri kuposa carboxymethyl fiber.

3. Pobowola mafuta, zitsime zamafuta zingagwiritsidwe ntchito kuteteza matope, zomwe zimathandiza kusunga madzi, kuchuluka kwa chitsime chilichonse chamafuta ndi 2 ~ 3t Zitsime zosaya kwambiri, zitsime zakuya 5 ~ 6t.

4. Amagwiritsidwa ntchito mumakampani opanga nsalu ngati chothandizira kukula, chosindikizira ndi kupaka utoto wa slurry thickener, chosindikizira nsalu ndi kumaliza kolimba.

5. Amagwiritsidwa ntchito ngati chophikira choletsa kukhazikika, emulsifier, dispersant, leveling agent, zomatira, amatha kupanga gawo lolimba la utoto kugawidwa mofanana mu zosungunulira, kotero kuti utoto sunagawanike kwa nthawi yayitali, komanso umagwiritsidwa ntchito mu putty.

6. Monga flocculant pochotsa ayoni a calcium kuposa sodium gluconate yothandiza kwambiri, monga cation exchange, mphamvu yosinthira mpaka 1.6ml/g.

7. Mu makampani opanga mapepala, zomwe zimagwiritsidwa ntchito ngati chothandizira kukula kwa mapepala, zimatha kusintha kwambiri mphamvu youma ndi yonyowa ya kukana mapepala ndi mafuta, kuyamwa kwa inki komanso kukana madzi.

8. Monga hydrosol mu zodzoladzola, yomwe imagwiritsidwa ntchito ngati chowonjezera mu mano otsukira mano, mlingo wake ndi pafupifupi 5%.

Wopanga ndi Wogulitsa Carboxymethyl Cellulose (CMC) Wogulitsa | EVERBRIGHT (cnchemist.com)