Njira Yopangira ndi Makhalidwe a Sodium Carboxymethyl cellulose

Sodium carboxymethyl cellulose (Na-CMC) ndi polima yosungunuka m'madzi yochokera ku cellulose, yomwe imagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana monga chakudya, mankhwala, zodzoladzola, nsalu, ndi kubowola mafuta. Amadziwika ndi kukhuthala kwake, kukhazikika, komanso kumangirira. M'nkhaniyi, tikambirana za kupanga ndi makhalidwe a sodium carboxymethyl cellulose.

Njira Yopanga Sodium Carboxymethyl Cellulose

Kupanga kwa Na-CMC kumaphatikizapo masitepe angapo, kuphatikiza kuchotsedwa kwa cellulose ku zamkati zamatabwa, ma linter a thonje, kapena zinthu zina, kutsatiridwa ndi kusinthidwa kwa cellulose kuti apange magulu a carboxymethyl. Njira yopangira Na-CMC ikhoza kufotokozedwa mwachidule motere:

1. Ma cellulose m'zigawo: Ma cellulose amachotsedwa muzamkati mwamatabwa kapena kuzinthu zina kudzera munjira zingapo zamakina ndi mankhwala, kuphatikiza pulping, bleaching, ndi kuyenga.
2. Chithandizo cha Alkali: Ma cellulose otengedwa amawathiridwa ndi mankhwala amphamvu a alkaline, omwe nthawi zambiri amakhala sodium hydroxide (NaOH), kuti afufuze ulusi wa cellulose ndikuwululira magulu a hydroxyl omwe akugwira ntchito.
3. Etherification: Ulusi wotupa wa cellulose umapangidwa ndi sodium monochloroacetate (SMCA) pamaso pa chothandizira cha alkaline monga sodium carbonate (Na2CO3) kuti awonetse magulu a carboxymethyl pamsana wa cellulose.
4. Neutralization: The carboxymethylated cellulose ndiye amachotsedwa ndi asidi monga hydrochloric acid (HCl) kapena sulfuric acid (H2SO4) kupanga Na-CMC.
5. Kuyeretsedwa ndi Kuyanika: Na-CMC imayeretsedwa ndi kuchapa ndi kusefa kuchotsa zonyansa zilizonse ndikuumitsa kuti ipeze ufa wopanda madzi.

Makhalidwe a Sodium Carboxymethyl cellulose

Katundu wa Na-CMC amatha kusiyanasiyana kutengera kuchuluka kwa m'malo (DS), zomwe zikutanthauza kuchuluka kwamagulu a carboxymethyl pa anhydroglucose unit (AGU) ya cellulose. Zina mwazofunikira za Na-CMC ndi:

1. Kusungunuka: Na-CMC imasungunuka kwambiri m'madzi ndipo imatha kupanga zomveka bwino komanso zowoneka bwino m'madzi.
2. Viscosity: Kukhuthala kwa mayankho a Na-CMC kumadalira kuchuluka kwake, DS, ndi kulemera kwa ma polima. Na-CMC imadziwika chifukwa cha kukhuthala kwabwino kwambiri ndipo itha kugwiritsidwa ntchito kukulitsa kukhuthala kwa mayankho ndi kuyimitsidwa.
3. Kukhazikika kwa pH: Na-CMC ndi yokhazikika pamitundu yambiri ya pH, kuchokera ku acidic kupita ku zamchere, ndikupangitsa kuti ikhale yoyenera kugwiritsidwa ntchito pazinthu zosiyanasiyana.
4. Kulekerera Kwamchere: Na-CMC imalekerera kwambiri mchere ndipo imatha kusunga kukhuthala kwake komanso kukhazikika pamaso pa ma electrolyte.
5. Kukhazikika kwamafuta: Na-CMC imakhala yokhazikika pakutentha kwambiri ndipo imatha kugwiritsidwa ntchito m'mafakitale osiyanasiyana omwe amafunikira kutentha kwambiri.
6. Biodegradability: Na-CMC ndi biodegradable ndipo akhoza kutayidwa mosamala m'chilengedwe.

Mapeto

Sodium carboxymethyl cellulose ndi polima yosunthika yomwe imagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana chifukwa cha kukhuthala kwake, kukhazikika, komanso kumangirira. Kapangidwe ka Na-CMC kumakhudzanso kuchotsedwa kwa cellulose ndikutsatiridwa ndi kusinthidwa kwa cellulose kuti apange magulu a carboxymethyl. Na-CMC ili ndi mikhalidwe ingapo monga kusungunuka, kukhuthala, kukhazikika kwa pH, kulolerana kwa mchere, kukhazikika kwamafuta, komanso kuwonongeka kwachilengedwe, komwe kumapangitsa kuti ikhale yoyenera kugwiritsidwa ntchito pazinthu zosiyanasiyana. Makhalidwe a Na-CMC amatha kusinthidwa ndikuwongolera kuchuluka kwa m'malo, kulemera kwa maselo, komanso kukhazikika, ndikupangitsa kuti ikhale chida chofunikira pamachitidwe osiyanasiyana amakampani.