Sodium Carboxymethyl cellulose katundu ndi Zomwe Zimagwira pa CMC Viscosity

Sodium Carboxymethyl cellulose (CMC) ndi polima yemwe amagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana, kuphatikiza chakudya, mankhwala, zinthu zosamalira anthu, ndi zotsukira. Ndi madzi osungunuka a cellulose omwe amapangidwa ndi momwe cellulose imayendera ndi chloroacetic acid ndi sodium hydroxide. CMC ndi yosunthika kwambiri ndipo ili ndi zinthu zambiri zomwe zimapangitsa kuti ikhale yoyenera kugwiritsa ntchito zosiyanasiyana. M'nkhaniyi, tikambirana za CMC ndi zinthu zomwe zimakhudza kukhuthala kwake.

Makhalidwe a CMC:

1. Kusungunuka: CMC imasungunuka kwambiri m'madzi, zomwe zimapangitsa kuti zikhale zosavuta kuzigwira ndikugwiritsa ntchito pazinthu zosiyanasiyana. Itha kusungunukanso mu zosungunulira za organic, monga Mowa ndi glycerol, kutengera kuchuluka kwake m'malo.
2. Viscosity: CMC ndi polymer yowoneka bwino kwambiri yomwe imatha kupanga ma gels pamalo okwera kwambiri. The mamasukidwe akayendedwe a CMC amatengera zinthu zosiyanasiyana, monga mlingo wa m'malo, ndende, pH, kutentha, ndi electrolyte ndende.
3. Rheology: CMC imasonyeza khalidwe la pseudoplastic, zomwe zikutanthauza kuti kukhuthala kwake kumachepa ndi kuchuluka kwa kumeta ubweya. Katunduyu ndi wothandiza pamagwiritsidwe ntchito pomwe mamasukidwe apamwamba amafunikira pakukonza, koma kukhuthala kotsika kumafunika panthawi yogwiritsira ntchito.
4. Kukhazikika: CMC ndi yokhazikika pamitundu yosiyanasiyana ya pH ndi kutentha. Zimatsutsananso ndi kuwonongeka kwa tizilombo toyambitsa matenda, zomwe zimapangitsa kuti zikhale zoyenera kugwiritsidwa ntchito pazakudya ndi mankhwala.
5. Zopangira mafilimu: CMC imatha kupanga makanema owonda, osinthika akawuma. Mafilimuwa ali ndi zotchinga zabwino ndipo amatha kugwiritsidwa ntchito ngati zokutira pazinthu zosiyanasiyana.

Zinthu zomwe zimakhudza kukhuthala kwa CMC:

1. Degree of substitution (DS): Mlingo wolowa m'malo ndi kuchuluka kwamagulu a carboxymethyl pagawo la anhydroglucose mu molekyulu ya cellulose. CMC yokhala ndi DS yapamwamba imakhala ndi digiri yapamwamba yoloweza m'malo, zomwe zimatsogolera ku mamasukidwe apamwamba. Izi ndichifukwa choti DS yapamwamba imatsogolera kumagulu ambiri a carboxymethyl, omwe amachulukitsa kuchuluka kwa mamolekyu amadzi omangika ku polima.
2. Kuyikira Kwambiri: Kukhuthala kwa CMC kumawonjezeka ndikuwonjezeka kwa ndende. Izi ndichifukwa choti pamlingo wapamwamba, maunyolo ochulukirapo a polima amakhalapo, zomwe zimapangitsa kuti pakhale kulumikizidwa kwakukulu komanso kukhuthala kwamphamvu.
3. pH: Kukhuthala kwa CMC kumakhudzidwa ndi pH ya yankho. Pa pH yotsika, CMC imakhala ndi mamasukidwe apamwamba chifukwa magulu a carboxyl ali mu mawonekedwe awo a protonated ndipo amatha kuyanjana kwambiri ndi mamolekyu amadzi. Pa pH yapamwamba, CMC imakhala ndi kukhuthala kochepa chifukwa magulu a carboxyl ali m'mawonekedwe awo owonongeka ndipo samalumikizana pang'ono ndi mamolekyu amadzi.
4. Kutentha: The mamasukidwe akayendedwe a CMC amachepetsa ndi kuwonjezeka kutentha. Izi zili choncho chifukwa pa kutentha kwakukulu, maunyolo a polima amakhala ndi mphamvu zowonjezera zowonjezera, zomwe zimatsogolera kumtunda wapamwamba wa kuyenda komanso kuchepa kwa viscosity.
5. Kukhazikika kwa Electrolyte: Kukhuthala kwa CMC kumakhudzidwa ndi kupezeka kwa ma electrolyte mu yankho. Pa kuchuluka kwa electrolyte, kukhuthala kwa CMC kumachepa chifukwa ayoni mu yankho amatha kulumikizana ndi magulu a carboxyl a polima ndikuchepetsa kuyanjana kwawo ndi mamolekyu amadzi.

Pomaliza, Sodium Carboxymethyl cellulose (CMC) ndi polima wosunthika kwambiri yemwe amawonetsa zinthu zosiyanasiyana, kuphatikiza kusungunuka, kukhuthala, rheology, kukhazikika, komanso kupanga mafilimu. The mamasukidwe akayendedwe a CMC amatengera zinthu zosiyanasiyana, monga mlingo wa m'malo, ndende, pH, kutentha, ndi electrolyte ndende. Kumvetsetsa zinthu izi ndikofunikira pakuwongolera magwiridwe antchito a CMC muzinthu zosiyanasiyana.