Carboxymethyl cellulose (CMC) imvura inonyungudika selulosi inobuda iyo inoshandiswa zvakanyanya mumaindasitiri akasiyana siyana, kusanganisira chikafu, mishonga, uye kutarisirwa kwevanhu. Iyo dhigirii yekutsiva (DS) yakakosha parameter inobata zvimiro zveCMC. Muchikamu chino, tichakurukura pesvedzero yeDS pane carboxymethyl cellulose mhando.
Kutanga, zvakakosha kuti unzwisise kuti dhigirii rekutsiva chii. Iyo dhigirii yekutsiva inoreva huwandu hwemapoka ecarboxymethyl paglucose unit mucheni ye cellulose. CMC inogadzirwa nekuita cellulose ine sodium monochloroacetate uye sodium hydroxide. Munguva iyi yekuita, mapoka e-hydroxyl pacheni ye cellulose anotsiviwa nemapoka e-carboxymethyl. Iyo dhigirii yekutsiva inogona kudzorwa nekusiyana maitiro ekuita, senge kuwanda kwe sodium hydroxide uye sodium monochloroacetate, iyo yekuita nguva, uye tembiricha.
Iyo DS yeCMC inokanganisa maitiro ayo emuviri nemakemikari, sekunyungudika kwayo, viscosity, uye kugadzikana kwekupisa. CMC ine DS yakaderera ine dhigirii repamusoro recrystallinity uye haina kunyungudika mumvura pane CMC ine DS yakakwira. Izvi zvinodaro nekuti mapoka ecarboxymethyl muCMC ane yakaderera DS anowanikwa pamusoro pecheni ye cellulose, izvo zvinoderedza kunyungudika kwayo kwemvura. Kusiyana neizvi, CMC ine DS yakakwirira ine amorphous chimiro uye inonyungudika nemvura kupfuura CMC ine DS yakaderera.
Iyo viscosity yeCMC inobatwawo neDS. CMC ine yakaderera DS ine yakaderera viscosity pane CMC ine yakakwirira DS. Izvi zvinodaro nekuti mapoka ecarboxymethyl muCMC ane yakaderera DS akaparadzaniswa zvakanyanya, izvo zvinoderedza kudyidzana pakati pemaketani e cellulose uye kuderedza viscosity. Kusiyana neizvi, CMC ine DS yakakwira ine viscosity yepamusoro nekuti mapoka ecarboxymethyl ari pedyo pamwe chete, izvo zvinowedzera kudyidzana pakati pecheni dze cellulose uye inosimudza viscosity.
Pamusoro pezvimiro zvayo zvemuviri, iyo DS yeCMC inokanganisawo makemikari ayo. CMC ine yakaderera DS haina kugadzikana pakupisa kwakanyanya uye pH kukosha pane CMC ine DS yakakwira. Izvi zvinodaro nekuti mapoka ecarboxymethyl muCMC ane yakaderera DS anotapukirwa nehydrolysis uye anogona kuparara pasi pemamiriro akaomarara. Kusiyana neizvi, CMC ine DS yakakwira inogadzikana patembiricha yakakwira uye pH kukosha nekuti mapoka ecarboxymethyl anonyanya kusungwa kune cellulose cheni.
Nguva yekutumira: Mar-10-2023