Lub cev muaj zog
Xanthan cov pos hniav yog cov hmoov dawb mus rau daj daj daj uas tau yooj yim soluble hauv dej, tsim cov kua dej khov. Nws cov kev daws teeb meem aqueous muaj qhov tshwj xeeb siab viscosity thiab tuaj yeem tsim cov tshuab colloidal ruaj khov txawm tias tsis tshua muaj siab. Cov kev daws teeb meem coj li tsis yog -Newtonian kua; lawv cov viscosity sib txawv nrog tus nqi shear- txhais tau hais tias fluidity nce thaum nplawm lossis co, tab sis qee qhov sib xws tau khaws cia thaum cov tshuaj raug tso tseg.
Chemical Properties
Cov saw hlau molecular ntawm xanthan cov pos hniav muaj cov pab pawg ua haujlwm, xws li carboxyl thiab hydroxyl pawg; yog li ntawd, nws qhia tau hais tias ib qho kev kam rau siab rau cov kua qaub, cov hauv paus, thiab ntsev. Nws tseem nyob ruaj khov nyob rau hauv nruab nrab los yog tsis muaj zog alkaline ib puag ncig tab sis tej zaum yuav undergo ib feem degradation nyob rau hauv muaj zog acidic los yog muaj zog alkaline tej yam kev mob. Nws nthuav tawm kev ruaj ntseg zoo tiv thaiv tshav kub thiab kev ua haujlwm enzymatic, khaws nws cov khoom ua haujlwm hauv qhov kub thiab txias.
Rheological Properties
Xanthan gum solutions nthuav tawm shear-kev coj tus cwj pwm thinning-tshwj xeeb, lawv cov viscosity txo qis thaum nplawm lossis nqus dej. Cov yam ntxwv no yog qhov tseem ceeb hauv kev siv cov khoom noj khoom haus, tshuaj pleev ib ce, thiab roj av drilling kua. Nws txhim kho cov khoom raug tshem tawm ntawm cov kua dej, tiv thaiv cov sedimentation ntawm cov khoom siv, thaum tib lub sijhawm imparting tsim nyog kev ntxhib los mos los yog ntws yam ntxwv rau cov khoom kawg.
Cov khoom ntxiv
Xanthan cov pos hniav muaj peev xwm tsim cov complexes nrog ntau yam ions thiab polysaccharides, yog li txhim khu kev ruaj ntseg ntawm kev daws teeb meem. Tsis tas li ntawd, nws muaj peev xwm ua tau zoo heev emulsifying thiab gelling, tso cai rau kev tswj xyuas meej ntawm cov qauv thiab kev ntxhib los mos ntawm cov khoom noj khoom haus thiab tshuaj formulations.
