Degradation of methylcellulose during ultra-high pressure homogenisation

摘要: Abstract Initially developed for the dairy industry, very high pressure homogenisation (>100 MPa) is now also applied in pharmaceutical sector and biotechnology (breaking cells biomass extraction). The use of this technology to make fine food emulsions modify functional properties macromolecules seems be promising. Thus objective study was understand effect forces on mechanical degradation a model polymer extensively used food, cosmetic preparations: methylcellulose. Degradation studied range homogenising valve from 20 350 MPa. It observed that as imposed by homogeniser increased, intrinsic viscosity decreased. Intrinsic decrease correlated apparent changes average molecular weight polymers obtained size exclusion chromatography coupled on-line with multi-angle laser light scattering refractive index detection (SEC/MALLS/RI). strong elongational flow encountered at entrance device may bring sufficient energy disrupt covalent bonds. Consequently, shown behaviour thickening were reduced.