The Influence of Poly(Vinyl Alcohol)on Oil Release Behavior of Polylactide-Based Composites Filled with Linseed Cake  

作　　者：Olga Mysiukiewicz Mateusz Barczewski Joanna Szulc 

机构地区：[1]Division of Polymer Processing,Institute of Material Technology,Poznan University of Technology,Poznan,61-138,Poland [2]Departament of Food Industry Technology and Engineering,Faculty of Chemical Technology and Engineering,UTP University of Science and Technology,Bydgoszcz,85-326,Poland

出　　处：《Journal of Renewable Materials》2020年第4期347-363,共17页可再生材料杂志（英文）

基　　金：supported by Polish Ministry of Science and Higher Education,grant number 02/25/SBAD/4631.

摘　　要：In order to limit the negative impact of industry on natural environment,ecological alternatives to conventional polymers are being proposed.One of the most popular“green”polymers is polylactide,which can also be successfully applied as a matrix of composites.The application of ground linseed cake as a filler for polylactide-based composites is in line with the idea of Circular Economy,and moreover it provides a modifying effect on the polymer by increasing its crystallinity and reducing its brittleness.This effect is caused by the presence of linseed oil which can be released to the polymeric matrix in a non-controlled way.In order to control the miscibility of the oil and the polymer,we modified the filler particles with poly(vinyl alcohol)before introducing it to the polylactide.We concluded that poly(vinyl alcohol),which does not mix with oil,encapsulated the active ingredients inside the filler particles.We evaluated the mechanical properties of the composites containing 5,10,20 and 30 wt%of the filler in a static tensile stress and by means of dynamic mechanical thermal analysis.Crystallinity and thermal properties were tested using differential scanning calorimetry as well as thermogravimetric analysis.Composites’microstructure was evaluated by Scanning Electron Microscopy.It was found that modifying the oil-rich filler with poly(vinyl alcohol)helps to reduce its release to the matrix and thus limits the plasticizing effect of linseed cake.This result was in accordance with our hypothesis.

关 键 词：POLYLACTIDE poly(vinyl alcohol) waste filler oil release 

分 类 号：TB3[一般工业技术—材料科学与工程]