Incorporation of canola meal as a sustainable natural filler in PLA foams  

作　　者：Stephanie Weal Samir Shah Kate Parker Alankar Vaidya 

机构地区：[1]Scion,Te Papa Tipu Innovation Park,49 Sala Street,Rotorua 3010,New Zealand [2]35-45 Bend Road,Keysborough,VIC 3010,Australia

出　　处：《Bioresources and Bioprocessing》2024年第1期776-784,共9页生物资源与生物加工(英文)

基　　金：supported by the Biopolymer Network Limited(a research collaboration funded by the New Zealand Ministry of Business,Innovation and Employment).

摘　　要：The canola oil industry generates significant waste as canola meal(CM)which has limited scope and applications.This study demonstrates the possibility of valorization of CM as a sustainable natural filler in a biodegradable polymer composite of Poly(lactic acid)(PLA).Generally,interfacial bonding between natural fibers and the polymer matrix in the composite is weak and non-uniform.One possible solution is to derivatize natural fibre to introduce interfacial bond strength and compatibility with the PLA polymer matrix.Here,CM was succinylated in a reactive extrusion process using succinic anhydride at 30 wt%to get 14%derivatization with 0.02 g of-COOH density per g of CM.The CM or succinylated CM at 5 and 15 wt%was co-extruded with amorphous PLA to get composite fibers.CM-PLA and succinylated CM-PLA biocomposites were foamed using a mild and green microcellular foaming process,with CO2 as an impregnating agent without any addition of organic solvents.The properties of the foams were analyzed using differential scanning calorimetry(DSC),Dynamic mechanical thermal analysis(DMTA),shrinkage,and imaging.The addition of CM or succinylated CM as a natural filler did not significantly change the glass transition temperature,melting point,percent crystallization,stiffness,and thermal stability of PLA foams.This suggests succinylation(modification)of CM is not a mandatory step for improving interphase compatibility with the amorphous PLA.The new PLA-CM foams can be a good alternative in the packaging industry replacing the existing petroleum-based polymer foams.

关 键 词：BIOCOMPOSITE Canola meal Foam Natural filler PACKAGING Poly(lactic acid) 

分 类 号：TB3[一般工业技术—材料科学与工程]