Development of blend films from soy meal protein and crude glycerol-based waterborne polyurethane

作者：Tong Xinjie; Luo Xiaolan; Li Yebo^*

来源：Industrial Crops and Products, 2015, 67: 11-17.

DOI：10.1016/j.indcrop.2014.12.063

• Crude glycerol
• Waterborne polyurethane
• Soy protein
• Blend film
• Water resistance
• Tensile strength

In the present work, crude glycerol-based waterborne polyurethane (CGWPU) was used to modify soymeal-derived protein (SMP) with improved tensile strength and water resistance. SMP CGWPU blend films were successfully prepared by casting the aqueous dispersions of SMP and CGWPU. The effects of CGWPU content on the structure and properties of the resulting films were investigated by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), differential scanning calorimetty (DSC), thermogravimetric analysis (TGA), tensile tests, and water uptake measurements. Good compatibility was observed in the blend films, which resulted from strong intermolecular interactions, such as hydrogen bonding, that existed between SMP and CGWPU. With increasing CGWPU content, SMP CGWPU blend films had improved water resistance, thermal stability, and tensile strength, but had decreased elongation at break. The performance of SMP CGWPU blend films was comparable to the SMP films blended with commercial oil-based Minwax urethane (MU).

• 出版日期2015-5