聚乙烯醇/螺旋藻改性薄膜的制备及表征

Fabrication and Characterization of Films of Polyvinyl Alcohol/Spirulina

生物质可降解薄膜能降低废弃聚合物对环境的污染。将经聚乙二醇二缩水甘油醚化学改性后的螺旋藻(SP)与聚乙烯醇(PVA)共混,通过溶液浇筑法得到了螺旋藻含量不同的聚乙烯醇/螺旋藻改性薄膜(PVA/SP-DGDE)。与未经改性的PVA/SP相比,PVA/SP-DGDE在耐水性和力学性能上均有提高,断裂伸长率提高近20%。PVA/SP-DGDE薄膜的拉伸断面形变表明经DGDE改性后的SP对PVA薄膜力学性能的提升具有促进作用。

Biodegradable films can reduce the pollutions of polymer to environment. First Spirulina （SP） is modified with diethylene glycol diglycidyl ether, then was blended with polyvinyl alcohol （PVA） to fabricate films of polyvinyl alcohol composited with modified spirulia （PVA/SP- DGDE） via solution casting. Compared with polyvinyl alcohol composited spirulina （PVA/SP） films, the water resistance and tensile strength of PVA/SP - DGDE are enhanced, with the elongation at break of PVA/SP - DGDE increased by 20% . The deformation of the broken surface shows that SP modified with DGDE can improve the mechanical properties of PVA/SP- DGDE.