【摘要】 以落叶松树皮低聚原花青素(OPCs)为原料，用甲醛将其与聚乙烯醇(PVA)在酸环境下反应并流延制备复合膜，测试OPCs加入量■、甲醛加入量V(mL)、反应时间t(min)和pH值等因素对膜拉伸强度、紫外吸收性、抗氧化性和水溶性等性能的影响。结果表明：拉伸强度随X增大而先增后减，在X=20时取最大值12.6 MPa;在200～400 nm内强吸收，250～350nm内全吸收；红外谱图表明含有芳基醚结构，说明OPCs与PVA发生交联；水溶性与X呈负相关。更多还原

【Abstract】 Thelarch bark oligomeric proanthocyanidins(OPCs)was reacted with poly(vinyl alcohol)(PVA) in acidic environment, and then test the influence of the four factors including OPCs, ■, addition amount of HCHO solution, V(mL), reaction time, t(min) and pH on the film’s tensile strength, UV absorbance, oxidation resistance and water solubility. The results showed that the tensile strength increased first and then decreased with X’s going big, taking the maximum value 12.6 MPa when X equalled 20%,the film’s absorption was huge within 200～400 nm and absolute within 250～350 nm, FT-IR spectrum showed the aryl ether structure, which indicated that OPCs were crosslinked with PVA, the water solubility were negatively correlated with X.更多还原