【摘要】 经比较玉米与木薯改性淀粉膜的性能后，采用玉米改性淀粉为原料，进一步探讨成膜配方中增塑剂用量，钙盐、丙氨酸、羧甲基纤维素钠（ＣＭＣ－Ｎａ）的影响。增塑剂Ⅰ用量在２０％（重量计，下同）以内，增塑剂Ⅱ、ＣＭＣ－Ｎａ在５％到１０％之间时，可得拉伸强度、百分伸长率和耐折度均较好的可食性淀粉薄膜。适当添加乳酸钙与丙氨酸可提高膜的拉伸强度。更多还原

【Abstract】 After comparing the properties of modified-corn-starch film with that of modified-tapioca film, the formula of modified-corn-starch film are investigated further, including the amounts of plasticizer, calcium salts ,alanine, and sodium carboxymethylcellulose (CMC-Na). Edible starch film, comprising less than 20% (by weight) platicizer I and 5%-10% (by weight) platicizer Ⅱ and CMC-Na, has high tensile strength, percent elongation and folding endurance. The proper addition of calcium lactate and alanine results in an increase in the tensile strength of films.更多还原