目的 探究3-氨丙基三乙氧基硅烷(3-Aminopropyl Triethoxysilane, APTES)改性微晶纤维素(Microcrystalline Cellulose, MCC)对淀粉基复合薄膜的影响，以期改性得到的硅烷化微晶纤维素(Silanized Microcrystalline Cellulose, MMCC)能够提高淀粉基薄膜的性能。方法 在90 ℃下糊化淀粉后加入MCC或MMCC，以溶液浇铸法制备淀粉基复合薄膜，采用扫描电子显微镜(SEM)、热重分析(TGA)等测试手段对复合薄膜进行表观形貌和热性能分析，借助万能材料试验机、接触角测量仪等仪器对薄膜进行力学性能、耐水性能、吸湿性能等分析。结果 以APTES改性MCC后的MMCC(MCC与APTES质量比5∶1)掺入淀粉所制备的薄膜MMCC-2/ST，复合薄膜拉伸强度较原淀粉膜(Native Starch Film, ST)提高了230%，水接触角为106.4°，相较于原淀粉膜(Starch Film, ST)提高了60.8°。结论 通过实验表明，MMCC对淀粉基薄膜的力学性能、耐水性能等有较好提升，从而拓宽了淀粉基薄膜在包装领域的应用。

The work aims to explore the effects of 3-aminopropyl triethoxysilane (APTES) modified microcrystalline cellulose (MCC) on starch composite film to improve the property of starch film through silanized microcrystalline cellulose (MMCC). Firstly, the starch was gelatinized at 90 ℃ before MCC or MMCC is added. Then, the starch composite film was prepared by solution casting. The scanning electron microscope (SEM), thermogravimetric analysis (TGA) and other test methods were used to analyze the morphology and thermal properties of the composite films. The contact angle meter, universal material tensile machine and other instruments were used to analyze mechanical property, hydrolytic resistance and moisture absorption performance of the films. The results showed that for the starch film prepared by blending MMCC (the ratio of MCC to APTES was 5∶1) to starch (MMCC-2/ST):the tensile strength of MMCC-2/ST was 230% higher than that of the native starch film (ST), and the water contact angle of MMCC-2/ST was 106.4 °, 60.8° higher than that of the ST. Experiments show that, MMCC can improve the mechanical property and hydrolytic resistance of starch film, therefore broaden the application of starch film in the field of packaging.