机械力-化学法制备高性能纤维素膜综合实验设计

为实现植物资源的最大化、高值化利用,将科研成果转化为综合教学实验,以天然高分子材料微纤化纤维素为原料,设计了"高性能纤维素膜的制备及其性能表征"的研究型综合实验。采用了一种球磨法与改性剂相结合的机械力-化学法,在常温、无催化剂的条件下,使微纤化纤维素发生酯化反应,并纤丝化为直径更小的酯化纳米纤维素,从而得到了疏水的纤维素薄膜,过程简单且易于控制。所制备的纤维素膜具有优异的机械性能、耐水性及水蒸气阻隔性能。通过该实验,不仅使学生了解源于自然界中的科学前沿、激发其实验热情,还能提升学生的科研和创新能力。

Design on comprehensive experiment of high-performance cellulose membrane prepared by mechano-chemical method

In order to maximize and utilize plant resources in a high value,scientific research results are transformed into comprehensive teaching experiments.A research-oriented comprehensive experiment on the “Preparation and characterization of high performance cellulose membranes” is designed with the microfibrillarized cellulose as raw material.A mechano-chemical method combining ball milling with the modifier is used in the experiment.Under the normal temperature and without catalyst,the microfibrillated cellulose is esterified and filamented into esterified nano-cellulose with a smaller diameter,and thus hydrophobic cellulose film is obtained.The process is simple and easy to control.The prepared cellulose membrane has excellent mechanical properties,water resistance and water vapor barrier properties.Through this experiment,students can not only understand the frontier of science originating in nature and stimulate their enthusiasm for experiment,but also improve their scientific research and innovation ability.