تغییرات مدولای ناشی از آب بر روی نانوکامپوزیتی ناخالصی مبتنی بر زیستی مبتنی بر لاستیک طبیعی و نانوکریستالهای سلولز باکتری

Bacterial cellulose whiskers (BCWs) were firstly incorporated into natural rubber (NR) by an evaporation method. The structure, morphology, dynamic mechanical properties, water uptake and water-responsive behavior of modulus for NR/BCWs nanocomposite films were investigated. It was found that the hydrophilic BCWs generated a significant reinforcement effect on the storage modulus of NR. In the presence of water, the nanocomposite films showed a pronounced response in storage modulus, especially for the nanocomposite filled with highest filler content. The storage modulus of films with 20 phr (parts per hundred rubber) BCWs decreased by 95.3% after equilibrium swelling in water. This modulus change behavior was attributed to the disentanglement of hydrophilic filler network via competitive hydrogen bonding with water. NR/BCWs nanocomposite film could be used as a new type of shape-memory material for biomedical applications.