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Anomalous dichroism of cellulose nanowhisker embedded
摘要： While natural nanoparticles are currently being investigated in a wide range of applications due to their compelling strong potential, they have yet to be employed for practical engineering material systems. Here, we demonstrate a dichroic nanocomposite film that shows outstanding optical properties by introducing cellulose nanowhiskers (CNWs) into PVA iodine complex. CNWs were isolated via acid hydrolysis and the nanocomposite film was elongated and dyed with iodine. The significantly reduced extension and treatment time of iodine were applied for the alignment of iodine and PVA molecules in the film. The results revealed that the degree of polarization and transmittance were enhanced as the draw ratio and the content of the CNWs increased. We expect that this material system can offer a new pathway for designing and processing more advanced engineering materials with high performances by using various natural biomaterials.
关键词： nanocomposites,nanowhisker,cellulose,nanoparticle
更新于2025-09-23 15:21:21
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Young’s Modulus of Fullerene C <sub/>60</sub> –C <sub/>70</sub> Alloy Crystalline Nanowhiskers
摘要： Crystalline nanowhiskers (NWs) composed of fullerene C60 and C70 molecules, i.e., alloy NWs, were synthesized by a liquid–liquid interfacial precipitation method. The nominal composition of C70 ranged from 0 to 40 mass%. The bending tests of the alloy NWs were performed inside a high-resolution transmission electron microscope, and the deformation behavior was observed in situ. The bending force acting on the NWs were measured simultaneously by an optical deflection method, and the Young’s modulus was estimated from the resulting force–flexure curves. The average Young’s modulus was found to increase to approximately 30 GPa as the C70 composition was increased to the solubility limit. In contrast, the Young’s modulus decreased with increasing NW diameter caused by the addition of C70.
关键词： Fullerene,Bending,Young’s Modulus,Transmission Electron Microscopy,Nanowhisker
更新于2025-09-09 09:28:46