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White magnetic paper based on a bacterial cellulose nanocomposite
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2018-10-09 00:00:00 , DOI: 10.1039/c8tc04103b Nipaporn Sriplai 1, 2, 3, 4 , Pornkanok Sirima 1, 2, 3, 4 , Dulayawit Palaporn 1, 2, 3, 4 , Wiyada Mongkolthanaruk 2, 3, 4, 5 , Stephen J. Eichhorn 6, 7, 8, 9, 10 , Supree Pinitsoontorn 1, 2, 3, 4, 11
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2018-10-09 00:00:00 , DOI: 10.1039/c8tc04103b Nipaporn Sriplai 1, 2, 3, 4 , Pornkanok Sirima 1, 2, 3, 4 , Dulayawit Palaporn 1, 2, 3, 4 , Wiyada Mongkolthanaruk 2, 3, 4, 5 , Stephen J. Eichhorn 6, 7, 8, 9, 10 , Supree Pinitsoontorn 1, 2, 3, 4, 11
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A newly proposed idea for the fabrication of white magnetic paper is presented. These papers are fabricated from a layered composite of bacterial cellulose (BC) sheets. Magnetic BC sheets are prepared by the incorporation of CoFe2O4 nanoparticles (NPs) in the BC structure (MBC). White BC sheets were formed by the impregnation of ZnO NPs in the BC nanofibrils (ZBC), and then forming a ZBC/MBC/ZBC sandwich structure. This structure was then hot-pressed to obtain white magnetic paper. The fabricated magnetic BC paper exhibits a ‘whiteness’ of over 80%, with a high reflectance of over 70% in the visible spectral range. XRD and SEM analysis confirmed the presence of the BC, CoFe2O4 and ZnO phases in the white magnetic paper. The whiteness of the paper is improved further with a higher concentration of ZnO NPs, but at the cost of a reduction in the mechanical properties. Magnetic hysteresis was observed in the fabricated white magnetic paper with a saturation magnetization of ∼20 emu g−1, comparable to the literature values for black magnetic papers. The white magnetic paper was demonstrated to exhibit flexibility and foldability just like regular paper sheets but can also be distinguished by subjecting it to an external magnetic field. This gives potential for its use as security paper or in anti-counterfeiting applications.
中文翻译：
基于细菌纤维素纳米复合材料的白色磁性纸
提出了一种新提出的制造白磁纸的想法。这些纸是由细菌纤维素（BC）片的层状复合材料制成的。通过在BC结构（MBC）中掺入CoFe 2 O 4纳米颗粒（NPs）来制备磁性BC片。通过在BC纳米原纤维（ZBC）中浸渍ZnO NP形成白色BC片，然后形成ZBC / MBC / ZBC夹心结构。然后将该结构热压以获得白磁性纸。制成的磁性BC纸的“白度”超过80％，在可见光谱范围内的反射率超过70％。XRD和SEM分析证实了BC，CoFe 2 O 4的存在和白色磁性纸中的ZnO相。ZnO NPs的浓度较高时，纸的白度会进一步提高，但会降低机械性能。在制造的白色磁性纸中观察到磁滞，其饱和磁化强度约为20 emu g -1，与黑色磁性纸的文献值相当。事实证明，白色磁性纸具有与普通纸一样的柔韧性和可折叠性，但也可以通过使其受到外部磁场的作用来区分。这为其用作证券纸或防伪应用提供了潜力。
更新日期：2018-10-09
中文翻译：
基于细菌纤维素纳米复合材料的白色磁性纸
提出了一种新提出的制造白磁纸的想法。这些纸是由细菌纤维素（BC）片的层状复合材料制成的。通过在BC结构（MBC）中掺入CoFe 2 O 4纳米颗粒（NPs）来制备磁性BC片。通过在BC纳米原纤维（ZBC）中浸渍ZnO NP形成白色BC片，然后形成ZBC / MBC / ZBC夹心结构。然后将该结构热压以获得白磁性纸。制成的磁性BC纸的“白度”超过80％，在可见光谱范围内的反射率超过70％。XRD和SEM分析证实了BC，CoFe 2 O 4的存在和白色磁性纸中的ZnO相。ZnO NPs的浓度较高时，纸的白度会进一步提高，但会降低机械性能。在制造的白色磁性纸中观察到磁滞，其饱和磁化强度约为20 emu g -1，与黑色磁性纸的文献值相当。事实证明，白色磁性纸具有与普通纸一样的柔韧性和可折叠性，但也可以通过使其受到外部磁场的作用来区分。这为其用作证券纸或防伪应用提供了潜力。
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