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    • 8. 发明授权
    • Nanofiber sheet, process for producing the same, and fiber-reinforced composite material
    • 纳米纤维片,其制造方法和纤维增强复合材料
    • US09029275B2
    • 2015-05-12
    • US12374220
    • 2007-07-13
    • Hiroyuki YanoMasaya NogiShinsuke IfukuKentarou AbeKeishin Handa
    • Hiroyuki YanoMasaya NogiShinsuke IfukuKentarou AbeKeishin Handa
    • B32B23/02H05K1/03D21H11/08
    • H05K1/0366D21H11/08H05K2201/0251H05K2201/0284Y10T442/2869
    • Provided is a nanofiber sheet that sufficiently refined by fibrillation and has high crystallinity of cellulose fiber and can realize a fiber-reinforced composite material exhibiting high transparency, a high elastic modulus, a low coefficient of linear thermal expansion, and high heat resistance and being high in flatness and smoothness. This nanofiber sheet includes crystalline cellulose as the main component and a lignin in an amount of from 10 ppm to 10 wt %. When a fiber/resin composite material obtained by impregnating the nanofiber sheet with tricyclodecane dimethacrylate, subjecting the impregnated product to UV-curing at 20 J/cm2, and heating the cured product in vacuum at 160° C. for two hours includes 60 wt % of the cured tricyclodecane dimethacrylate and 40 wt % of nanofiber, the following physical characteristics (i) to (iii) are satisfied: (i) the parallel light transmittance of light of a wavelength of 600 nm at a sheet thickness of 100 μm is 70% or more; (ii) the Young's modulus is 5.0 GPa or more; and (iii) the coefficient of linear thermal expansion is 20 ppm/K or less.
    • 本发明提供一种纳米纤维片材,其通过原纤维化进行充分精制并具有高纤维素纤维素结晶度,并且可以实现具有高透明度,高弹性模量,低热膨胀系数和高耐热性的纤维增强复合材料,并且高 平坦度平滑。 该纳米纤维片包含结晶纤维素作为主要成分,木素含量为10〜10重量%。 当通过用三环癸烷二甲基丙烯酸酯浸渍纳米纤维片而获得的纤维/树脂复合材料,使浸渍产物以20J / cm 2进行UV固化,并且在160℃下真空加热固化产物2小时包括60重量% 的固化三环癸烷二甲基丙烯酸酯和40重量%的纳米纤维,满足以下物理特性(i)至(iii):(i)在100μm厚度下波长为600nm的光的平行光透射率为70 % 或者更多; (ii)杨氏模量为5.0GPa以上; 和(iii)线性热膨胀系数为20ppm / K以下。