Department of Chemical Engineering, Inha University, 100 Inha-ro, Michuhol-gu, Incheon 22212, South Korea.
Department of Polymer Science and Engineering, Inha University, 100 Inha-ro, Michuhol-gu, Incheon 22212, South Korea; Program in Environmental & Polymer Engineering, Inha University, 100 Inha-ro, Michuhol-gu, Incheon 22212, South Korea.
Carbohydr Polym. 2021 Feb 15;254:117470. doi: 10.1016/j.carbpol.2020.117470. Epub 2020 Dec 2.
Tunicate cellulose nanofibers (CNFs) have received widespread attention as renewable and eco-friendly engineering materials because of their high crystallinity and mechanical stiffness. Here, we report the effects of disintegration process conditions on structure-property relationships of tunicate CNFs. By varying the hydrolysis time, we could establish a correlation between crystallinity of the CNFs with linearity and stiffness, which produces different molecular ordering within their nanostructured films. Despite having identical raw materials, tensile strength and thermal conductivity of the resulting layered films varied widely, ranging from 95.6 to 205 MPa and from 1.08 to 2.37 W/mK respectively. Furthermore, nanolayered CNF films provided highly anisotropic thermal conductivities with an in- and through-plane ratio of 21.5. Our systematic investigations will provide general and practical strategies in tailoring material properties for emerging engineering applications, including flexible paper electronics, heat sink adhesives and biodegradable, implantable devices.
被囊纤维素纳米纤维（CNFs）因其高结晶度和机械刚度而作为可再生和环保的工程材料受到广泛关注。在这里，我们报告了解体过程条件对被囊 CNFs 的结构-性能关系的影响。通过改变水解时间，我们可以建立 CNFs 的结晶度与其线性度和刚度之间的相关性，这会在它们的纳米结构薄膜内产生不同的分子有序性。尽管使用了相同的原材料，但所得层状薄膜的拉伸强度和导热系数差异很大，范围分别为 95.6 至 205 MPa 和 1.08 至 2.37 W/mK。此外，纳米层状 CNF 薄膜提供了具有高达 21.5 的面内和面外比的各向异性导热系数。我们的系统研究将为新兴工程应用提供通用和实用的材料性能定制策略，包括柔性纸质电子产品、散热器粘合剂以及可生物降解的植入式器件。
