Mechanical and Morphological Properties of Lignin-Based Thermosets,ACS Applied Polymer Materials

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Mechanical and Morphological Properties of Lignin-Based Thermosets
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2020-01-28 , DOI: 10.1021/acsapm.9b01007
Marcus E. Jawerth _{1,

2} , Calvin J. Brett _{1,

2,

3,

4} , Cédric Terrier _{2,

5} , Per T. Larsson _{1,

6} , Martin Lawoko ₁ , Stephan V. Roth _{2,

3} , Stefan Lundmark ₇ , Mats Johansson _{1,

2}

Affiliation

The need for renewable alternatives for fossil-based aromatic material constituents is evident for a more sustainable society. Lignin is the largest source of naturally occurring aromatic compounds but has mainly been considered as waste material or energy source in the pulp and paper industry. Developments in extracting lignin from these processes provide a large source for renewable aromatic structures to be used in various applications. Producing thermosets out of lignin is a very promising route to utilize this raw material toward, for example, composite application. The buildup of the molecular network based on oligomeric lignin segments will be different from traditional thermoset analogues, where the constituents often are smaller molecules, and will have an effect on the material properties. In this work LignoBoost Kraft lignin is refined, chemically modified, and used to produce freestanding thermosets with different architectures and properties. These different thermosets are evaluated, and the possibilities to tailor the material properties through work-up and modification are demonstrated. Morphological studies on the formed thermosets using X-ray scattering show systematic differences in molecular stacking and aggregate sizes.

中文翻译：

木质素基热固性塑料的力学和形态学特性

对于一个可持续发展的社会而言，对于基于化石的芳香材料成分的可再生替代品的需求显而易见。木质素是天然存在的芳族化合物的最大来源，但在纸浆和造纸工业中主要被认为是废料或能源。从这些方法中提取木质素的发展为可用于各种应用的可再生芳族结构提供了巨大的来源。用木质素生产热固性塑料是将这种原料用于例如复合应用的非常有前途的途径。基于寡聚木质素链段的分子网络的建立将不同于传统的热固性类似物，后者的成分通常是较小的分子，并且会影响材料的性能。在这项工作中，LignoBoost Kraft木质素精制而成，经过化学修饰，并用于生产具有不同结构和特性的独立式热固性塑料。对这些不同的热固性材料进行了评估，并展示了通过后处理和修改来定制材料性能的可能性。使用X射线散射对形成的热固性塑料进行的形态学研究表明，分子堆积和聚集体尺寸存在系统性差异。

更新日期：2020-01-29

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