Pintiaux Thibaud, Viet David, Vandenbossche Virginie, Rigal Luc, Rouilly Antoine
Université de Toulouse, INP-ENSIACET, LCA (Laboratoire de Chimie Agro industrielle), Toulouse F 31030, France.
INRA, UMR 1010 CAI, Toulouse F 31030, France.
Materials (Basel). 2013 May 30;6(6):2240-2261. doi: 10.3390/ma6062240.
Commercial α-cellulose was compression-molded to produce 1A dog-bone specimens under various operating conditions without any additive. The resulting agromaterials exhibited a smooth, plastic-like surface, and constituted a suitable target as replacement for plastic materials. Tensile and three-points bending tests were conducted according to ISO standards related to the evaluation of plastic materials. The specimens had strengths comparable to classical petroleum-based thermoplastics. They also exhibited high moduli, which is characteristic of brittle materials. A higher temperature and higher pressure rate produced specimens with higher mechanical properties while low moisture content produced weaker specimens. Generally, the strong specimen had higher specific gravity and lower moisture content. However, some parameters did not follow the general trend e.g., thinner specimen showed much higher Young's Modulus, although their specific gravity and moisture content remained similar to control, revealing a marked skin-effect which was confirmed by SEM observations.
商用α-纤维素在无任何添加剂的各种操作条件下被压缩模塑以生产1A狗骨形试样。所得的农用材料呈现出光滑的、类似塑料的表面，并且构成了替代塑料材料的合适目标。根据与塑料材料评估相关的ISO标准进行拉伸和三点弯曲试验。这些试样的强度与传统石油基热塑性塑料相当。它们还表现出高模量，这是脆性材料的特征。较高的温度和较高的压力速率产生具有较高机械性能的试样，而低水分含量产生较弱的试样。一般来说，强度高的试样具有较高的比重和较低的水分含量。然而，一些参数并不遵循一般趋势，例如，较薄的试样显示出高得多的杨氏模量，尽管它们的比重和水分含量与对照相似，这揭示了一种明显的表皮效应，这一点通过扫描电子显微镜观察得到了证实。
