Pectinase treatments on technical fibres of flax: Effects on water sorption and mechanical properties
Pectinase treatments on technical fibres of flax: Effects on water sorption and mechanical properties
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DOI：
10.1016/j.carbpol.2011.07.035
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发表时间：
2012-01-04
影响因子：
11.2
通讯作者：
Morvan, C.
中科院分区：
文献类型：
--
作者：
Alix, S.;Lebrun, L.;Morvan, C.
本研究的重点是酶促提升亚麻纤维的功能特性。用聚半乳糖醛酸酶和果胶裂解酶（PaL）对绿亚麻纤维进行了处理，并与露凝纤维进行了性能比较。形态学观察、蒸汽吸附分析和力学测量表明，pal处理不仅能够在束的划分方面模拟凝缩，而且还能改善技术纤维的力学性能。相反，这些性质在聚半乳糖醛酸酶处理后发生了改变，主要是由于存在污染的聚糖酶。在初级纤维的水平上，纳米压痕数据表明，pal处理的纤维的次级壁刚度最高。拉伸性能表现出相同的，但中等值的杨氏模量（类似于37 +/- 14 GPa）和断裂强度（类似于650 +/- 300 MPa）。我们假设生长条件对纤维化学结构的影响，与覆盖纤维素微原纤维的葡甘露聚糖的量相比，基质果胶过量。(C) 2011 Elsevier Ltd.版权所有。
This study is focused on enzymatically upgrading the functional properties of flax fibres. Green flax fibres were treated with a polygalacturonase and a pectate lyase (PaL) and their properties were compared with dew-retted fibres. Morphological observations, vapour-sorption analyses and mechanical measurements showed that PaL-treatment was able not only to mime retting in terms of bundle division, but also to improve the mechanical properties of technical fibres. Conversely, these properties were shifted clown after the polygalacturonase treatment, mainly due to the presence of contaminating glycanases. At the level of the elementary fibres, nanoindentation data indicated the highest stiffness of the secondary wall for PaL-treated fibres. The tensile properties exhibited equal, but moderate values of the Young's modulus (similar to 37 +/- 14 GPa) and breaking strength (similar to 650 +/- 300 MPa) for retted and PaL-treated fibres; we hypothesize an impact of the growth conditions on the fibre chemical structure with an excess of matrix pectins compared to the amount of glucomannan coating the cellulose microfibrils. (C) 2011 Elsevier Ltd. All rights reserved.