Evaluation of Water Absorption Damage in Hemp Fibre Reinforced Unsaturated Polyester Composites by the Nanoindentation Testing

被引：9

作者：

Dhakal, H. N. ^{[1
]}

Zhang, Z. Y. ^{[1
]}

Reis, P. N. B. ^{[2
]}

Surip, S. N. ^{[3
]}

Bennett, N. ^{[1
]}

机构：

[1] Univ Portsmouth, Sch Engn, Adv Polymer & Composites APC Res Grp, Portsmouth PO1 3DJ, Hants, England

[2] Univ Beira Interior, Electromech Engn Dept, P-6201001 Covilha, Portugal

[3] Univ Teknol MARA UiTM, Biocomposites Technol Programme, Fac Sci Appl, Shah Alam 40450, Malaysia

来源：

JOURNAL OF BIOBASED MATERIALS AND BIOENERGY | 2012年 / 6卷 / 04期

关键词：

Polymer-Matrix Composites (PMCs); Mechanical Properties; Mechanical Testing; Compression Moulding; MECHANICAL-PROPERTIES; INDENTATION; NANOCOMPOSITES; HARDNESS; MODULUS;

D O I：

10.1166/jbmb.2012.1230

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The effect of water absorption damage on the nanohardness and elastic modulus properties of the hemp fibre reinforced unsaturated polyester composites (HFRUPC) have been investigated using the nanoindentation testing. HFRUPC specimens containing 0, 28, 37 and 45 fibre wt.%, corresponding to neat UP, UP/3 layer hemp, UP/4 layer hemp and UP/5 layer hemp, respectively, were prepared and subjected to water immersion tests in a de-ionised water bath at 25 degrees C and 100 degrees C for different time durations. Elastic modulus and nanohardness properties of water immersed specimens subjected to both aging conditions are evaluated and compared alongside dry composite specimens. The elastic modulus and nanohardness properties of HFRUPC specimens were found to increase with the increase in fibre wt.% and decrease with increase in percentage moisture uptake. Nanoindentation is an effective technique to measure elastic modulus and hardness on a nanometer range. Its attractiveness lies largely from the fact that nanomechanical properties can be determined directly from indentation load and displacement measurements. SEM study was also applied to relate the decrease in properties as a result of water uptake in hemp composites.

引用

页码：493 / 499

页数：7

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