Impact of hemp woody core surface chemical modification on wettability of epoxyurethane composites

IF 2.1 4区材料科学 Q3 MATERIALS SCIENCE, COMPOSITES

Composite Interfaces Pub Date : 2023-06-26 DOI:10.1080/09276440.2023.2229585

T. Samoilenko, L. Yashchenko, Nataliia Yarova, O. Brovko

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引用次数: 0

Abstract

ABSTRACT Hemp woody core (HWC) that is a by-product of hemp industry was subjected to pre-treatment with alkali (mercerisation) and further functionalisation with epoxidised soybean oil (ESO) or (3-aminopropyl)triethoxysilane (APS). Mercerisation resulted in more developed surface area and rearrangement of fibrils into denser packing. FTIR spectroscopy analysis revealed the presence of hydrogen bonds of HWC with modifier in case of ESO application as well as hydrogen and Si-O-C covalent bonds in case of APS application. Two types of Si-containing epoxyurethanes were filled with 60% of HWC with different surface modification: the first polymer contained diglycidyl ether of bisphenol-A (DGEBA), while the second one contained ESO as an epoxy component. The investigation of the surface properties of composites found that the ones based on ESO epoxyurethane were more hydrophobic than their respective counterparts. Hydrophilicity was reduced by functionalisation of HWC providing a contact angle augment from 54°for DGEBA-containing sample with raw HWC to 86° for the one with oil modified HWC. The results of water uptake test showed that regardless of the matrix the composites reinforced with functionalised HWC exhibited about 40% less gain in weight at the saturation level than their analogues reinforced with untreated or alkali treated HWC. Graphical abstract

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来源期刊

Composite Interfaces 工程技术-材料科学：复合

CiteScore

5.00

自引率

3.80%

发文量

审稿时长

3 months

期刊介绍： Composite Interfaces publishes interdisciplinary scientific and engineering research articles on composite interfaces/interphases and their related phenomena. Presenting new concepts for the fundamental understanding of composite interface study, the journal balances interest in chemistry, physical properties, mechanical properties, molecular structures, characterization techniques and theories. Composite Interfaces covers a wide range of topics including - but not restricted to: -surface treatment of reinforcing fibers and fillers- effect of interface structure on mechanical properties, physical properties, curing and rheology- coupling agents- synthesis of matrices designed to promote adhesion- molecular and atomic characterization of interfaces- interfacial morphology- dynamic mechanical study of interphases- interfacial compatibilization- adsorption- tribology- composites with organic, inorganic and metallic materials- composites applied to aerospace, automotive, appliances, electronics, construction, marine, optical and biomedical fields