Plasma surface modification and bonding enhancement for bamboo composites

Rao, Jiuping; Bao, Lingxiang; Wang, Baowen; Fan, Mizi; Feo, Luciano

doi:10.1016/j.compositesb.2017.11.025

Cited by 78 publications

(22 citation statements)

References 61 publications

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“…With regard to fiber treatments, both physical [8,9,10] and chemical methods [11] have been employed with the aim to improve the compatibility between hydrophilic natural fibers and hydrophobic polymeric matrices [12]. Among chemical approaches, the most widely adopted is the alkali treatment also called mercerization.…”

Section: Introductionmentioning

confidence: 99%

Effect of Stacking Sequence and Sodium Bicarbonate Treatment on Quasi-Static and Dynamic Mechanical Properties of Flax/Jute Epoxy-Based Composites

Fiore

Calabrese

2019

Materials

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The present paper deals with the investigation of quasi-static and dynamic mechanical response of epoxy-based composites reinforced with flax and/or jute plain weave fabrics. In order to evaluate the influence of the stacking sequence, two monolithic laminates reinforced with flax or jute fibers and two hybrid flax/jute laminates were manufactured through the vacuum infusion technique. Furthermore, an eco-friendly and cost-effective surface treatment based on fiber soaking in a sodium bicarbonate solution was employed to improve the fiber-matrix adhesion. The mechanical characterization (by means of quasi-static flexural, dynamic mechanical thermal analysis and Charpy impact tests) allowed to evidence that the sodium bicarbonate treatment leads to noticeable improvement of the mechanical performances of flax reinforced composites, whereas jute composites experience a slight decrease of their mechanical properties. Overall, the hybridization allows to achieve intermediate mechanical properties among those of monolithic composites. Furthermore, the coupled action of hybridization and surface treatment does not lead to a beneficial and reliable effect on the mechanical response of the resulting composites.

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Section: Introductionmentioning

confidence: 99%

Effect of Stacking Sequence and Sodium Bicarbonate Treatment on Quasi-Static and Dynamic Mechanical Properties of Flax/Jute Epoxy-Based Composites

Fiore

Calabrese

2019

Materials

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“…Through oxygen plasma treatment, different functional groups can be used to introduce different functional groups on the surface of natural fibers, and these functional groups can establish strong covalent bonds with the matrix, leading to strong interfacial adhesion between the fiber and matrix. Furthermore, plasma treatment increases the surface roughness and leads to better adhesion with the hosting matrix through mechanical interlocking [149,150]. The treatment by fungi can be employed to eliminate the non-cellulosic constituents such as wax from the surface of the fiber by the effect of specific enzymes.…”

Section: Physical Treatmentsmentioning

confidence: 99%

Critical Review of the Parameters Affecting the Effectiveness of Moisture Absorption Treatments Used for Natural Composites

2019

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Natural composites can be fabricated through reinforcing either synthetic or bio-based polymers with hydrophilic natural fibers. Ultimate moisture absorption resistance at the fiber–matrix interface can be achieved when hydrophilic natural fibers are used to reinforce biopolymers due to the high degree of compatibility between them. However, the cost of biopolymers is several times higher than that of their synthetic counterparts, which hinders their dissemination in various industries. In order to produce economically feasible natural composites, synthetic resins are frequently reinforced with hydrophilic fibers, which increases the incompatibility issues such as the creation of voids and delamination at fiber–matrix interfaces. Therefore, applying chemical and/or physical treatments to eliminate the aforementioned drawbacks is of primary importance. However, it is demonstrated through this review study that these treatments do not guarantee a sufficient improvement of the moisture absorption properties of natural composites, and the moisture treatments should be applied under the consideration of the following parameters: (i) type of hosting matrix; (ii) type of natural fiber; (iii) loading of natural fiber; (iv) the hybridization of natural fibers with mineral/synthetic counterparts; (v) implantation of nanofillers. Complete discussion about each of these parameters is developed through this study.

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“…Among them, the symmetry and antisymmetric stretching vibration of -CH 2 at 2950 and 2870 cm −1 of bamboo coated with epoxy resin was weak. In the range of 2000 to 400 cm −1 , the spectrum of coated bamboo was basically the same as the spectrum of coated BS, where both exhibited the characteristic of the epoxy resin coating, including 1735 cm −1 (C=O stretching vibration in the fatty amine curing agent), 1453 cm −1 (-CH 2 in-plane bending vibration), 1395 cm −1 (-CH in-plane bending vibration), 1268 cm −1 (CO stretching vibration of ester bond), 1171 cm −1 (alkane skeleton C-C stretching vibration), and 1114 cm −1 (-C-OH stretching vibration) [28,30]. Table 2 shows the percentage results of XPS elements of each sample before and after coating.…”

Section: Chemical Analysismentioning

confidence: 99%

A Comparison of the Performance of Two Kinds of Waterborne Coatings on Bamboo and Bamboo Scrimber

Liu

et al. 2019

Coatings

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For this paper, two kinds of waterborne coatings, polyurethane acrylate (PUA) and epoxy resin, were synthesized and then coated onto neat bamboo and bamboo scrimber (BS), respectively. The coating performance of the samples was investigated. The results showed that, for the two kinds of coatings, there was a chemical reaction occurring between both coatings and the substrates. The permeability with respect to bamboo was higher than that of BS, while that of the epoxy resin coating was better than PUA. However, the PUA film was smoother than epoxy resin. The epoxy resin coating on bamboo had the best adhesion, which was at a 1 level. The abrasion values of the four samples varied in the same substrate. A higher hardness of the coating film was obtained when coated with PUA. In general, the coating performance of bamboo scrimber was poorer than that of bamboo, either coated with PUA or epoxy resin. The epoxy resin had a better coating performance than PUA.

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Plasma surface modification and bonding enhancement for bamboo composites

Cited by 78 publications

References 61 publications

Effect of Stacking Sequence and Sodium Bicarbonate Treatment on Quasi-Static and Dynamic Mechanical Properties of Flax/Jute Epoxy-Based Composites

Effect of Stacking Sequence and Sodium Bicarbonate Treatment on Quasi-Static and Dynamic Mechanical Properties of Flax/Jute Epoxy-Based Composites

Critical Review of the Parameters Affecting the Effectiveness of Moisture Absorption Treatments Used for Natural Composites

A Comparison of the Performance of Two Kinds of Waterborne Coatings on Bamboo and Bamboo Scrimber

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