Effect of diisocyanates as compatibilizer on the properties of ramie/poly(lactic acid) (PLA) composites

Yu, Tao; Hu, Chi‐Ming; Chen, Xunjian; Li, Yan

doi:10.1016/j.compositesa.2015.05.010

Cited by 60 publications

(40 citation statements)

References 21 publications

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“…Unfortunately, the incorporation of natural fibers into bioplastics may compromise certain mechanical properties such as flexural strength due to the incompatibility of natural fiber with the polymer. Many researchers reported that surface treatment can improve interfacial bonding properties of plant fiber reinforced PLA composites [11,12]. Nowadays, the composites made by natural fibers and PLA have been used for making automotive parts, and building components [13].…”

Section: Introductionmentioning

confidence: 99%

Water absorption and hygrothermal aging behavior of short ramie fiber‐reinforced poly(lactic acid) composites

Sun

et al. 2016

Polymer Composites

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Short ramie/poly(lactic acid) (PLA) composites were prepared by using extrusion and injection moulding method. The water absorption and hygrothermal aging behaviors of ramie/PLA composites at 608C was analyzed. The water absorption and mechanical properties of the ramie/PLA composites with immersion time were reported and compared to those of neat PLA. Crystallinity and molecular weight of neat PLA and ramie/PLA composites were determined by differential scanning calorimetry and gel permeation chromatography, respectively. The results showed that the water absorption and mechanical properties was affected by the short ramie fiber. Ramie/PLA composites showed higher saturation weight gains and diffusion coefficients than that of neat PLA, which indicated that the addition of short ramie fiber induced higher water absorption caused by the hydrophilic nature of the fibers. Tensile strength and flexural strength severely decreased after aging. Moreover, it was found that PLA was severely degraded in hygrothermal environment, and ramie accelerated the degradation of PLA.

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Section: Introductionmentioning

confidence: 99%

Water absorption and hygrothermal aging behavior of short ramie fiber‐reinforced poly(lactic acid) composites

Sun

et al. 2016

Polymer Composites

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“…Chen et al, [ 128 ] reported that glass transition, crystallization and melting temperatures of the developed ramie fiber‐reinforced PLA composites did not show much difference from those of neat PLA. Meanwhile, DSC analysis from Yu et al, [ 182 ] revealed that addition of compatibilizing agent (diisocyanates) increased the glass transition temperatures of the developed composites because of formation of cross‐linked structures, which results in decreased mobility of the PLA matrix chain. Crystallization temperatures also shifted to high temperature by adding diisocyanates, which indicated that the composites' crystallization rate became more rapid in nonisothermal processes.…”

Section: Fiber‐reinforced Plamentioning

confidence: 99%

Flame retardancy and thermal stability of agricultural residue fiber‐reinforced polylactic acid: A Review

et al. 2020

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Biocomposites containing natural fibers and biopolymers are an ideal choice for developing substantially biodegradable materials for different applications. Polylactic acid is a biopolymer produced from renewable resources and has drawn numerous interest in packaging, electrical, and automotive application in recent years. However, its potential application in both electrical and automotive industries is limited by its flame retardancy and thermal properties. One way to offset this challenge has been to incorporate natural or synthetic flame retardants in polylactic acid (PLA). The aim of this article is to review the trends in research and development of composites based on agricultural fibers and PLA biopolymers over the past decade. This article highlights recent advances in the fields of flame retardancy and thermal stability of agricultural fiber‐reinforced PLA. Typical fiber‐reinforced PLA processing techniques are mentioned. Over 75% of the studies reported that incorporation of agricultural fibers resulted in enhanced flame retardancy and thermal stability of fiber‐reinforced PLA. These properties are further enhanced with surface modifications on the agricultural fibers prior to use as reinforcement in fiber‐reinforced PLA. From this review it is clear that flame retardancy and thermal stability depends on the type and pretreatment method of the agricultural fibers used in developing fiber‐reinforced PLA. Further research and development is encouraged on the enhancement of the flame retardancy properties of agricultural fiber‐reinforced PLA, especially using agricultural fibers themselves as flame retardants as opposed to synthetic flame retardants that are typically used.

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“…Therefore, it is common to apply a surface treatment on plant fibers before using them as reinforcement in composites, which can enhance the bonding between fiber and matrix. Therefore, the stress transfer in the composite will also be improved [11,12]. It was found that the silane coupling agent treatment can effectively improve the interface adhesion and mechanical properties of plant fiber-reinforced polymer composites through the formation of covalent bonds between fiber and resin [13].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Nano-Mechanical Behavior on Flax Fiber Metal Laminates Using an Atomic Force Microscope

Pan

et al. 2019

Materials

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The application of plant fiber-reinforced composite (PFRC) is limited due to its relatively low mechanical properties. The hybridization of a thin metal layer with plant fiber into a fiber metal laminate can largely improve the mechanical performance and the brittle fracture behavior of PFRC. However, both plant fiber and metal have difficulty bonding with the polymer matrix. In this paper, several different surface treatment methods were applied on Al alloy sheets, and the influence of surface treatments on the surface morphology and nano-mechanical properties of Al alloy were studied using an atomic force microscope (AFM). After the preparation of flax fiber–metal laminates (FFMLs) with a vacuum-assisted resin transfer molding (VARTM) technique, the nanomechanical properties of different modified FFMLs were also evaluated with an AFM. It was found that the surface treatment combination of the sulfuric acid-ferric sulfate-based treatment (P2 etching) and the silane coupling agent provided the best adhesion force and modulus for Al alloy sheets at nanoscale resolution, which contributed to the surface energy increasing and strong covalent bonds between metal and polymer matrix. The resulting manufactured FFMLs also exhibited the highest nano-mechanical properties due to the great improvement of interfacial properties between metal and matrix, which was caused by mechanical interlocking mechanism and covalent bonds between metal/fiber and resin. Macromechanical performance, including tensile and flexural properties of these modified FFMLs, was also investigated. Comparison of the modulus at the nanoscale and macroscale showed reasonable agreement, and it revealed the tough interlaminar mechanisms of these types of FFMLs.

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Effect of diisocyanates as compatibilizer on the properties of ramie/poly(lactic acid) (PLA) composites

Cited by 60 publications

References 21 publications

Water absorption and hygrothermal aging behavior of short ramie fiber‐reinforced poly(lactic acid) composites

Water absorption and hygrothermal aging behavior of short ramie fiber‐reinforced poly(lactic acid) composites

Flame retardancy and thermal stability of agricultural residue fiber‐reinforced polylactic acid: A Review

Evaluation of Nano-Mechanical Behavior on Flax Fiber Metal Laminates Using an Atomic Force Microscope

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