Effect of fiber modification with 3-isopropenyl-dimethylbenzyl isocyanate (TMI) on the mechanical properties and water absorption of hemp-unsaturated polyester (UPE) composites

Liu, Wendi; Chen, Tingting; Qiu, Renhui

doi:10.1515/hf-2013-0104

Cited by 21 publications

(10 citation statements)

References 23 publications

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“…[21,[25][26][27][28][29][30][31][32]. Our previous researches indicated that the treatment of hemp/kenaf fibers by using some bifunctional monomers such as isocyanatoethyl methacrylate, 3-isopropenyldimethylbenzyl isocyanate, and N-methylol acrylamide significantly improved the interfacial adhesion between the hemp/kenaf fibers and UPE resins, leading to enhanced mechanical properties and water resistance of the resulting composites [33][34][35][36]. In this study, 1,6-diisocyanatohexane (DIH) and 2-hydroxyethyl acrylate (HEA) were adopted to treat bamboo fibers for improving the strength and water resistance of bamboo fibers-UPE composites.…”

Section: Introductionmentioning

confidence: 99%

Effects of fiber extraction, morphology, and surface modification on the mechanical properties and water absorption of bamboo fibers‐unsaturated polyester composites

Liu

Qiu

2014

Polymer Composites

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Bamboo fibers reinforced unsaturated polyester (UPE) composites were prepared by compression molding. Effects of fiber extraction, morphology, and chemical modification on the mechanical properties and water absorption of the bamboo fibers‐UPE composites were investigated. Results showed that the unidirectional original bamboo fibers resulting composites demonstrated the highest tensile strength, flexural strength, and flexural modulus; the 30–40 mesh bamboo particles resulting composites had the lowest tensile strength and flexural strength, but had comparable flexural modulus with that of chemical pulp fibers. The treatment of bamboo fibers with 1,6‐diisocyanatohexane (DIH) and 2‐hydroxyethyl acrylate (HEA) significantly increased the tensile strength, flexural strength and flexural modulus, and water resistance of the resulting composites. Fourier Transform Infrared and X‐ray photoelectron spectroscopy analyses showed that DIH and HEA were covalently bonded onto bamboo fibers. Scanning electron microscopic images of the fractured surfaces of the composites showed that the treatment of bamboo fibers greatly improved the interfacial adhesion between the fibers and UPE resins. The water absorption kinetics of the composites was also investigated; and the results showed that the water absorption of the composites fitted Fickian behavior well. POLYM. COMPOS., 37:1612–1619, 2016. © 2014 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Effects of fiber extraction, morphology, and surface modification on the mechanical properties and water absorption of bamboo fibers‐unsaturated polyester composites

Liu

Qiu

2014

Polymer Composites

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“…Cellulose has also been modified before being used to reinforce bio-based matrices such as natural rubber [90], epoxidized soybean oil polymer [91], polyesters [92], thermoplastic polyurethanes and polyamides [93,94], and castor oil [95,96]. In few reports, cellulose was modified using OI to improve its processing and stability in fiber-reinforced cement [97,98].…”

Section: Cellulose Modification Using Aliphatic and Aromatic Isocymentioning

confidence: 99%

A Review of the Surface Modification of Cellulose and Nanocellulose Using Aliphatic and Aromatic Mono- and Di-Isocyanates

2019

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Nanocellulose has been subjected to a wide range of chemical modifications towards increasing its potential in certain fields of interest. These modifications either modulated the chemistry of the nanocellulose itself or introduced certain functional groups onto its surface, which varied from simple molecules to polymers. Among many, aliphatic and aromatic mono- and di-isocyanates are a group of chemicals that have been used for a century to modify cellulose. Despite only being used recently with nanocellulose, they have shown great potential as surface modifiers and chemical linkers to graft certain functional chemicals and polymers onto the nanocellulose surface. This review discusses the modification of cellulose and nanocellulose using isocyanates including phenyl isocyanate (PI), octadecyl isocyanate (OI), toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), hexamethylene diisocyanate (HMDI), and their derivatives and polymers. It also presents the most commonly used nanocellulose modification strategies including their advantages and disadvantages. It finally discusses the challenges of using isocyanates, in general, for nanocellulose modification.

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“…The main disadvantage of this method is the toxicity of the chemicals used. Hemp fiber were modified with 3-isopropenyldimethylbenzyl isocyanate (TMI), using dibutyltin dilaurate (DBT) as a catalyst and then used to reinforce unsaturated polyester (UPE) composites [60]. The treatment significantly increased the tensile strength, flexural strength, and water resistance of the resulting composites.…”

Section: Treatment With Isocyanatesmentioning

confidence: 99%

Interfacial Modification of Hemp Fiber–Reinforced Composites

Karaduman¹,

Özdemir²,

Karaduman³

et al. 2018

Natural and Artificial Fiber-Reinforced Composites as Renewable Sources

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Natural fiber-reinforced biocomposites are increasingly used in various industries such as automotive, construction, biomedical, and recreation, thanks to their distinctive advantages over traditional glass fiber-reinforced plastics. Natural fiber composites are sustainable, environmentally friendly, low cost, low density, and easy to proc es sasw ella sha v ehi ghmec ha n ic alproperties. The quality of fiber-matrix interface is of critical importance since it determines the load distribution capability of the material. The interface between natural fibers and polymer resins has always been problematic because of the low compatibility between cellulose-based hydrophilic natural fibers and hydrophobic polymer resins, which leads to poor fiber-matrix adhesion and therefore inefficient load distribution between fibers and matrix. To date, several interfacial modification methods have been implemented to address this issue and improve the properties of the resulting composites. This chapter focuses on the interfacial modification of hemp fiber-based composites. First, hemp fiber structure and the nature of fiber-matrix interface were explained. Mechanisms of fiber/matrix adhesion as well as qualitative and quantitative methods for the determination of interface strength were outlined. Finally, the interface modification methods for hemp fiber-reinforced biocomposites were presented in the light of scientific literature.

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Effect of fiber modification with 3-isopropenyl-dimethylbenzyl isocyanate (TMI) on the mechanical properties and water absorption of hemp-unsaturated polyester (UPE) composites

Cited by 21 publications

References 23 publications

Effects of fiber extraction, morphology, and surface modification on the mechanical properties and water absorption of bamboo fibers‐unsaturated polyester composites

Effects of fiber extraction, morphology, and surface modification on the mechanical properties and water absorption of bamboo fibers‐unsaturated polyester composites

A Review of the Surface Modification of Cellulose and Nanocellulose Using Aliphatic and Aromatic Mono- and Di-Isocyanates

Interfacial Modification of Hemp Fiber–Reinforced Composites

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