Biodegradation of aliphatic polyester composites reinforced by abaca fiber

Teramoto, Naozumi; Urata, Kohei; Ozawa, Keisuke; Shibata, Mitsuhiro

doi:10.1016/j.polymdegradstab.2004.04.026

Cited by 173 publications

(103 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…[4][5][6] Tropical countries like the Philippines abound with fibrous plants, some of which are agricultural crops.Abaca is in fact one of the top export earners for the country. Abaca fiber, known as Manila hemp, is extracted from the stalk of the plant Musa textiles Nee.…”

Section: 3mentioning

confidence: 99%

Plasma-treated abaca fabric/unsaturated polyester composite fabricated by vacuum-assisted resin transfer molding

Paglicawan

Kim

Basilia

et al. 2014

Int. J. of Precis. Eng. and Manuf.-Green Tech.

View full text Add to dashboard Cite

To improve the adhesion and wetting between the abaca fibers and matrix, the surface of abaca fabric was modified using plasma polymerization. Different plasma exposure times were conducted to determine the effect of plasma treatment on the properties of the composites. A combination of plasma and other surface modification processes was also investigated to determine whether double treatments could further enhance the properties of these composites. Combined treatments involve plasma polymerization of the fabric after pretreatment with one of the following surface-modification reagents: a) γ -methacrylopropyltrimethylsilane, b) triethoxyvinylsilane, and c) 2% w/w NaOH (aq).The abaca fabric/unsaturated polyester composites were fabricated using the vacuumassisted resin transfer molding (VARTM) technique.SEM results showed that 10 to 20 seconds plasma treatment gave the right amount of surface roughness for maximum fiber and matrix adhesion leading to improved mechanical properties of the composites. Longer plasma treatment time and double treatment however resulted in composites with lower mechanical properties. Although the composite with alkali and plasma-treated fabric showed the lowest mechanical properties it exhibited the lowest water uptake in both distilled water and brine solution.

show abstract

Section: 3mentioning

confidence: 99%

Plasma-treated abaca fabric/unsaturated polyester composite fabricated by vacuum-assisted resin transfer molding

Paglicawan

Kim

Basilia

et al. 2014

Int. J. of Precis. Eng. and Manuf.-Green Tech.

View full text Add to dashboard Cite

show abstract

“…Fiber fracture is mainly observed with few parts of fiber pull-out during the examination, which reflects that a good interfacial bonding between the fiber and matrix exist in the silk fiber/PLA biocomposite by using extrusion and injection molding techniques. Yet, better interfacial bonding between reinforcement and matrix can be further improved by applying some bio-based coupling agents or performing surface modification of the fiber before or during fabrication of the biocomposite [14][15]. Samples became relatively brittle at 16th week of the test.…”

Section: Fracture Surface Characterizationmentioning

confidence: 99%

Biodegradation of a silkworm silk/PLA composite

Cheung

Lau

Pow

et al. 2010

Composites Part B: Engineering

View full text Add to dashboard Cite

Animal silks and Poly(lactic acid)(PLA) are potential materials for biomedical and bioengineering applications. Biodegradability of these materials thus is important to minimize any extra pain of patients with bone defects due to second operations for removing those non-biodegradable implants. However, the control of their biodegradability and mechanical properties is essential to ensure a smooth load transfer from a depredating implant to neo-tissue. In this study, a biodegradation test on silk/PLA biocomposites was performed. Physical and mechanical properties, pH condition of the surrounding fluid and the morphology of fractured samples were studied at specific time points. It was found that there were no significant differences This is the Pre-Published Version.between the pH values of the solution and weight loss for both pure PLA samples and silk/PLA biocomposites. Moreover, with the reinforcement of silk fiber, stiffness and ductility of PLA were enhanced and a faster biodegradation rate was observed within the 4-month biodegradation period. It can be concluded that the biodegradation rate of implants can be altered and their mechanical properties can be enhanced by incorporation of silk fiber. This is a potential solution to match with the degradation rate of PLA to the regeneration rate of neo-tissues.

show abstract

“…Tais resíduos, em primeiro momento são tidos como rejeitos no processo, mas podem sair da serraria como matéria-prima para produção de pasta e celulose, de chapas e compostos orgânicos, bem como promover a autossuficiência energética da própria indústria [26]. Assim, a inclusão de cargas, como o resíduo proveniente da indústria moveleira, é uma alternativa que agrega valor ao PLLA, tornando-o mais acessível ao mercado, aliada à vantagem da completa biodegradação [27,28].…”

Section: Introductionunclassified

Desenvolvimento de biocompósitos de poli(L-ácido láctico) (PLLA) com serragem de madeira

et al. 2017

View full text Add to dashboard Cite

RESUMOOs polímeros petroquímicos levam centenas anos para sofrerem decomposição, acarretando em acúmulo de resíduos nos lixões e aterros sanitários. Este impacto ambiental pode ser minimizado por meio do uso de polímeros biodegradáveis. Neste contexto, este trabalho buscou uma opção "ecologicamente amigável" para a substituição de polímeros sintéticos convencionais, por meio do estudo dos biocompósitos de poli(L -áci-do láctico) (PLLA) com a incorporação de resíduos de madeira (RM) e de aditivos, visando desenvolver novos compósitos. Assim, foram processados três diferentes tipos de amostras por extrusão, seguida de injeção, os biocompósitos de PLLA com adição de RM (PLLA/RM), com adição de um agente de acoplamento, o difenil-isocianato (MDI) denominadas de PLLA/RM/MDI e com adição ainda de um agente lubrificante, o Struktol® (s), denominadas de PLLA/RM/MDI/s, contendo de 0 a 40 % (m/m) de RM. As amostras foram caracterizadas por ensaio de resistência à tração, calorimetria exploratória diferencial (DSC), análise termogravimétrica (TGA), microscopia eletrônica de varredura (MEV), absorção de água, densidade, teor de vazios e espectroscopia no infravermelho com transformada de Fourier (FTIR). As amostras PLLA/RM/MDI/s foram também avaliadas quanto à biodegradação em solo. Os resultados revelaram que as amostras com MDI apresentaram melhores propriedades mecânicas, menor taxa de absorção de água, sem perda da estabilidade térmica, sugerindo que o MDI tenha promovido melhoria da adesão interfacial. Observou-se início do processo de biodegradação das amostras após 5 meses em solo, evidenciado por alterações visuais, bem como nas análises de TGA e DSC, sendo que o aumento do teor de RM acelerou o processo. Palavras-chave: biocompósitos, PLLA, resíduos de madeira, MDI, Struktol® ABSTRACTThe petrochemical polymers take hundreds of years to decompose, resulting in accumulation of waste in dumps and landfills. The environmental impact can be minimized with the use of biodegradable polymers. In this context, this study sought an option "environmentally friendly" to replace conventional synthetic polymers through the study of biocomposites from poly(L -lactic acid) (PLLA) with the incorporation of wood waste (WW) and additives in order to develop new products. Thus, we processed three different types of samples by extrusion followed by injection of PLLA biocomposites with the addition of WW: (PLLA/WW) with addition of a coupling agent, the diphenyl isocyanate (MDI) called PLLA/WW/MDI and even with the addition of a lubricating agent, the Struktol® (s), called PLLA/WW/MDI/s containing from 0 to 40 %wt of WW. The samples were characterized by tensile strength test, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), water absorption, density, void content and Fourier transformed infrared spectroscopy (FTIR). The samples PLLA/WW/MDI/s were also evaluated by biodegradation in soil. The results revealed that samples with MDI showed better mechanical properties,

show abstract

Biodegradation of aliphatic polyester composites reinforced by abaca fiber

Cited by 173 publications

References 14 publications

Plasma-treated abaca fabric/unsaturated polyester composite fabricated by vacuum-assisted resin transfer molding

Plasma-treated abaca fabric/unsaturated polyester composite fabricated by vacuum-assisted resin transfer molding

Biodegradation of a silkworm silk/PLA composite

Desenvolvimento de biocompósitos de poli(L-ácido láctico) (PLLA) com serragem de madeira

Contact Info

Product

Resources

About