Use of castor oil-based polyurethane adhesive in the production of glued laminated timber beams

Azambuja, Maximiliano dos Anjos; Dias, Antônio Alves

doi:10.1590/s1516-14392006000300008

Cited by 14 publications

(10 citation statements)

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“…A partir das sementes da planta de rícino (Ricinus communis) é possível extrair o denominado óleo de rícino, muitas vezes também designado por óleo de mamona. É possível fazer reagir este óleo com um isocianato aromático, Diisocianato de metileno 4,4 -difenileno (MDI), que polimeriza a frio, produzindo uma cola de poliuretano termoendurecível [70]. Enquanto o MDI é de origem petroquímica, 50 a 75% da cola é proveniente da planta de óleo de rícino e, por isso, com origem vegetal [71].…”

Section: óLeos Vegetaisunclassified

Utilização de colas naturais para placas de derivados de madeira – uma síntese

Cardoso

Nunes

Faria

2015

Ciência & Tecnologia dos Materiais

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ResumoNos últimos anos tem-se verificado um interesse crescente pela área das colas naturais, em particular na produção de placas de derivados de madeira para utilização no interior das construções. Estas colas parecem ser uma boa alternativa às colas sintéticas, derivadas do petróleo, pois, ao contribuírem para uma melhor qualidade do ar interior associada a uma menor incorporação de energia no produto final, apresentam vantagens interessantes em termos ambientais e de saúde. Nesse sentido fez-se uma revisão da bibliografia sobre a utilização laboratorial e mesmo semi-industrial de colas naturais em placas de derivados de madeira. São apresentados e discutidos alguns exemplos de materiais que estas colas aglutinam, bem como as suas características finais com vista a futuros desenvolvimentos experimentais de placas fabricadas a partir de resíduos agrícolas comuns. © 2015 Sociedade Portuguesa de Materiais (SPM). Publicado por Elsevier España, S.L. Todos os direitos reservados.Palavras chave: cola natural; derivado de madeira, resíduo agrícola; ambiente interior AbstractAn increased interest for bio-based adhesives for wood-based panels for building purposes has been arising. This type of adhesives could be a good alternative for petroleum based synthetic adhesives as bio-based adhesives can contribute for healthier indoor environments and, simultaneously, present lower embodied energy. For the previous reasons a bibliographic review was conducted, on the use of bio-based adhesives for the production of wood-based building panels. Some examples of the adhesives, the type of applications and the characterization of the resulting products are presented and compared, bearing in mind contributing for a future increase of research in this area.

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Section: óLeos Vegetaisunclassified

Utilização de colas naturais para placas de derivados de madeira – uma síntese

Cardoso

Nunes

Faria

2015

Ciência & Tecnologia dos Materiais

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“…Even though it is a monounsaturated oil, the fact that it constitutes about 90% of the oil means that there are several reaction sites that makes the oil highly polar and provides reaction points for the production of a wide range of natural and synthetic resins, waxes, polymers and elastomers [10]. It also has excellent emollient and lubricating properties, a marked ability to wet and disperse dyes, pigments and fillers [11,12], as well as several medicinal values [13]. It is described as hard non-drying oil, in that it exhibits the characteristics of multigrade engine oil which neither become too stiff when cold nor too thin when heated.…”

Section: Introductionmentioning

confidence: 99%

“…At the double bonds, the carbon atoms are held firmly together which prevent them from rotating and making rearrange of the atoms impossible without first breaking the bonds. When the Distillation characteristic of castor oil, itsBello et al; CJAST, 38(6):[1][2][3][4][5][6][7][8][9][10][11] 2019; Article no.8The fatty acid profile of the oil and biodiesel are Ricinoleic fatty acid constitutes 89.92% of the oil and 90.74 of the biodiesel. The oil and biodiesel are 98.16% and 98% unsaturated respectively…”

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confidence: 99%

A Study of the Lipid Structure of Castor Seed Oil (Ricinus communis L), Biodiesel and Its Characterization

Bello

Airen

Akinola

et al. 2020

CJAST

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The paper characterized and transesterified castor seed oil. The resulting product was tested as feedstock for biodiesel production. It was carried out at the Department of Mechanical Engineering, the Federal University of Technology, Akure, Ondo State, Nigeria, over a period of eight months. The oil was extracted in a soxhlet extractor with n-hexane as the solvent. The oil obtained was filtered and then characterized. Transesterification was carried out using a laboratory scale biodiesel processor. The fuel and physico-chemical properties of the oil and its biodiesel were determined following ASTM, EN and AOCS methods. The results revealed that all the properties of the biodiesel are within the ASTM limits for biodiesel except the kinematic viscosity. The oil contains 89% ricinoleic acid and has high solubility in methanol due to the hydroxyl group and requires minimum amount of catalyst to give maximum biodiesel yield. The heating value obtained for the oil and its biodiesel were 32 MJ/kg and 38 MJ/kg. The castor seed oil investigated has oil content of 34%, and the properties characterized are all within the limits for biodiesel. Castor oil has excellent solubility in methanol and hence theoretically an ideal feedstock for biodiesel production.

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“…The presence of a hydroxyl group at C12 of the recinoleic acid, the ester linkages, double bonds and hydroxyl groups provide reaction sites that makes it usually polar, which provide sites for the production of a wide range of natural and synthetic resins, waxes, polymers and elastomers. It also has excellent emollient and lubricating properties, a marked ability to wet and disperse dyes, pigments and fillers 7 as well as several medicinal values 8 . Castor oil has excellent solubility in methanol and hence theoretically an ideal oil for trans-esterification to biodiesel, requiring a minimum amount of catalyst and heating which can reduce cost for production 9 .…”

Section: Introductionmentioning

confidence: 99%

Physiochemical Parameters of Extracted Castor Oil in Saudi Arabia

Talab

2019

Journal of Advanced Pharmacy Research

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Objectives: This study aimed at the extraction and characterization of castor seed oil purchased from local market in Riyadh, Saudi Arabia. Methods: Castor oil was extracted from beans via extraction with n-hexane by using Soxhlet apparatus. The oil was subjected to different test for characterizations. Results: A positive test with the disappearance of the purple color of KMnO4 indicated the presence of double bond. Also the reaction of the oil with concentrated H2SO4 giving reddish brown color, has confirmed the presence of double bond. The physiochemical parameters were carried out by simple reaction and the result has showed that the color of the oil is pale yellow color, the density is 1.01 g/mL, peroxide value is 12.8 Meq/K, acid number is 0.6288 mg KOH/g and saponification value is 171.105 mg/g. Conclusion: The studied castor seeds contain a high percentage of oil, which is rich in unsaturated oil.

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Use of castor oil-based polyurethane adhesive in the production of glued laminated timber beams

Cited by 14 publications

References 1 publication

Utilização de colas naturais para placas de derivados de madeira – uma síntese

Utilização de colas naturais para placas de derivados de madeira – uma síntese

A Study of the Lipid Structure of Castor Seed Oil (Ricinus communis L), Biodiesel and Its Characterization

Physiochemical Parameters of Extracted Castor Oil in Saudi Arabia

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