Study on the modification of polyester resin bamboo fiber-based composite with euphorbia coagulum and their effect on mechanical and thermal properties

Abstract

Environmental problems caused by extensive use of polymeric materials can be solved by replacing the synthetic petroleum-based resins with natural biodegradable resins, and synthetic fiber with natural plant fiber. The blend based on euphorbia coagulum and polyester resin with different ratio of both the polymers is produced. In the polymer blend, methyl ethyl ketone peroxide used as an initiator and cobalt naphthenate as an accelerator was added. Bamboo fiber was incorporated into the polymer blend as the natural filler to fabricate composite. Herein, untreated as well as alkali treated bamboo fiber was used to fabricate the composite. Alkali treatment enhanced the compatibility between the polymer blend and the fiber. To evaluate the properties of composites, water absorption, scanning electron microscopy, mechanical test, thermogravimetric analysis, and infrared spectroscopy have been performed. Scanning electron microscopy analysis of composite shows better interlocking between the polymer blend and the fiber. The maximum enhancement in mechanical properties were observed in composite with 30% euphorbia coagulum such as tensile strength, Young’s modulus, flexural strength, and impact strength were increased up to 11%, 48%, 8%, and 60%, respectively, and water absorption decreased up to 47%. Thermogravimetric analysis and differential scanning calorimetry analysis of composite with 30% euphorbia coagulum show enhanced thermal stability up to 8%. Composite material developed was ecofriendly and can be useful for the multipurpose panel, beam, and pedestrian bridge and can replace petroleum products.

Fiber-matrix interface improvement via glycidyl methacrylate compatibilization for rotomolded poly(lactic acid)/agave fiber biocomposites

“…31 The components of natural fibers (cellulose, hemicellulose, and lignin) contain large amounts of polar hydroxyl groups producing a weak PLA-natural fiber interface. 32,33 The tensile strength of 15-GMA-BC increased from 27 to 32 MPa with the treatment, and the value for 15-GMAx2-BC was 29 MPa. However, at higher fiber contents, the negative effect of poor compatibility becomes critical, which makes necessary to enhance interfacial adhesion.…”

Viabilidade De Compósitos Poliméricos De Polipropileno Reforçados Com Fibra De Bambu

“…Os valores de MOR absolutos, entretanto, sofreram leves reduções com a incorporação de fibra de bambu. Esse comportamento pode ser explicado devido à possíveis descontinuidades na matriz polimérica produzidas pela presença de fibras, impedindo a distribuição e a transferência da carga aplicada, e assim, diminuindo a resistência dos compósitos (KUMARI et al, 2020).…”

“…O bambu, diante destas vantagens, vem sendo utilizado como matéria-prima na geração de vários tipos de materiais compósitos, tais como: madeira laminada de bambu, OSB (Oriented Strand Board), compósitos poliméricos, dentre outros. (WU et al, 2021;KUMARI et al, 2020). Estudos dos impactos da adição de fibras de bambu, entretanto, em matrizes poliméricas são ainda insipientes e, por isso, novas pesquisas são necessárias a fim de estudos mais abrangentes destes impactos e, frente a resultados positivos, contribuir para a popularização deste produto que ainda sofre paradigmas sociais quanto ao uso em larga escala.…”

“…caracterização química do material foi compatível com os valores difundidos na literatura. Já na avaliação da densidade aparente, valor obtido porKumari et al (2020) foi de 0,075 g/cm³, inferior ao presente estudo.O teor de umidade encontrado na fibra do bambu foi de 8,20 %. De acordo comSilva et al (2006), a umidade encontrada nos resíduos de soja foi de 8,40 %.…”

Caracterização Microestrutural E Perfil De Microdureza De Aço Api 5l X80 Obtido Por Processo TMCR

“…Dentre essas fibras, as de bambu vem sendo bastante utilizadas na geração de vários tipos de materiais compósitos tais como: madeira laminada de bambu, OSB (Orientaded Strand Board) obtido a partir das partículas de bambu, compósitos de plástico e bambu dentre outros (WU et al, 2021;FEBRIANTO et al, 2015;SONG et al, 2015, LOPES et al, 2019KUMARI et al, 2020).…”