Facile synthesis of novel dopamine-modified glass fibers for improving alkali resistance of fibers and flexural strength of fiber-reinforced cement

Ma, Pengfei; Xin, Minglian; Zhang, Yan; Ge, Shenguang; Wang, Dan; Jiang, Congcong; Zhang, Lína; Cheng, Xin

doi:10.1039/d1ra01875b

Cited by 9 publications

(3 citation statements)

References 59 publications

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“…In recent decades, the fiber reinforcements of cement and geopolymer composites have mainly used traditional fibers [ 1 ]. Traditional fibers include metal fibers [ 2 , 3 ], inorganic fibers [ 4 , 5 ], and synthetic fibers [ 6 , 7 ]. The production of traditional metal fibers and inorganic fibers requires a large amount of resources and high cost.…”

Section: Introductionmentioning

confidence: 99%

Alkaline Degradation of Plant Fiber Reinforcements in Geopolymer: A Review

Liu

2023

Molecules

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Plant fibers (PFs), such as hemp, Coir, and straw, are abundant in resources, low in price, light weight, biodegradable, have good adhesion to the matrix, and have a broad prospect as reinforcements. However, the degradation of PFs in the alkaline matrix is one of the main factors that affects the durability of these composites. PFs have good compatibility with cement and the geopolymer matrix. They can induce gel growth of cement-based materials and have a good toughening effect. The water absorption of the hollow structure of the PF can accelerate the degradation of the fiber on the one hand and serve as the inner curing fiber for the continuous hydration of the base material on the other. PF is easily deteriorated in the alkaline matrix, which has a negative effect on composites. The classification and properties of PFs, the bonding mechanism of the interface between PF reinforcements and the matrix, the water absorption of PF, and its compatibility with the matrix were summarized. The degradation of PFs in the alkaline matrix and solution, drying and wetting cycle conditions, and high-temperature conditions were reviewed. Finally, some paths to improve the alkaline degradation of PF reinforcement in the alkaline matrix were proposed.

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Section: Introductionmentioning

confidence: 99%

Alkaline Degradation of Plant Fiber Reinforcements in Geopolymer: A Review

Liu

2023

Molecules

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“…At present, the fibers used in composites mainly include natural fibers, metal fibers [ 21 , 22 ], inorganic fibers [ 23 , 24 , 25 ] and synthetic fibers [ 26 , 27 , 28 ]. Among them, there are many studies on synthetic-fiber-reinforced geopolymers, such as polyvinyl alcohol (PVA), polypropylene (PP), etc., but their production process pollutes the environment and faces difficulties in meeting the requirements of sustainable development [ 29 , 30 ].…”

Section: Introductionmentioning

confidence: 99%

Durability of Cellulosic-Fiber-Reinforced Geopolymers: A Review

Liu

2022

Molecules

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Geopolymers have high early strength, fast hardening speed and wide sources of raw materials, and have good durability properties such as high temperature resistance and corrosion resistance. On the other hand, there are abundant sources of plant or cellulose fibers, and it has the advantages of having a low cost, a light weight, strong adhesion and biodegradability. In this context, the geopolymer sector is considering cellulose fibers as a sustainable reinforcement for developing composites. Cellulosic-fiber-reinforced geopolymer composites have broad development prospects. This paper presents a review of the literature research on the durability of cellulosic-fiber-reinforced geopolymer composites in recent years. In this paper, the typical properties of cellulose fibers are summarized, and the polymerization mechanism of geopolymers is briefly discussed. The factors influencing the durability of cellulosic-fiber-reinforced geopolymer composites were summarized and analyzed, including the degradation of fibers in a geopolymer matrix, the toughness of fiber against matrix cracking, the acid resistance, and resistance to chloride ion penetration, high temperature resistance, etc. Finally, the influence of nanomaterials on the properties of geopolymer composites and the chemical modification of fibers are analyzed, and the research on cellulosic-fiber-reinforced geopolymer composites is summarized.

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“…Devido à necessidade de substituir o pino metálico, surgiram os pinos de fibra de vidro (PFV), utilizados atualmente por possuírem inúmeras vantagens em relação à estética, pois apresentam translucidez e naturalidade às próteses de cerâmica pura, as quais possuem as estruturas translúcidas (Cecchin et al, 2007;Cecchin et al, 2016;Pengfei et al, 2021;Aydin et al, 2022), alta resistência mecânica e à corrosão; podem ser cimentados em única consulta, o que diminui o tempo clínico; tem módulo de elasticidade semelhante à dentina, distribuindo assim a carga oclusal aplicada no dente e diminuindo a chance de fratura. Possuem alta resistência ao impacto, absorção de choques, alta resistência à fadiga, exigem menor desgaste de dentina radicular, impedindo que a raiz se fragilize e são fáceis de remover caso necessário (Keul et al, 2016;Leal et al, 2018).…”

Section: Introductionunclassified

Influência do diâmetro na resistência flexural de pinos de fibra de vidro

Silva

Martins²,

Pereira³

2022

RSD

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Os elementos dentários que possuem destruição coronária e são tratados endodonticamente tornam-se mais frágeis. O uso de retentores intrarradiculares tem se tornado uma opção viável para reabilitação de dentes comprometidos parcialmente. O objetivo deste trabalho foi avaliar se o diâmetro dos pinos apresenta resistência flexural semelhante quando comparado com diferentes marcas comerciais. Foram selecionados (n=05) pinos de fibra de vidro (PFV) de quatro marcas (FGM, ANGELUS, INDUSBELLO e SUPERPOST), nos respectivos diâmetros 0,5; 1 e 2. Os pinos foram submetidos a um teste de flexão de três pontos em uma máquina de ensaio universal (EMIC - Laboratório de Mecânica do Centro Universitário de Patos de Minas- MG), com vão de 10,0 mm, velocidade de 0,5 mm/min-1, com diâmetro da seção transversal de 2 mm da ponta de carregamento, com uma célula de carga de 500 N. Foram utilizados os testes estatísticos de Kruskal Wallis, QuiQuadrado e Dunnett. O grupo ANGELUS foi o que apresentou maior resistência flexural, no qual nota-se diferença significativa comparado ao grupo SUPERPOST 0,5 (p=0,001) e comparado ao grupo INDUSBELLO 2 (p=0,015). Houve diferença significativa entre os diâmetros dentro do mesmo grupo ANGELUS 2 e ANGLEUS 0,5 (p<0,0005). Houve diferença significativa entre os grupos SUPERPOST 2 e ANGELUS 0,5 (p = 0,026). Dentro do grupo SUPERPOST, houve diferença apenas entre os diâmetros 0,5 e 2. Dentro das marcas comerciais disponíveis no mercado, é possível perceber que com o aumento do diâmetro há um aumento da resistência flexural.

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Facile synthesis of novel dopamine-modified glass fibers for improving alkali resistance of fibers and flexural strength of fiber-reinforced cement

Abstract: In situ modification on fibers: in situ modification of self-polymerized dopamine on glass fibers was adjustably established. Relying on such nanomodification on the surface, a drastic enhancement of alkali resistance of glass fibers could be achieved.

Cited by 9 publications

References 59 publications

Alkaline Degradation of Plant Fiber Reinforcements in Geopolymer: A Review

Alkaline Degradation of Plant Fiber Reinforcements in Geopolymer: A Review

Durability of Cellulosic-Fiber-Reinforced Geopolymers: A Review

Influência do diâmetro na resistência flexural de pinos de fibra de vidro

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