Optimization of process parameters of recycled carbon fiber-reinforced thermoplastic prepared by the wet-laid hybrid nonwoven process

Yan, Xin; Wang, Xiwen; Yang, Junxiao; Zhao, Guanglei

doi:10.1177/0040517520987212

Cited by 9 publications

(5 citation statements)

References 31 publications

(32 reference statements)

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“…Therefore, the molding pressure levels were determined as 0, 2, and 5 MPa. The automotive industry can be a promising field for fiber composites' application 28 and requires fast production and low cost 29 . Thus, the molding temperature levels were determined as 190, 220, and 250°C, and the molding time levels were determined as 0, 10, and 20 min.…”

Section: Resultsmentioning

confidence: 99%

Void content of polypropylene/carbon fiber wet‐laid nonwoven composites: Effect of fiber content and molding conditions, and void elimination mechanism

et al. 2023

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Various wet‐laid nonwoven composites have been well‐developed in recent decades. However, studies that systematically investigate the factors affecting the void content of wet‐laid nonwoven composites are still missing. This paper aims to study the factors affecting the void content of wet‐laid nonwoven composites and propose a mechanism for void elimination in wet‐laid nonwoven composites. Polypropylene (PP) and carbon fiber (CF) were chosen to manufacture PP/CF wet‐laid nonwoven composites. An orthogonal experimental design found that the CF content and molding pressure can dominate the void content while molding temperature and time have non‐significant effects. Subsequently, this paper proposed that the void elimination mechanism is the compression of the impregnated CF network and the trapped air (compression mechanism) instead of the matrix's infiltration to the dry CF network (infiltration mechanism). In order to validate the compression mechanism, we developed an analytical model for predicting the void content of the PP/CF wet‐laid nonwoven composites. Good agreement between the predicted and the experimental void content suggests that void elimination follows the compression mechanism.Highlights An orthogonal experimental design reveals that the CF content and molding pressure can dominate the void content of the PP/CF wet‐laid nonwoven composite, while molding temperature and time have non‐significant effects. A mechanism (i.e., compression mechanism) is proposed to explain the effect of CF content and molding conditions on the void content of the PP/CF wet‐laid nonwoven composite. Good agreement between the experimental and the predicted void content validates the compression mechanism.

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Section: Resultsmentioning

confidence: 99%

Void content of polypropylene/carbon fiber wet‐laid nonwoven composites: Effect of fiber content and molding conditions, and void elimination mechanism

et al. 2023

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show abstract

“…Therefore, the molding pressure levels were determined as 0, 2, and 5 MPa. The automotive industry can be a promising eld for ber composites' application [28] and requires fast production and low cost [29] . Thus, the molding temperature levels were determined as 190, 220, and 250℃, and the molding time levels were determined as 0, 10, and 20 min.…”

Section: Selection Of Factors and Their Levelsmentioning

confidence: 99%

Void content of PP/CF Wet-laid Nonwoven Composites: Effect of Fiber Content and Molding Conditions, and Void Elimination Mechanism

Yan

2023

Preprint

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Various wet-laid nonwoven composites have been well-developed in recent decades. However, studies that systematically investigate the factors affecting the void content of wet-laid nonwoven composites are still missing. This paper aims to study the factors affecting the void content of wet-laid nonwoven composites and propose a mechanism for void elimination in wet-laid nonwoven composites. Polypropene (PP) and carbon fiber (CF) were chosen to manufacture PP/CF wet-laid nonwoven composites. An orthogonal experimental design found that the CF content and molding pressure can dominate the void content while molding temperature and time have non-significant effects. Subsequently, this paper proposed that the void elimination mechanism is the compression of impregnated CF network (compression mechanism) instead of the matrix’s infiltration to the dry CF network (infiltration mechanism). In order to validate the compression mechanism, the compression curve of the dry CF network was transformed into curves predicting the void content of the PP/CF nonwoven composites. Comparing the predicted and experimental void content suggests that void elimination follows the compression mechanism.

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“…This work considers WL rCFs in conjunction with commodity thermoplastics, such as PP and PET, as well as engineering thermoplastics, such as PA66. Yan et al [18] investigated process parameters of WL rCF-reinforced thermoplastic (CFRTP) nonwoven mats. They used response surface methodology to optimize the heatmolding compression parameters in terms of temperature, pressure and time, respectively.…”

Section: Literature Reviewmentioning

confidence: 99%

Mechanical Response and Processability of Wet-Laid Recycled Carbon Fiber PE, PA66 and PET Thermoplastic Composites

et al. 2022

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The interest in recycled carbon fiber (rCF) is growing rapidly and the supply chain for these materials is gradually being established. However, the processing routes, material intermediates and properties of rCF composites are less understood for designers to adopt them into practice. This paper provides a practical pathway for rCFs in conjunction with low cost and, for the most part, commodity thermoplastic resins, namely polyethylene (PE), polyamide 66 (PA66) and polyethylene terephthalate (PET). Industrially relevant wet-laid (WL) process routes have been adopted to produce mats using two variants of WL mats, namely (a) high speed wet-laid inclined wire to produce broad good ‘roll’ forms and (b) 3DEPTM process patented by Materials Innovation Technologies (MIT)-recycled carbon fiber (RCF), now Carbon Conversions, which involves mixing fibers and water and depositing the fibers on a water-immersed mold. These are referred to as ‘sheet’ forms. The produced mats were evaluated for their processing into composites as ‘fully consolidated mats’ and ‘non-consolidated’ as-produced mats. Comprehensive mechanical data in terms of tensile strength, tensile modulus and impact toughness for rCF C/PE, C/PA66 and C/PET are presented. The work is of high value to sustainable composite designers and modelers.

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Optimization of process parameters of recycled carbon fiber-reinforced thermoplastic prepared by the wet-laid hybrid nonwoven process

Cited by 9 publications

References 31 publications

Void content of polypropylene/carbon fiber wet‐laid nonwoven composites: Effect of fiber content and molding conditions, and void elimination mechanism

Void content of polypropylene/carbon fiber wet‐laid nonwoven composites: Effect of fiber content and molding conditions, and void elimination mechanism

Void content of PP/CF Wet-laid Nonwoven Composites: Effect of Fiber Content and Molding Conditions, and Void Elimination Mechanism

Mechanical Response and Processability of Wet-Laid Recycled Carbon Fiber PE, PA66 and PET Thermoplastic Composites

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