Improvement on strength and toughness for CFRPs by construction of novel “soft-rigid” interface layer

Pu, Yinchuan; Ma, Zhihui; Liu, Li; Bai, Yongping; Huang, Yudong

doi:10.1016/j.compositesb.2022.109846

Cited by 57 publications

(16 citation statements)

References 45 publications

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“…The surface contact angles of the polymer films were tested to verify the change of surface states before and after the spraying, where a tight and uniform distribution of nanosheets with smooth surface favors a smaller contact angle. [32][33][34] The proposed spray coating process was found to be suitable for polymer film with both hydrophobic and hydrophilic surfaces. As shown in Figure 1d and Figure S1 (Supporting Information), the commercial BOPP film has a hydrophobic surface with a contact angle of 101°, decreasing to 79°for BOPP-CN after nanosheets coating, indicating the surface hydrophilicity of the polymer film is improved by the coated nanosheets.…”

Section: Resultsmentioning

confidence: 99%

2D Nanosheet Spray Coating for Scalable Processing of High‐Energy‐Density Dielectric Polymer Films

Shi

Jiang

et al. 2023

Adv Elect Materials

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Dielectric film capacitors with high power density and rapid charge–discharge capability are widely used as key components in modern electronic and electrical systems, and polymers are primary dielectric for film capacitors due to their low cost, flexibility, and ease of processing. Here, a surface engineering approach is reported to improve the energy storage properties of polymer films by directly spray coating 2D nanosheets on the polymer film surface. The spraying of 2D calcium niobate nanosheets on the surface of biaxially oriented polypropylene (BOPP) films leads to remarkably increased breakdown strength and dielectric constant, resulting in a maximum 64% enhancement of energy density compared to the pristine BOPP films. Ultraviolet irradiation is further employed to improve the adhesion of nanosheets to the BOPP film surface, leading to an ultrahigh energy density of 11.6 J cm−3 with a high energy efficiency of 90%, which is the highest energy density ever achieved in polypropylene‐based films. This work provides a universal, cost‐effective, and scalable approach to improve the energy density of dielectric polymer films, which is of great significance for the application of high‐energy‐density polymer films in compact and efficient power systems.

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Section: Resultsmentioning

confidence: 99%

2D Nanosheet Spray Coating for Scalable Processing of High‐Energy‐Density Dielectric Polymer Films

Shi

Jiang

et al. 2023

Adv Elect Materials

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“…It is due to the disruption of the regular triazine ring of BADCy resin caused by excess addition of pre FABPBO, which reduces the interfacial action between FABPBO‐BADCy matrix and PBO fibers, thus reducing the single fiber pull‐out strength. [ 43 ] Meanwhile, compared with the previous works, FABPBO‐BADCy (5 wt%) prepared in this work presents the optimal wave‐transparent performances, mechanical properties, heat resistances, and interfacial compatibility with PBO fibers (Figure 3i).…”

Section: Resultsmentioning

confidence: 61%

Branched Fluorine/Adamantane Interfacial Compatibilizer for PBO Fibers/Cyanate Ester Wave‐Transparent Laminated Composites

et al. 2023

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Branched fluorine/adamantane PBO precursor (preFABPBO), synthesized via random co-condensation between 2,2-bis(3-amino-4-hydroxyphenyl)hexafluoro propane, 1,3-adamantanedicarbonyl dichloride, and trimesoyl chloride, is performed as interfacial compatibilizer, bisphenol A dicyanate ester (BADCy) resin as polymer matrix, and poly(p-phenylene-2,6-benzobisoxazole) (PBO) fibers as reinforcements to prepare PBO fibers/FABPBO-BADCy wave-transparent laminated composites by high temperature molding. The mechanical properties, wave-transparent performances, and heat resistances of PBO fibers/BADCy composites are simultaneously improved by the addition of preFABPBO. The interlaminar shear strength (ILSS) and flexural strength of PBO fibers/FABPBO-BADCy composites are 48.9 and 665.3 MPa, respectively, increased by 33.2% and 13.3% compared to those of PBO fibers/BADCy composites (36.7 and 587.4 MPa). The dielectric constant and dielectric loss values at 10 6 Hz are 2.53 and 0.003, respectively, lower than those of PBO fibers/BADCy composites (3.06 and 0.006), and the corresponding wave transmission efficiency is 94.8%, which also presents excellent stability over the wide temperature (25-200 °C ) and frequency range (10 3 -10 7 Hz and 8.2-12.4 GHz). Meanwhile, the heat resistance index and glass transition temperature are 229.9 °C and 247.5 °C , also better than those of PBO fibers/BADCy composites (229.6 °C and 247.1 °C ).

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“…Meanwhile, the interface acts as a bridge and link of stress transfer between the ber and resin, which largely affects the properties of CF/EP [3,4]. However, there is a weak interface in CF/EP composites due to the pristine carbon ber surface is chemical inertia and smooth, which results in the premature failure of CF/EP and restricts the application [5][6][7][8]. Therefore, how to gain a good interphase in CF/EP composites is fundamentally important and interesting.…”

Section: Introductionmentioning

confidence: 99%

Carbon fiber‐reinforced epoxy composite properties improvement by incorporation of polydopamine sizing at fiber–matrix interface

et al. 2023

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To gain better interfacial and mechanical performances of carbon ber reinforced epoxy resin (CF/EP) composites, the surface modi cation of CF was carried out via a simple mild method. The polydopamine (PDA) was applied to size the CF, as well as the in uence of PDA sizing time on CF were elucidated. As the PDA deposited time increases, a growing number of PDA nanoparticles were adhered on CF surface, associating with appearance of PDA agglomerates. Through analyzing the results, the optimum PDA sized time was 24 h. The introduction of PDA increase the chemical reaction and mechanical interlocking between ber and matrix. Compared with unsized CF, the tensile strength of PDA 24 h sized CF was improved by 27.0%, the interlaminar shear strength, exural and impact strength of PDA 24 h sized CF/EP composites increased by 103.7%, 65.6% and 163.6%, respectively. Furthermore, the fracture topographies of CF/EP composite strikingly implied that the PDA has a positive impact on the mechanical performances of CF/EP composites.

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Improvement on strength and toughness for CFRPs by construction of novel “soft-rigid” interface layer

Cited by 57 publications

References 45 publications

2D Nanosheet Spray Coating for Scalable Processing of High‐Energy‐Density Dielectric Polymer Films

2D Nanosheet Spray Coating for Scalable Processing of High‐Energy‐Density Dielectric Polymer Films

Branched Fluorine/Adamantane Interfacial Compatibilizer for PBO Fibers/Cyanate Ester Wave‐Transparent Laminated Composites

Carbon fiber‐reinforced epoxy composite properties improvement by incorporation of polydopamine sizing at fiber–matrix interface

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