Preparation and Heat Dissipation Performance of Vertical Graphene Nanosheets/Carbon Fibers Composite Film

Round 1

Reviewer 1 Report

Preparation and heat dissipation performance of vertical graphene nanosheets/carbon fibers composite film

The authors prepared a new type of VGNs/CF composite films with graphene derivatives and investigated their thermal properties. The obtained values are high. I can recommend the paper for acceptance after the authors made the changes indicated below.

1) “The through-plane thermal conductivity of the VGNs/CF composite film could reach 17.745 W/(m·K), and the addition of CF significantly improved the heat dissipation performance of the composite film compared with the pure VGNs film (13.904 W/(m·K)).” There are no methods of measuring the thermal conductivity of such samples with the accuracy that can justify 3 digits after the decimal. The results should be rounded to ~17.7 W/mK and 13.9 W/mK.

2) To give the readers some background and place the present paper into the general thermal context, in the Introduction, provide references to some recent reviews that give a summary of graphene composites work. The relevant literature from the google search is:  Y. Fu, et al., “Graphene related materials for thermal management,” 2D Mater., 7, 012001, 2019; “Phononics of graphene and related materials,” ACS Nano, 14, pp. 5170-5178, 2020; J. S. Lewis, et al., “Thermal interface materials with graphene fillers: a review of the state of the art and outlook for future applications” Nanotechnology, 31, 142003, 2021; "Graphene Thermal Interface Materials - State-of-the-Art and Application Prospects" IEEE Open J. Nanotechnol., 3, 169-181, 2022.

3) Typically, the amount of fillers in thermal composites is characterized by the filler loading fraction. What would be the effective loading in the reported composites? 

Author Response

Thank you very much for your positive comments on our manuscript and provide the professional suggestions and comments for further improving the manuscript. According to your comments and suggestions, the manuscript has been carefully revised, and the main revisions and point-to-point response are listed as below.

Author Response File: Author Response.docx

Reviewer 2 Report

Herein, the author has investigated a novel vertical graphene nanosheets/carbon fibers (VGNs/CF) composite film with vertically oriented structure and excellent heat dissipation property fabricated on the stainless steel substrate by a facile thermochemical growth method. The preparation of composite film is green, safe and highly efficient. The through-plane thermal conductivity of the VGNs/CF composite film could reach 17.745 W/(m·K), and the addition of CF significantly improved the heat dissipation performance of the composite film compared with the pure VGNs film (13.904 W/(m·K)). I must say that the author has done appreciable and hard work to conduct this research but still, there is room for improvement, thus, I would suggest a minor revision of the manuscript to improve the quality of the article for its possible publication in this reputed journal. Kindly find my comments below:

1.     In the current state, the introduction lacks originality and must be expanded with the inclusion of recent literature and must state why there is a need to conduct this experiment and what is the contribution toward society or the industrial sector.

2.     Discuss more about VGNs film preparations with recent literature support in the introduction.

3.     Elaborate more about the synthesis method by showing some schemes or figures.

4.     The findings about FTIR analysis must be provided, what is the role of attained moieties in specific observation?

5.     Figure 6 should be revised with proper deliberation of real sample preparation attained pictures.

6.     Why such a trend in Figure 7a? Kindly provide proper justification.

 

7.     References need to be revised and check. The author is suggested to add literature in the article: Coatings 12, no. 10 (2022): 1459, https://doi.org/10.3390/coatings12101459; Process Safety and Environmental Protection 161 (2022): 801-818, https://doi.org/10.1016/j.psep.2022.03.082

Author Response

Thank you very much for your positive comments on our manuscript and provide the professional suggestions and comments for further improving the manuscript. According to your comments and suggestions, the manuscript has been carefully revised, and the main revisions and point-to-point response are listed as below.

Author Response File: Author Response.docx