Next Article in Journal
Polymerization Shrinkage Evaluation of Restorative Resin-Based Composites Using Fiber Bragg Grating Sensors
Next Article in Special Issue
Preparation and Thermal Evaluation of Novel Polyimide Protective Coatings for Quartz Capillary Chromatographic Columns Operated over 320 °C for High-Temperature Gas Chromatography Analysis
Previous Article in Journal
Influence of Oxidation Level of Graphene Oxide on the Mechanical Performance and Photo-Oxidation Resistance of a Polyamide 6
Previous Article in Special Issue
Thermal Analysis of Crystallization and Phase Transition in Novel Polyethylene Glycol Grafted Butene-1 Copolymers
 
 
Article
Peer-Review Record

Crosslinking Effect on Thermal Conductivity of Electrospun Poly(acrylic acid) Nanofibers

Polymers 2019, 11(5), 858; https://doi.org/10.3390/polym11050858
by Yeongcheol Park 1, Suyeong Lee 1, Sung Soo Ha 2, Bernard Alunda 3, Do Young Noh 4, Yong Joong Lee 3, Sangwon Kim 5 and Jae Hun Seol 1,*
Reviewer 1: Anonymous
Reviewer 2: Anonymous
Polymers 2019, 11(5), 858; https://doi.org/10.3390/polym11050858
Submission received: 19 April 2019 / Revised: 8 May 2019 / Accepted: 9 May 2019 / Published: 10 May 2019
(This article belongs to the Special Issue Thermal Properties and Applications of Polymers II)

Round 1

Reviewer 1 Report

In this manuscript, the authors have carefully investigated the effects of electrospinning voltage, thermal annealing, and crosslinking on thermal conductivity of PAA nanofibers. Various techniques have been utilized to characterize bonding and structure of as-spun and crosslinked PAA nanofibers. The study offers valuable insights on the effect of crosslinking on the structure and thermal conductivity of PAA nanofibers. I will be happy to recommend it for publication after minor revision.

I have a few comments for the authors' consideration:

The diameter of PAA nanofibers studied in this work is relatively large (152-402 nm). Have the authors considered the effect of contact thermal resistance on thermal conductance measurement?

The insert of Figure 5 is not clear. The quality of the figure should be enhanced.

Page 5, Line 190-195, "It was not possible to observe..." The same sentence appears twice.

Author Response

Please see the attached file. 




Author Response File: Author Response.docx

Reviewer 2 Report

The manuscript of Seol et al. deals with trials to increase the thermal conductivity of poly (acrylic acid) (PAA) nanofibers, which were generated by elektrospinning.

In particular, the influence of crosslinking and spinning voltage on the thermal conductivity of PAA electrospun nanofibers was investigated in detail.  

The authors could show that there is an optimal voltages to achieve an improved thermal conductivity. The alignment of the CH and CH2 groups inside the fibers (trans or gauche) as well the free chain length were identified as relevant determining factors. To determine the ratio between both conformations the infrared spectra and Raman spectra of the fibers were analyzed thoroughly. A high content of trans conformations was found to increase the thermal conductivity, but crosslinking strongly deteriorated the thermal conductivity.

The manuscript is well written including introduction, description of experimental set-up used for thermal conductivity measurements, conduction of measurements, discussions of results and conclusion part. Due to the interesting results I recommend the presented manuscript for publication in Polymers.  

Only following alterations are necessary before publication:

Page 5, lines 190-195: the following sentence exists two-times: “It was not possible to observe the melting processes of the as-spun PAA NFs due to precedence of the crosslinking.”

Page 10, Figure 8:  The assignment of the different triangles and squares to the k values of several samples (as-spun, bulk, cross-linked) is hardly possible. Please supplement the caption of Fig. 8 accordingly.


Author Response

Please see the attached file.

Author Response File: Author Response.docx

Back to TopTop