Concentration Polarization Enabled Reactive Coating of Nanofiltration Membranes with Zwitterionic Hydrogel

Round 1

Reviewer 1 Report

The manuscript title “Concentration polarization enabled reactive coating of nanofiltration membranes with zwitterionic hydrogel” reported by May et al. the fabrication of surface-selective hydrogel coating using zwitterionic cross-linkable macromolecules as building blocks. The as prepared membrane was examined the different analytical techniques. Then the membrane was performed the salt rejection studies of nanofiltration. I suggested comments below:

1. I didn’t see any specific results in abstract selection. the authors remove line 10 “a novel” in abstract part. Should be rewrite in the abstract shown important information and results only presents.
2. Could you explain the simple way of polymerization selection?
3. 3. polymerization characterization; this selection writing to long, could you short writing is better than the present format.
4. 5.1. selection; equation (3) and (4) both same performance, could you rewrite it common equation.
5. Should you explain the difference between Figure 7, 8 and Figure 10.
6. the authors once again check Figure 9.
7. Figure 11; figure caption is not clearly, should be rewrite clearly. Overall the figure caption checks carefully in the manuscript.
8. I didn’t see the dense layer of thickness depend on the deposition during time.
9. I didn’t see the any specific results.
10. Should be comparted pervious reported article.
11. The journal format is not fit, still have same problem.
12. Should be shown the BSA rejection performance.
13. I didn’t see the any stability studies. How to say a wider range of industrially attractive applications of membrane?
14. The manuscript have a typo error or mistake.

Author Response

see attached file.

Author Response File: Author Response.docx

Reviewer 2 Report

In the manuscript "Concentration polarization enabled reactive coating of nanofiltration membranes with zwitterionic hydrogel," the Authors report the bottleneck challenge of membrane fouling is addressed via establishing a scalable concentration polarization (CP) enabled and surface-selective hydrogel coating using zwitterionic cross-linkable macromolecules as building blocks.

This article is interesting. However, there are some general points in the text which need to addressed before publication:

1. Materials and Methods section (page 5 lines 321-327) needs improvement – too short description of the zeta potential measurements. How many measurements for each pH were made? What is its repeatability?
2. Figure 6 (page 14), Figure 12 (page 20), Figure 13 (page 21) and Figure 14 (page 23) - What are the error bars of the obtained experimental values? Were presented in these Figures experiments carried out only once?

Author Response

see attached file

Author Response File: Author Response.docx

Round 2

Reviewer 1 Report

The authors have responded the comments.