This readme.txt file was generated on 2022-12-12
Recommended citation for the data: Neal, Christopher A P; Leon, Valeria; Quan, Michelle C; Chibambo, Nondumiso O; Calabrese, Michelle A. (2022). Supporting data for Tuning the thermodynamic, optical, and rheological properties of thermoresponsive polymer solutions via silica nanoparticle shape and concentration. Retrieved from the Data Repository for the University of Minnesota, https://doi.org/10.13020/5s96-n086
-------------------
GENERAL INFORMATION
-------------------
1. Title of Dataset: Supporting data for Tuning the thermodynamic, optical, and rheological properties of thermoresponsive polymer solutions via silica nanoparticle shape and concentration
2. Author Information
Author Contact: Christopher A P Neal (c-neal@umn.edu)
Principal Investigator Contact Information
Name: Michelle A. Calabrese
Institution: University of Minnesota
Address: Department of Chemical Engineering and Materials Science, University of Minnesota Twin Cities, Minneapolis, MN 55455, United States
Email: mcalab@umn.edu
ORCID: https://orcid.org/0000-0003-4577-6999
Associate or Co-investigator Contact information
Name: Christopher A. P. Neal
Institution: University of Minnesota
Address: Department of Chemical Engineering and Materials Science, University of Minnesota Twin Cities, Minneapolis, MN 55455, United States
Email: c-neal@umn.edu
ORCID: https://orcid.org/0000-0002-7807-2691
Associate or Co-investigator Contact Information
Name: Valeria León
Institution: The University of Texas Rio Grande Valley
Address: Mechanical Engineering Department, The University of Texas Rio Grande Valley, Edinburg, TX 78539, United States
Email: valeria.leon01@utrgv.edu
ORCID:
Associate or Co-investigator Contact Information
Name: Michelle C. Quan
Institution: University of Minnesota
Address: Department of Chemical Engineering and Materials Science, University of Minnesota Twin Cities, Minneapolis, MN 55455, United States
Email: quanx065@umn.edu
ORCID:
Associate or Co-investigator Contact Information
Name: Nondumiso O. Chibambo
Institution: University of Minnesota
Address: Department of Chemical Engineering and Materials Science, University of Minnesota Twin Cities, Minneapolis, MN 55455, United States
Email: chiba010@umn.edu
ORCID:
3. Date published or finalized for release: 2022-12-08
4. Date of data collection (single date, range, approximate date): 2021-05-01 to 2022-08-01
5. Geographic location of data collection (where was data collected?): University of Minnesota
6. Information about funding sources that supported the collection of the data:
Office of the Vice President of Research, College of Science and Engineering, and the Department of Chemistry at the University of Minnesota.
Office of the Director, National Institutes of Health, [Award Number S10OD011952]
Anton Paar VIP program
Office of the Vice President of Research, College of Science and Engineering, and the Department of Chemistry at the University of Minnesota
This work was supported partially by the Partnership for Research and Education in Materials (PREM) Program of the National Science Foundation under Award Number DMR-2122178, and through the University of Minnesota MRSEC under Award Number DMR-2011401
Office of the Vice President for Research, the Medical School, the College of Biological Science, NIH, NSF, and the Minnesota Medical Foundation
7. Overview of the data (abstract):
Hypothesis
The shape and quantity of hydrophilic silica nanoparticles (NPs) can be used to tune the microstructure, rheology, and stability of phase-separating polymer solutions. In thermoresponsive polymer systems, silica nanospheres are well-studied whereas anisotropic NPs have little literature precedent. Here, we hypothesize that NP shape and concentration lower the onset of rheological and turbidimetric separation of aqueous poly(N-isopropyl acrylamide) (PNIPAM) solutions.
Experiments Differential scanning calorimetry (DSC), Fourier-transform infrared spectroscopy (FTIR), turbidimetry, and oscillatory rheology are utilized to examine interactions between NPs, PNIPAM, and water and to track changes in phase separation and mechanical properties due to NP concentration and shape.
Findings NP addition reduces phase separation enthalpy due to PNIPAM-NP hydrogen bonding interactions, the degree to which depends on polymer content. While NP addition minorly impacts thermodynamic and optical properties, rheological transitions and associated rheological properties are dramatically altered with increasing temperature, and depend on NP quantity, shape, and polymer molecular weight. Thus NP content and shape can be used to finely tune transition temperatures and mechanical properties for applications in stimuli-responsive materials.
--------------------------
SHARING/ACCESS INFORMATION
--------------------------
1. Licenses/restrictions placed on the data: CC0 1.0 Universal (http://creativecommons.org/publicdomain/zero/1.0/)
2. Links to publications that cite or use the data:
https://doi.org/10.1016/j.jcis.2022.08.139
3. Was data derived from another source?
If yes, list source(s):
4. Terms of Use: Data Repository for the U of Minnesota (DRUM) By using these files, users agree to the Terms of Use. https://conservancy.umn.edu/pages/drum/policies/#terms-of-use
---------------------
DATA & FILE OVERVIEW
---------------------
File List
Filename: Raw_DSC.zip
Short description: Raw differential scanning calorimetry data with embedded description of data
Filename: Raw_FTIR.zip
Short description: Raw Fourier-Transform infrared spectroscopy data with embedded description of data
Filename: Raw_Rheology.zip
Short description: Raw rheology data with embedded description of data
Filename: Raw_SEM.zip
Short description: Raw scanning electron microscopy data with embedded description of data
Filename: Raw_TGA.zip
Short description: Raw thermogravimetry data with embedded description of data
Filename: Raw_Turbidimetry.zip
Short description: Raw turbidimetry data with embedded description of data
2. Relationship between files:
The folders are split up by instrument used for the datafile contained inside it. For instance, all files under "Raw_DSC.zip" were differential scanning calorimetry (DSC) file types for different samples. All files under "Raw_FTIR.zip" were Fourier-transform infrared spectroscopy (FTIR) file types for different samples. All files under "Raw_Rheology.zip" were rheology file types for different samples. All files under "Raw_SEM.zip" were scanning electron micrograph (SEM) image file types for different samples. All files under "Raw_TGA.zip" were thermogravimetric analysis (TGA) file types for different samples. All files under "Raw_turbidimetry.zip" were light transmittance vs. temperature (turbidimetry) file types for different samples. The same samples were run on multiple instruments; they are similar samples tested multiple ways.
--------------------------
METHODOLOGICAL INFORMATION
--------------------------
Methods for each zip folder can be found in the folder's specific README.
-----------------------------------------
DATA-SPECIFIC INFORMATION FOR: Raw_DSC.zip
-----------------------------------------
1. Number of variables: 2 relevant variables: Temperature and Heat flow
2. Number of cases/rows:
3. Variable List
A. Name: Temperature
Description: The temperature at which the sample is held, in Celsius
B. Name: Heat Flow
Description: The heat, in mW, required to change the sample temperature to its current value from the previous value
-----------------------------------------
DATA-SPECIFIC INFORMATION FOR: Raw_FTIR.zip
-----------------------------------------
1. Number of variables: 2 relevant variables: wavenumber and intensity
2. Number of cases/rows:
3. Variable List
A. Name: wavenumber
Description: The wavenumber of incident light, in units of inverse cm
B. Name: intensity
Description: The light intensity absorbed by the sample at the given wavenumber in arbitrary units
-----------------------------------------
DATA-SPECIFIC INFORMATION FOR: Raw_Rheology.zip
-----------------------------------------
1. Number of variables: 2 relevant variables: wavenumber and intensity
2. Number of cases/rows:
3. Variable List
A. Name: wavenumber
Description: The wavenumber of incident light, in units of inverse cm
B. Name: intensity
Description: The light intensity absorbed by the sample at the given wavenumber in arbitrary units
-----------------------------------------
DATA-SPECIFIC INFORMATION FOR: Raw_SEM.zip
-----------------------------------------
1. Number of variables:
2. Number of cases/rows:
3. Missing data codes:
Code/symbol Definition
Code/symbol Definition
4. Variable List
A. Name: <variable name>
Description: <description of the variable>
Value labels if appropriate
B. Name: <variable name>
Description: <description of the variable>
Value labels if appropriate
-----------------------------------------
DATA-SPECIFIC INFORMATION FOR: Raw_TGA.zip
-----------------------------------------
1. Number of variables: 2 relevant variables: Temperature and Mass
2. Number of cases/rows:
3. Variable List
Temperature (Tr) listed in degrees Celsius
Sample mass (Value) listed in mg
-----------------------------------------
DATA-SPECIFIC INFORMATION FOR: Raw_Turbidimetry.zip
-----------------------------------------
1. Number of variables: 2 relevant variables: Temperature and transmittance
2. Number of cases/rows:
3. Variable List
A. Name: Temperature
Description: The temperature at which the sample is held, in Celsius
B. Name: Transmittance
Description: The light transmittance, in arbitrary units out of 1000, passing through the sample