Impact of Interfacial Roughness on the Sorption Properties of Nanocast Polymers

Sridhar, Manasa; Gunugunuri, Krishna R.; Hu, Naiping; Motahari, Ahmad; Zuo, Xiaobing; Schaefer, Dale W.; Thiel, Stephen W.; Smirniotis, Panagiotis G.

doi:10.1021/acs.macromol.6b00304

Title: Impact of Interfacial Roughness on the Sorption Properties of Nanocast Polymers

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Abstract

Nanocasting is an emerging method to prepare organic polymers with regular, nanometer pores using inorganic templates. This report assesses the impact of imperfect template replication on the sorption properties of such polymer castings. Existing X-ray diffraction data show that substantial diffuse scattering exists in the small-angle region even though TEM images show near perfect lattices of uniform pores. To assess the origin of the diffuse scattering, the morphology of the phenol - formaldehyde foams (PFF) was investigated by small-angle X-ray scattering (SAXS). The observed diffuse scattering is attributed to interfacial roughness due to fractal structures. Such roughness has a profound impact on the sorption properties. Conventional pore- filling models, for example, overestimate protein sorption capacity. A mathematical framework is presented to calculate sorption properties based on observed morphological parameters. The formalism uses the surface fractal dimension determined by SAXS in conjunction with nitrogen adsorption isotherms to predict lysozyme sorption. The results are consistent with measured lysozyme loading.

Authors:

Sridhar, Manasa ^[1]; Gunugunuri, Krishna R. ^[1]; Hu, Naiping ^[1]; Motahari, Ahmad ^[1]; Zuo, Xiaobing ^[2]; Schaefer, Dale W. ^[1]; Thiel, Stephen W. ^[1]; Smirniotis, Panagiotis G. ^[1]

Univ. of Cincinnati, OH (United States)
Argonne National Lab. (ANL), Argonne, IL (United States)

Publication Date:: Wed Mar 16 00:00:00 EDT 2016

Research Org.:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1339562

Grant/Contract Number:: AC02-06CH11357

Resource Type:: Accepted Manuscript

Journal Name:: Macromolecules

Additional Journal Information:: Journal Volume: 49; Journal Issue: 7; Journal ID: ISSN 0024-9297

Publisher:: American Chemical Society

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    Sridhar, Manasa, Gunugunuri, Krishna R., Hu, Naiping, Motahari, Ahmad, Zuo, Xiaobing, Schaefer, Dale W., Thiel, Stephen W., and Smirniotis, Panagiotis G. Impact of Interfacial Roughness on the Sorption Properties of Nanocast Polymers.  United States: N. p., 2016. 
Web.  doi:10.1021/acs.macromol.6b00304.

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                    Sridhar, Manasa, Gunugunuri, Krishna R., Hu, Naiping, Motahari, Ahmad, Zuo, Xiaobing, Schaefer, Dale W., Thiel, Stephen W., & Smirniotis, Panagiotis G. Impact of Interfacial Roughness on the Sorption Properties of Nanocast Polymers.  United States.  https://doi.org/10.1021/acs.macromol.6b00304

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                    Sridhar, Manasa, Gunugunuri, Krishna R., Hu, Naiping, Motahari, Ahmad, Zuo, Xiaobing, Schaefer, Dale W., Thiel, Stephen W., and Smirniotis, Panagiotis G. Wed .  
"Impact of Interfacial Roughness on the Sorption Properties of Nanocast Polymers".  United States.  https://doi.org/10.1021/acs.macromol.6b00304.  https://www.osti.gov/servlets/purl/1339562.

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@article{osti_1339562,

  title        = {Impact of Interfacial Roughness on the Sorption Properties of Nanocast Polymers},

  author       = {Sridhar, Manasa and Gunugunuri, Krishna R. and Hu, Naiping and Motahari, Ahmad and Zuo, Xiaobing and Schaefer, Dale W. and Thiel, Stephen W. and Smirniotis, Panagiotis G.},

  abstractNote = {Nanocasting is an emerging method to prepare organic polymers with regular, nanometer pores using inorganic templates. This report assesses the impact of imperfect template replication on the sorption properties of such polymer castings. Existing X-ray diffraction data show that substantial diffuse scattering exists in the small-angle region even though TEM images show near perfect lattices of uniform pores. To assess the origin of the diffuse scattering, the morphology of the phenol - formaldehyde foams (PFF) was investigated by small-angle X-ray scattering (SAXS). The observed diffuse scattering is attributed to interfacial roughness due to fractal structures. Such roughness has a profound impact on the sorption properties. Conventional pore- filling models, for example, overestimate protein sorption capacity. A mathematical framework is presented to calculate sorption properties based on observed morphological parameters. The formalism uses the surface fractal dimension determined by SAXS in conjunction with nitrogen adsorption isotherms to predict lysozyme sorption. The results are consistent with measured lysozyme loading.},

  doi          = {10.1021/acs.macromol.6b00304},

  journal      = {Macromolecules},

  number       = 7,

  volume       = 49,

  place        = {United States},

  year         = {Wed Mar 16 00:00:00 EDT 2016},

  month        = {Wed Mar 16 00:00:00 EDT 2016}

}

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