Harry Allcock

About

Shabnam Akhtari is a professor at Pennsylvania State University, based in the McAllister Building. Her research interests include Number Theory, Geometry of Numbers, and Diophantine Analysis. Her work focuses on these areas within mathematics, contributing to the understanding of number theoretic problems and geometric methods in number theory.

Research topics

• Nanotechnology
• Materials science
• Chemistry
• Polymer science
• Polymer chemistry
• Organic chemistry
• Biomedical engineering
• Engineering

Selected publications

• Polyphosphazenes: Phosphorus in Inorganic–Organic Polymers

  The Journal of Organic Chemistry · 2020 · 56 citations

  1st authorCorresponding

  Although the best-known examples of synthetic polymers are derived from carbon-based monomers, there exists another large and growing family of macromolecules based on the chemistry of phosphorus. These are the poly(organophosphazenes): polymers with a backbone of alternating phosphorus and nitrogen atoms and with two organic side groups attached to each phosphorus. The methods of synthesis of these polymers allow access to property combinations not found in all-organic counterparts, and this pr…

  PublisherDOI

• Inhibition of bacterial adhesion and biofilm formation by a textured fluorinated alkoxyphosphazene surface

  Bioactive Materials · 2020-09-08 · 39 citations

  articleOpen access

  The utilization of biomaterials in implanted blood-contacting medical devices often induces a persistent problem of microbial infection, which results from bacterial adhesion and biofilm formation on the surface of biomaterials. In this research, we developed new fluorinated alkoxyphosphazene materials, specifically poly[bis(octafluoropentoxy) phosphazene] (OFP) and crosslinkable OFP (X–OFP), with improved mechanical properties, and further modified the surface topography with ordered pillars to…

  PublisherDOI

• Polyphosphazene polymers: The next generation of biomaterials for regenerative engineering and therapeutic drug delivery

  Journal of Vacuum Science & Technology B Nanotechnology and Microelectronics Materials Processing Measurement and Phenomena · 2020 · 38 citations

  The demand for new biomaterials in several biomedical applications, such as regenerative engineering and drug delivery, has increased over the past two decades due to emerging technological advances in biomedicine. Degradable polymeric biomaterials continue to play a significant role as scaffolding materials and drug devices. Polyphosphazene platform is a subject of broad interest, as it presents an avenue for attaining versatile polymeric materials with excellent structure and property tunabili…

  PublisherOA PDFDOI

• Polyphosphazene Elastomers with Alkoxy and Trifluoroethoxy Side Groups

  ACS Applied Polymer Materials · 2020-01-10 · 26 citations

  articleSenior authorCorresponding

  Elastomers based on the polyphosphazene skeletal platform are the subject of broad interest from both biomedical and technological viewpoints. Here, we describe a fourth generation of polyphosphazene elastomers with both 2,2,2-trifluoroethoxy (CF3CH2O−) and nonfluorinated alkoxy groups such as CH3CH2O–, CH3CH2CH2O–, or CH3CH2CH2CH2O– units. These structures provided access to elastomers with very low glass transition temperatures in the range of −60 to −90 °C. Variations in the relative percenta…

  PublisherDOI

• A Regenerative Polymer Blend Composed of Glycylglycine Ethyl Ester-Substituted Polyphosphazene and Poly(lactic-<i>co</i>-glycolic acid)

  ACS Applied Polymer Materials · 2020-01-08 · 25 citations

  articleOpen access

  In the pursuit of continuous improvement in the area of biomaterial design, blends of mixed-substituent polyphosphazenes and poly(lactic acid–glycolic acid) (PLGA) were prepared, and their morphology of phase distributions for the first time was studied. The degradation mechanism and osteocompatibility of the blends were also evaluated for their use as regenerative materials. Poly[(ethylphenylalanato)25(glycine ethylglycinato)75phosphazene] (PNEPAGEG) and poly[(glycine ethylglycinato)75(phenylph…

  PublisherOA PDFDOI

Recent grants

• NIH Grant R01HL011418

  NIH · $845k · 1991

Frequent coauthors

• Cato T. Laurencin

  California Institute for Regenerative Medicine

  137 shared

• Lakshmi S. Nair

  California Institute for Regenerative Medicine

  76 shared

• Masood Parvez

  Ibrahim Cardiac Hospital & Research Institute

  55 shared

• Nicholas R. Krogman

  Pennsylvania State University

  52 shared

• Ian Manners

  39 shared

• Paul W. Brown

  Pfizer (United States)

  34 shared

• Mark D. Hindenlang

  DEVCOM Army Research Laboratory

  34 shared

• Robert R. Whittle

  31 shared

Labs

• Allcock GroupPI

Awards & honors

• International Award of the Polymer Society of Japan (2017)
• Elected to the National Academy of Engineering (2014)
• American Chemical Society Paul Flory Award in Polymer Educat…
• American Chemical Society National Award in Applied Polymer…
• Honorary degree from Loughborough University of Technology,…

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