Special Issue "Surface Modification of Halloysite Nanotubes"

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Nanotechnology and Applied Nanosciences".

Deadline for manuscript submissions: 30 September 2017

Special Issue Editor

Guest Editor
Prof. Dr. David K. Mills

School of Biological Sciences and the Center for Biomedical Engineering and Rehabilitation Science, Louisiana Tech University, Carson Taylor Hall, Room 128, Ruston, LA 71272, USA
Website | E-Mail
Interests: designing biodegradable and bioactive nanofilms and coatings for cell adhesion, differentiation and functionality; polymer scaffolds for dental and orthopedic implants; application of nanoscale topographic and chemical cues for controlling osteogenesis; 3D printing of biomedical devices and implants, drug delivery, and bioengineering TMJ tissues for repair or regeneration

Special Issue Information

Dear Colleagues,

This Special Issue highlights the current state and future prospects of a biocompatible, green, inexpensive and multifunctional clay nanoparticle. Halloysite nanotubes (HNTs) have shown to be an ideal nanoparticle for polymer reinforcement, sustained-release drug delivery, nanoreactor synthesis, and use as substrate material for nanostructured coatings. A number of methods exist on surface modification of HNTs with polyelectrolytes, polysaccharides, polymers, metals and resins. The current state-of-the-art shows a collection of technologies that use simple or multi-step chemical reactions to modify the HNT surface. Functionalized HNTs can then be applied directly for, or combined with, polymers to produce nanocomposites for use in a diverse array of biomedical applications including antimicrobial, drug delivery, regenerative medicine or tissue repair. Contributions will focus on techniques that impart specific functionalities to HNT nanotubes (HNTs) that may include increased surface area for cell penetration; drug delivery, alteration of surface pH, polymer integration, and slow release mechanisms among others.

Prof. Dr. David K. Mills
Guest Editor

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1200 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Drug release;
  • Halloysite nanotubes;
  • Functionalization;
  • Polyelectrolyte;
  • Polymer, surface modification

Published Papers (2 papers)

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Research

Open AccessArticle Improvement of Interfacial Adhesion of Incorporated Halloysite-Nanotubes in Fiber-Reinforced Epoxy-Based Composites
Appl. Sci. 2017, 7(5), 441; doi:10.3390/app7050441
Received: 20 February 2017 / Revised: 10 April 2017 / Accepted: 22 April 2017 / Published: 27 April 2017
PDF Full-text (3589 KB) | HTML Full-text | XML Full-text
Abstract
The heart of composite materials depends on the characteristics of their interface. The physical properties of composite materials are often described by the rule of mixtures, representing the average physical properties of the reinforcement and the matrix resin. However, in practical applications there
[...] Read more.
The heart of composite materials depends on the characteristics of their interface. The physical properties of composite materials are often described by the rule of mixtures, representing the average physical properties of the reinforcement and the matrix resin. However, in practical applications there are situations which arise where the rule of mixtures is not followed. This is because when an external energy applied to the composite material is transferred from the matrix to the reinforcement, the final physical properties are affected by the interface between them rather than the intrinsic properties of both the reinforcement and the matrix. The internal bonding strength of the interface of these composites can be enhanced by enhancing the bonding strength by adding a small amount of material at the interface. In this study, the mechanical properties were evaluated by producing a carbon fiber-reinforced composite material and improved by dispersing halloysite nanotubes (HNTs) and the epoxy resin using an ultrasonic homogenizer. The interfacial bond strength increased with the addition of HNT. On the other hand, the addition of HNTs more than 3 wt % did not show the reinforcing effect by HNT agglomeration. Full article
(This article belongs to the Special Issue Surface Modification of Halloysite Nanotubes)
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Open AccessArticle Surface Improvement of Halloysite Nanotubes
Appl. Sci. 2017, 7(3), 291; doi:10.3390/app7030291
Received: 30 December 2016 / Revised: 14 February 2017 / Accepted: 24 February 2017 / Published: 16 March 2017
Cited by 2 | PDF Full-text (1256 KB) | HTML Full-text | XML Full-text
Abstract
A novel development on halloysite-polyvinyl alcohol (HNTs-PVA) nanocomposites has been conducted using malonic acid (MA) by crosslinking PVA and HNTs. PVA-MA crosslinking produces smooth surfaces, which play an important role in enhancing the properties of HNTs-PVA nanocomposite. The crystallographic structures of crosslinked HNTs-PVA
[...] Read more.
A novel development on halloysite-polyvinyl alcohol (HNTs-PVA) nanocomposites has been conducted using malonic acid (MA) by crosslinking PVA and HNTs. PVA-MA crosslinking produces smooth surfaces, which play an important role in enhancing the properties of HNTs-PVA nanocomposite. The crystallographic structures of crosslinked HNTs-PVA show almost no change as depicted by the X-ray diffraction (XRD)-2θ-peak, suggesting that MA has no or little influence on the crystallographic structure of the HNTs-PVA. Images taken by field emission scanning electron microscope (FESEM) suggest possible effects of MA on the morphology and internal features of HNTs-PVA by reducing the agglomeration of HNTs, which is considered a decisive step in improving the surface qualities of HNTs. Investigating the samples using the Brunauer–Emmelt–Teller (BET) technique showed that the surface area was increased by about 10 times, reaching the second highest recorded results compared to the HNTs, which could be considered a breakthrough step in enhancing the properties of HNTs-PVA due to MA crosslinking. Full article
(This article belongs to the Special Issue Surface Modification of Halloysite Nanotubes)
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Figure 1

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