Unusual, Promoted Release of Guests from Amphiphilic Cross-Linked Polymer Networks

Abstract

Hyperbranched fluoropolymer-poly(ethylene glycol) (HBFP-PEG) cross-linked networks have been found to exhibit capabilities for the encapsulation of high levels of geraniol guest molecules coupled with unusually rapid release of the volatile compound. The promotion of the release of the volatile fragrance geraniol, observed as decreasing volatilization temperatures and increasing volatilization rates by thermogravimetric analyses, was found to be dependent upon the HBFP-PEG network composition, with increasing effects from decreasing wt % PEG and a maximum effect occurring at 5 wt % PEG.

Hyperbranched Fluoropolymers and their Hybridization into Complex Amphiphilic Crosslinked Copolymer Networks

“…[41][42][43] These materials were developed initially as non-toxic, anti-biofouling coatings for application in the marine environment, and they have demonstrated remarkable perormance toward this application. [44] Moreover, their complex morphologies were also found to provide nanochannels that exhibit unusual thermallypromoted release of volatile guest molecules, [45] and nanoscale confinement of water swollen within the materials to result in dramatically increased moduli. [46] Finally, the discussion will conclude with recent work, directed toward the preparation of discrete nanoscale forms of the complex amphiphilic HBFP/PEG hybrid structures.…”

“…/PEG, have been investigated extensively, including their anti-biofouling performance against marine organisms, [44] encapsulation and release of guest molecules, [45] and mechanical properties, [46] to explore their applications in aqueous environments, such as non-toxic marine anti-fouling coatings, advanced drug delivery systems, and other potential biomedical devices.…”

“…The terpene geraniol was used as a model compound to study the release behavior upon temperature change through the employment of TGA. [45] T Dynamic 50 , defined as the temperature at which 50% mass loss of preloaded geraniol occurred, depended upon the relative balance of hydrophobic HBFP (I) to hydrophilic PEG components ( Figure 5). T reached a minimum at ca.…”

Influence of Shell Number on Loading Capacity of Microcapsules Containing Fragrance

“…Encapsulation of active ingredients, including flavors in polymer shell of urea-formaldehyde [1]- [4] and melamine-formaldehyde has been versatile [5]- [8]. Control of fragrance diffusion by barrier system of various types has been employed in fragrance prolongation, for instance, cyclodextrin host [9]- [10], solid-lipid nanoparticles [11], amphiphilic-crosslinked polymer network [12], double emulsion system [13], synthetic polymers formed by miniemulsion polymerization [14], coacervation with various carbohydrates [15]- [17], polymer blends [18] and multilayer microcapsules [19]. However, increasing in capacity of fragrance in urea-formaldehyde and melamine-formaldehyde is necessary to prolong the release period.…”

Hierarchical Inorganic–Organic Nanocomposites Possessing Amphiphilic and Morphological Complexities: Influence of Nanofiller Dispersion on Mechanical Performance

“…[1,2] Unlike typical hydrogels, [3][4][5] these complex crosslinked networks undergo morphological isomerization upon changes between organic and aqueous media, and have been described as being ''smart'' by Erdodi and Kennedy. [1] This distinct phenomenon leads to reorganization of two phase-incompatible components on the surface as well as in the interior domains, and further transformations, to afford many unique materials properties, such as mechanical behavior, [6] morphological variability, [7,8] sub-surface compartmentalizations and membrane performance, [9,10] surface anti-biofouling, [10][11][12] and biocapability. [13,14] Moreover, such properties can be expanded with the variety and attributes of chemical compositions that polymers possess and the complexity and control of architectures that polymers provide, [15] making it feasible to fabricate these amphiphilic crosslinked networks into intelligent devices for many fields, including the marine coatings industry.…”