Preparation, Characterization, and Electrochromic Properties of Nanocellulose-Based Polyaniline Nanocomposite Films

Abstract

On the basis of nanocellulose obtained by acidic swelling and ultrasonication, rodlike nanocellulose/polyaniline nanocomposites with a core-shell structure have been prepared via in situ polymerization. Compared to pure polyaniline, the nanocomposites show superior film-forming properties, and the prepared nanocomposite films demonstrate excellent electrochemical and electrochromic properties in electrolyte solution. Nanocomposite films, especially the one prepared with 40% polyaniline coated nanocomposite, exhibited faster response time (1.5 s for bleaching and 1.0 s for coloring), higher optical contrast (62.9%), higher coloration efficiency (206.2 cm/C), and more remarkable switching stability (over 500 cycles). These novel nanocellulose-based nanorod network films are promising novel electrochromic materials with excellent properties.

Nanocomposite Coatings: Preparation, Characterization, Properties, and Applications

“…In the case of organic matrix, a wellknown approach to generate inorganic nanophases within an organic matrix is to utilize sol-gel chemistry [18]. Inorganic sol-gel precursors such as silicon, titanium, aluminum, and zirconium metal alkoxides are employed in the formulation of nanocomposite coatings.…”

“…For organic matrix, called polymer-based nanocomposite, the most used polymers for preparation of nanocomposite coating can be listed as follows: epoxy [2][3][4][5][6][7], polyurethane [8,9], Chitosan [10,11], polyethylene glycol (PEG) [12][13][14][15], polyvinylidene fluoride (PVDF) [16], PANi [17][18][19], PPy [20][21][22][23], polystyrene [24], polyamic acid and polyimide [25], rubber-modified polybenzoxazine (PBZ) [26], polymers containing reactive trimethoxysilyl (TMOS) [27], pullulan [28], fluoroacrylic polymer [29,30], ethylene tetrafluoroethylene (ETFE) [31], polyacrylate [3], poly(N-vinyl carbazole) [32], polycarbonate [33], fluorinated polysiloxane [34], polyester [35], polyacrylic [36], polyvinyl alcohol (PVA) [37], polydimethylsiloxane [38], polyamide [39], and UV-curable polymers [40].…”

“…For organic nanoparticles (organic nanofiller), the most used nanoparticles were PTFE [80][81][82], PEO [83], PANi [31], or nanocellulose and cellulose nanocrystal [18,40].…”

“…This method was used to fabricate the nanocomposite coatings with organic matrices, which were conducting polymer [17,18] or other monomers with initiators. The nanofillers were metals or metal oxides (see Figure 7).…”

Effective Corrosion Protection Coatings of Polyaniline/Gamma-Alumina Nanocomposites

“…The mechanism of corrosion protection by PANI is related to both barrier and electrochemical protection effects, whereby increases in corrosion potential and passivation layer formation lead to an effective corrosion rate reduction on metal surfaces. (10)(11)(12)(13)(14)(15)(16)(17) Recently, a considerable number of publications associated with polymer-clay or polymer-silica nanocomposites have been reported regarding effectively improved anticorrosive properties. It has been shown that montmorillonite clay and nanosilica can enhance the anticorrosive effect of polymer coatings, owing to the enhancement of barrier properties by increasing the lengths of diffusion pathways for oxygen and water.…”