Solvent injection for polydiacetylene particle synthesis – Effects of varying solvent, injection rate, monomers and needle size on polydiacetylene properties

Polydiacetylene-based sensors for food applications

“…28 Our laboratory and other research groups have applied this method for the production of PDA vesicles as an alternative to the thin film hydration method. 24,[29][30][31] The DA monomers are dissolved in a polar solvent and slowly injected into an aqueous solution that is above the phase transition temperature of the monomer. The DA monomers self-assemble into vesicles and the solvent is evaporated from the solution.…”

“…78 Recent work has demonstrated control of PDA particle size and morphology by tuning solvent injection process variables, which eliminates the need for further particle processing to control sizes such as sonication and extrusion. 24,29 Considering the relatively high phase transition temperature 25 of common carboxy-terminated DAs, this greatly reduces the process complexity, energy intensity, and cost. Furthermore, concerns over vesicle suspension stability can be avoided by immediate secondary processing into materials.…”

Polydiacetylene-Based Sensors To Detect Volatile Organic Compounds

“…This method is commonly found in 3D printing and the synthesis of chiral PDA. , Furthermore, depending on the synthetic route, PDA can exist in various configurations as shown in Figure b. These include mono- or multilayer films in a flat sheet or tubular form, , single or multilayer vesicles, , or micelles. , …”

“…However, other studies have also attempted to alter its natural colors, such as to yellow, − orange, , or green, − by modifying the side chain functional groups, − comixing with dye, or incorporating transition metal . PDA packing within the layers is due to van der Waals interactions, while the head arrangement is the result of hydrogen bonding . As the side groups contain a higher number of atoms compared to the reactive center, the geometrical and charge constraints in the head groups are the two dominating forces of PDA’s crystal structure .…”

“…PDA’s blue-to-red colorimetric transition can be utilized as an on–off sensor, and its color transition hue and intensity can be used for analyte quantification. PDA synthesis requires no catalyst or additive, which makes the synthesis process of a high-purity product more cost effective. − This Perspective provides an overview of the diverse opportunities of PDA for the detection of VOCs. In particular, we highlight materials development, current issues on the engineering approach for VOC testing, and the recurring inconsistencies identified when reporting materials’ VOC sensing performance.…”