The novel thermochromic and energy-storage microcapsules with significant extension of color change range to different tones

Ma, Xiaomin; Wang, Liang; Li, Lei; Bian, Liran; Yang, Wenfang; Qing-tao, Meng

doi:10.1080/10601325.2019.1590125

Cited by 21 publications

(8 citation statements)

References 28 publications

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“…The FTIR of fluorane microcapsules was shown in Figure 3 . The fluctuation at 3409 cm −1 was caused by –NH and –OH stretching vibration [ 26 ], and the stretching vibration absorption peak and bending vibration absorption of triazine ring were located at 1584 cm −1 and 816 cm −1 , respectively [ 27 ]. The expansion and contraction vibration absorption of C–O–C appeared at 170 cm −1 , 1100 cm −1 and 1246 cm −1 [ 28 ].…”

Section: Resultsmentioning

confidence: 99%

Mechanism of Thermochromic and Self-Repairing of Waterborne Wood Coatings by Synergistic Action of Waterborne Acrylic Microcapsules and Fluorane Microcapsules

2021

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The fluorane thermochromic microcapsules and waterborne acrylic resin microcapsules were added into waterborne coatings at the same time to prepare intelligent waterborne coating film with dual functions of color change and self-repairing. The coating film prepared by adding 15.0% fluorane microcapsules and 5.0% waterborne acrylic resin microcapsules to the primer at the same time had better comprehensive properties. At this time, the coating film changed from yellow to colorless. The repair rate of the coating film was 58.4%. When the temperature was lower than 32 °C, waterborne acrylic resin microcapsules can improve the thermochromic performance of the coating film with fluorane microcapsules. Waterborne acrylic resin microcapsules can alleviate the color change of coating film with fluorane microcapsules. The fluorane microcapsules can improve the self-repairing performance of coating film with waterborne acrylic resin microcapsules. The results lay a theoretical and technical foundation for multifunctional coating film.

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Section: Resultsmentioning

confidence: 99%

Mechanism of Thermochromic and Self-Repairing of Waterborne Wood Coatings by Synergistic Action of Waterborne Acrylic Microcapsules and Fluorane Microcapsules

2021

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“…Broad and strong absorption appeared at 3409 cm −1 , which was caused by the superposition of stretching vibration absorption of –NH and –OH [ 22 ]. The stretching vibration absorption and bending vibration absorption of triazine ring were at 1584 cm −1 along with 816 cm −1 , respectively [ 23 ]. At 1170 cm −1 , 1100 cm −1 along with 1246 cm −1 , stretching vibration absorption of aromatic ether C–O–C appeared [ 24 ].…”

Section: Resultsmentioning

confidence: 99%

Mechanical and Optical Properties of Thermochromic Reversible Waterborne Primer Film on Tilia europaea with 1,2-Benzo-6-diethylaminofluorane Based Microcapsules

Wang

Yan

2020

Polymers

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A waterborne thermochromic primer film containing thermochromic reversible microcapsules on the surface of Tilia europaea was prepared. The influences of different microcapsule concentrations on the reversible thermochromic, optical, mechanical and liquid resistance properties of the primer films were investigated. Not only were the morphology and structure of microcapsules and films observed, but also the chemical compositions of the microcapsules and films were analyzed. The results showed that for the primer film with microcapsules, the microcapsule concentration had a more significant influence on color difference. The primer film with microcapsules can achieve thermochromic reversibility. The temperature of color change was 32 °C and it had a good color recovery. The film gloss was negatively correlated with the microcapsule concentration, and the film with 5.0%–15.0% concentration had the best gloss. Adding an appropriate concentration of microcapsules can effectively improve the mechanical properties of the film. The film with 0–15.0% microcapsules had better liquid resistance to detergent, i.e., grade 1. The bonding form between the primer film added with microcapsules and Tilia europaea was physical bonding. This study provides a technical reference for the development of modern intelligent discoloration wood products.

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“…26 Ma et al produced thermochromic microcapsules containing thermochromic materials and dispersive-cationic dyes. 27,28 In another study, Ma et al applied microcapsules to cotton/polyester fabric by coating method. 28 Zhang et al prepared reversible thermochromic polypropylene fibers via melt spinning.…”

Section: Introductionmentioning

confidence: 99%

“…27,28 In another study, Ma et al applied microcapsules to cotton/polyester fabric by coating method. 28 Zhang et al prepared reversible thermochromic polypropylene fibers via melt spinning. The morphologies, thermal properties, and color change behaviors of produced fibers were investigated.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, Tözüm et al applied poly (methylmethacrylate‐co‐glycidylmethacrylate) walled thermochromic microcapsules to cotton fabric by pad‐dry‐cure process 26 . Ma et al produced thermochromic microcapsules containing thermochromic materials and dispersive‐cationic dyes 27,28 . In another study, Ma et al applied microcapsules to cotton/polyester fabric by coating method 28 .…”

Section: Introductionmentioning

confidence: 99%

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Manufacturing surface active shell and bisphenol A free thermochromic acrylic microcapsules for textile applications

2020

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Preparation and characterization of some new thermochromic microcapsules with surface reactivity, material safety and their incorporation to cotton, and wool fabrics were performed in this work. Poly(methyl methacrylate-comethacrylic acid) P(MMA-co-MAA) was the shell of microencapsulated thermochromic system (TS). The TS acting as a core substance consisted of n-tetradecanol (TD) as solvent, crystal violet lactone (CVL) as a leuco dye and phenolphthalein (PP) as color developer. Particle photographs and average size distribution were evaluated using scanning electron microscopy (SEM) and particle size instruments, respectively. Microcapsules morphology was spherical and particle size average was 13.67 μm. Thermal treatment for thermophysical properties and degradation were performed by using differential scanning calorimetry (DSC) and thermogravimetry analysis (TGA). DSC and TGA results indicated that microcapsules absorbed 203.6 J/g of latent heat and had good thermal stability for textile applications. Meanwhile, microcapsules had thermo-regulation property due to phase changing of the TD solvent, which was a solvent component of TS. Microencapsulation of TS into P(MMAco-MAA) shell was proven by Fourier transform infrared (FTIR) spectroscopy. For thermally stimulated color change determination, UV-visible spectroscopy analysis and photographs taken at 25 C and 50 C were used during temperature increase. Some cotton and wool fabrics imparted microcapsules were prepared by exhaustion technique. The heat absorbance capacities of fabrics during melting were measured as 68.2 J/g for cotton fabric and 72.5 J/g for wool fabric. From T-history measurements, it was resulted that fabrics exhibited cooling and heating effect owing to the released or absorbed latent heat by TD. The color measurements based on CIELab system and photographs of fabrics taken at different temperatures showed that color of fabrics transformed from blue to colorless with increasing temperature. It was seen that the synthesized bifunctional thermochromic and energy storing

show abstract

The novel thermochromic and energy-storage microcapsules with significant extension of color change range to different tones

Cited by 21 publications

References 28 publications

Mechanism of Thermochromic and Self-Repairing of Waterborne Wood Coatings by Synergistic Action of Waterborne Acrylic Microcapsules and Fluorane Microcapsules

Mechanism of Thermochromic and Self-Repairing of Waterborne Wood Coatings by Synergistic Action of Waterborne Acrylic Microcapsules and Fluorane Microcapsules

Mechanical and Optical Properties of Thermochromic Reversible Waterborne Primer Film on Tilia europaea with 1,2-Benzo-6-diethylaminofluorane Based Microcapsules

Manufacturing surface active shell and bisphenol A free thermochromic acrylic microcapsules for textile applications

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