Systematically Exploring Molecular Aggregation and Its Impact on Surface Tension and Viscosity in High Concentration Solutions

Wang, Huan; Kong, Han-Bae; Zheng, Jie; Peng, Hui; Cao, Chuangui; Qi, Yanan; Fang, Kuanjun; Chen, Weichao

doi:10.3390/molecules25071588

Cited by 41 publications

(25 citation statements)

References 52 publications

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“…This could be attributed to the aggregations of the polymer chains. [ 54 ] The absorption peak of PBDTNS-FTAZ and PBDTBPS-FTAZ located at 544 and 552 nm, respectively, which can be assigned to the intramolecular charge-transfer between BDT and the FTAZ unit. In the film state, both two polymers exhibit a slight red-shift compared to the absorption spectra in dilute o -DCB solution, which could ascribe to the aggregation in the solid-state.…”

Section: Resultsmentioning

confidence: 99%

Comparing Benzodithiophene Unit with Alkylthionaphthyl and Alkylthiobiphenyl Side-Chains in Constructing High-Performance Nonfullerene Solar Cells

Xie

Zhao

2020

Polymers

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Using single-bonded and fused aromatic rings are two methods for extending the π-conjugation in the vertical direction of benzo [1,2-b:4,5-b′] dithiophene (BDT) unit. To investigate which method is more efficient in nonfullerene systems, two novel polymers based on alkylthionaphthyl and alkylthiobiphenyl substituted BDT named PBDTNS-FTAZ and PBDTBPS-FTAZ are designed and synthesized. Two polymers only exhibit small differences in structure, but huge differences in photovoltaic properties. They are studied by blended with 3,9-bis(2-methylene-(3-(1,1-dicyanomethylene)indanone)-5,5,11,11-tetrakis(4-hexylphenyl)dithieno [2,3-d’:2,3’-d’]-s-indaceno [1,2-b:5,6-b’] dithiophene (ITIC). The device based on PBDTNS-FTAZ:ITIC showed the best power conversion efficiency (PCE) of 9.63% with the Voc of 0.87 V, a Jsc of 18.06 mA/cm2 and a fill factor of 61.21%, while the PBDTBPS-FTAZ:ITIC only exhibit a maximum PCE of 7.79% with a Voc of 0.86 V, a Jsc of 16.24 mA/cm2 and a relatively low fill factor of 55.92%. Therefore, extending π-conjugation with alkylthionaphthyl is more effective against constructing nonfullerene solar cells.

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Section: Resultsmentioning

confidence: 99%

Comparing Benzodithiophene Unit with Alkylthionaphthyl and Alkylthiobiphenyl Side-Chains in Constructing High-Performance Nonfullerene Solar Cells

Xie

Zhao

2020

Polymers

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“…As shown in Figure 5a, the viscosity of RR218 solution remained stable during the variation of shear rates, which meant that RR218 solution is a Newtonian fluid. 39 For the RR218@PSBV dispersion, the viscosity was almost unchanged compared to that of RR218 solution, indicating that the RR218@PSBV dispersion also exhibited good Newtonian fluid performance. Furthermore, the maximum bubble pressure method was conducted to determine the surface tension.…”

Section: Methodsmentioning

confidence: 92%

Green and Efficient Inkjet Printing of Cotton Fabrics Using Reactive Dye@Copolymer Nanospheres

Song

Fang

Bukhari

et al. 2020

ACS Appl. Mater. Interfaces

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Digital inkjet printing of textiles possesses great advantages like high efficiency and flexible production, but the challenges like the risk of causing serious environmental problems due to the large usage of dyes and chemicals still remain a matter of concern. In response to this problem, herein, a novel kind of reactive dye@copolymer nanosphere was prepared through the adsorption of C. I. Reactive Red 218 dyes (RR218) onto cationic poly(styrene-butyl acrylate-vinylbenzyl trimethylammonium chloride) (PSBV) nanospheres and applied in inkjet printing on woven cotton fabric. Results show that the prepared RR218@PSBV nanospheres possessed homogeneous size and good stability for ink preparation. In comparison with the original RR218 solution, the color depth of RR218@PSBV-printed fabric increased by 1.4 times and the dye residues in the printing effluent were reduced by about 45%. Meanwhile, the consumptions of sodium carbonate and urea in conventional inkjet printing were reduced by about 3.3 and 22.8 mg/cm 2 , respectively, and the printing process was simplified with 30% energy saving. Furthermore, the mechanism of the color enhancement by nanospheres was revealed by the calculation of absorption and scattering coefficients based on the Kubelka−Munk function. This work provides a potential application of dye@polymer nanospheres to promote the optimization of the textile inkjet printing technique and alleviates the environmental impact of conventional textile coloration.

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“…Figure 2 shows the absorption spectra of the Blue 49 and Orange 13 dye solutions with different concentrations of DEG. For both dyes, the two main peaks in the visible region came from the dye monomer and aggregation absorption, respectively, while longer wavelength peak λ 2 belonged to monomer absorption, and shorter peak λ 1 came from aggregation absorption [33,35]. After adding DEG into the dye solutions, the two main peaks of both dye solutions increased, which meant that DEG molecules could separate large dye aggregations into more small aggregations and dye monomers.…”

Section: Interaction Between Deg and Dyesmentioning

confidence: 98%

“…The presence of aggregates in the dye solutions may influence their photophysical behavior, which can be detected from the shape of the absorption spectra in the visible region [29][30][31][32], so UV-Vis absorption spectroscopy is an important method for studies of the aggregation state [17][18][19][30][31][32][33][34]. Figure 2 shows the absorption spectra of the Blue 49 and Orange 13 dye solutions with different concentrations of DEG.…”

Section: Interaction Between Deg and Dyesmentioning

confidence: 99%

Interaction of Reactive-Dye Chromophores and DEG on Ink-Jet Printing Performance

2020

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Digital inkjet printing has been widely used in textile industry. The quality of dye solutions and ink-jet droplets limits the ink-jet printing performance, which is very important for obtaining high-quality ink-jet printing images on fabrics. In this paper, we introduced diethylene glycol (DEG) into the dye solutions of Reactive Blue 49 and Reactive Orange 13, respectively, and investigated the interaction between dye chromophores and DEG molecules. Results indicated that the dye chromophores were featured in the aggregation. Adding DEG into the dye solution could effectively disaggregate clusters of reactive dyes, and eliminate satellite ink droplets, thus improving the resolution of the ink-jet printing image on fabrics. Under the same DEG concentration, the disaggregation effect was more obvious in Orange 13 than in Reactive Blue 49. Higher DEG concentration was required in Reactive Orange 13 solution for creating complete and stable ink drops. The surface tension and viscosity of the dye solutions were measured, and printing performance on cotton fabrics was evaluated. The interaction mechanism between dye chromophores and DEG molecules was also investigated. Results from this work are useful for high-quality ink-jet printing images on fabrics.

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Systematically Exploring Molecular Aggregation and Its Impact on Surface Tension and Viscosity in High Concentration Solutions

Cited by 41 publications

References 52 publications

Comparing Benzodithiophene Unit with Alkylthionaphthyl and Alkylthiobiphenyl Side-Chains in Constructing High-Performance Nonfullerene Solar Cells

Comparing Benzodithiophene Unit with Alkylthionaphthyl and Alkylthiobiphenyl Side-Chains in Constructing High-Performance Nonfullerene Solar Cells

Green and Efficient Inkjet Printing of Cotton Fabrics Using Reactive Dye@Copolymer Nanospheres

Interaction of Reactive-Dye Chromophores and DEG on Ink-Jet Printing Performance

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