FIBERS AND POLYMERS
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2021
·Vol. 22
·期 2
·396-404
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IF 2.153
Zhang Lu,Zhou Qingquan,Zhang Qipeng,Wu Minghua
To further improve the color yield and color fastness of disperse dyes (DDs) in washing-free printing, fluorosilicone-modified polyacrylate (FSMPA) was prepared as a new washing-free printing binder. The structure, thermal behaviors, surface characteristics, and washing-free printing properties of FSMPA were intensively investigated. The migration-diffusion-fixation mechanisms of DDs from a polymer binder film to PET were tentatively explored. The results showed that when the molar ratio of 1,3,5-tris(3,3,3-trifluoropropyl) methylcyclotrisiloxane (D 3 F ) to octamethylcyclotetrasiloxane (D 4 ) was 1:10 in the preparation of the modifier double-terminated vinyl polyfluoroalkyl siloxane (DVFS) and the dose of DVFS in the preparation of FSMPA was 9%, the printed polyester fabric exhibited excellent washing-free printing properties. Compared with polyacrylate (PA) and silicon-modified polyacrylate (SMPA), FSMPA has better color yield and color fastness. The glass transition temperature of FSMPA was decreased, the enrichment of fluorosilicone chains on the surface of FSMPA film was facilitated, and the hydrophobicity of FSMPA was improved. Thus, the difference in solubility parameters between the DDs and polymer binder film was increased, and the migration of the DDs from the FSMPA film to the PET substrate was promoted.
研究领域:
材料科学
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纺织工程
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染整技术
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DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2020
·Vol. 32
·期 2
·641-650
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IF 2.578
Jiantang Jiang,Yifeng Shen,Deyou Yu,Minghua Wu,Lei Yang,Shaoqi Li
The printing of polyester (PET) fabrics using binders and disperse dyes is an environmentally less harmful technique due to the exclusion of water-intensive washing processes. Unfortunately, the conventional polyacrylate (PA) binders are inapplicable for this printing technique as the high PA-disperse dye compatibility restrains the migration of disperse dye molecules from binder films into PET fabrics. Herein, we demonstrate a rational design and synthesis of novel PA binders by copolymerizing fluorosilicone monomers with multi-vinyl groups for the sustainable printing of PET fabrics. The incorporated fluorosilicone functionalities significantly decrease the solubility parameter of PA, facilitating the dye molecules migration toward PET fabrics. Meanwhile, the crosslink structure formed via vinyl groups restrains the migration of polymer chains and thus allows for the anchor of F/Si segments, enabling the continuous migration of disperse dyes. As a result, both the utilization ratio of disperse dyes and the color yield and fastness of printed PET fabrics are substantially improved. Moreover, the washing-free printing process using the developed binder can reduce 73% of water consumption, 74% of energy input, and 100% of wastewater discharge over the traditional printing process. Our study may provide insights into rational design of binders for the sustainable printing of PET fabrics.
研究领域:
材料科学
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纺织工程
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环境科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2024
·Vol. 25
·期 23
·12785
·
IF 4.9
Arina Pavlova,Ksenia Maleeva,Ivan V. Moskalenko,Vadim Belyaev,Mikhail V. Zhukov,Demid Kirilenko,Kirill V. Bogdanov,Evgeny Smirnov
Natural polyphenolic compounds play a pivotal role in biological processes and exhibit notable antioxidant activity. Among these compounds, chlorogenic acid stands out as one of the most widespread and important polyphenols. The accurate detection of chlorogenic acid is crucial for ensuring the quality and classification of the raw materials used in its extraction, as well as the final products in the food, pharmaceutical, and cosmetics industries that contain this bioactive compound. Raman spectroscopy emerges as a powerful analytical tool, particularly in field applications, due to its versatility and sensitivity, offering both qualitative and quantitative analyses. By using the self-assembly of gold nanoparticles at liquid–liquid interfaces and the developed “aqua-print” process, we propose a facile and inexpensive route to fabricate enhanced substrates for surface-enhanced Raman spectroscopy with high reproducibility. To ensure substrate reliability and accurate molecule detection in SERS experiments, a benchmarking procedure was developed. This process involved the use of non-resonant rhodamine 6G dye in the absence of charge transfer and was applied to all synthesized nanoparticles and fabricated substrates. The latter revealed the highest enhancement factor of 4 × 104for 72 nm gold nanoparticles among nanoparticle diameters ranging from 14 to 99 nm. Furthermore, the enhanced substrate was implemented in the detection of chlorogenic acid with a concentration range from 10 μM to 350 μM, demonstrating high accuracy (R2> 99%). Raman mapping was employed to validate the good uniformity of the signal (the standard deviation was below 15%). The findings of this study were also supported by DFT calculations of the theoretical Raman spectra, demonstrating the formation of the chlorogenic acid dimer. The proposed method is strategically important for the development of the class of in-field methods to detect polyphenolic compounds in raw materials such as plants, extracted plant proteins, and polyphenolic compounds.
研究领域:
分析化学
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纳米技术
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药学
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食品科学
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材料科学
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DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 16
·2009916
·
IF 18.808
Ruilian Chen,Dengchong Feng,Guojian Chen,Xudong Chen,Wei Hong
The construction of invisible patterns via high-resolution printing and the independent encoding/decoding of complex information can lead to promising applications in steganography and watermarking for optical encryption. Herein, a rewritable chiral photonic paper formed by cholesteric cellulose nanocrystals and polycation is reported. The chemically crosslinked polycation network interpenetrates in the cholesteric structure while retaining the optical properties of the photonic crystals. The film exhibits controllable wettability via anion exchange, leading to extremely low contrast in the dry state but high contrast by a rapid wetting response. Triple invisible information is independently encoded on the films, including invisible patterns caused by reversible counterion-controlled wettability, permanent fluorescent labels based on fluorescent counterions, and polarization-dependent structural colors based on cholesteric structures. Full color patterns can be reversibly constructed via inkjet printing, with a high resolution of 100 µm. In addition, the circular polarization characteristics of the cellulose nanocrystals, liquid crystals, endow the system with complex and independent responses, realizing a wetting/polarization double-key decryption. This work provides a simple and effective optical technique for coding complex information on a single material platform and expands the techniques available to achieve invisible patterns for sensing and anti-counterfeiting.
研究领域:
材料科学
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光学
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纳米技术
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密码学
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安全
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Fuqing Shan,Xiaoxia Le,Hui Shang,Weiping Xie,Wei Sun,Tao Chen
As one of the most promising candidates for dynamic information storage, intelligent gels with tunable optical properties under external stimuli have received great attention. The implementation of transparency variation for information display is a favorable and versatile strategy but still faces the challenge of on-demand encryption–decryption. Herein, an optical tunable organohydrogel is prepared, which has interpenetrating heterogeneous networks consisting of hydrophilic poly(N,N-dimethylacrylamide) (PDMA) and hydrophobic polyoctadecyl methacrylate (PSMA). The long alkane side chains of PSMA endow the organohydrogel with the capacity of crystallization–melting transitions under the stimulus of heat, accompanied by transparent–opaque switching. In addition, the variations of transparency can also be achieved by water-induced hydrophobic association and microphase separation, resulting from the unique heterogeneous networks of the organohydrogel. Based on the abovementioned two aggregated structures, various pieces of information can be loaded on the organohydrogel by light writing or water printing with the assistance of masks. The coded information can be encrypted and decrypted by solvent replacement and temperature switching. This elaborately designed organohydrogel can act as an effective communication platform with an improved security level and ignite the sparks of developing novel information storage materials.
研究领域:
材料科学
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纳米技术
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光电子学
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信息技术
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）