ACS Applied Materials & Interfaces
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2025
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IF 8.2
Dongwen Zou,Tianhe Xu,Hongyang Li,Xiaopeng Zhang,Hao Sun,Qiushi Rao,Meimei Zhu,Shuai Chang,Yaowu He,Hong Meng
In the pursuit of high-performance organic electrochromic (OEC) materials that transition from transparent to deep colors, we design and synthesize a series of copolymers─termed MeTmPhFn─composed of TPA and fluorene with triethylene glycol and ester groups incorporated. This is achieved through gradient tuning of monomer ratios via Suzuki copolymerization. Five of these polymers exhibit excellent film-forming properties, and their electrochromic devices demonstrate remarkable pale blue-to-reddish brown switching behavior. Notably, benefiting from the suitable continuity and moderate porosity of MeT0.5PhF0.5 film, the electrochromic device based on MeT0.5PhF0.5 showcases rapid reversible switching times of 2.5 s for coloring and 1.3 s for bleaching, highlighting its exceptional responsiveness. This device achieves the highest contrast of 58.7% at 465 nm, paired with impressive cycling stability, retaining 93.7% of its initial contrast ratio after 1440 cycles, and exhibits a high coloration efficiency of 619 cm2 C–1. This study presents an effective approach for designing and synthesizing high-performance electrochromic copolymers that effectively transition from colorless to vibrant hues, paving the way for advanced applications in smart windows and display technologies.
研究领域:
材料科学
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有机化学
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DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2022
·Vol. 139
·期 45
·e53106
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IF 3.057
Sai Wu,Lulu Liang,Furong Chen,Zheng Yang,Yu Zheng,Yitian Wu,Lanze Li,Gaobo Lou,Juntao Dai,Yajun Pang,Hao Chen,Qun Fang,Zhehong Shen
The utilization of bamboo resources can significantly alleviate the wood shortage and facilitate CO 2 neutralization. However, the adhesive bonding performance of bamboo is not ideal, which greatly limits its application. Therefore, the biggest challenge is to explore a simple and effective method to enhance the bonding between bamboo and adhesive. In this study, we synthesized three butyl acrylate-styrene (BS) emulsions with different monomer ratios and incorporated them into urea-formaldehyde (UF) resins to prepare butyl acrylate-styrene modified urea-formaldehyde (BUF) adhesives. Results show that BS emulsion not only prolongs the workability time of UF adhesives (95 s–108 s), but also reduces the free formaldehyde content (0.38%–0.26%). Specifically, BS emulsion with the highest hard/soft monomer ratio makes BUF adhesive the lowest activation energy, showing the accelerated curing reaction. Specifically, the prepared laminated bamboo-veneer lumber (LBVL) exhibits the best wet-bonding strength and meets the Chinese National Standard, suggesting that BS emulsion with a higher hard/soft monomer ratio can enhance bonding performance. Thus, this efficient method can not only enhance various adhesive properties, but also improves the bonding performance on LVBL, which can greatly ease the shortage of wood resources and speed up the development of the bamboo industry.
研究领域:
林业科学
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材料科学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2017
·Vol. 41
·期 13
·5669-5677
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IF 3.269
Baolong Wang,Huanqin Zhao,Liying Wang,Junmin Sun,Yongfeng Zhang,Zhenzhu Cao
Zirconium complexes (L2Zr, L = –OC6H2-4-R1-6-R2-2-CH2-N[(CH2)3-N(CH2CH2)2O]-CH2-4-R1-6-R2-C6H2O–, R1 = Me, R2 = tBu, complex 1; R1 = R2 = tBu, complex 2) containing two symmetrical amino-bis(phenolate) ligands were prepared. Moreover, titanium complexes (LTi(OiPr)2, L = –OC6H2-4-R1-6-R2-2-CH2-N[(CH2)3-N(CH2CH2)2O]-CH2-4-R1-6-R2-C6H2O–, R1 = Me, R2 = tBu, complex 3; R1 = R2 = tBu, complex 4) based on symmetrical amino-bis(phenolate) ligands were synthesized. These complexes were characterized by 1H and 13C NMR spectroscopy and elemental analyses. The solid-state structures of complexes 2 and 3 were determined by X-ray diffraction. Complexes 1, 2, 3, and 4 were highly active initiators for the ring-opening polymerization of L-lactide (L-LA) and rac-lactide (rac-LA). The experimental results show that complexes 1 and 2 are highly active and excellent catalysts for the immortal ring-opening polymerization (iROP) of L-lactide and rac-lactide in the melt state. The monomer-to-complex ratio reached 200 000/1, which is the highest feeding molar ratio of lactide so far, to the best of our knowledge. Meanwhile, a narrow polydispersity index (1.11–1.58) of polymers was obtained, and the number-average molecular weight approached 8.64 × 104 g mol−1. The turnover frequency (TOF) reached 6593 h−1, and the polymerization proceeded smoothly even in an air environment.
研究领域:
材料化学
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有机化学
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DOI
高影响因子
Nanoscale Research Letters
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2014
·Vol. 9
·期 1
·1-9
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IF 2.481
Zhao Qin,Jamal Ruxangul,Zhang Li,Wang Minchao,Abdiryim Tursun
In this study, a simple one-step template-free solution method was developed for the preparation of poly(3,4-ethylenedioxythiophene) (PEDOTs) with different morphologies by adjusting various ratios of oxidant (FeCl 3 ·6H 2 O) to monomer (3,4-ethylenedioxythiophene (EDOT)). The results from structural analysis showed that the structure of PEDOT was strongly affected by the oxidant/monomer ratio, and the polymerization degree, conjugation length, doping level, and crystallinity of PEDOT decreased with increasing of the oxidant/monomer ratio. The morphological analysis showed that PEDOT prepared from an oxidant/monomer ratio of 3:1 displayed a special coral-like morphology, and the branches of ‘coral’ would adjoin or grow together with increasing content of oxidant in the reaction medium; consequently, the morphology of PEDOT changed from coral to sheets (at an oxidant/monomer ratio of 9:1). The electrochemical analysis proved that the PEDOT prepared from an oxidant/monomer ratio of 3:1 had the lowest resistance and the highest specific capacitances (174 F/g) at a current density of 1 A/g with a capacity retention rate of 74% over 1,500 cycles, which indicated that the PEDOT with a coral-like morphology could be applied as a promising electrode material for supercapacitors.
研究领域:
材料科学
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电化学
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DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
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2025
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IF 2.8
Qian Zhao,Huixuan Li,Yuanyuan Guo,Moqiong Duan,Mu Li,Tao Li,Hongya Li,Shuna Li,Shuxiang Wang,Quan Wang
s: This study aimed to prepare a new separation medium, silane coupling agent KH570- modified halloysite nanotube (MPS-HNT) monolithic column, with excellent separation performance for small molecular compounds and macromolecular proteins. This was prepared using the principle of redox polymerization with modified HNTs as monomers. The optimal monomer proportion was obtained by optimizing the ratio of monomer, cross-linker, and pore-forming agent, which was evaluated using scanning electron microscopy, nitrogen adsorption, and mercury intrusion. The monolithic column exhibited a relatively homogeneous pore structure and good separation performance and permeability. As a high-performance liquid chromatography stationary phase, six small aromatic molecules were successfully separated in 6 min with a theoretical plate count of 35, 640 plates m −1 for benzene. Twenty-one peaks were separated from the fermentation mattress extract containing lipopeptide antibiotics on the MPS-HNT column. The separated chromatographic peaks further identified three lipopeptide antibiotics using matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF-MS) analysis. Twelve chromatographic peaks were isolated from chicken egg whites, and the eighth peak was identified as the lysozyme. The methodological validation of the lysozyme in chicken egg white showed that the linear correlation coefficient was 0.9996. The intraday and inter-day relative standard deviations were 3.1–4.0 % and 1.9–3.4 %, respectively. The spike recovery rate of lysozyme was 94.20–103.31 %. The overall column displayed good stability: the relative standard deviations of the peak area of six aromatic compounds and retention time were < 3.28 %.
研究领域:
分析化学
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生物化学
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DOI
PubMed
高影响因子
Analytical Methods
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2018
·Vol. 10
·期 45
·5387-5397
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IF 2.073
Chunmiao Bo,Xiaojun Dai,Weimin Chen,Rui Cao
Selectivity is very important for stationary phase applications. However, selectivity is usually quite difficult to adjust once the ligands are fixed. Departing from the reported methods, dodecyl methacrylate (DOMA) and hydroxyethyl methacrylate (HEMA) were grafted onto a silica surface via two-step surface initiated-atom transfer radical polymerization (SI-ATRP) to synthesize reverse-phase/hydrophilic interaction mixed-mode stationary phases. The grafted amounts of C12 and OH functional groups were controlled by varying the ratios of DOMA to HEMA in the polymerization system. The resulting stationary phases were characterized by transmission electron microscopy (TEM), solid-state 13C NMR spectroscopy, elemental analysis (EA), Fourier transform infrared (FT-IR) spectrometry, and thermogravimetric analysis (TGA). The chromatographic performance and separation selectivity of the packed columns were investigated in different chromatographic modes using a wide range of analytes, including a non-polar benzene series, moderately polar β-agonists as well as organic acids, and strongly polar nucleosides. Exceptionally, the retention of the tested analytes displayed an obvious dependence on the ratio of the two functional monomers in the polymerization. In conclusion, the proposed strategy for the development of a mixed-mode chromatographic stationary phase can provide flexible selectivity by simply tuning the ratios of functional monomers.
研究领域:
分析化学
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色谱技术
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DOI
高影响因子
MACROMOLECULES
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2025
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IF 5.2
Ruirui Shi,Jinghao Hao,Han Liu,Yan Chen,Siliang Zhan,Haifeng Lu,Nijuan Sun,Hua Wang,Chuanjian Zhou
The stereochemistry of polymers governs their macroscopic mechanical and thermodynamic properties by regulating chain packing and crystallization behavior. Although the stereochemistry–structure–property relationship has been well-elucidated in symmetrically substituted polysiloxanes, it remains highly complex in asymmetrically substituted counterparts due to the propensity for siloxane backbone rearrangement. Taking asymmetrically substituted poly(methyl(3,3,3-trifluoropropyl)siloxane) (PMTFPS) as a model system, this study quantitatively characterizes its stereochemical configuration using 19F NMR spectroscopy and systematically elucidates the relationship between the feed ratio of cis-1,3,5-tris(3,3,3-trifluoropropyl)methylcyclotrisiloxane (cis-D3F) and the stereoregularity of PMTFPS. The results reveal that when the cis-D3F content exceeds 58%, the resulting PMTFPS exhibits typical features of isotactic polymers and displays semicrystalline behavior. With increasing isotacticity, the d-spacing of the crystalline phase gradually decreases, and the crystal morphology transitions from fibrous and lamellar structures to spherulitic domains under nonisothermal crystallization. Further mechanical testing demonstrates that silica-reinforced PMTFPS elastomers with high stereoregularity exhibit a pronounced self-reinforcement effect, attributed to enhanced strain-induced crystallization (SIC). This work not only uncovers the intrinsic correlations among stereochemical configuration, crystalline structure, crystallization kinetics, and macroscopic properties of PMTFPS but also offers valuable guidance for the stereochemical regulation and molecular design of high-performance asymmetrically substituted polysiloxanes.
研究领域:
高分子化学
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材料科学
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物理化学
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核磁共振波谱学
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结晶学
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机械工程
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DOI
高影响因子
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