APPLIED SURFACE SCIENCE
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2019
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IF 5.155
Liangyu Lu,Jian Li,Hongwei Li,Chengtao Gao,Haibo Xie,Yuzhu Xiong,Zhu Luo,Qi Sun,Fuping Dong
Hierarchical structured materials represent an interesting platform for many potential applications such as separation, catalyst and drug delivery etc. However, controlled fabrication of this special structure still remains a big challenge. In the present work, a controllable sol-gel procedure was developed to precisely fabricate polysilsesquioxane particles with bowls-on-sphere structure from mixed organoalkoxysilane precursors with sodium ligninsulfonate as surfactant and polystyrene spheres as structure-directing agents. The morphology of the particles can be fine-tuned by judiciously adjusting the ratio of two silane precursors, amount of ammonia, surfactant content and polystyrene amount. The formation mechanism of spheres-on-sphere structured polysilsesquioxane particles was explored.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2018
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IF 6.735
Hailong Liu,Ruixue Sun,Shengyu Feng,Dengxu Wang,Hongzhi Liu
Developing a facile and rapid method to prepare adsorbents for an efficient and selective removal of dyes is of great importance for human health and environment. In this work, a silsesquioxane-based disulfide-linked polymer (DLP) was rapidly synthesized by a simple oxidative coupling reaction of octa(3-mercaptopropyl)silsesquioxane within 2 min at room temperature. The synthesized DLP demonstrated selective and efficient adsorption of cationic dyes over anionic dyes with the maximum capacities of 12.94 mg g −1 for methylene blue, 18.47 mg g −1 for rhodamine B and 26.69 mg g −1 for crystal violet. The high uptake and selectivity for cationic dyes was attributed to the electrostatic interactions between the anionic charges from sulfur and oxygen anions formed by the deprotonation of thiols and hydroxyls in the DLP and the cationic charges from the dyes, and the swelling behavior of the DLP. To investigate the adsorption process, the effect of various factors such as contact time, initial concentration, temperature, and pH on the adsorption activity of cationic dyes was studied. The adsorption equilibrium data showed a better fitting to the Langmuir isotherm model than the Freundlich model and the adsorption kinetics fitted well with the pseudo-second-order kinetic model, indicating that the adsorption process is mostly governed by the chemisorption behavior. Additionally, the absorbent was recyclable with the adsorption capacity being >95% after five times recycle adsorption. These results indicated that the present disulfide-linked polymer could be promisingly applied as an efficient adsorbent for the selective removal of cationic dyes from industrial wastewater.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
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2024
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IF 4.1
Zaoxia Wen,Liang Xu,Xingyu Liu,Linxuan Fang,Lianbin Wu
A novel method was developed for constructing cross-linked silsesquioxane, utilizing Q-type H-POSS as a precursor. The Piers-Rubinsztajn (P–R) like reaction of Q-type H-POSS was catalyzed by B(C 6 F 5 ) 3 , resulting in the production of a prepolymer containing partial Si–H. Upon heating at high temperature in air, the prepolymer transformed into an insoluble and infusible cross-linked polymer, named Cured poly(H-POSS). This polymer exhibited high thermostability, with a 5 % weight loss temperature ( T 5d ) of 709 °C and a residue of 92 % at 800 °C. Additionally, Cured poly(H-POSS) exhibited high transparency, with a transmittance of 90 % in the 400–800 nm wavelength range, and favorable dielectric properties, with a dielectric constant ( D k ) of 2.88 at 14 GHz.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
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2024
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IF 5.3
Zhenxiang Shen,Qiuyue Liu,Qiu Meng,Zhiyong Sun,Yizhen Li,Enze Yu,Yi Shen,Qing Liu,Taotao Ge,Jingguo Li,Jie Yu,Shanqiu Liu
Superhydrophobic surfaces are renowned for their extreme hydrophobicity and versatility, showing great potential in numerous applications. Yet, the complexity of their production and susceptibility to mechanical and chemical degradation significantly limit their practical use. Herein, we introduce a straightforward one-step, solvent-free method for the in situ growth of polysilsesquioxane nanospikes (PNS) on glass microfibers, creating a hierarchical micronano composite material with excellent superhydrophobic properties, evidenced by a water contact angle of approximately 170° and a rolling angle below 3°. This composite exhibits exceptional stability against severe temperatures, humidity, and corrosive substances, including strong acids/bases and organic solvents, maintaining its superhydrophobicity even after repeated mechanical abrasion and oil contamination. Such resilience is attributed to the synergistic effect of its micronano hierarchical structure and the three-dimensional, covalently cross-linked structure of the PNS. Notably, it can easily and rapidly transform between superhydrophobic and superhydrophilic states via simple plasma treatment and surface re-engineering, facilitating its application in the highly efficient (>98%) separation of diverse and complex oil–water mixtures. This work opens promising avenues for applying superwettable surfaces in practical scenarios, especially those demanding durability and adaptability.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
SOFT MATERIALS
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2017
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IF 1.101
Lingli Ni,Mei Wu,Feng Chen,Irena Deroche,Abraham Chemtob
A visible light-mediated sol–gel process can promote the ordering of hexylene, octylene, and decylene-bridged polysilsesquioxane (SQ) with very simple organosilane building blocks having only a short alkylene bridging group: (CH3O)3SiCnH2nSi(OCH3)3 (n = 6, 8, 10). Photocondensation and self-assembly of films are promoted through exposure to a light-emitting diode (LED; 405 nm). The solvent-free synthesis involves very low light intensity (0.1 mW/cm2) and a minimum amount of photoacid generator (PAG; 0.5 wt%) acting as a photocatalyst. X-ray diffraction (XRD) and scanning electron microscopy (SEM) prove the high level of organization, while real-time Fourier transform infrared spectroscopy shows conformational ordering of alkylene chains throughout irradiation. Molecular modeling reveals a multilayer structure based on the stacking of a single polysiloxane chain, with organic groups attached to adjacent Si atoms showing up and down orientation.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2025
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IF 7.3
Jialong Zhu,Yuanchuan Ma,Jiao Wei,Yang Hu,Haolan Gou,Hailong Wang,Wenyu Fang,Hong Fan,Jintao Wan
Developing hard yet flexible organic-inorganic hybrid coating with enhanced substrate adhesion and self-cleaning ability is of the great interest to many application scenarios such as foldable display devices. To this end, herein polysilsesquioxanes (PGSQ-F) with perfluorinated alkyl and epoxy moieties are synthesized and then coated on the amine-modified substrates (glass and PET) to create strong interfaces by the epoxy-amine reaction. After UV curing in the presence of a photoinitiator, the epoxy group of PGSQ-F undergoes a ring-opening polymerization to form a highly cross-linked network. The adhesion of PGSQ-F coating to the treated glass and PET substrates is as high as 3.9 ± 0.4 MPa and 1.5 ± 0.3 MPa, respectively. The high adhesive strength enhances the coating's resistance to various solvents. Moreover, the obtained coatings display the high pencil hardness (9H pencil hardness), excellent flexibility (1 mm bending diameter) and high transmittance (89.5 % 550 nm). In addition, the perfluorinated alkyl chains from PGSQ-F spontaneously aggregate onto the coating surface, endowing the coating with omniphobic feature, with water and n-hexane contact angle of 115.1 ± 0.7° and 70.2 ± 0.5°, respectively, which account for their outstanding antismudge and self-cleaning properties.
研究领域:
材料科学
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表面化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Ce Zhang,Cong Ma,Xiaowei Yao,Xiaomei Yang,Wanbin Zhang,Guanghua Zhang
Developing siloxane-based hybrid coatings with excellent water vapor barrier performance remains a great challenge. The water vapor barrier ability of siloxane-based coatings can be effectively improved by tailoring the chemical structure of silane precursors. In this article, three thioether-ester-bridged polysilsesquioxane (BPSQ) coatings were fabricated from bridged silsesquioxane precursors by sol-gel method involving hydrolysis and condensation reactions. The bridged silsesquioxane (BSQ) precursors were synthesized by (3-mercaptopropyl)trimethoxysilane (MPTMS) and reagents with molecular structure containing C C groups via a facile thiol-ene click reaction. Experimental evidence obtained from FT-IR and NMR techniques confirmed the bridged molecular structure of BSQ precursors. The results obtained from XRD , SEM and TEM proved that the BPSQ coatings had short range ordered and long range disordered lamellar structure parallel to the substrate. These lamellar BPSQ coatings performed better water vapor barrier ability with WVTR of 3 ~ 7 g·cm −2 ·d −1 in comparison to polymer and silica-based hybrid coatings. Of them, MA-BPSQ coating performed the best water vapor barrier ability. The chemical structure of bridged organic chain had great effect on the distance of lamellar nanostructure , which played a key role in improving water vapor barrier property of BPSQ coatings.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
MATERIALS LETTERS
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2024
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IF 2.7
Xiaohua Li,Kunfeng Li,Shuang Zhao,Zhen Zhang,Peng Zhang,Yilong Song,Yuanjia Xia,Zhicong Gan,Zichun Yang
Aerogel fibers inherit the merits of aerogel and fibrous materials, such as ultralow density, large specific surface area and high flexibility, demonstrating great potential as the next generation functional fibers. Herein, an ice-template freeze-casting strategy is developed to prepare polysilsesquioxane aerogel long fibers (PALFs) similar to natural fibers in structure. During the freeze-casting, the strong mutual interaction between solid and liquid phases in the hydrogel induces uniform nucleation and continuous growth of ice crystals in confined spaces. The three-dimensional monolithic hydrogel is gradually deconstructed into one-dimensional fibrous geometries by the growing columnar ice crystals. The obtained PALFs exhibit the polygonal cross-section with a uniform mesoporous structure. After simple physical assembly, the monolithic PALFs exhibit good thermal insulation performance (as low as 25.0 mW/(m·K) at 25 °C) and high-efficiency absorption of broadband sound waves (with a noise reduction coefficient up to 0.58).
研究领域:
材料科学
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声学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）