Polymers
·
2020
·Vol. 12
·期 9
·2031
·
IF 3.426
Nidhin Divakaran,Manoj B. Kale,Duraisami Dhamodharan,Suhail Mubarak,Lixin Wu,Jianlei Wang
Montmorillonite (MMT) displays excellent cohesion with an unsaturated polyester (UP) matrix to generate a material which exhibits an extensive range of commercial applications. The organic modification of MMT using polyhedral oligomeric silsesquioxanes (POSS) and the effect of POSS-MMT on the thermal, mechanical, and electrical properties of UP are reported here. Transmission electron microscopy (TEM) images were used to characterize the modification of MMT using POSS. Modified MMT (POSS-MMT) was incorporated, at different wt.% (0.5, 1, 3, 5), into UP via in-situ polymerization. The presence of POSS-MMT enhanced the characteristic properties of UP as a consequence of good dispersion in the polymer matrix. Scanning electron microscopy (SEM) images support effective POSS-MMT dispersion leading to tensile strength enhancement of a UP/POSS-MMT nanocomposite (3 wt.% POSS-MMT) by 54.7% as compared to that for unmodified UP. TGA displays a 35 °C improvement of thermal stability (10% mass loss) at 5% POSS-MMT incorporation, while the electrical conductivity is improved by 108S/m (3 wt.% POSS-MMT) in comparison to that for unmodified UP. The conventional obstacle of UP associated with shrinkage weight loss during curing seems to be moderated with POSS-MMT incorporation (3%) resulting in a 27.8% reduction in shrinkage weight loss. These fabricated nanocomposites expand the versatility of UP as a high-performance material owing to enhancements of properties.Keywords:montmorillonite;aminopropyl isobutyl POSS;unsaturated polyester;mechanical properties;electrical conductivity;shrinkage weight loss
研究领域:
材料科学
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化学工程
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DOI
PubMed
高影响因子
Asian Journal of Organic Chemistry
·
2017
·Vol. 6
·期 8
·1034-1042
·
IF 2.788
Yong Zhang,Tao Yue,Hongliang Cao,Yun Gao,Weian Zhang
Graphical Hugo POSS : A photosensitive organic–inorganic hybrid porphyrin (H 2 TPP−Azo−POSS) exhibited a tunable morphology by simply changing the concentration and polarity of the solvent. Spherical micelles and linear nanowires were formed in CHCl 3 , whilst vesicles were formed in CHCl 3 / n -hexane. The morphologies of H 2 TPP−Azo−POSS demonstrated a light-triggered transition, whilst the size of the aggregates decreased under UV irradiation. In this study, we have synthesized a new photosensitive organic–inorganic POSS-containing hybrid porphyrin derivative (H 2 TPP−Azo−POSS), in which azobenzene was used as a bridge to conjugate the porphyrin and POSS, by using click chemistry. The self-assembly behavior of H 2 TPP−Azo−POSS was studied at different concentrations in CHCl 3 and in CHCl 3 / n -hexane mixed solvent systems. Our results showed that the self-assembled morphology of H 2 TPP−Azo−POSS could be tuned by varying the concentration and polarity of the solvent. Spherical micelles and linear nanowires could be obtained in CHCl 3 , whilst vesicles could be formed in CHCl 3 / n -hexane mixtures with low polarities. The supramolecular self-assembled morphologies of H 2 TPP−Azo−POSS demonstrated a light-triggered transition behavior, whilst the size of the assembled aggregates decreased significantly under UV irradiation.
研究领域:
材料科学
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有机化学
·
纳米技术
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DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2024
·
IF 5.8
Zhengye Gu,Shanyi Guang,Gang Wei,Hongyao Xu
The combination of chemotherapy and photothermal therapy has garnered significant attention in the field of multimodal cancer therapy. However, achieving precise and controllable delivery of therapeutic agents remains a challenge. In this study, we designed a biocompatible smart nanomaterial ( PSD-FA ) for efficient loading of doxorubicin (DOX) through dynamic chemical bonding, with the aim of achieving responsive behavior to both the tumor microenvironment (TME) and external laser irradiation. The incorporation of PEG into the nanoplatform enhanced hydrophilicity of PSD-FA NPs. Folic acid (FA) served as a targeting ligand to guide the nanoparticles tumor sites. On one hand, SQ-N acted as an effective photothermal agent that efficiently converted light energy into heat energy upon stimulation by exogenous near-infrared light. This localized increase in temperature at the tumor site facilitated targeted killing of tumor cells. On the other hand, after photothermal therapy-induced tumor ablation, DOX was released in response to redox stimuli due to significantly higher concentrations of glutathione (GSH), an antioxidant presents in TME. This allowed deep penetration into the tumor tissue, expanding the attack area and inhibiting nucleic acid synthesis in tumor cells, ultimately leading to cell death. Both in vitro and in vivo experiments demonstrated excellent anticancer efficacy of PSD-FA NPs. Overall, this intelligent nanomaterial successfully achieved targeted drug delivery with redox-responsive release capabilities while synergistically combining chemo-photothermal therapies, thus exhibiting great potential for clinical applications.
研究领域:
生物医学工程
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肿瘤学
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纳米医学
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DOI
高影响因子
Journal of Coatings Technology and Research
·
2022
·Vol. 20
·期 1
·249-260
·
IF 2.339
Guo Ping,Zhao Xiaomiao
Abstract Self-cleaning outdoor garment fabrics are desired. However, traditional fiber cloths made from cellulose show a poor antifouling property owing to surface hydrophilicity. In this work, fiber@poly(vinyl silsesquioxane) (POSS) fabric with self-cleaning trait and superhydrophobicity was fabricated via surface ultraviolet (UV) curing (UV-induced click reaction). Its surface micromorphology and elemental distribution were studied. Compared with pristine fiber cloth, POSS-modified fiber cloth can exhibit the superhydrophobic, nonstick, and antifouling traits. Superhydrophobicity of the modified cloth is ascribed to synergy between high surface roughness (cage-like POSS; crosslinked (3-mercaptopropyl)trimethoxysilane; woven fibers) and low-surface energy (Si/-CH 2 -). Self-cleaning property of modified cloth results from superhydrophobicity. After water/surface contact for 60 min, the static water contact angle of modified cloth surface can reach 158.7 ± 1.6°. Superhydrophobic durability of modified cloth reaches 120 h under acid/base/UV irradiation. After 100 abrasion cycles or 1 laundering cycle, the superhydrophobicity is maintained. The novelty of this work is a rapid UV-curing fabrication of self-cleaning POSS-modified fiber cloth. This work might open up a way for preparing advanced self-cleaning garment fabrics. Graphical abstract
研究领域:
材料科学
·
纺织工程
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DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2025
·
IF 7.7
Xiaodi Ye,Cheng Zhan,Ting Sai,Bingtao Wang,Juan Li,Chengfeng Zhang,Yanfei Wang,Zhenghong Guo,Siqi Huo
A sulfonate/silsesquioxane-functionalized nano carbon black (CBSP) was synthesized by grafting polyhedral oligomeric silsesquioxane (POSS) and sulfonate groups onto carbon black (CB) surface, aiming to meet practical requirements of outdoor-used polycarbonate (PC). Upon adding 1 wt% CBSP, PC/1.0CBSP composite displayed a limiting oxygen index (LOI) of 31.3 % with a vertical burning (UL-94) V-0 classification. Its peak heat release rate (PHRR) and total smoke release (TSR) were decreased by 39 % and 21 % relative to PC. The superior fire retardancy can be attributed to the triple reinforced effect from CB, sulfonates and POSS by promoting the formation of denser and more resilient char layers. CBSP well preserved mechanical performances of PC due to its reinforced interfacial compatibility and improved UV shielding through the absorption of UV photons by CB. This work provides a feasible strategy for fabricating fire-retardant PC composites with superior mechanical robustness and UV-resistant properties, expecting to increase applicability and lifespan.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2019
·Vol. 42
·期 7
·1332-1340
·
IF 2.516
Yan Wang,Shujuan Ma,Luwei Zhang,Na Zhang,Yanan Li,Junjie Ou,Yehua Shen,Mingliang Ye
Three monomers, octakis (3-mercaptopropyl) octasilsesquioxane, 1,2,4-trivinylcyclohexane and isophytol were employed to synthesize a novel monolithic stationary phase via photo-initiated thiol-ene click polymerization for reversed-phase liquid chromatography. Several factors such as porogenic system, reaction time and the molar ratio of functional groups were investigated in detail. The resulting poly(POSS- co -TVCH- co -isophytol) monolithic column exhibited suitable permeability for fast separation and outstanding thermal stability. Five alkylbenzenes were employed to evaluate the ability of chromatographic separation of the resulting monolithic columns at different flow rates, and showed the highest column efficiencies of 90,200–93,100 N/m (corresponding to 10.4–10.6 μm of plate height) at a velocity of 0.41 mm/s. The baseline separations of five anilines and eight phenols further proved the applicability of poly(POSS- co -TVCH- co -isophytol) monolithic column in the separation of small molecules.
研究领域:
分析化学
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材料科学
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DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 51
·2208676
·
IF 19.924
Bo Pang,Zuquan Jin,Yunsheng Zhang,Zhiyong Liu,Wei She,Penggang Wang,Yong Yu,Xiaoying Zhang,Chuansheng Xiong,Ning Li,Guowen Sun,Peng Zhao,Guojian Liu,Xiaoyun Song,Song Gao
Cement-based sensors (CBSs) have demonstrated potential in structural health monitoring (SHM) despite rare applications due to their poor flexibility and sensing accuracy/protection with robustness. Herein, a promising strategy is reported to design a waterborne epoxy resin (WEP)-modified cement-based composite coating sensorcapable of simultaneous stable SHM and durable protection. The interpenetrating network (IPN) formed by WEP within cement paste is bionic to the toughness and crack resistance of biological muscle tissue and balances the ion permeation performance and polarization of hydration products. The polymerization-redispersion progress and mechanism of calcium silicate hydrate (C-S-H) gel modified with [3-(2-aminoethylamino)-propyl]trimethoxysilane silsesquioxane (C-POSS) are characterized and revealed. The results show that the muscle-like IPN increases the cement-based coatings’ maximum deflection angle to 30° and improves the monitoring accuracy of compressive, tensile, and fatigue microchanges of concrete structures to more than 95%. The POSS···Ca 2+ ···C-S-H interaction in C-POSS partially transferred the intra-adhesive hydrogen bonds surrounding the nanoconducer into electrostatic bridging ones to maintain an excellent electromechanical conductive dispersion.
研究领域:
土木工程
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材料科学
·
传感器技术
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DOI
高影响因子
Journal of the Mechanical Behavior of Biomedical Materials
·
2019
·
IF 3.485
Zhiming Li,Hongting Zhang,Gang Xiong,Jiancheng Zhang,Ruilu Guo,Liping Li,Haorui Zhou,Guangxin Chen,Zheng Zhou,Qifang Li
Polymerization shrinkage and mechanical properties affect the service life of dental restorative composites. Polyhedral oligomeric silsesquioxanes (POSS) can be an efficient strategy to improve the shrinkage properties and mechanical properties simultaneously. In this work, epoxycyclohexyl POSS (E-POSS) was used to modify the Bis-GMA/TEGDMA dental resins. E-POSS were introduced into the acrylic resin system via ring-opening reaction, and a cationic/free radical hybrid system was obtained. Double bond conversion, glass transition temperature , heterogeneity, crosslink density of dental resins and volumetric shrinkage, water sorption/solubility, flexural strength/modulus of dental composites were investigated. As the introduction of E-POSS caused higher double bond conversion and lower crosslink density, the polymerization shrinkage was significantly reduced to 2.91% (p < 0.05) and the flexural strength increased to 117.19 MPa (p < 0.05) compared to the control sample (5.06%, 99.16 MPa, p<0.05). Lower water sorption and solubility were also observed in composites contained E-POSS (p < 0.05).
研究领域:
材料科学
·
牙科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Haiyang Wu,Birong Zeng,Jinmei Chen,Tong Wu,Yuntong Li,Yongzhou Liu,Lizong Dai
A novel metal–organic-inorganic ternary intramolecular hybrid of N,N′-bis(methylene)-bis(dibenz[C,E][1,2]oxaphosphorin6-oxide)-propylisobutyl-amino-titanium-polyhedral oligomeric silsesquioxanes (Ti-POSS-bisDOPO) was synthesized via a feasible route including the corner-opening, corner-capping and Kabachnik-Fields reactions. The uniqueness of this compound lies in its structural design and has the function of flame retardant. Firstly, one Ti atom has been embedded into the polyhedral oligomeric silsesquioxanes (POSS) cage framework and two dibenz[C,E][1,2]oxaphosphorin6-oxide (DOPO) units with anti-burning functionality have been linked to the aminopropyl group on the corner of siliceous cage. For each molecule, the affinities of Ti-embedded POSS part and DOPO unit are different, which make Ti-POSS-bisDOPO to show the amphiphilicity. Therefore, Ti-POSS-bisDOPO could self-assemble into nanoparticle and achieve good dispersion in epoxy matrix with a particle size varying from 150 nm to 1.5 μm. Secondly, when Ti-POSS-bisDOPO was incorporated into EP matrix, the prepared EP/Ti-POSS-bisDOPO composites exhibited good comprehensive performances. Compared with pure EP, both limited oxygen index and char yield of EP/Ti-POSS-bisDOPO composites were increased greatly at a loading range of 1.5 wt%–6.0 wt%. Meanwhile, the corresponding heat release and smoke production of EP/Ti-POSS-bisDOPO were all reduced. It was observed that the interior layers of char residues were honeycomb-like multilayer structures and the exterior layers were compact, which could effectively hinder the heat transfer and gas diffusion by a barrier effect. Besides, when Ti was doped into the vertex of siliceous cage, it worked by catalyzing char formation, producing thermodynamically stable TiO 2 , and enhancing the flame retardancy. It was deduced that both condensed-phase and gas-phase flame-retardancy made contributions to the flame retardant mechanism. Overall, the metal-embedded and phosphorus-modified Ti-POSS-bisDOPO was a new kind of promising fire retardants in the field of non-halogen flame-retardant polymers.
研究领域:
材料科学
·
化学工程
·
高分子化学
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DOI
高影响因子
GIANT
·
2026
·
IF 6.1
Shun-Shun Zhang,Mao-Long Wang,Tian-Tian Zhang,Maxim V. Bermeshev,Sheng-He Zhang,Igor Jordanov,Yue Su,Xiang-Kui Ren
To address the inherent trade-off between flame retardancy and mechanical properties in polypropylene (PP), a novel polyhedral oligomeric silsesquioxane-based flame retardant (POSS-PPA) was designed and synthesized in this work, and its synergistic effects with melamine polyphosphate (MPP) and piperazine pyrophosphate (PAPP) in PP composites were systematically investigated. Structural characterization confirmed the successful incorporation of phosphate groups onto a typical T8 caged POSS skeleton. Thermogravimetric analysis revealed that the char residue at 800 °C reached 63.9%, significantly higher than that of MPP (49.6%) and PAPP (31.0%). According to UL94 vertical burning tests and cone calorimetry measurements, the composite achieved a V-0 rating at a thickness of 1.6 mm. Notably, the composite containing four parts of the additive exhibited a peak heat release rate (PHRR) of 115.05 kW·m -2 , representing an 87.9% reduction compared to neat PP, while the total smoke production (TSP) was reduced to 190.63 m 2 ·m -2 , corresponding to a 78% decrease. Moreover, its notched impact strength reached 5.46 kJ·m -2 , marking a 22.4% enhancement relative to the composite without the novel flame retardant. This study presents a viable strategy for developing halogen-free flame-retardant PP composites with enhanced flame retardancy, smoke suppression, and mechanical strength.
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2026
·Vol. 61
·期 22
·15756-15772
·
IF 4.4
Hu Jinming,Gao Yuxin,Jiang Yanfeng,Zhao Xinglong,Liu Lijia,Wang Yudan,Wang Guan,Wang Chao,Zhang Chunhong,Yang Guoxing
Polyhedral oligomeric silsesquioxane (POSS) combines the advantages of inorganic nanoparticles and organic flexible segments, enabling the enhancement of the comprehensive properties of epoxy resins. POSS grafted with organic groups can serve as a good toughening curing agent for epoxy resins. In this paper, D/A (polyetheramine D230/aniline) series and D/B (polyetheramine D230/n-butylamine) series co-grafted POSS toughening curing agents were prepared. A series of epoxy resins cured with different curing agents were further prepared. The influence of the structure of grafted small molecule amine and the ratio of polyetheramine/small molecule amine on the properties of cured epoxy resins was discussed. The research results indicated that cured epoxy resins exhibited excellent properties. The toughening effect of curing agent D/A4/OP is the best. Compared to epoxy resins cured with polyetheramine D230, the impact strength maximum increased from 46.3 to 78.2 kJ m⁻ 2 , an increase of 68.9%; the fracture toughness maximum increased from 15 to 24.8 kPa m 1 / 2 , an increase of 65.3%. The toughening curing agents combine the advantages of rigid POSS and flexible polyetheramine. By regulating the side chain structure, distribution, and grafting amount of grafted POSS, the toughness of epoxy resins has been significantly improved. This is due to the synergistic toughening effect of the three-dimensionally distributed flexible polyether segments and the rigid POSS particle structure within the co-grafted POSS. The epoxy resins cured with the toughening curing agents have great potential and applicability, with broad application prospects. Graphical The alternative text for this image may have been generated using AI.
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DOI
高影响因子
ECS Journal of Solid State Science and Technology
·
2026
·Vol. 15
·期 5
·053006
·
IF 2.4
Hui Liu,Anqi Li,Qingnan Chen
The improvement in energy storage performance of graphene/polymer composites has long been restricted by insufficient breakdown strength (Eb) and high dielectric loss, both of which result from conductive losses caused by the aggregation of graphene nanosheets. In this paper, aminopropylisobutyl polyhedral oligomeric silsesquioxane (POSS-NH2) encapsulated graphene oxide (GO) (GO-g-POSS) hybrids were prepared to inhibit the restacking of graphene and block the formation of conductive paths. Furthermore, the design of sandwich-structured films is also an efficient approach to improving the breakdown performance of composite materials. Novel sandwich-structured composite films containing outer layers of BNNS/PVDF films and a middle rGO-g-POSS/PVDF layer were successfully prepared by the layer-by-layer assembly process. The B-0.50-B sandwich-structured composites achieved an optimal discharge energy storage density (Ue) of 9.08 J cm−3 and Eb of 432 MV m−1.
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DOI
高影响因子
危险品化学品经营许可证（带存储）