JOURNAL OF CHROMATOGRAPHY A
·
2019
·
IF 3.858
Ruifeng Peng,Ziqing Zhou,Qian Wang,Qiongwei Yu,Xiaoxia Yan,Haixiao Qin,Yunyi Lei,Haibo He,Liqiang Luo
A template anchoring strategy for high performance molecularly imprinting materials (MI-materials) was displayed in the present work, which involved efficient usage of template molecules with the aid of functional monomer grafted on the support. The imprinting polymerization process was carried out on the surface of carboxyl functionalized Fe 3 O 4 @POSS (Fe 3 O 4 @POSS-COOH) anchoring with tetracycline templates as a demonstration. In this strategy, Fe 3 O 4 @POSS-COOH was first prepared via a simple copolymerization between methacrylic acid (MAA) and the residual end vinyl groups of Fe 3 O 4 @POSS. The carboxyl groups immobilized on Fe 3 O 4 @POSS surface can drive tetracycline templates into the formed polymer layers through hydrogen interactions between tetracycline and the functionalized monomer. The occupation of assembled tetracycline templates on the surface of Fe 3 O 4 @POSS-COOH directed the selective occurrence of imprinting polymerization through copolymerization of vinyl end groups of Fe 3 O 4 @POSS, leading to the formation of tetracycline imprinted nanocomposite with a high density of effective recognition sites. The obtained MI-material exhibited high capacity and favorable selectivity towards tetracycline antibiotics. By applying the proposed MI-material as magnetic solid phase extraction adsorbents, four tetracyclines were prominently enriched from milk samples. The MI-material based analytical platform was sensitive for the determination of TCs in milk samples with LOD values in the range of 2.23–26.84 ng mL −1 and recoveries ranged from 86.2% to 105.7%. This work proposed an improved strategy for preparing efficient MI-materials based on Fe 3 O 4 @POSS, which provides a new insight into the chemical properties of Fe 3 O 4 @POSS.
研究领域:
材料科学
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分析化学
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药物分析
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DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 89
·86012-86018
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IF 3.289
Mengmeng Li,Xiaoyan Song,Tingbin Zhang,Lintao Zeng,Jinfeng Xing
In this study, an organic–inorganic temperature-sensitive polymer encapsulating tetraphenylethene (TPE) was designed. Its fluorescence intensity is sensitive to temperature changes and reaches a maximum at normal cell temperature. Firstly, the organic–inorganic hybrid polymer, polyhedral oligomeric silsesquioxane-based-poly(N-isopropylacrylamide) (POSS-b-PNIPAM) with a particular LCST of 37.5 °C, was synthesized by atom transfer radical polymerization. POSS-b-PNIPAM self-assembled in aqueous solutions to form stable micelles and then TPE was assembled into the micelles in water. The fluorescence intensity of TPE encapsulated in POSS-b-PNIPAM can be tuned by changing the temperature. The fluorescence intensity of TPE encapsulated in POSS-b-PNIPAM reached a maximum at 37 °C, which is much higher than the TPE fluorescence intensity at the same temperature. TPE encapsulated in POSS-b-PNIPAM still showed high fluorescence intensity after entering HeLa cells at 37 °C.
研究领域:
材料科学
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高分子化学
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生物医学工程
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 54
·期 7
·5877-5897
·
IF 2.993
Zhang Jiancheng,Li Liping,Guo Ruilu,Zhou Haorui,Li Zhiming,Chen Guangxin,Zhou Zheng,Li Qifang
Methacryloxypropyl-polyhedral oligomeric silsesquioxane (MAP-POSS) was photopolymerized with the tri- or tetra-functional thiol monomer in different stoichiometry. A novel inorganic–organic methacrylate hybrid material with highly cross-linked network and high performance was synthesized by UV-initiated thiol–ene click chemistry. SEM–EDAX images and XRD diffractograms showed that no agglomeration of MAP-POSS was observed, indicating MAP-POSS dispersed uniformly in the hybrid materials. Real-time FTIR was employed to monitor the conversion of thiol and methacrylate as a function of irradiation time, and the results revealed that highly thiolated monomer could promote the conversion of methacrylate effectively because of stronger chain propagation capability. The TGA indicated that the hybrid materials had high thermal stability of which the onset decomposition temperature rose to 350 °C, approximately 50 °C higher than that of the traditional UV-cured epoxy acrylate/triethylene glycol dimethacrylate (EA/TEGDMA, 70:30 w/w) resin. The highest glass transition temperature ( T g ) of the hybrid materials was 76.2 °C. Compared with traditional EA/TEGDMA resins, the novel hybrid materials consisted of MAP-POSS had fast curing rate, high mechanical properties and thermal stability which made the wider practical applications of UV-cured hybrid materials feasible.
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2024
·Vol. 26
·期 15
·11498-11505
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IF 2.9
Jiannan Sun,Ke Yan,Aizhao Pan,Pan Zhang,Xuehang Chen,Xinyi Shi,Chengyu Shi
Fluorescence nanothermometry based on quantum dots is a current research hotspot for novel non-contact temperature monitoring, and is of vital significance for the modulation and design of the sensing properties of sensors. Herein, a design strategy to modulate the temperature-sensing characteristics of quantum dots based on the thickness of a shell is proposed. In this study, CdSe/ZnS quantum dot/POSS-based temperature probe films with varying fluorescence characteristics were developed, and the influence of the ZnS shell on temperature sensing was examined by varying the thickness of the ZnS shell. The temperature dependency, linearity, range of applications, and reversibility of quantum dot thin film probes were all considerably regulated by the ZnS shell, according to research on quantum dot/POSS-based films coated with various shell thicknesses. The CdSe/ZnS temperature probe with 4 monolayers (MLs) stood out among the rest due to its strong thermal stability (at least 5 cycles), large usable temperature range (20–80 °C), and excellent temperature sensitivity (R2 > 0.994). The results demonstrated that the temperature sensing performance of quantum dots was the consequence of the combined effect of multiple temperature response properties induced by the thickness of the shell, and the shell control of quantum dots to optimize the temperature sensing performance was an essential approach for the design of temperature probes. This work demonstrates the great potential of the shell in tuning the temperature sensing performance of quantum dots and provides a viable approach for the design of quantum dot temperature probes.
研究领域:
材料科学
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纳米技术
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传感器技术
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DOI
PubMed
高影响因子
POLYMER COMPOSITES
·
2024
·
IF 4.8
Lei Xie,Hongqiang Zhang,Yujian Liu,Yan Zhang
High thermal conductivity ( λ ) composite with excellent dielectric, mechanical, and thermal properties are critical to the reliability and safety of electrical devices. However, the excessive addition of thermal conductive fillers may lead to severe performance degradation. Heterogeneous structured alumina-hexagonal boron nitride nanosheets (Al 2 O 3 @BNNS) fillers were prepared by electrostatic self-assembly method. Owing to synergistic effect of spherical Al 2 O 3 and sheet BN, and much low interface thermal resistance, λ of the epoxy resin with 20 wt% Al 2 O 3 @BNNS 2 is raised to 0.84 W·m −1 ·K −1 , 86.67% higher than that of Al 2 O 3 /BN/EP composite. Furthermore, epoxy-based polyhedral oligomeric silsesquioxane (EP-POSS) was incorporated to further optimize dielectric property of the composite. The λ of the composite is slightly decreased, but the dielectric constant and dielectric loss are reduced to 2.954 and 0.01058, respectively, due to the unique cage structure of EP-POSS and excellent compatibility of EP-POSS with the matrix. The composite also exhibits favorable mechanical properties with an impact strength of 86.2 MPa and a bending strength of 7.81 kJ·m −2 , as well as outstanding thermal stability, suggesting its promising prospects for advanced electronic devices. Highlights f Al 2 O 3 and f BNNS electrostatic self-assemble into heterostructured fillers. The λ of Al 2 O 3 @BNNS 2 /EP composite is much higher than the others. The cage-like EP-POSS is used to improve dielectric properties of the epoxy resin. The ε and tan δ of composites at 1 MHz are only 2.954 and 0.01058, respectively.
研究领域:
材料科学
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电子工程
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高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Hao Wu,Rule Deng,Yongmei Xia,Fangrui Xie,Jing Dong,Liang Xu,Yongbing Pei,Lianbin Wu
In the aerospace field, silicone resin (SR) primers face challenges such as insufficient adhesion, limited thermal stability, and poor flame-retardancy. To overcome these drawbacks, a liquid highly reactive octaethoxylated polyhedral siloxanes (EtO-POSS) was developed via a thiol-ene click reaction then introduced into SR to construct a covalently cross-linked three-dimensional organic-inorganic hyperbranched network. This strategy utilizes the hydrolysis-condensation reaction between the ethoxyl groups on EtO-POSS and alkoxy groups of the resin, together with the hydroxyl groups on the metal substrate surface, to form strong chemical bonds at the interface, thereby enhancing the primer's mechanical strength, interfacial adhesion, and thermal stability. The results show that with 4 wt% EtO-POSS, the EtO-POSS@SR composites achieves a tensile strength of 3.49 MPa and an adhesive strength of 2.22 MPa, which increase 39% and 48% compared with pure SR, respectively. At an addition rate of 10 wt%, the flame retardancy rating reaches UL-94 V-0. Besides, the possible mechanism was proposed by investigating the combustion residues of EtO-POSS@SR composites. Thus, this work provides a feasible molecular design and strategy for developing high-performance and multifunctional silicone resin primers for potential applications. Download: Download high-res image (243KB) Download: Download full-size image
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高影响因子
Nanomaterials
·
2026
·Vol. 16
·期 3
·164
·
IF 4.3
Chao Meng,Xiaofeng Hao,Shuanjin Wang,Dongmei Han,Sheng Huang,Jin Li,Min Xiao,Yuezhong Meng
High-temperature proton exchange membranes (HT-PEMs) are critical components of high-temperature fuel cells, facilitating proton transport and acting as a barrier to fuel and electrons; however, their performance is hampered by persistent issues of phosphoric acid leaching and oxidative degradation. Herein, a novel HT-PEM with abundant hydrogen bond network is constructed by incorporating nanoscale polyhedral oligomeric silsequioxane functionalized with eight pendent sulfhydryl groups (POSS-SH) into poly(4,4′-diphenylether-5,5′-bibenzimidazole) (OPBI) matrix. POSS, a cage-like nanostructured hybrid molecule, features a well-defined silica core and highly designable surface organic groups, offering unique potential for enhancing membrane performance at the molecular level. Through controlled reactions between sulfhydryl groups and allyl glycidyl ether (AGE), two functional POSS crosslinkers—octa-epoxide POSS (OE-POSS) and mixed sulfhydryl-epoxy POSS (POSS-S-E)—were synthesized. These were subsequently used to fabricate crosslinked OPBI membranes (OPBI-OE-POSS and OPBI-POSS-S-E) via epoxy–amine coupling. The OPBI-POSS-S-E membranes demonstrated exceptional oxidative stability, which is attributed to the free radical scavenging ability of the retained sulfhydryl groups on the nano-sized POSS framework. After soaking in Fenton’s reagent at 80 °C for 108 h, the OPBI-POSS-S-E-20% membrane retained 79.4% of its initial weight, significantly surpassing both the OPBI-OE-POSS-20% and pristine OPBI membranes. The PA-doped OPBI-POSS-S-E-20% membrane achieved a proton conductivity of 50.8 mS cm−1at 160 °C, and the corresponding membrane electrode assembly delivered a peak power density of 724 mW cm−2, highlighting the key role of POSS as a nano-modifier in advancing HT-PEM performance.
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PubMed
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2026
·
IF 9.9
Rui Yuan,Chang Tu,Zhicheng Zhang,Jing Yuan,Bingxin Liu,Lei Chen,Li Ji
Designing nanoflakes with advantageous three-dimensional cross-linked structures is one of the effective measures to improve reinforcement performance. Herein, crosslinked “fish-net” shaped octaglycidylether polyhedral oligomeric silsesquioxane-functionalized graphene oxide (OGPOSS-GO) was prepared to obtain polyimide (PI) composites coatings with both wear-resistant and corrosion resistance. GO/PI and uncrosslinked monoaminopropylisobutyl POSS (MAPOSS) were obtained using the same methods for comparative explorations. The results show that incorporating OGPOSS-GO into PI resin improve the hardness, wear resistance and corrosion resistance of PI, with enhancement effects far superior to those of the uncrosslinked MAPOSS-GO. MD simulations corroborate the experimental observations and further elucidate the mechanism behind the superior reinforcing properties of OGPOSS-GO by analyzing changes in energy, structure, density, stress, and diffusion rate during friction and corrosion processes. The study found that OGPOSS-GO, with its three-dimensional cross-linking structure, can bind more PI chains through a “fish-net” structure, achieving self-binding effects that increase coating density, thereby improving the hardness, tribological properties and corrosion resistance of the coating. Our study provides new insights into the molecular structure design of nanoflakes.
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高影响因子
POLYMER
·
2026
·
IF 5.1
Mingxuan He,Gengchen Yang,Shijie Liu,Ziwen Sun,Jinfeng Tian,Shitian Han,Weiyi Ding,Shuang Xia,Huawei Zou
A POSS-grafted epoxy-terminated hyperbranched polysiloxane was synthesized. • The reactive PEHP modifier formed a covalently bonded rigid-flexible epoxy network. • The modified epoxy achieved 112.26 MPa tensile strength at 77 K, a 22.4% increase. • The elongation at break at 77 K reached 2.19%, corresponding to a 37.7% increase. • Multiscale toughening arose from free-volume pore and Si-rich microphase domains. The brittleness of epoxy resins at cryogenic temperatures severely limits their reliable use in extreme engineering environments. Herein, a POSS-grafted epoxy-terminated hyperbranched polysiloxane (PEHP) was synthesized and employed to toughen epoxy resin, aiming to better satisfy the application requirements under extremely low-temperature conditions. Using POSS as a rigid multi-site core, a hybrid rigid-flexible dendritic branching structure of PEHP was constructed with precisely controlled molecular weight through alternating hydrosilylation and Piers-Rubinsztajn (PR) reactions. The modified epoxy resin exhibits an approximate 77.8% increase in room-temperature elongation at break and a 55.6% increase in fracture toughness. More importantly, at an extremely low temperature (77 K), its tensile strength, elongation at break, and fracture toughness increase by 22.4%, 37.7%, and 49.7%, respectively, compared to pure epoxy resin. This exceptional low temperature toughness stems from the synergistic interaction between rigid and flexible components at multiple scales. The bulky functionalized POSS disrupts local chain packing upon incorporation into the network, thereby enlarging the free-volume pore size and enhancing local chain mobility. The rigid core pins the crack front and promotes bowing to enhance fracture resistance, while flexible siloxane side chains increase chain mobility. Microphase separated domains further induce shear yielding under stress concentration and blunt the crack tip, impeding propagation. This synergistic multiscale dissipation mechanism gives the epoxy resin excellent cryogenic toughness, showing great potential for applications in extremely low temperature conditions. Download: Download high-res image (243KB) Download: Download full-size image
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高影响因子
Coatings
·
2025
·Vol. 15
·期 7
·745
·
IF 2.8
Wudi Zhang,Zian Wang,Zhixuan Zhao,Xuan Zhou,Lixin Wu,Zixiang Weng
Anti-icing glass is particularly important for applications where ice formation can pose safety risks or impair functionality. The challenge of anti-icing modification for glass lies in maintaining water repellency while addressing the issue of transparency and durability. In this work, leveraging the robustness and wear resistance of inorganic/organic composite materials, a highly transparent coating, with strong adhesive properties to glass substrates and repellency to liquids has been developed. Briefly, 3-glycidoxypropyl polyhedral oligomeric silsesquioxane (GPOSS) is employed as a precursor to fabricate a high-strength, high-transparency coating through modification with acrylic acid and perfluorooctyl acrylate. The inorganic component imparts strength and wear resistance to the coating, while the organic component provides hydrophobic and near oleophobic features. Furthermore, a custom-built mechanical test instrument evaluated the absolute value of the de-icing shear force. The results reveal that at −20 °C, the fluorinated modified coating only exhibit a minimum de-icing pressure of 40.3 kPa, which is 75% lower than the unmodified glass substrate. As-prepared coating exhibits a transmittance of up to 99% and can endure a high-pressure water impact of 30 kPa for 1 min without cracking. Compared to existing anti-icing coating methods, the core innovation of the fluorinated GPOSS-based coating developed in this study lies in its inorganic/organic composite structure, which simultaneously achieves high transparency, mechanical durability, and enhanced anti-icing performance.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jiaqi Lou,Yimeng Yang,Chengji Zhao
Recent advancements in smart medical and artificial intelligence (AI) technologies have sparked growing interest in flexible electronic devices, particularly humidity sensors for wearable and bio-health monitoring applications. Ionic liquids have been widely reported as humidity sensitive materials for flexible humidity sensors due to their strong hydrophilicity and high ionic conductivity, However, they are hindered by slow response speed and poor stability in humid environments. In this study, POSS-based amphoteric ionic liquids were synthesized by acid catalysis, and they were then incorporated into the hydrophobic polyvinylidene fluoride (PVDF) matrix for addressing above challenges of ionic liquid-based sensor. The modified PVDF/POS-Prs-TFSI humidity sensor exhibits high linearity (R 2 = 0.95), high sensitivity (0.06), fast response/recovery (0.2/14.7 s), and low hysteresis within 11 %–97 % RH (6.1 % RH), along with excellent flexibility and resistance to gas interference. The enhanced humidity-sensing performance after modification is attributed to ionic-dipole interactions occurring between the -CF₃ groups in PVDF and the imidazolium groups within POS-Prs-TFSI. Based on its excellent performance and low-cost solution processing, this sensor can be integrated into masks and skin patches for scalable production. It meets the demand for economical, high-precision humidity monitoring in consumer electronics and healthcare, enabling applications in breath analysis, skin hydration, and sweat monitoring. Additionally, it extends to plant leaf humidity detection, showing strong market potential in smart wearables, telemedicine, and precision agriculture.
研究领域:
材料科学
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传感器
·
生物医学工程
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柔性电子学
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智能可穿戴设备
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医疗人工智能
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消费电子
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远程医疗
·
精准农业
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高影响因子
Nanoscale
·
2017
·Vol. 9
·期 35
·12874-12884
·
IF 7.367
Ya-Xuan Zhu,Hao-Ran Jia,Zhan Chen,Fu-Gen Wu
Photodynamic therapy (PDT) has drawn extensive attention as a promising cancer treatment modality. However, most PDT nanoagents suffer from insufficient drug loading capacity, a severe self-quenching effect, premature release of drugs and/or potential toxicity. Herein, we rationally designed an inorganic–organic nanohybrid with high drug loading capacity and superior chemical stability for enhanced PDT. Polyhedral oligomeric silsesquioxane (POSS), an amine-containing cage-shaped building block, was crosslinked with chlorin e6 (Ce6), a carboxyl-containing photosensitizer, via the amine–carboxyl reaction. Polyethylene glycol (PEG) polymers were further modified on the surface of the nanoparticle to improve the aqueous dispersibility and prolong the circulation time of the final nanoconstruct (POSS-Ce6-PEG). The as-prepared POSS-Ce6-PEG has a considerably high loading rate of Ce6 (19.8 wt%) with desirable fluorescence emission and singlet oxygen generation. Besides, in vitro experiments revealed that the nanoagent exhibited enhanced cellular uptake and a preferred intracellular accumulation within mitochondria and the endoplasmic reticulum, resulting in high anticancer efficiency under light irradiation. Furthermore, in vivo imaging-guided PDT was also successfully achieved, showing the effective tumor targeting and ablation ability of POSS-Ce6-PEG. More importantly, the nanoagent possesses negligible dark cytotoxicity and systemic side effects. Therefore, POSS-Ce6-PEG as an eligible PDT theranostic agent holds great potential in clinical applications.
研究领域:
纳米技术
·
癌症治疗
·
材料科学
·
生物医学工程
·
药剂学
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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）