COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Xiaojing Zhang,Bo Liu,Wenbo Feng,Wangchong Wei,Weiwei Shen,Shaoming Fang,Kaiqi Fan
Conductive composite hydrogels are attracting much attention as artificial skin-like materials, with great potential for applications in wearable electronics, flexible printable electronics, and tissue engineering scaffolds. However, the design of conductive hydrogels possessing multifunctional properties such as excellent mechanical properties , self-healing, high conductivity, low swelling ratio (SR), and high strain sensitivity remains a challenge. Here, we designed and synthesized a polyhedral oligomeric silsesquioxane (POSS)-based composite hydrogel (OCAPS/PAA–Na/PAM) via the copolymerization of acrylamide and an ionic supramolecular monomer consisting of a cationic octa(3–chloroammoniumpropyl) silsesquioxane (OCAPS) core surrounded by sodium acrylate to achieve a combination of high stretchability, low SR, self-healing, high conductivity, biocompatibility, and strain sensing properties. The introduction of OCAPS as a physical crosslinking agent enhanced the toughness and compression properties of the hydrogel. The SR of the OCAPS/PAA–Na/PAM hydrogel was greatly suppressed, with a much lower value (SR: 200 %) than that of the hydrogel without POSS (SR: ~22,000 %). The elongation at break and fracture energy reached 4396 % and 3.7 kJ·m −2 , respectively. OCAPS/PAA–Na/PAM hydrogels also had good self-healing properties due to the sufficient electrostatic interactions and hydrogen bonding between OCAPS and the polymer chains. Moreover, the supramolecular monomers provided abundant ion sites and in-situ generated NaCl , which imparted good electrical conductivity (0.678 mS·cm −1 ) and excellent strain sensitivity (gauge factor = 3.78) to the hydrogel. The OCAPS/PAA–Na/PAM hydrogel could detect electrical signal changes in large strain and small limb deformation and they showed good biological transmission sensitivity, which is expected to contribute to the fields of safety detection, gait detection, and wearable devices .
研究领域:
材料科学
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生物医学工程
·
柔性电子
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2020
·Vol. 29
·期 5
·1566-1575
·
IF 2.572
He Yao,Tian Huafeng,Xiang Aimin,Wang Hailiang,Li Jinlong,Luo Xiaogang,Rajulu A. Varada
Wastewater treatment is one of the focuses in current society, and the removal of heavy metal ions from it is crucial in wastewater treatment. Polyvinyl alcohol (PVA) nanofibers play a certain role in the adsorption of heavy metal ions, but their adsorption capacity is limited. In this work, maleic anhydride (MAH) was first grafted onto the molecular chain of PVA. Then through the condensation of the carboxyl group and the amino group, the octaamino-POSS was successfully grafted on the PVA molecular chain. Two kinds of nanofibers, PVA/octaamino-POSS nanofibers as well as PVA-g-POSS nanofibers, were fabricated by electrospinning technology for the adsorption of Pb 2+ and Cu 2+ in wastewater. The preparation of PVA/octaamino-POSS was used to compare which metal ion adsorption process was more stable, physical blending or chemical grafting. With the increase of contact time, the adsorption capacity of PVA/octaamino-POSS nanofibers to Cu 2+ increased at first and then decreased. It was observed that the adsorption capacity of PVA-g-POSS to heavy metal ions was higher than that of PVA/octaamino-POSS. With the increase of octaamino-POSS content, the equilibrium adsorption of Pb 2+ and Cu 2+ on PVA-g-POSS nanofibers was significantly improved, with prominent adsorption effect for Cu 2+ . Based on the analysis of quasi-first-order and quasi-second-order dynamic equation, it was deduced that the chemical adsorption and physical adsorption worked together in the adsorption process of Pb 2+ and Cu 2+ by PVA-g-POSS, and chemical adsorption played a major role.
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
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Kai Lv,Wei Zhang,Lu Zhang,Zhong-Sheng Wang
To expand the application of solid-state dye-sensitized solar cells (ssDSSCs) to low temperatures, it is necessary to develop new solid electrolytes with low glass transition temperature (Tg). The Tg is regulated by varying the length of alkyl chain that is connected with the nitrogen atom in the imidazolium ring linked to the polyhedral oligomeric silsesquioxane (POSS). The Tg as low as −8.8 °C is achieved with the POSS grafted with methyl-substituted imidazolium. The effect of alkyl group on the conductivity, Tg, and photovoltaic performance has also been investigated. The conductivity and power conversion efficiency increase with the alkyl length, while the Tg first increases and then decreases with the alkyl length. Among the synthesized POSS-based ionic conductors, the POSS grafted with the methyl-substituted imidazolium yields the highest power conversion efficiency of 6.98% at RT due to its highest conductivity, and the efficiency (6.52%) is still good at −4 °C, as its Tg (−8.8 °C) is lower than the working temperature (−4 °C). This finding suggests that the POSS-based solid electrolyte is promising for subzero-temperature applications of ssDSSCs.
研究领域:
材料科学
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能源技术
·
光伏器件
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2013
·
IF 5.008
Hai-Bo He,Bin Li,Jun-Ping Dong,Yun-Yi Lei,Tian-Lin Wang,Qiong-Wei Yu,Yu-Qi Feng,You-Bao Sun
A functionalizable organosiliceous hybrid magnetic material was facilely constructed by surface polymerization of octavinyl polyhedral oligomeric silsesquioxane (POSS) on the Fe3O4 nanoparticles. The resultant Fe3O4@POSS was identified as a mesoporous architecture with an average particle diameter of 20 nm and high specific surface area up to 653.59 m2 g–1. After it was tethered with an organic chain containing dithiol via thiol–ene addition reaction, the ultimate material (Fe3O4@POSS-SH) still have moderate specific area (224.20 m2 g–1) with almost identical porous morphology. It turns out to be a convenient, efficient single adsorbent for simultaneous elimination of inorganic heavy metal ions and organic dyes in simulate multicomponent wastewater at ambient temperature. The Fe3O4@POSS-SH nanoparticles can be readily withdrawn from aqueous solutions within a few seconds under moderate magnetic field and exhibit good stability in strong acid and alkaline aqueous matrices. Contaminants-loaded Fe3O4@POSS-SH can be easily regenerated with either methanol–acetic acid (for organic dyes) or hydrochloric acid (for heavy metal ions) under ultrasonication. The renewed one keeps appreciable adsorption capability toward both heavy metal ions and organic dyes, the removal rate for any of the pollutants exceeds 92% to simulate wastewater with multiple pollutants after repeated use for 5 cycles. Beyond the environmental remediation function, thanks to the pendant vinyl groups, the Fe3O4@POSS derived materials rationally integrating distinct or versatile functions could be envisaged and consequently a wide variety of applications may emerge.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TENSIDE SURFACTANTS DETERGENTS
·
2025
·
IF 1.2
Wenwei Wu,Wenhuan Huang,Zhiguo Sun,Yuqin Tian,Yangwen Zhu,Quan Shi,Zhen Tao,Qingchun Deng,Haoye Cui,Bingang Chen,Yaoguo Wang,Bo Yu
Emerging carbon capture, utilization, and storage (CCUS) technologies have driven the development of advanced nanocomposite materials. In this study, a novel polyhedral oligomeric silsesquioxane (POSS)-based nanomaterial, referred to as FAP, was synthesized using acrylamide, sodium α-olefin sulfonate, and tea saponin as monomers. The structure of the material was confirmed by transmission electron microscopy (TEM), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and silicon nuclear magnetic resonance spectroscopy ( 29 Si NMR), revealing a well-defined cage-like cubic architecture. TEM images clearly displayed the cage-like structure of the POSS material in FAP, while energy dispersive spectroscopy (EDS) confirmed the presence of silicon (Si) elements. Thermogravimetric analysis (TGA) showed that the incorporation of POSS materials improved the thermal resistance of FAP. The nanomaterials significantly improved the foaming performance and foam stability. The foam generated by FAP reached a height of 480 mL, with a half-life of 10 h under conditions of 120 °C and a salinity of 100,000 mg L −1 , showing excellent properties. Furthermore, the foam was regenerable in the presence of 20 % kerosene and maintained good foaming performance. Microscopic mechanism analysis indicated that the POSS nanomaterials compressed the electrical double layer of the polymer, reduced the particle size, increased the liquid film thickness, and markedly improved the foam stability. Under the influence of activators, the gel viscosity of FAP exceeded 100 mPa s, which significantly improved the underground sealing efficiency of CO 2 . The novel nanocomposite material exhibited integrated capabilities for CO 2 foaming, foam stabilization, and storage. The optimal concentration of the FAP foaming agent was 0.75 %, resulting in a 32.75 % increase in recovery efficiency, a resistance factor of 18.9, and a CO 2 storage rate of 12.59 %. The development of this nanocomposite material provides technological support for effectively mitigation of CO 2 channeling during CO 2 flooding and promotes the wider application of CO 2 flooding technology.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2020
·
IF 4.231
Hui Zhao,Si-Qi Zhao,Qing Li,Muhammad Rafiullah Khan,Yang Liu,Peng Lu,Chong-Xing Huang,Li-Jie Huang,Tao Jiang
Polyhedral oligomeric silsesquioxane (POSS) functionalized with an amine group was designed and prepared. Then it was applied as a physical cross-linker to prepare waterborne thermoplastic polyurethane (WTPU)/POSS nanocomposite. Results revealed that the POSS had a little influence on the viscosity and storage stability of the WTPU/POSS dispersions. Moreover, the cured nanocomposite film with 8 wt% POSS showed superior surface hydrophobicity , the water contact angle was higher than 121° due to the migration of POSS on the surface, while the tensile strength increased up to 6.7 MPa and the elongation at break was higher than 800%. Dynamic thermomechanical analysis (DMA) results revealed a significant increase in the glass transition temperature (Tg) of the nanocomposite, the dielectric constant decreased from about 2.60 to 1.83. This POSS can made the polymer with excellent physical properties and low dielectric constant, which could be applied in integrated circuitry micro devices.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2019
·
IF 6.309
Wangchang Li,Wei Huang,Yue Kang,Yu Gong,Yao Ying,Jing Yu,Jingwu Zheng,Liang Qiao,Shenglei Che
Modified cyanate resins (G-CE) and functionalized silica fibers (K-SFs) were obtained by introducing glycidyl polyhedral oligomeric silsesquioxane (G-POSS) and γ -aminopropyltriethoxy silane coupling agent (KH-550), respectively. G-CE and K-SFs were then used to fabricate K-SFs/G-CE wave-transparent composites. The activation energy of the G-CE blends decreased to 49.80 kJ/mol, which led to a decrease in the curing temperature from 274 °C to 254 °C. The contact angle of the functionalized silica fibers increased considerably to 107.4°; this modified the interfacial compatibility, which enhanced the mechanical properties . The K-SFs/G-CE composite had a maximum flexural strength of 548.1 MPa and flexural modulus of 19.3 GPa, which were increases of 86.7% and 48.5% compared to the corresponding values of SFs/CE composite (flexural strength of 293.5 MPa and flexural modulus of 13.0 GPa). In addition, the ε and tan δ of the K-SFs/G-CE composite decreased to 2.63 and 3.3 × 10 −3 , respectively, which were respective decreases of 6.5% and 23.0% compared with the corresponding values of SFs/CE composite ( ε of 2.76 and tan δ of 4.6 × 10 −3 ). Hence, the resulting K-SFs/G-CE composites are good candidate materials for high performance wave-transparent composites.
研究领域:
材料科学
·
复合材料工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Bio Materials
·
2021
·
IF 0
Renqi Guo,Ying Zhou,Siju Liu,Chuang Li,Cuifen Lu,Guichun Yang,Junqi Nie,Feiyi Wang,Nian-Guo Dong,Jiawei Shi
Calcification of bioprosthetics is a primary challenge in the field of artificial heart valves and a main reason for biological heart valve prostheses failure. Recent advances in nanomaterial science have promoted the development of polymers with advantageous properties that are likely suitable for artificial heart valves. In this work, we developed a nanocomposite polymeric biomaterial POSS–PEG (polyhedral oligomeric silsesquioxane-polyethylene glycol) hybrid hydrogel, which not only has improved mechanical and surface properties but also excellent biocompatibility. The results of atomic force microscopy and in vivo animal experiments indicated that the content of POSS in the PEG matrix plays an important role on the surface and contributes to its biological properties, compared to the decellularized porcine aortic valve scaffold. Additionally, this modification leads to enhanced protection of the hydrogel from thrombosis. Furthermore, the introduction of POSS nanoparticles also gives the hydrogel a better calcification resistance efficacy, which was confirmed through in vitro tests and animal experiments. These findings indicate that POSS–PEG hybrid hydrogel is a potential material for functional heart valve prosthetics, and the use of POSS nanocomposites in artificial valves may offer potential long-term performance and durability advantages.
研究领域:
生物医学工程
·
心血管医学
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材料科学
✓ 已验证
DOI
PubMed
RSC Advances
·
2015
·Vol. 5
·期 28
·21580-21587
·
IF 3.84
Zhenghe Zhang,Lizhi Hong,Jinxia Li,Feng Liu,Haibo Cai,Yun Gao,Weian Zhang
Poly(maleimide isobutyl polyhedral oligomeric silsesquioxane-alt-vinylbenzyl polyethylene glycol) (P(MIPOSS-alt-VBPEG)) amphiphilic copolymer brushes with a sequence of alternating MIPOSS and polyethylene glycol (PEG) side chains were synthesized via ordinary radical polymerization and reversible addition–fragmentation transfer (RAFT) polymerization. A series of alternating copolymer brushes prepared by RAFT polymerization had a low polydispersity index (PDI) of less than 1.25. The thermal properties of these copolymers were evaluated by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The results displayed that the MIPOSS units could effectively enhance the thermal properties of the hybrid copolymers. The self-assembly behavior of the P(MIPOSS-alt-VBPEG) amphiphilic copolymer brushes in aqueous media was also studied by fluorescence spectrophotometry (FS), transmission electron microscopy (TEM) and dynamic light scattering (DLS). The results showed that these alternating copolymer brushes could form spherical aggregates in water.
研究领域:
高分子化学
·
纳米材料科学
·
胶体与界面化学
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生物材料
·
药物传递系统
✓ 已验证
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2025
·Vol. 31
·期 12
·e202404538
·
IF 3.7
Yang Meng,Wen Li,Lingji Zhang,Mario Berrettoni,Hongzhong Zhang,Xiaojing Zhang
Graphical This study develops pH-responsive SA/PEGDA/AS-POSS hydrogels through Michael addition reactions to achieve controlled drug release and enhanced mechanical properties. The hydrogels exhibit tunable swelling and degradation behaviors under various pH conditions, demonstrating their potential for targeted drug delivery. These hydrogels offer promising prospects for biomedical applications, providing efficient drug loading, controlled release, and improved mechanical strength. In this study, thiolated sodium alginate (SA) and hydrophilic, polymerizable Janus-type polyhedral oligomeric silsesquioxane (AS-POSS) are synthesized by introducing thiol and sulfonic acid groups, respectively. A series of pH-responsive SA/PEGDA/AS-POSS nanocomposite hydrogels are successfully prepared through Michael addition reactions between the thiol groups of thiolated sodium alginate and the double bonds in the molecular chains of AS-POSS and poly(ethylene glycol) diacrylate (PEGDA). This reaction proceeds rapidly under physiological conditions without requiring initiators or catalysts. As the content of AS-POSS increases, the pore size within the hydrogel decreases, and the network structure becomes denser, with significant improvements in mechanical properties. The hydrogel exhibits excellent pH sensitivity, showing lower swelling in acidic media compared to neutral media, and undergoing hydrolysis and losing stability in alkaline media. Moreover, the incorporation of AS-POSS significantly enhances the drug-loading capacity (85.7 %) and encapsulation efficiency (72.1 %) of doxorubicin (DOX). The drug is released faster in weakly acidic environments, with a cumulative release rate reaching 80.4 %, demonstrating excellent targeting and controlled release properties. Cytotoxicity tests show that the SA/PEGDA/AS-POSS hydrogel has good biocompatibility and exhibits effective tumor-killing ability, indicating its great potential as a drug carrier with promising applications in biomedical materials.
研究领域:
生物材料
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药剂学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHOTOPOLYMER SCIENCE AND TECHNOLOGY
·
2017
·Vol. 30
·期 1
·25-31
·
IF 0.791
Chengxiang Zhang,Tingxi Li,Hui Song,Yongqin Han,Haibo Su,Yanmin Wang,Qing Wang
To improve the mechanical property of epoxy resin (EP) had received intensive attentions in engineering industries at present. For this reason, three kinds of epoxy resin nanocomposites were prepared by incorporating different POSS nanoparticles. This study showed the toughening effect of three kind of nanocomposites and analyzed the different toughening mechanism. The thermomechanical properties and impact strength of the samples were investigated by means of dynamic thermomechanical analysis (DMA) and XJJ-50 type tester. The thermal stability was examined by thermal gravimetric analysis (TGA) and scanning electron microscopy (SEM) was used to characterize the morphology of fracture surfaces for composites. When introduction of Octavinyl-POSS (OV-POSS), DodecaPhenyl-POSS (DP-POSS) and Methacryl-POSS (M-POSS) was 1.0 phr, the values of impact strength reach 22.60 kJ/m2, 24.90 kJ/m2, 29.61 kJ/m2 and the values of storage modulus get to 2.88 GPa, 2.25 GPa, 2.14 GPa respectively. It can be observed that M-POSS has the most obvious effect when introduced into the same amount of POSS. Meanwhile, adding nanoparticles has no obvious impact on the excellent thermal stability of EP.
研究领域:
材料科学
·
纳米技术
·
高分子科学
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2017
·
IF 3.684
Pengcheng Zhang,Zhenghe Zhang,Xiaoze Jiang,Leilei Rui,Yun Gao,Weian Zhang
A biotin-functionalized amphiphilic star-shaped block copolymer , POSS-(PCL- b -PDMAEMA) 8 -biotin, with an inorganic POSS nucleus, a hydrophobic poly( ɛ -caprolactone) (PCL) middle layer, a hydrophilic poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) outer corona was synthesized for the targeting delivery and pH-responsive release of hydrophobic pheophorbide A (PPa) photosensitizers . In aqueous solution, this amphiphilic copolymer was able to form unimolecular micelles as determined by transmission electron microscopy (TEM) and dynamic light scattering (DLS). The biotin-functionalized unimolecular micelles were responsive to pH and further utilized in encapsulation and release of PPa for photodynamic therapy (PDT). The PPa release from PPa-loaded unimolecular micelles could be enhanced at acidic condition. Additionally, confocal laser scanning microscopy (CLSM) and flow cytometry results revealed that PPa-loaded tumor-targeted unimolecular micelles could boost the internalization rate in HeLa cells effectively. Moreover, PPa-loaded unimolecular micelles showed low dark toxicity and high PDT efficacy towards HeLa cells according to the 3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide (MTT) assay. Thus, PPa-loaded POSS-(PCL- b -PDMAEMA) 8 -biotin would have presented the potential application in PDT.
研究领域:
材料科学与工程
·
生物医药
·
纳米医学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）