TALANTA
·
2024
·
IF 5.6
Hongzhi Hu,Yanshu Zhang,Yufei Hu,Ling Xia,Gongke Li
In analysis of complex samples, the stability and sensitivity of surface-enhanced Raman scattering (SERS) substrates may be compromised by matrix interference. To address this issue, a membrane substrate was prepared for fast enrichment, separation, and detection of chrysoidine all-in-one. The silver nanoparticles modified sulfur-containing POSS polymer (AgNPs/POSS-P-S) SERS membrane substrate was fabricated using polyhedral oligomeric silsesquioxane (POSS) as support materials. Through in-situ growth, AgNPs were uniformly modified on POSS-P-S to ensure the stability and SERS activity of the membrane substrate. The enhancement factor of the malachite green was up to 5.3 × 10 5 . By loading the AgNPs/POSS-P-S on membrane, on the other hand, the SERS membrane substrate can also serve as an adsorption medium for separating chrysoidine from sample matrix. Furthermore, the specific sensing mechanism of AgNPs/POSS-P-S for chrysoidine was investigated and a fast, sensitive, and selective method for its quantification was established, with a linear range of 0.010–2.0 mg/L and the limits of detection at 3.7 μg/L. In addition, the SERS method was successfully applied for the analysis of chrysoidine in beverages and chili products with the recoveries in the range of 83.5%–113.4 % and the relative standard deviations in 3.2%–9.0 %. The proposed AgNPs/POSS-P-S membrane based SRES method has great potential for rapid chrysoidine analysis in food samples.
研究领域:
分析化学
·
食品安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2019
·
IF 3.621
Heling Li,Jinchi Dai,Qi Xu,Cuifen Lu,Guichun Yang,Feiyi Wang,Junqi Nie,Xingjian Hu,Nianguo Dong,Jiawei Shi
A series of high-strength and hydrolytic degradable POSS-PEG hybrid hydrogels were successfully fabricated by Michael addition reaction of 4-arm-PEG-maleimide with thiol-terminated PEG-functionalized POSS cross-linkers in aqueous phase. The cross-linkers, which are hydrophilic, multifunctional and contain esters, were prepared by linking hydrophilic PEG with different chain length onto hydrophobic POSS and terminating with a thiol group. All the prepared hybrid hydrogels were achieved with a porous structure and high mechanical strength, and the G′ of POSS-PEG 500 hybrid hydrogel reached a maximum of 15,000 Pa, which is much higher than our previous POSS-PEG hybrid hydrogels prepared by monofunctional POSS. The swelling ratio and hydrolytic degradation rate of hybrid hydrogels increased with the increase of PEG chain length. In vitro cell culture showed that all the hybrid hydrogels had good biocompatibility. Thus, these hybrid hydrogels exhibited the potential for tissue engineering scaffolds.
研究领域:
材料科学
·
生物医学工程
·
组织工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Leisha Cui,Zun Yang,Jing Hong,Zhanchi Zhu,Zhaojun Wang,Zhongqing Liu,Wenlong Zheng,Ying Hao,Jinlin He,Peihong Ni,Guosheng Cheng
The limited self-repair capacity of articular cartilage has motivated the development of stem cell therapy based on artificial scaffolds that mimic the extracellular matrix (ECM) of cartilage tissue. In view of the specificity of articular cartilage, desirable tissue adhesiveness and stable mechanical properties under cyclic mechanical loads are critical for cartilage scaffolds. Herein, we developed an injectable and degradable organic–inorganic hybrid hydrogel as a cartilage scaffold based on polyhedral oligomeric silsesquioxane (POSS)-cored polyphosphate and polysaccharide. Specifically, acrylated 8-arm star-shaped POSS-poly(ethyl ethylene phosphate) (POSS-8PEEP-AC) was synthesized and cross-linked with thiolated hyaluronic acid (HA-SH) to form a degradable POSS-PEEP/HA hydrogel. Incorporation of POSS in the hydrogel increased the mechanical properties. The POSS-PEEP/HA hydrogel showed enzymatic biodegradability and favorable biocompatibility, supporting the growth and differentiation of human mesenchymal stem cells (hMSCs). The chondrogenic differentiation of encapsulated hMSCs was promoted by loading transforming growth factor-β3 (TGF-β3) in the hydrogel. In addition, the injectable POSS-PEEP/HA hydrogel was capable of adhering to rat cartilage tissue and resisting cyclic compression. Furthermore, in vivo results revealed that the transplanted hMSCs encapsulated in the POSS-PEEP/HA hydrogel scaffold significantly improved cartilage regeneration in rats, while the conjugation of TGF-β3 achieved a better therapeutic effect. The present work demonstrated the potential of the injectable, biodegradable, and mechanically enhanced POSS-PEEP/HA hybrid hydrogel as a scaffold biomaterial for cartilage regeneration.
研究领域:
生物材料
·
组织工程
·
再生医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2022
·Vol. 33
·期 4
·1190-1201
·
IF 3.348
Yanling Feng,Wei Wu,Zhengyi Wang,Tianyu Zhao
An innovative phosphorus-silicone flame retardant (KAPP-OGPOSS) was prepared by grafting octa (propyl glycidyl ether) polyhedral oligomeric silsesquioxane (OGPOSS) on ammonium polyphosphate (APP) through silane coupling agent (KH-550). The chemical structure, morphology, flame retardancy, and mechanism of the obtained materials were comprehensively investigated. TG results demonstrated that EP with 15 wt% KAPP-OGPOSS produced a char residue of 42.6% at 700°C, which is three times that of pure EP. The flame retardant tests showed that the limiting oxygen index value of EP/15 wt% KAPP-OGPOSS was 30.6% (67.7% higher than that of neat EP) and its UL-94 grade reached to V-0 rating. Cone calorimeter testing indicated that the incorporation of 15 wt% KAPP-OGPOSS to EP significantly reduced heat, smoke, CO, and CO 2 release by 79%, 83%, 80%, and 82.5%, respectively. The modification of APP with OGPOSS was also beneficial for the improvement of the char yield and density of char. A flame retardant mechanism was revealed according to the investigation into the char residue. This modified approach provided an innovative yet practical means of enhancing the flame retardant properties of EP.
研究领域:
材料科学
·
高分子化学
·
消防安全工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 24
·52342
·
IF 3.057
Xu Han,Ying Guo,Huanhuan Cai,Xiang Li,Jiangnan Ding,Xiaojuan Zhao,Heng Zhou,Wantao Guo,Wei Huang,Tong Zhao
To improve the flame retardancy of vinyl epoxy (VE) resins more effectively, a half-cage and cage structure polyhedral oligomeric silsesquioxanes (P/N-POSS) containing phosphorus and nitrogen was synthesized by a one-step Kabachnik-Fields reaction from paraformaldehyde, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and 3-aminopropyltriethoxysilane. It was then blended with tetrabutyl titanate (TBT) in VE resins to construct a phosphorus-nitrogen-silicon-titanium synergy flame retardant system. P/N-POSS was well dispersed in the VE matrix at low loadings (≤4 wt%). With the addition of only 4 wt% P/N-POSS and 0.2 wt% TBT, the LOI value reached 29.2 and the UL-94 grade passed V-1 rating. Moreover, compared with VE-0, the peak heat release rate, total heat release, smoke production rate and total smoke production decreased significantly. The investigations on pyrolysis volatiles and char residue of cured VE composites revealed that the excellent flame retardancy of the VE composites were due to the superior free radical capturing ability, the dilution effect of P/N-POSS in the gas phase, and the promoting the carbonation effect of P/N-POSS, the catalyzing char formation ability of TBT in the condensed phase. Meanwhile, VE composites exhibited improved mechanical properties, thermal stabilities and retained the low viscosity and good processability of VE resins.
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
JOURNAL OF APPLIED POLYMER SCIENCE
·
2014
·Vol. 131
·期 16
·
IF 1.64
Xiu Qiang,Fang Chen,Xiao-Yan Ma,Xian-Bing Hou
Star-shaped polyhedral oligomeric silsesquioxane (POSS)–methacrylate hybrid copolymers with phenyl–triazole as terminal groups had been designed and synthesized via sequential atom transfer radical polymerization (ATRP), azidation, and phenylacetylene-terminated procedures, and the hybrid copolymers here could be denoted as POSS–(PXMA-Pytl) 8 , where X can be M, B, L, and S, represented four different methacrylate monomers, such as methacrylate (MMA), butyl methacrylate (BMA), lauryl methacrylate (LMA), and stearyl methacrylate (SMA), respectively. Thermal gravimetric analysis (TGA) and in situ Fourier transform infrared spectroscopy (FTIR) were applied for studying the thermal stability and degradation mechanism, and it was found that all of the POSS–(PXMA-Cl) 8 and POSS–(PXMA-Pytl) 8 copolymers exhibited excellent thermal stabilities, which had great potential in heat-resistant material application. Different tendencies of decomposition temperatures at 5% and 10% weight loss ( T 5 and T 10 ) dependent on the side-chain length and terminal group species were investigated respectively. The longer alkyl side chains of the monomers, the lower thermal stabilities, and enhanced T 5 and T 10 were also shown with the introduction of phenyl–triazole groups instead of chlorine groups. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40652.
研究领域:
聚合物化学
·
材料科学
·
热分析
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Wenbo Shen,Bin Du,Haitao Zhuo,Shaojun Chen
In this study, an Epoxy/POSS-liquid crystalline azobenzene-Poly (ethylene-co-vinyl acetate) (Epoxy/POSS-Azo-EVA) composite was prepared via the thermal curing of epoxy monomers and multi-functional thiol-containing Polyhedral oligomeric silsesquioxane (POSS) in an EVA matrix. The EVA matrix afforded the composite with shape memory performance. Epoxy/POSS polymer was uniformly dispersed in the matrix to act as a rigid skeleton, leading to the improvement of the mechanical properties and shape memory performance of the composite. Liquid crystalline azobenzene as the photosensitive component provided the inner stress to render the composite film with photo-induced shape-deformation behavior under UV light . The composite film not only exhibited thermal- and light-responsive programmable shape-memory behavior stimulated by heat and light, but also was recyclable and reprocessable. Moreover, the recycled composite film was processed into different functional devices. A flexible photomechanical device based on the recycled Epoxy/POSS-Azo-EVA composite film was fabricated, and the soft device deformed into a hook-shape under UV light and hooked an object whose weight is larger than that of the device. A smart wire was also prepared via assembling a stretched recycled Epoxy/POSS-Azo-EVA composite film and a copper foil by adhesive. The wire could control the status of a circuit via changing its shape under UV light and maintain the status after the removal of light. The functional devices described in this work only needed a short time of UV irradiation during a work cycle, and the devices still held the temporary shape in the absence of UV irradiation. The recyclable and reprocessable Epoxy/POSS-Azo-EVA composite film in this work could provide a creative approach for the fabrication of novel photomechanical devices and soft robotics with energy-saving, intelligence, recyclability , and sustainability.
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 PART B-ENGINEERING
·
2024
·
IF 12.7
Hailong Liu,Yifan Chen,Mingzhuo Chai,Yiqi Wu,Kangle Xue,Li Liu,Yudong Huang
Considering the development of CFRPs , addressing the challenge through the simplistic industrial operational methods to achieve high strength and toughness in carbon fiber-reinforced epoxy resin (EP) composites (CFRPs) is imperative. In this work, an innovative approach introduced to improve the strength and toughness of CFRPs by application of a nano emulsion encapsulated polyhedral oligomeric silsesquioxane (POSS) sizing agent (POE sizing agent). The employment of a POE sizing agent markedly enhanced the surface energy and roughness of carbon fibers (CF) as well as the interface properties of CFRPs. Furthermore, the 10-PCF (10 wt% POE sizing CF) reinforced EP unidirectional CFRPs demonstrated superior strength and toughness. Relative to the DCF (Desizing CF) reinforced EP unidirectional CFRPs, their interlaminar shear strength , flexural strength , and unnotched impact strength increased by 24.9 %, 37.8 %, and 45.6 %, respectively, reaching 99.8 ± 2.3 MPa, 1376.8 ± 21.6 MPa, and 94.9 ± 4.6 kJ/m 2 . Concurrently, the 10-PCF reinforced EP composite laminates exhibited outstanding impact resistance, minimal damage area, and enhanced compressive strength after impact. Additionally, the strength, bundling, and flexibility of the sized CF were maintained, ensuring the processability of CF. The utilization of POE sizing agent for strength and toughness improvement in CFRPs offers a straightforward and industrially feasible approach. This research opens up a novel strategy for high-performance CF and CFRPs preparation.
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
POLYMER
·
2025
·
IF 4.5
Gaoming Li,Yeping Wu,Guohua Hang,Xibing Shen,Zhongtao Chen,Mao Chen,Xiuli Zhao,Yinyu Zhang,Sixun Zheng
Epoxy thermosets have been widely used in engineering applications due to their excellent thermal stability and chemical resistance. However, their inherent brittleness causes low bonding strength. Therefore, improvement of toughness is required. By using a variety of modifiers, epoxy thermosets can be toughened via the generation of fine phase-separated morphologies. In this work, we reported the toughening of epoxy thermosets with polyhedral oligomeric silsesquioxane (POSS)-capped poly(ε-caprolactone)s (PCL) . By taking control of types of R groups ( i.e., isobutyl and/or isooctyl) of POSS cages and the lengths of PCL chains, the epoxy thermosets were regulated with the morphologies from nano-to macro-scales. It was found that the improvement of toughness was quite dependent on types of R groups of POSS cages. Under the identical condition, the thermosets contain isooctyl POSS-PCL n had the fracture toughened larger than those containing isobutyl POSS groups. For the thermoset containing 15 wt% of isooctyl POSS-PCL 1.00 , the critical stress intensity factor ( K IC ) was enhanced from 0.70 to 1.69 MPa m 1/2 at room temperature and from 1.11 to 2.51 MPa m 1/2 at low temperature and the thermal stability remained invariant. Furthermore, the bonding strength on stainless steel and anodized aluminum substrates were significantly improved with the incorporation of 15 wt% of isooctyl POSS-PCL 1.00 . These findings provide a novel approach to regulate phase structure in epoxy thermosets, offering the insights into structure-performance relationships, thus opening up a new way for designing epoxy resins with high toughness and adhesive strength.
研究领域:
高分子材料科学
·
复合材料工程
·
表面与界面化学
·
材料力学性能
·
胶体与界面科学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER BULLETIN
·
2024
·Vol. 81
·期 11
·10081-10118
·
IF 3.1
Alassod Abeer,Alkhateeb Weaam,Alghoraibi Ibrahim,Alassod Ghrood,Alassod Rasha
In this study, we successfully fabricated biocomposite monoliths using a facile, cost-effective, and friendly method via the thermally induced phase separation method using Polystyrene, Lignin, and OV-POSS. The properties of the prepared composites were estimated using Fourier transform infrared measurement (FTIR), scanning electron microscopy (SEM), and thermogravimetric analyzer (TGA). Furthermore, wettability properties were studied using water and oil. FTIR analysis indicates Polyester, Lignin, and OV-POSS were physically blended. The investigation by SEM showed the successful merging of components. Moreover, it revealed that OV-POSS nanoparticles acted as a support for reduced surface roughness. TGA measurements revealed that thermal stability was much better with increased OV-POSS loading. OV-POSS modified monolith exhibited hydrophobic with water contact angles of more than 130°. Results indicate that the produced monolith has a good sorption behavior to oils and organic liquids, whereas PL10L-0.3P showed higher sorption capacities followed by PL10L-0.1P, PL10L, and PL, respectively. The performance of the monoliths on oil/water separation was investigated through the selective removal of oil or organic solvent from water. Hence, the monoliths showed high separation efficiency above 90% and good reusability. The analysis showed that the adsorption for the oil and solvent process followed the pseudo-second-order model with a linear regression coefficient ( R 2 ) of > 0.999. The equilibrium data fit well with the Langmuir model. Besides, thermodynamic parameter analysis results showed that the adsorption was spontaneous and endothermic. An economic study examining the obtained resulted in a rate of investment (ROI) of 38.12%, a breakeven point (BEP) of 44.70%; this research is expected to be useful for the monolith industry that has attractive potential in practical industrial water treatment. Graphical abstract
研究领域:
材料科学
·
环境工程
·
纳米技术
·
高分子科学
·
化学工程
✓ 已验证
DOI
高影响因子
DESALINATION
·
2023
·
IF 9.9
Yongheng Yin,Yuemin Guang,Hongxiu Zhang,Qiying Xia,Chongbin Wang
The trade-off limit between permeability and selectivity , along with membrane fouling , has consistently posed significant challenges impeding the practical implementation of water purification membranes. In this paper, a combination of polyhedral oligomeric silsesquioxanes (POSS) and chitosan is introduced into the polyamide layer through interfacial polymerization and crosslinking to optimize the physical, chemical structure of membrane simultaneously. The resulting P/CS-2-POSS-2 membrane exhibits a notable water flux of 221.3 L m −2 h −1 MPa −1 and a substantial Na 2 SO 4 rejection of 97.1 %. The selectivity of water molecules over sulfates in the optimized hybrid membrane is approximately 4 times greater than that observed in the pristine polyamide membrane. This finding underscores the success of the developed method in mitigating the trade-off between permeability and selectivity. Furthermore, the hybrid membranes exhibit superior antifouling properties, as evidenced by an impressive flux recovery ratio of 95.8 % for bovine serum albumin. Additionally, the mass transport properties of the prepared membranes are explored via molecular dynamics (MD) simulations. The results highlight that chitosan primarily enhances the membrane's hydrophilicity , whereas POSS predominantly regulates the membrane's pore size. Both fillers synergistically enhance the comprehensive performance of the membrane by effectively utilizing steric hindrance and the Donnan effect .
研究领域:
材料科学
·
环境工程
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2017
·
IF 2.084
Yanli Ma,Ling He
Organic-inorganic hybrid is prepared by grafting nano-scaled methacrylisobutyl polyhedral oligomeric silsesquioxane (MA-POSS) onto glycidyl methacrylate (GMA) via the combining of free radical polymerization , epoxy opening reaction and atom transfer radical polymerization (ATRP) techniques. The obtained (MA-POSS)-pendanted epoxy hybrid, PGMA- g -P(MA-POSS), are discussed fot their highly thermo-mechnical property, hydrothermal resistance and permeability based on the self-assembled micelles . In THF solution, PGMA- g -P(MA-POSS) could self-assembly into 110–800 nm sphereric core-shell micelles , while, the pre-curing PGMA- g -P(MA-POSS) distributes 60–600 nm core-shell micelles because the developed three-dimensional network structure makes the PGMA chains twining and cross-linking tightly leading to the shrinkage of particles. These self-assembled micelles have provided the casted films with 0.19–14.4 nm surface roughness , significant water resistance (SCA = 113-123°), high thermal stability ( T d = 300–600 °C) and strong adhesive strength (216–333 N). Compared with the poor adhesive strength for commercial epoxy resin (E-51) decreased from 393 N to 28 N after 15 hydrothermal cycles, the obtained PGMA- g -P(MA-POSS) displays super thermal endurance properties and humidity resistance by keeping a relative constant adhesive strength (from 340 N to 337 N). Furthermore, PGMA- g -P(MA-POSS) also gives much better permeability to the protective treated sandstone than E-51. Therefore, PGMA- g -P(MA-POSS) is prospected to serve as coatings with great potential applications.
研究领域:
材料科学
·
高分子化学
·
纳米复合材料
·
表面工程
·
涂层技术
·
聚合物科学
·
功能材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）