POLYMER BULLETIN
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2014
·Vol. 71
·期 11
·2923-2944
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IF 1.491
Yan Huiqiong,Chen Xiuqiong,Wu Tiantian,Feng Yuhong,Wang Chunxiu,Li Jiacheng,Lin Qiang
The surface modification with poly(methyl hydrosiloxane) (PMHS) using a grinding method as a pesticide carrier had been successfully achieved. The characteristics of the modified kaolin were represented by Fourier transform infrared, X-Ray diffraction, BET specific surface area measurements, laser particle size analysis, transmission electron microscopy and contact angle measurement. Subsequently, immobilization of acetamiprid onto clay’s surface was carried out by means of freeze-drying technology. And the drug-loaded clays were encapsulated in alginate-chitosan composite beads by extrusion into calcium chloride solution. The composite beads showed regularly spherical shapes and uniform sizes with diameters of 1.44 ± 0.24–1.75 ± 0.19 mm. The immobilization and release of acetamiprid were carried out to examine the effect of the modified kaolin on the properties of the composite bead. The results showed that the intensive force of superfine pulverization during the grinding process was effective to increase the specific surface areas of the modified kaolin with particle size reduction. The modified kaolins as promising carrier materials had improved the drug loading rate and encapsulation efficiency from 4.15 and 42.01 % for alginate-chitosan composite beads to 6.02 and 82.95 %, which were higher than 4.33 and 54.29 % for SA-CS-kaolin composite beads, respectively. The controlled-release formulation containing the modified kaolin had shown slow and sustained release properties to promote the efficient use of organic pesticide to reduce pollution effect on the environment.
研究领域:
材料科学
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农业化学
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药物递送系统
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环境友好材料
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粘土矿物加工
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 16
·47025-47037
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IF 5.8
Wang Tianyu,Yang Lang,Rao Feng,Jiang Kaixi,Byrynnai Choduraa
Adding organics in the process of geopolymer synthesis can combine the functional groups of organics with the three-dimensional structure of geopolymer, thus changing the properties of geopolymer such as compressive strength, flexural strength, and acid resistance. In this work, excellent mechanical properties and acid resistance of metakaolin-blast furnance slag (Mk-BFS)-based geopolymer were synthesized by the incorporation of chitosan. The formation of sodium-alumino-silicate-hydrate (N-A-S–H) gel and calium-alumino-silicate-hydrate (C-A-S–H) gel in geopolymerization were characterized by 29 Si nuclear magnetic resonance (NMR). At 5% of chitosan, the compressive strength of Mk-BFS-based geopolymer could reach to 33.7 MPa. The results could be ascribed to that chitosan reacts with geopolymer to generate new C-O-Si structure meanwhile adhesion produced by the combination of positively charged cations and negatively charged ions makes the structure of geopolymer denser. After 7 days of sulfuric acid immersion, the reduction of compressive strength is less than 3 MPa, demonstrating its great acid resistance. The acid resistance of Mk-BFS-based geopolymer could attribute to that the free amino groups in chitosan preferentially react with acid solution and weakened the erosion of sulfuric acid. This study optimizes the compressive strength and acid resistance of geopolymer by adding appropriate amount of chitosan.
研究领域:
材料科学
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硅酸盐化学
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无机非金属材料
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功能复合材料
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建筑材料
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DOI
高影响因子
Corrosion Communications
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2026
·
IF 10.7
Hui Qian,Wenjie Zhao,Lichun Ren,Xin Zhang,Fang Wu,Yinghao Wu
One-dimensional (1D) carbon fiber (CF) and two-dimensional (2D) MXene, with high strength and physical barrier properties separately, are expected to simultaneously realize a synergistic reinforcing effect as strengthening fillers in epoxy resin to protect steel structures. However, synergistic reinforcement is significantly limited by the chemical compatibility and dispersing state of fillers in resin due to the chemical inertness of CF and self-stacking properties of MXene. Inspired by the chemical structure of mussel’s foot filaments, Fe 3+ -tannic acid (Fe 3+ -TA) metal-phenolic networks (MPNs) were constructed on the surface of fillers. Herein, the 1D/2D CF/MXene synergistically reinforced coating was designed with enhanced performance by simultaneously incorporating TA/Fe 3+ @CF (TCF) and TA/Fe 3+ @MXene (TMX) into the epoxy matrix. In the coating, 1D TCF could resist impact, and 2D TMX could provide barrier properties. Erosion test results indicate the T(CF+MX)/EP showed a reduction in volume loss by 13.34% and 13.28%, as well as mass loss by 2.11% and 11.59%, respectively, compared to TCF/EP and TMX/EP. The | Z | 0.01Hz of T(CF+MX)/EP stayed at 1.15 × 10 9 Ω cm 2 even following 25 d of immersion under 60 MPa alternating hydrostatic pressure (higher than that of TCF/EP and TMX/EP). This study could provide insights for multiscale fillers design to utilize synergistic reinforcement with enhanced protective performance of coatings.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yukun Liu,Zekun Wang,Yangai Liu,Ke Su,Chenguang Yang,Cian Xie,Mingxing Chen,Ruiyu Mi,Hao Ding,Yuanyuan Zhang,Lefu Mei
Perovskite quantum dots (PQDs) suffer from poor environmental and process compatibility, limiting device translation. We report a chelation-guided, in-situ nanoconfinement strategy that crystallizes CsPbBr 3 inside the lumen of halloysite nanotubes (HNTs), forming a CsPbBr 3 @HNTs composite with inorganic barriers and spatial isolation. The EDTA-2Na assisted route selectively coordinates Pb 2+ on the inner surface, steering nucleation and growth within HNTs channels. The composite shows bright green emission (λ em ≈ 524 nm) with a solid-powder PLQY of 61.66%, retains >95% PL after 60 days in air, and sustains ~40% after 90 min in water, far exceeding unprotected PQDs. It withstands process heat (44.6% PL at 80 °C) and is compatible with i-line UV photolithography, enabling uniform micro-patterns down to 3.45 μm. In situ high-pressure spectroscopy reveals reversible blue-shift and pressure-induced amorphization above ~2.4 GPa with emission recovery upon decompression. When integrated into white-LED backlights, the composite achieves NTSC 126.7% / Rec.2020 94.6% gamut coverage. This chelation-guided, in-situ nanoconfinement strategy thus delivers a stable and lithography-compatible perovskite quantum dot composite, establishing a process-ready platform for applications such as microLED color conversion layers and on-chip photonic circuits.
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高影响因子
FUEL
·
2026
·
IF 7.8
Yujie Hou,Zongqing Bai,Zhenxing Guo,Lingxue Kong,Jin Bai,Wen Li
The catalytic upgrading of coal pyrolysis volatiles represents a crucial route for the value-added utilization of low-rank coal. This study addresses the role of kaolin support modification in controlling the performance of NiO-based catalysts for this process. A series of NiO catalysts were synthesized via precipitation-deposition on kaolin supports subjected to different pre-treatments: calcination (MK800, CK1100), acid-modification (AMK800), and alkali-modification (ACK1100). Comprehensive characterization established a clear structure–activity relationship. The strong metal-support interaction in NiO/Kaolin catalysts facilitated high NiO dispersion, enhanced redox activity, and increased accessible sites density. Beyond the redox activity of NiO, modification strategies also critically influenced the textural and acidic properties. While NiO infilled micropores in the pre-etched AMK800 and ACK1100 with high specific surface area to form mesoporous networks, it induced leaching and pore generation in the solely calcined supports. Catalytic tests in upgrading Hami coal pyrolysis volatiles revealed superior performance of the NiO/Kaolin systems over bare supports, arising from a synergy between NiO redox sites and surface acidity. This synergy promoted oxidative cracking and deoxygenation, elevating the light tar fraction to 63.7–71.9 wt% (from 42.9 wt%) and reducing the tar O/C ratio by 16.3%–53.4% compared to non-catalytic pyrolysis. The 10NiO/AMK catalyst delivered optimal tar lightening and BTEX yield (increasing from 4.6 mg/g to 12.8 mg/g), whereas 10NiO/ACK achieved the highest deoxygenation efficiency and aromatic selectivity. This work clarifies how targeted kaolin modification dictates catalyst architecture and function, providing a foundation for designing efficient, clay-based catalysts for industrial tar upgrading.
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POLYMER DEGRADATION AND STABILITY
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2026
·
IF 8.1
Jingyao Xu,Wanting Song,Sujie Hu,Laibin Zhang,Shuilai Qiu
The pervasive risk of thermal runaway propagation in lithium–ion battery energy storage stations necessitates advanced thermal barrier materials. To address this, we developed a biomimetic silicone matrix composite inspired by volcanic rock strata. This material integrates a zinc borate/black phosphorus flame–retardant system, a silica aerogel insulation network, and an aramid fiber reinforcement. Upon high–temperature exposure, the composite spontaneously forms a dense, coherent boron phosphate (BPO 4 ) ceramic layer, akin to volcanic rock, which provides exceptional thermal shielding. Experimental results demonstrate outstanding performance: the composite maintains mechanical stability from –40 to 300 °C, reduces surface temperature rise by 75% compared to pure silicone foam, and lowers the peak heat release rate and total smoke production by 52.5% and 47.9%, respectively. In simulated thermal runaway tests, it completely prevented propagation to adjacent cells and reduced mass loss by 66.1%. Mechanistic studies reveal that the performance stems from a synergistic gas–phase and condensed–phase flame–retardant action, coupled with enhanced insulation and interfacial reinforcement. This work presents a promising material solution for enhancing the intrinsic safety of Energy storage power stations.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.7
Yukun Liu,Zekun Wang,Yuanyuan Zhang,Chenguang Yang,Tonglu Sun,Cian Xie,Hao Ding,Lefu Mei,Yangai Liu,Yue Wang
The commercialization of cesium lead halide perovskite quantum dots (QDs) is hindered by lead toxicity and poor stability. We propose a synergistic “chemical-physical” dual-confinement strategy. Chemically, Sn 2 + and Cu 2+ are co-doped into CsPbBr 3 , forming low-lead CsSn 0.7 Cu 0.1 Pb 0.2 Br 3 QDs, where Sn 2+ tunes the bandgap and Cu 2+ passivates Sn-related defects. Physically, QDs are in-situ grown within halloysite nanotubes (HNTs), a natural clay, serving as a nanoreactor and barrier. Silane modification enhances hydrophobicity. The composite exhibits high photoluminescence quantum yield (73.46%), excellent thermal reversibility, and remarkable water resistance (86% intensity retention after 12 h). Applications include a wide-color-gamut white light-emitting diode (122.1% of National Television System Committee (NTSC)) and an efficient visible-light photocatalyst for methylene blue degradation. This work provides a sustainable pathway for stable, low-toxicity perovskite materials in optoelectronics and environmental remediation.
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高影响因子
POLYMER DEGRADATION AND STABILITY
·
2026
·
IF 8.1
Kai Yan,Jingyao Xu,Shuilai Qiu
Sodium-ion batteries are prone to thermal runaway due to metal dendrite growth and structural stability defects, posing safety hazards. This study proposes a multi-component synergistic flame retardant and ceramization strategy, preparing a PDMS-based foam composite by introducing multi-component synergistic fillers. The material exhibits excellent comprehensive properties: after continuous burning at 1100°C for 60 minutes, the backside temperature only rises to 200°C, forming a dense ceramic layer that effectively blocks heat and oxygen transfer. The material exhibits low thermal conductivity, thereby demonstrating superior thermal insulation performance. The compression modulus is 25 kPa, and it can withstand 1000 cycles of 60% strain compression without significant stress decay, highlighting its excellent mechanical flexibility. Cone calorimetry tests show that its peak heat release rate (PHRR) is reduced by 41% compared to pure PDMS, total heat release (THR) is decreased by 27.7%, and total smoke production (TSP) is reduced by 66.9%, indicating excellent flame retardant and fireproof performance. Microscopic analysis reveals that multi-component fillers synergistically react at high temperatures to form a triple protection mechanism of "glass phase-crystalline phase-porous structure". This material provides a new solution for thermal runaway protection of sodium-ion batteries and has broad application prospects in energy storage power stations, new energy vehicles, and other fields.
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高影响因子
CERAMICS INTERNATIONAL
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2026
·
IF 6
Wei Xu,Mingfeng Zhong,Shaomin Lin,Yaling Yu,Zhijie Zhang,Chenyang Zhang
Dielectric glass-ceramics with high breakdown strength are critical for high energy density capacitors and pulsed power systems. However, in phosphate systems, the conventional trade-off between high crystallinity (to achieve high dielectric constant) and fine grain size (to achieve high breakdown strength) limits performance optimization. This study develops a rapid quenching-short duration heat treatment strategy for fabricating Ca 9 Al(PO 4 ) 7 (CAP) glass-ceramics with a distinctive nano-micro hierarchical architecture. By controlling the competitive growth of inherited crystals in the quenched melt and secondary crystallization of the glass matrix, a hierarchical structure spanning from 60 nm to 3.8 μm (span ratio R ≈ 63) was achieved. The optimally heat-treated glass-ceramic (1050 °C/3 h) exhibits an exceptional DC breakdown strength of 131.1 kV/mm, representing a 19% improvement over the control sample and a 28% enhancement compared to the 950 °C-treated specimen. This strengthening can be attributed to the following synergistic effects: (i) reduced porosity (<3.5%), (ii) increased CAP crystallinity (71.5 wt%) with elimination of anorthite impurities, and (iii) significantly elevated grain boundary activation energy (E a,gb ) from 1.27 eV to 1.39 eV. The enhanced E a,gb increases the barrier for long-range charge migration, effectively delaying breakdown propagation. The resulting glass-ceramic also demonstrates excellent dielectric stability (ε r ≈ 9.1, tan δ < 0.004 at 1 kHz and room temperature, with losses remaining below 0.012 up to 200 °C) across broad frequency (100 Hz–10 MHz) and temperature (20–200 °C) ranges, substantially broadening the material's application scenarios.
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高影响因子
HYDROGEOLOGY JOURNAL
·
2026
·
IF 2.3
Wang Huan,Zhang Zhenfei,Liang Haozhi,Liu Yongyi,Du Xinqiang
Clogging of porous media during artificial recharge is a technical bottleneck that limits the application of this technology. Sand column experiments were used to simulate the clogging of porous media to explore the effect of Cu(II) alone and in combination with suspended solids on hydraulic conductivity ( K ). The results indicate that at the end of experiments, the normalized hydraulic conductivity ( K ’) in experimental groups with Cu(II) concentrations of 1, 3, and 5 mg/L decreased to 0.634, 0.323, and 0.242, respectively. The degree of clogging increases with increasing Cu(II) concentration. At the end of recharge, the K ’ of the porous media in the 1 mg/L Cu(II), 100 NTU kaolin, and 100 NTU kaolin + 1 mg/L Cu(II) experimental groups decreased to 0.634, 0.233, and 0.016, respectively. The presence of Cu(II) and kaolin can individually cause clogging of porous media, but when Cu(II) coexists with kaolin, the degree of clogging significantly intensifies. The impact of Cu(II) and kaolin on porous media is not simply additive, but synergistic. The presence of Cu(II) changes the surface charge of suspended solids, increases particle size, and enhances migration, thereby significantly exacerbating clogging. This study systematically elucidates the clogging mechanism of suspended solids under the influence of Cu(II), thus providing a scientific basis for the design and management of artificial recharge systems.
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高影响因子
CARBOHYDRATE POLYMERS
·
2026
·
IF 12.5
Shijia Gu,Guohua Dong,Xiaoxiao Tan,Xinjia Zhang,Tianyuan Xiao,Chao Wang,Yushu Wang,Wenzhi Zhang
The development of coated slow-release fertilizers (SRF) utilizing low-cost and abundantly available biomass materials is still a significant challenge in sustainable agricultural production. Herein, based on the citric acid and phytic acid co-esterified natural starch (NS) derivatives (CAPAS) and cellulose acetate (CAc), a novel full biomass-based coated urea (CAPAS-CAc@urea) SRF was developed by utilizing multiple impregnation coating technology. The experimental results demonstrate that the synthesized CAPAS possesses higher hydrophobicity, film-forming ability, and a well-developed cross-linked network structure, ultimately leading to enhanced mechanical properties, hydrophobicity, and biodegradability of the CAPAS-CAc film. Importantly, the resulting CAPAS-CAc@urea SRF shows superior nutrient slow-release properties, endowing a cumulative N slow-release rate ∼ 77.5% (48 h) in water and ∼ 58.9% (29 d) in soil, which is approximately five times slower than that of uncoated urea. Kinetic fitting indicates that the N release of the prepared CAPAS-CAc@urea complies with the First-order kinetics model, which is governed by a Fickian diffusion mechanism. The results of the sugar sorghum pot experiment verify that CAPAS-CAc@urea exhibits the prominent function for promoting plant growth, primarily through improving root development. Consequently, this study provides a novel route for advancement of environmentally-friendly coated SRF with degradable biomass materials in the sustainable agriculture.
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DOI
PubMed
高影响因子
DYES AND PIGMENTS
·
2026
·
IF 4.2
Qin Huang,Jiawei Tian,Xinyu Xie,Wenyuan Zhang,Xiaoyan Liu,Haixia Zhang
Photodegradation, particularly induced by ultraviolet radiation, is a major cause of discoloration in organic pigments, though studies on their UV aging behavior remain limited. This work investigated the effects of binder type, environmental humidity, temperature, and plaster composition on the UVA aging behavior of three representative red organic aluminum lake pigments (safflower red lake, lac lake, and alizarin lake) using colorimetry, ATR-FTIR spectroscopy, mass spectrometry (MS), and analysis of variance (ANOVA). The results demonstrated that binder type and concentration, humidity, temperature, and plaster layer composition all significantly influenced the discoloration rate of pigments under UVA-induced. High temperature, high humidity, and alkaline plaster layers accelerated UVA degradation of pigments, whereas linseed oil formed a protective film that mitigated degradation of pigments. MS analysis confirmed that external factors did not alter the characteristic pigment markers, which ensured reliable identification of these lake pigments in cultural relics. These findings provide theoretical support and practical guidance for the conservation and identification of organic aluminum lake pigments in cultural heritage, highlighting their considerable practical significance.
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高影响因子
危险品化学品经营许可证（带存储）