INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2019
·
IF 3.375
Hao Yang,Ping He,Henglun Cheng,Baoqing Shentu
To promote the anti-aging performance of thermoplastic vulcanizates (TPVs) versus ultraviolet (UV)/O3 exposure, a nano-TiO2-loaded antioxidant (TiO2-KH570-MB) was prepared by a thiol–ene reaction between 2-mercaptobenzimidazole (MB) and modified nano-TiO2 (TiO2-KH570). Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and thermogravimetric analysis demonstrated the chemical linkage between MB and modified nano-TiO2, and the loading amount of MB was approximately 5.19 wt %. The contact angle test showed that the surface hydrophobicity of TiO2-KH570-MB was significantly increased due to the immobilization of MB. Scanning electron microscopy revealed that TiO2-KH570-MB was uniformly distributed in the TPV matrix. The anti-aging property of TPV compounds was tested in the device with high-intensity ultraviolet radiation and high-concentration ozone. The effects of UV/O3 comprehensive aging on the TPV compounds were evaluated by means of the variations of surface morphology, tensile test, hardness, gel content, and carbonyl index with aging time. On the basis of the aging behavior, we concluded that TPV/TiO2-KH570-MB exhibited excellent stability against UV/O3 aging, due to the homogeneous dispersion, low level of migration, and low volatility of TiO2-KH570-MB.
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MACROMOLECULAR MATERIALS AND ENGINEERING
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2017
·Vol. 303
·期 2
·1700407
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IF 2.863
Qing Li,Guangfu Liao,Jun Tian,Zushun Xu
Novel fluorinated copolyimide/amine-modified sepia eumelanin (ASE) nanocomposites are successfully fabricated via covalent bonds. To achieve this, the polyimide (PI) is synthesized by random co-polycondensation. The effects of ASE on the structure and properties of the PI are investigated. A multilinked network is formed with ASE acting junctions in the nanocomposites. The mechanical properties of the PI are significantly improved by the addition of ASE, and the optimal tensile strength and elongation at break are 79.7 MPa and 85.42%, respectively. UV–vis transmittance, methylene blue (MB) photodegradation, and recyclability measurements confirm that the PI/ASE nanocomposites are transparent to visible light at low ASE loadings and show outstanding UV-shielding properties and lifetimes under intense UV irradiation owing to the synergistic absorption of UV light by the PI matrix and ASE. Furthermore, the PI/ASE nanocomposites have enhanced thermal properties with initial degradation temperatures above 500 °C. These properties endow the nanocomposites with great potential for UV-shielding in the conditions with high temperature and intense ultraviolet light.
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Journal of Water Process Engineering
·
2024
·
IF 6.3
Suiqin Yang,Liang He,Shiquan Sun,Fei Yang,Changxuan Wu,Diqi Xiao,Jinting Wang,Yang Gao,Wei Zhang,Lean Zhou,Julong Sun,Zhengqian Liu,Yuhong Cui
The emergence of novel wastewater treatment technologies has intensified the need to systematically compare and evaluate their performance. Based on an environmentally relevant experimental design, this study represents the systematic comparison of two advanced oxidation processes (AOPs), sodium percarbonate (SPC)-based and peracetic acid (PAA)-based AOPs, for the degradation of organic pollutants in wastewater, as they have been proposed as potential alternatives to H 2 O 2 -based AOPs. The efficacy of UV-activated SPC (UV/SPC) and PAA (UV/PAA) processes was tested in ultrapure water and three actual water samples, using carbamazepine (CBZ) as a representative organic pollutant. In ultrapure water, the degradation rate of CBZ in the UV/SPC process is 1.4 times higher than in the UV/PAA process. UV/SPC is more effective in the presence of Cl − (5–25 mM) and fulvic acid (2–10 mg/L) than UV/PAA, while UV/PAA exhibits more excellent resistance to HCO 3 − (5–25 mM). In actual water samples, the CBZ degradation rates are close in these two processes, with UV/PAA slightly faster. Product analyses show similar transformation pathways for CBZ in two processes, probably because they both feature HO • as the dominant active species (contributing > 98 %). This study provides fundamental data for a comprehensive understanding of these two AOPs, which will be beneficial in guiding their further development.
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ACS Applied Materials & Interfaces
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2024
·
IF 8.3
Xiaolong Li,Jundi Wan,Yulu Tang,Chenyu Wang,Yahui Zhang,Dongjun Lv,Mingyuan Guo,Yongning Ma,Yuhao Yang
Navigating more effective methods to enhance the photon utilization of photodetectors poses a significant challenge. This study initially investigates the impact of morphological alterations in 2H-MoS2 on photodetector (PD) performance. The results reveal that compared to layered MoS2 (MoS2 NLs), MoS2 nanotubes (MoS2 NTs) impart a cavity enhancement effect through multiple light reflections. This structural feature significantly enhances the photodetection performance of the MoS2-based PDs. We further employ the heterojunction strategy to construct Y-TiOPc NPs:MoS2 NTs, utilizing Y-TiOPc NPs (Y-type titanylphthalocyanine) as the vis–NIR photosensitizer and MoS2 NTs as the photon absorption enhancer. This approach not only addresses the weak absorption of MoS2 NTs in the near-infrared region but also enhances carrier generation, separation, and transport efficiency. Additionally, the band bending phenomenon induced by trapped-electrons at the interface between ITO and the photoactive layer significantly enhances the hole tunneling injection capability from the external circuit. By leveraging the synergistic effects of the aforementioned strategies, the PD based on Y-TiOPc NPs:MoS2 NTs (Y:MT-PD) exhibits superior photodetection performance in the wavelength range of 365–940 nm compared to MoS2 NLs-based PD and MoS2 NTs-based PD. Particularly noteworthy are the peak values of key metrics for Y:MT-PD, such as EQE, R, and D* that are 4947.6%, 20588 mA/W, and 1.94 × 1012 Jones, respectively. The multiperiod time-resolved photocurrent response curves of Y:MT-PD also surpass those of the other two PDs, displaying rapid, stable, and reproducible responses across all wavelengths. This study provides valuable insights for the further development of photoactive materials with a high photon utilization efficiency.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Chongxiao Ge,Rui Hu,Jingyan Zhu,Jiajing Huang,Cancan Zhang,Yaqiong Zhang,Yuxian Xing,Bin Zhang,Feng Jiang
Developing sustainable elastomers derived from natural resources is crucial to mitigate environmental pollution yet challenging on account of their limited properties. In this work, chitin, lignin, and plant oil were selected as the feedstocks to design renewable bottlebrush copolymer elastomers via homogeneous reversible addition-fragmentation chain transfer (RAFT) polymerization. In such kind of bottlebrush copolymers, chitin serves as the rigid backbone, while the plant oil-derived monomer 4-vinylbenzyl oleate (VBO) and lignin-derived monomer syringaldehyde acrylate (SA) were chosen as the soft and hard segments for the rubbery brushes, respectively. These chitin- graft -poly(4-vinylbenzyl oleate- co -syringaldehyde acrylate) (Chitin- g -P(VBO- co -SA)) bottlebrush elastomers possess tunable mechanical properties and superior UV-shielding performance. To further improve their macroscopic behavior, carbon dots (CDs) were incorporated into the Chitin- g -P(VBO- co -SA) copolymers. The resulting Chitin- g -P(VBO- co -SA)/CD composites exhibit significantly enhanced tensile strength and excellent photothermal conversion ability owing to the introduction of CDs. This robust and convenient strategy can inspire the continuous development of strong and functional sustainable elastomers by combining different natural resources.
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JOURNAL OF CHROMATOGRAPHY A
·
2025
·
IF 4
Yanting Liu,Xiaochun Li,Hongjun Luo,Rui Huang,Xuewan Wu,Lei Tan,Jialiang Guo,Kaisong Yuan
We developed a three-dimensional (3D)-metal-printed ultraviolet (UV) detector with an aluminum alloy housing that allows it to withstand low-polarity organic solvents. The detector can be attached to the lower end of an open chromatography column to realize real-time monitoring of the separated and eluted colorless fractions. Open column chromatography is commonly used for the separation and purification of mixtures. However, open column chromatography is never coupled with UV detectors. In the context of open chromatography column experiments, thin-layer chromatography (TLC) is typically employed for the qualitative analysis of separated products. Nevertheless, this approach is both cumbersome and time-consuming. Therefore, to reduce workload and save time, we developed a 3D-metal-printed UV detector, which exhibits good stability and linearity (R 2 > 0.99). The feasibility of real-time monitoring using this 3D-metal-printed UV detector was verified by subjecting the mixture to separation and monitoring. On elution of a substance exhibiting light-absorbing properties, a decrease in voltage is observed. At this point, the collection of the fractions may be initiated to achieve the effect of substance tracking. The utilization of the 3D-metal-printed UV detector for real-time monitoring enables the elimination of the time previously spent on the collection of all fractions and the subsequent determination of whether the fractions contain the substance by TLC. It is also capable of determining the separation effect of the mixture based on the curve monitored in real time. Moreover, the device can modify the dimensions of the interface, thereby facilitating its utilization in conjunction with high-performance liquid chromatography (HPLC) for the real-time monitoring of the separation effect of the column. The device is characterized by low cost and small size.
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FIBERS AND POLYMERS
·
2016
·Vol. 17
·期 11
·1849-1857
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IF 1.022
Zhang Bin,Han Jian
The poly(vinyl acetate) (PVAc)/zinc oxide (ZnO) microcapsule and PVAc/titanium dioxide (TiO 2 ) microcapsule were synthesized via in-situ emulsion polymerization method. The PVAc/ZnO microcapsule and PVAc/TiO 2 microcapsule were characterized by fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis(TG), transmission electron microscopy (TEM), and UV-visible spectroscopy (UV-vis). Effect of PVAc/ZnO microcapsule and PVAc/TiO 2 microcapsule on properties of poly(lactic acid) (PLA) was evaluated by UV-vis, SEM and mechanical properties test. The results showed that the addition of PVAc/ZnO and PVAc/TiO 2 microcapsules as a UV-blocking additive could significantly enhance UV-blocking property of PLA/PVAc/ZnO microcapsule composites and PLA/PVAc/TiO 2 microcapsule composites compared with pure PLA, PLA/ZnO composites and PLA/TiO 2 composites. The mechanical properties of PLA/PVAc/ZnO microcapsule composites were better than those of PLA/ZnO composites due to good dispersability and compatibility of PVAc/ZnO microcapsule in PLA matrix. Also, the mechanical properties of PLA/PVAc/TiO 2 microcapsule composites were better than those of pure PLA and PLA/TiO 2 composites. This study demonstrates the great potentials of the intrinsically UV shield additive PVAc/ZnO and PVAc/TiO 2 microcapsules in the application of high performance matrix resin and composite material.
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PROGRESS IN ORGANIC COATINGS
·
2016
·
IF 2.632
Tao Liang,Hongqiang Li,Xiaojing Su,Xuejun Lai,Huiqin Wu,Chuang Wang,Yang Wang,Mengdi Zhuang,Xingrong Zeng
We report a facile approach to designing the robust organic-inorganic hybrid superhydrophilic coating films under UV radiation. It is based on the utilization of ene-terminated hydrophilic oligomer (ETHO) and hierarchically mesoporous silica nanoparticles (HMSNs). ETHO was firstly synthesized with dl -dithiothreitol and excess of poly(ethylene glycol) dimethacrylate at room temperature via thiol-ene reaction, and then by spraying the methanol solution containing ETHO, HMSNs , trimethylolpropane triacrylate as crosslinking agent, and Darocur 1173 as photoinitiator on substrate, the thiol-ene/HMSNs hybrid superhydrophilic coating films were fabricated under the exposure of UV light. The structure of ETHO was confirmed by FT-IR, 1 H NMR and 13 C NMR, its molecular weight was 7600 measured by GPC. The wetting behavior of the coating films was found to be largely determined by the mass ratio of HMSNs to ETHO. With the mass ratio at 0.75, the hybrid coating films could achieve superhydrophilic state within 0.24 s, and SEM revealed the existence of double micro-nano structure on the surface, which was significant for the improvement of superhydrophilicity. Importantly, the superhydrophilicity of the coating film could be steadily maintained under the conditions of acid solution, boiling water and abrasion. Additionally, the coating films also exhibited excellent adhesion, flexibility and impact strength.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2017
·
IF 2.714
Yang Zhang,Jiarui Han,Shuyi Wu,Zhiguo Qi,Jun Xu,Baohua Guo
Functional biodegradable poly(butylene succinate) (PBS) covalently linking different amounts of anti-UV moieties in the polymer chains were synthesized from succinic acid (SA), 1,4-butanediol (BDO) and 2-hydro-4-(2,3-epoxypropoxy) benzophenone (HEPBP) via a two-step esterification and melt polycondensation process. The 1 H NMR and UV–vis spectra confirm the chemical structure and that the UV absorbing groups were preserved during polycondensation. The crystallization process is enhanced while the melting temperature hardly changes. The introduction of HEPBP does not affect the thermal stability and the crystal structure of PBS. In the accelerated aging test, all the samples underwent photo degradation but the incorporation of HEPBP delayed the degradation process, which is verified by the results of molecular weight and surface morphology changes. Higher HEPBP content leads to lower degradation rate and better UV protection effect. Furthermore, better resistance property to solvent extraction is achieved in the functional PBS. Trace amount of HEPBP migrated from PBS matrix while most of the UV absorber was extracted out in UV absorber/PBS mixture. As a result, the covalently linking UV stabilizing structure HEPBP not only delays the photo degradation of PBS but also endows functional PBS with excellent resistance when exposed to solvent, which is important for PBS application in long term use.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2016
·Vol. 133
·期 41
·
IF 1.866
Wei Mao,Shouhai Li,Mei Li,Xuejuan Yang,Jian Song,Mei Wang,Jianling Xia,Kun Huang
A novel bio-based and flame-retardant UV-curable vinyl ester resin (VER) monomer named Diglycidyl ester of maleinized dipentene modified with dibutyphosphate and methacrylic anhydride (MDDMD) was synthesized from industrial dipentene via Diels-Alder reaction, glycidylation, epoxy ring-opening reaction, and esterification. Its chemical structures were characterized by Fourier transform infrared (FTIR) analysis and proton nuclear magnetic resonance ( 1 H-NMR). In order to improve its flexibility, we prepared a series of copolymers under UV light radiation by mixing it with certain proportions of poly(ethylene glycol) dimethacrylate-200 (PEGDMA-200) which contained flexible groups. Their tensile property, curing degrees (CD), hardness, limiting oxygen index (LOI), dynamic mechanical thermal properties, and thermostability were all investigated. The cured mixed resins have a relatively high tensile strength of 10.05 MPa and curing degrees up to 92.5%. Both hardness (range: 50 to 23 HD) and LOI (range: 22.8% to 24.4%) of cured resins are improved with the increase of MDDMD content. Dynamic mechanical analysis (DMA) shows that their glass transition temperatures rise with the increase of MDDMD content. Thermogravimetric analysis (TGA) shows that the thermal stability of cured resins is enhanced with the increase of PEGDMA-200 content, as the main thermal initial decomposition temperatures are all above 260 °C and char yield at 800 °C are above 18.10%. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 44084.
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Journal of Materials Chemistry C
·
2016
·Vol. 4
·期 13
·2506-2512
·
IF 5.066
X. Y. Liu,H. Guo,Y. Liu,S. Ye,M. Y. Peng,Q. Y. Zhang
The design of white-light luminescent materials with excellent thermal stability is still a challenge in the field of white-light emitting diode (W-LED) application. In this paper, a pair of novel Bi3+/Mn2+ ions co-doped into white-emitting borosilicate glasses were successfully prepared using a melt-quenching method. Their luminescence properties were evaluated using transmission spectra, photoluminescence excitation and emission spectra in the temperature range of 300–573 K, and lifetime decay curves. Upon excitation with a ultraviolet (UV) light, the co-doped glasses exhibit intense tunable emitting color between the blue and the orange-red region due to efficient energy transfer from Bi3+ to Mn2+, and a perfect white light emission is realized by appropriately adjusting the Mn2+ concentrations. Furthermore, the Bi3+ singly doped glass presents good thermal stability, showing about 72.3% of the observed room temperature (300 K) emission intensity at 423 K, while the thermal stability becomes lowered after Mn2+ ions are incorporated into the singly doped sample, attributed to serious thermal quenching from Mn2+. This work may help to better understand the interactions between Bi3+ and transition metal ions, and it might also be helpful in the future design of organic resin-free W-LEDs.
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CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Zhouzhou Feng,Jiajie Yu,Jinming Kong,Tianhe Wang
In this paper, a photocatalytic system for effectively degrading azo dyes is described. The nanostructured porous Al 2 O 3 layer on glass substrate (PAOG)/silver nanoparticles (AgNPs)–Hemin composites were synthesized via photochemical reduction of Ag, self-assembly of 11-mercaptoundecanoic acid (MUA) on AgNPs and subsequently linking Hemin to MUA via coordination bond. PAOG as a nanoporous template was chemically durable, highly porous and allowed chemicals conveniently immobilized on the glass surface. PAOG had a BET surface area of 151 m 2 /g which facilitated the immobilization of AgNPs. The composite was characterized by BET surface area measurements, scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), energy dispersive X-ray analysis (EDX), Fourier transform infrared (FTIR) spectrometer and X-ray photoelectron spectroscopy (XPS). The photoreaction degradation processes were examined by UV/vis spectroscopy. Methyl orange (MO) and Acid red 18 solutions were used to evaluate the photocatalytic performance of PAOG/AgNPs–Hemin composite under visible light and UV irradiation. Compared with PAOG/Hemin, the PAOG/AgNPs–Hemin composite had enhanced photocatalytic efficiency due to higher electron transfer efficiency from AgNPs to Hemin. This novel composite with enhanced broad spectrum photocatalytic properties has promising potentials in degradation of dyes by UV and visible light utilization.
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危险品化学品经营许可证（带存储）