PROGRESS IN ORGANIC COATINGS
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2022
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IF 6.206
Liangyuan Qi,Bangyu Wang,Weijie Zhang,Bin Yu,Mutian Zhou,Yuan Hu,Weiyi Xing
Polyester fabric is ubiquitously applied for clothing, furniture and transportation, whereas its flammability with severe dripping often causes secondary hazards. Herein, it is highly imperative to impart excellent flame retardant to polyester fabric. In this work, a coating for polyester fabrics was prepared through a continuous dipping and ultraviolet (UV) curing process, which exhibited high-efficiency flame-retardant, anti-dripping and washing resistance. Firstly, the surface of polyester fabric was pretreated with plasma for providing more grafting sites of polyester fabric. Then, the flame retardant 6-((((2-(acryloyloxy) ethoxy) (oxo)(phenyl)phosphonio) oxy) methyl) dibenzo[c,e][1,2]oxaphosphinine 6-oxide (DPEA) and Tri(acryloyloxyethyl) phosphate (TAEP) were successfully synthesized and applied to the coating by UV-curing. In vertical burn test, the damage length of polyester with DPEA and TAEP (PET-D 3 /T 4.5 ) was reduced from 300 mm of pristine PET to 100 mm with no dripping. In the Thermogravimetric Analysis (TGA) test, the char residue of PET-D 3 /T 4.5 in nitrogen increased to 26.7 % compared with 9.7 % of pristine polyester. More specifically, the Peak Heat Release Rate (PHRR) and Total Heat Rate (THR) of PET-D 3 /T 4.5 decreased 43.3 % and 22.2 % in the Micro-scale Combustion Calorimetry (MCC) test, which reflected excellent thermal stability and flame retardant properties. In addition, the Limiting Oxygen Index (LOI) of PET-D 3 /T 4.5 only dripped from 24 % to 23.5 % after ten standard laundering cycles, indicating prominent water resistance. Remarkably, Thermogravimetric Analysis-Fourier transform infrared (TG-IR), Scanning Electron Microscope (SEM) and X-ray Photoelectron Spectroscopy (XPS) have been performed for investigating the mechanism of flame retardant. Thus, a strategy with convenience and economics is proposed, which is of gargantuan significance to the improvement of coating durability through plasma surface treatment and UV-curing.
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高影响因子
ACS Applied Polymer Materials
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2022
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IF 4.855
Zhi Yang,Shuqiang Peng,Zian Wang,Jia-Tao Miao,Longhui Zheng,Lixin Wu,Zixiang Weng
Mold forming is among the most valuable methods of plastic processing and engineering due to its high accuracy and efficient throughput. However, complex processes are needed to prepare injection molds, resulting in extremely high initial investment costs. Stereolithography (SL), an emerging three-dimensional (3D) printing technique, shows promise in significantly reducing the cost of manufacturing molds while meeting requirements for mold accuracy. Nonetheless, the service life of printed molds is often limited by poor mechanical and thermal properties of compatible resins, preventing their widespread use in industrial applications. Although introducing inorganic fillers to the resin has been proved to be an effective enhancement method for the properties mentioned above, the drastically increased viscosity of the system makes it incapable of being well adapted for commercialized SL printers. Here, we overcome these challenges by introducing the vaporized metal combustion (VMC) method to prepare a high-solid-content (60 wt %) UV-epoxy/microsilica while retaining a low viscosity (1072 cps), which makes it suitable for SL 3D printing. By a laboratory-scaled SL 3D printer, as-prepared samples exhibit ultrahigh stiffness (Young’s modulus of 9.72 GPa) and thermal tolerance (heat deflection temperature reaches 188 °C). We further demonstrate that with a combination of materials and the mold design, the service life of the as-prepared injection and vacuum casting mold was greatly extended (about 10 times higher than other reports). This work surpasses limitations in the properties of 3D-printed parts, enabling direct printing molds via stereolithography for potential use in academic and industrial applications alike.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Mohsin Pasha,Saier Liu,Minjing Shang,Min Qiu,Yuanhai Su
Photochemical transformations are mobilized by traceless photons of narrow or broad visible light wavelength and have been proven as a green and sustainable synthesis route for organic compounds. However, most of such investigations were restricted to only parametric studies, lacking in examining a synergistic involvement of actinometric, kinetics and mass transfer mechanisms on product yield. To address this vital issue, we executed the synthesis of natural product juglone via the photooxidation of 1,5-dihydroxynapthalene (DHN) mediated through singlet oxygen, which was produced by triplet–triplet energy transfer from three porphyrin-based photosensitizers to triplet oxygen upon irradiation from UV–Vis LED. Compared to the other two photosensitizers, m-TcPP ( meso -tetracarboxyphenylporphyrine) showed a higher molar extinction coefficient and remarkable energy transfer, resulting in higher DHN conversion and juglone yield. Full DHN conversion and 82% yield were obtained at the m-TcPP loading of 2.0 mol% and the residence time of 22.1 min. Actinometric investigation showed that the photon flux was significantly improved by rising m-TcPP and DHN concentrations. The maximum radiant power absorbed by the DHN photooxidation could reach 17.3% of the total input power of UV–Vis LED strip. The detailed reaction mechanism of the DHN photooxygenation was discussed through the Jablonski diagram and rate constants of intermediate steps were determined. A positive relationship between the photon flux and the apparent rate constant was found by rising m-TcPP concentration from 0.01 to 0.05 mM, while the rise in DHN concentration from 5.0 to 10.0 mM resulted in a negative correlation between these parameters. Consequently, a synergistic improvement of photon flux and apparent rate constant was necessitated to attain complete DHN conversion and high juglone yield.
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2022
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IF 6.449
Weijun Yang,Yanlin Zhu,Yongbin He,Liqiang Xiao,Pengwu Xu,Debora Puglia,Piming Ma
Poly(lactic acid) (PLA) is an ideal biodegradable polymer material, widely applied in some disposable areas, such as packaging, biomedical and health care. However, its inherent brittleness, poor heat resistance and mono-functionality limit its application to a certain extent. In this study, PLLA-PCL-lignin nanocomposites (lignin nanoparticles (LNP) grafted with PLLA and poly(ε-caprolactone) (PCL) copolymer) produced by melt processing, were used as an interfacial compatibilizer. Meanwhile, partial replacement of PLLA by PDLA, in combination with an annealing treatment, were considered to enhance mechanical and heat-resistance of neat matrix. Mechanical thermal,optical properties, and heat resistance of the nanocomposites were comprehensively investigated. Interestingly, the notched impact strength was significantly increased from 2.3 (neat PLLA) to 15.3 and 12.1 kJ/m 2 for L8-C2 and LD8-C2 samples (PLLA, PDLA and PCL shorted as L, D and C, respectively), respectively. The lignin containing nanocomposite films also showed excellent UV-B resistance, due to the presence of LNP. Furthermore, a remarkable improvement of storage modulus up to 355 and 221 MPa at 90 °C was obtained for h-LD9-C1 and h-LD8-C2 (heat treatment shortened as h) via annealing treatment, enhancement ascribed to the transformation from homocrystallites to stereocomplex crystallites . As a consequence, a toughened PLA-PCL-lignin nanocomposite with good heat- and UV-resistance was successfully prepared, enlarging its possible use as multi-functional PLA based engineering plastic.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Lisha Zhai,Zhiyu Huang,Yuxin Luo,Huiyu Yang,Tonghe Xing,Annan He,Zhenwei Yu,Jie Liu,Xiaofang Zhang,Weilin Xu,Fengxiang Chen
Aramid fiber holds a great potential application in harsh environments like defense and aerospace due to outstanding integrated properties, but it still falls short in poor UV resistance and surface inertness. It is an intriguing but challenging task to obtain high anti-UV efficiency for aramid fiber without compromising the mechanical characteristics. Herein, a uniform and thickness-controlled amorphous TiO 2 coating is chemically-bonded onto aramid fiber surfaces via a modified atomic layer deposition (mALD) strategy. Although mALD TiO 2 has an amorphous structure, its special chemical bonding state similar to LBL enables it to absorb UV light to a certain extent, but at the same time endows it with low photocatalytic activity. In contrast to bare aramid fiber with poor UV resistance and greatly suppressed mechanical performance, the modified aramid fibers with 1000 ALD cycles possesses well-preserved mechanical strength and flexibility. Moreover, they exhibit 54.08% retention of initial tenacity even exposure to UV irradiation with intensity of 4260 W/m 2 at high temperature ( > 200 °C) for 360 min (equals to continuous exposure to strong sunlight irradiation for about 7.5 years), simultaneously retain the excellent laundering durability and lustrousness, demonstrating a significant enhancement in anti-UV efficiency. Such highly anti-UV fibers fabricated by a facile mALD strategy provide a new perspective on designing multifunctional fibers and devices for future innovative applications.
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高影响因子
Journal of Environmental Chemical Engineering
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2022
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IF 7.968
Zhicheng Lang,Xiangru Song,Ge Song,Lujie Han,Qizhan Zhang,Minghua Zhou
This study validated the feasibility of the simultaneous removal of antibiotics such as sulfamethazine and other pollutants including ammonia nitrogen, nitrate nitrogen and phosphorus, as well as disinfection in marine aquaculture wastewater by using a flow-through ultraviolet/electro-chlorine (EO+UV) process, comparing the removal performance and energy consumption with that by separate EO and UV process. Due to the co-action of multiple radicals and free chlorine, the removal of sulfamethazine and ammonia nitrogen by using EO+UV process was much higher than that by using EO and UV. This process could achieve complete inactivation of bacteria and removal of sulfamethazine under optimal conditions of 10 mA (1.4 mA/cm 2 ), flow rate 15 mL/min and pH 8.0. It also exhibited an effective removal of other antibiotics (norfloxacin, chloramphenicol and cephalexin). During treatment, 5.0–87.0 mg/L free chlorine was generated by EO process at current of 10–50 mA (1.4–7.1 mA/cm 2 ), and it was further converted into a variety of radicals under UV irradiation such as hydroxyl (4.95–9.45 μmol/L) and chlorine radical, which greatly improved the performance and reduced the energy consumption to only 19.0 kWh/kg, far lower than other processes. This flow-through EO+UV process had great practical application prospects for the comprehensive removal of multiple pollutants especially antibiotics and sterilization from marine aquaculture wastewater.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
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IF 4.539
Chongling Wang,Na Li,Pengfei Bian,Guohua Li,Jingyue Yang,Qing Li,Tifeng Jiao
Molecular self-assembly is a technology in which different structural components spontaneously form assemblies with special functions through weak, reversible non-covalent interactions on the basis of molecular recognition . The amphiphilic and biocompatibility of polypeptides make it has natural advantage in self-assembly at the air-water interface. In this work, the self-assembled films of palmitoyl pentapeptide-4 (PP4) and dye molecules were prepared by Langmuir-Blodgett (LB) technology. It was found that the PP4/dye composite film had good acid-alkali gas response. In addition, the LB film prepared by PP4 and methyl orange (MO) showed chiral signal, which was reflected in the circular dichroism spectrum. The current research work provides new clues for the preparation of functional self-assembled films and their applications as gas sensors and chemical switches.
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高影响因子
FOOD CHEMISTRY
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2021
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IF 7.514
Liye Wang,Jiangxiu Niu,Pengyuan Wei,Yilei Feng,Mingyue Ding,Chaojun He,Yongjie Ma,Yaolei Zhu,Jia Li,Lingli Huang,Xiya Zhang
To reduce matrix interference and realize simultaneous detection of multiple homologous compounds (trimethoprim (TMP), diaveridine (DVD), ormetoprim (OMP), baquiloprim (BQP), and aditoprim (ADP) in pig, cattle, chicken, and fish muscles), an immunomagnetic bead (IMB)-based sample purification pretreatment with HPLC–UV was developed. A broad-spectrum monoclonal antibody (mAb, named 14C6) was prepared and conjugated with carboxylic-acid-functionalized magnetic nanoparticles using the active ester method to obtain IMBs for sample purification. The extraction solvent was optimized based on the extraction efficiency. Good linearity was observed for all the five analytes (10–200 μg/kg) with the LOD and LOQ of 5 and 10 μg/kg, respectively. The mean recoveries ranged from 62.5% to 76.9%, while the coefficient of variation was <12.2%. The IMB method afforded greater sample purification and enrichment than those achieved with the SPE column-based conventional method. Hence, the IMB-based sample purification is a useful tool to determine 2,4-diaminopyrimidine residues in edible animal tissues.
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PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
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2021
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IF 5.161
Kaiyun Wu,Taijiang Gui,Jiahao Dong,Jing Luo,Ren Liu
A novel kind of robust PANI microcapsules were prepared via a one-pot photopolymerization and interfacial aniline polymerization. In our strategy, lignosulfonate was employed as emulsifier to stabilize oil-in-water emulsion, in which the oil phase was composed of self-healing agent (tung oil), photo-crosslinkable acrylic monomer and crosslinker. Under UV light, the acrylic monomer and crosslinker were photo-polymerized and formed a cross-linked polyacrylic shell, endowing sufficient robustness to the microcapsules. Aniline was subsequently added to the water phase and polymerized at the oil-water interface, which converted to a second shell and endowed anticorrosion property. FTIR, TGA and SEM tests proved the successful preparation of PANI microcapsules, and the loading of tung oil in the microcapsules reached 55.1 wt%. These microcapsules could keep integrity and be uniformly dispersed in water-based epoxy coating. The incorporation of PANI microcapsules in the coating not only imparted self-healing properties to the coatings, but also greatly enhanced its anticorrosion performance. The scratch test indicated that the coatings containing only 5 wt% microcapsules could autonomously heal a scratch with 50 μm in width. In addition, the healed coatings with the microcapsules showed almost no corrosion products after 500 h salt spray test (SST), while for the scratched neat epoxy coating, a large area of coating peeled from the substrate after only 200 h SST. The remarkably enhanced corrosion protection capability was owing to the closure of the scratch by the self-healing effect and the inhibition efficiency of PANI.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Jiayu Du,Decai Liu,Zhiyong Zhang,Huiying Ai,Ming-Lai Fu,Wenjie Sun,Baoling Yuan
The widespread use of chlorine during disinfection has led to the problems of disinfection by-products (DBPs). Recently, the combination of ultraviolet (UV, 254 nm) and vacuum ultraviolet (VUV, 185 nm) with chlorine has been considered a promising strategy to mitigate the formation of DBPs. This study systematically evaluated the efficacy of six different disinfection methods in abating humic acid (HA), a common precursor of DBPs (UV-Chlorine, VUV/UV-Chlorine, Chlorine-UV, Chlorine-VUV/UV, UV/Chlorine, and VUV/UV/Chlorine). Under 40 mJ/cm 2 UV fluence and 3 mg/L chlorine dose, the synergistic processes yielded DBP levels below 20 μg/L, whereas sequential disinfection resulted in DBP levels exceeding 100 μg/L. Additionally, there was no significant difference in the formation of DBPs between the two methods of chlorination followed by irradiation. However, for irradiation followed by chlorination, the addition of VUV led to an increase of 50 μg/L in trihalomethanes (THMs). As the irradiation time increased, the inclusion of VUV demonstrated enhanced control of DBP levels in the sequential disinfection process. Moreover, compared to UV/Chlorine, at 13 mg/L chlorine dose in VUV/UV/Chlorine process, the inclusion of VUV expedited the appearance of peak DBPs by two minutes and reduced the peak value by 25.6 %, but the DBP yield was 12.9 times higher than that at a chlorine dose of 3 mg/L. This study, comparing six combination disinfection methods, will provide deeper insights into precursor abatement and DBP control during drinking water disinfection.
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高影响因子
MATERIALS RESEARCH BULLETIN
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2023
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IF 5.4
Meixian Li,Jun Liu,Tao Zhang,Nina Liang,Lijuan Yan,Fengzhen Lv,Wenjie Kong,Fuchi Liu,Lizhen Long
The construction of semiconductor heterojunctions is an effective approach to enhance the performance of optoelectronic devices. In this study, graphene-quantum-dots (GQDs) were grown on ZnO nanorods arrays in - situ to form intimate heterojunctions. The fabricated photoelectrochemical (PEC) photodetector based on ZnO/GQDs heterojunctions displayed good self-powering characteristics, with an on/off current ratio of approximately 21 at zero bias, which was almost seven-fold higher than that of the bare ZnO device. The responsivity and detectivity of the ZnO/GQDs-based photodetector were also enhanced compared with those of bare ZnO devices. A unique type-II band alignment was established at the ZnO/GQDs heterojunction interface, which facilitated the carrier transfer. Moreover, the ZnO/GQDs heterojunction reduced the passivation of the surface states, resulting in large energy-band bending and an internal electric field at the semiconductor/electrolyte interface, which provided a powerful driving force for the separation and transport of photogenerated carriers. These combined effects enhance the performance of the photodetector, indicating that this approach can be used to fabricate high-performance PEC optoelectronic devices.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Ning Zhang,Yujie Xu,Rongjin Shi,Man Zhou,Yuanyuan Yu,Ping Wang,Qiang Wang
With the improvement of the hygiene awareness and pathogen prevention awareness of patients and medical staff, textiles with efficient and long-lasting pathogen inactivation effects are urgently needed. Photodynamic therapy (PDT) has rapidly developed into a new type of antibacterial technology due to its high antibacterial activity and has received widespread attention. However, the commonly used photosensitizers are mostly inorganic nanomaterials, which have poor adhesion to textiles and are not environmentally or human friendly. Here, we report a strategy of preparation of a sunlight-driven rechargeable antibacterial textiles based on natural antibacterial agents, which can work in light and dark conditions. The prepared BD-PTL@wool has long-lasting antibacterial properties, can rapidly produce ROS, and can store sterilization activity under light irradiation, ensuring all-day bacterial killing (>99.95 % under light irradiation and >99.80 % under dark conditions after light irradiation). BD-PTL@wool has excellent reusability, and the antibacterial rate can still above 95 % after repeated use for 5 times. In addition, BD-PTL@wool has excellent hydrophilic, UV resistance, biocompatibility and can withstand 50 washing cycles. The successful application of this strategy in textile preparation broadens the research idea for exploring the application of green photosensitive antibacterial materials in textile field.
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PubMed
高影响因子
危险品化学品经营许可证（带存储）