COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2019
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IF 3.131
Maiping Yang,Weiqu Liu,Chi Jiang,Yankun Xie,Hongyi Shi,Fengyuan Zhang,Zhengfang Wang
Multifunction of cotton textiles with superhydrophobicity, UV protection, self-cleaning and oil-water separation is of interest for diverse practical applications. Herein, we report a simple and cost-effective dip-coating route to prepare superhydrophobic cotton textiles by using ZnO sol and 3-Mercaptopyl trimethoxysilane (MTS), and then introducing dodecafluoroheptyl methacrylate (DFMA) via thiol-ene click reaction. The coated cotton textile displayed excellent superhydrophobic ability with a water contact angle of 156.3° and a shedding angle of 6° when the concentration of DFMA was 10%. The chemical stability of the obtained sample was further evaluated by immersion in acid and alkaline solutions, salt solution and organic solvents , exhibiting wonderful chemical resistance of coating. Laundering and abrasion tests revealed the excellent mechanical stability of coating. Moreover, the modified cotton textile had good UV stability and shielding properties. Furthermore, this cotton showed outstanding self-cleaning and oil-water separation properties, which is promising and suitable for large-scale industrial applications.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2018
·Vol. 136
·期 14
·47310
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IF 1.901
Xiaoyong Zhang,Jinmei He,Lipei Yue,Yongping Bai,Huihui Liu
The development of adhesive tapes that can be applied at high temperature is a major challenge for pressure-sensitive adhesives (PSAs). To date, the heat resistance of PSAs has not been investigated in sufficient details. In this study, based on the relationship between curing structures and properties, a series of acrylic PSAs with excellent heat resistance were prepared. Commercial zirconium acetylacetonate (ZrACA), desmodur L75 (L75), and N , N , N ′, N ′-tetrakis(2,3-epoxypropyl)- m -xylene-α,α′-diamine (GA240) were employed as heat-curing agents. Trimethylolpropane triacrylate (TMPTA) was used as ultraviolet (UV)-curing agent to form semi-interpenetration polymer network structures after UV exposure. The influences of different curing agents on the thermal stability, adhesion performance, gel fraction, and viscoelastic of PSAs were explored. The results showed that the PSAs cured by L75, GA240, and TMPTA exhibited excellent heat resistance. Especially, when the content of L75 was 1.0 wt %, the PSAs could be peeled off substrate without residues on substrate surface after treatment at 170 °C for 4 h, while the nonmodified acrylic PSAs possessed residues after treatment from 110 °C. The cured PSAs adhesive performance was evaluated showing maximum 180° peel strength of 16.7 N/25 mm comparable to current PSAs. These resulting PSAs showed high heat resistance and they are suitable for a broad range of special fields. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47310.
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CHEMICAL ENGINEERING JOURNAL
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2018
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IF 6.735
Xiuwei Ao,Wenjun Sun,Simiao Li,Chao Yang,Chen Li,Zedong Lu
This study employed the medium pressure UV/peroxymonosulfate (MPUV/PMS), a new sulfate radical-based advanced oxidation process, to eliminate tetracycline (TTC) in water. At pH = 3.7, initial TTC concentration of 11.25 μM, PMS dosage of 0.2 mM and UV dose of 250 mJ cm −2 , 82% of TTC was degraded by MPUV/PMS. The second-order reaction rate constants of TTC with SO 4 − and OH were found to be 1.4 × 10 10 M −1 s −1 and 6.0 × 10 9 M −1 s −1 , respectively. Radical quenching experiments indicated that OH played the major role in the degradation of TTC. Higher PMS dosage (0.1–1.0 mM) and higher pH (3–11) could accelerate the TTC removal. Besides, the presence of Cl − (0.1–5.0 mM) and CO 3 2− (0.05–0.5 mM) could also promote the reaction. Eight transformation products (TPs) were identified, and the potential degradation pathways mainly involved hydroxylation, demethylation and decarbonylation processes. The variation in the genotoxicity was investigated using the umu -test, and the results indicate that the genotoxicity of TTC after the MPUV/PMS treatment significantly increased during the initial stage. In addition, the ecotoxicity and mutagenicity of TTC and its TPs were predicted using quantitative structure-activity relationship (QSAR) analysis, and the results revealed that some TPs could have equivalent and even higher toxicity than TTC. MPUV/PMS showed better performance in TTC degradation in real waters than in Milli-Q water. MPUV/PMS is concluded to be an efficient method for removing TTC, but more attention should be paid to the changes of toxicity during this process.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2019
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IF 7.65
Mengjie Zhang,Wenjing Ma,Jiaxin Cui,Shutian Wu,Jingquan Han,Yan Zou,Chaobo Huang
As oily wastewater issues continue to grow, the treatment of oily wastewater has become urgent an emergency. However, present solutions are restricted by the limited performance of materials. An UV-resist and transparent coating consisting of PDMS and ZnO decorated on a highly stable and self-standing polyimide is reported in this work as a potential solution. The obtained fibrous membranes not only allow high-efficiency (higher than 99%) oily wastewater separation but also show superior UV-resistant activity. Moreover, the superoleophilicity and hydrophobicity of the composite membrane were confirmed to be stable under harsh conditions, and the transparent coating layer has the potential to be applied in other fields. The design of the UV-resistant, transparent and superoleophilic nanofibrous membrane is very practical, and will be quite promising for reducing oily environmental contaminations from waters.
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PubMed
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
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2019
·Vol. 125
·期 4
·1-12
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IF 1.784
Feng Libang,Wang Jing,Shi Xueting,Chai Changsheng
Abstract It is the prerequisite of improving the universality, stability, and wear resistance of superhydrophobic materials for the practical applications. A simple and environment-friendly method is developed herein for constructing superhydrophobic copper surface by hydrothermal method. The wettability, surface microstructure, phase structure, and chemical structure of superhydrophobic Cu 2 S-coated copper surface are examined by contact angle measurement, SEM observation, XRD measurement, FT-IR and EDS analyses. Results show that the superhydrophobic Cu 2 S-coated copper surface is composed of a large number of Cu 2 S crystals grafted with long hydrophobic alkyl chains, and which leads to the superhydrophobic copper presenting a rough and hierarchical surface with micro- and nano-scaled binary structure. It is noteworthy that 200 °C of heat treatment has marked influence on the surface microstructure and wettability. Consequently, the mechanical durability of the superhydrophobic copper has been improved greatly upon heat treatment. Just ground on both the hierarchical surface and grafted long hydrophobic alkyl chains as well as heat treatment, the as-prepared superhydrophobic copper surface exhibits not only good mechanical durability and corrosion resistance, but also excellent chemical and UV durability as well as self-cleaning effect. This method provides a novel and simple process to protect the surface of copper. It is believed that such technique may open a new approach to expand the application of copper. Graphical abstract A simple and environment-friendly method is developed for constructing superhydrophobic copper surface by hydrothermal method. Ground on both the hierarchical surface and grafted long hydrophobic alkyl chains as well as heat treatment, the as-prepared superhydrophobic surface exhibits not only good mechanical durability and corrosion resistance, but also excellent chemical and UV durability as well as self-cleaning effect.
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RSC Advances
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2019
·Vol. 9
·期 44
·25797-25804
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IF 3.049
Shunli Ji,Hongbin Gao,Xingya Xia,Feng Zheng
Benzyl halides, widely used as alkylation reagents in drug synthesis, are potential genotoxic impurities (PGTIs) required to be controlled at trace levels. However, the existing analytical methods for benzyl halides often suffer from matrix interferences or low derivatization efficiency of benzyl chlorides. In this paper, a simple derivatization HPLC-UV method was developed for the analysis of these residual trace benzyl halides in drug substances. 1-(4-Nitrophenyl) piperazine (4-NPP) was selected as a new derivatization reagent because it shifted well the benzyl halides derivatives away to the near visible range (392 nm), which could minimize the matrix interferences from the drug substances and related impurities. Meanwhile, potassium iodide (KI) was used to convert the mixed benzyl halides into benzyl iodides before derivatization. The derivatization parameters were also optimized using the design of experiments (DoE) for achieving the best reaction efficiency. The results showed that the new approach had high specificity and sensitivity, and the LOQs were 7–9 μg g−1 relative to 5 mg mL−1 antipyrine and 17.5–22.5 μg g−1 relative to 2 mg mL−1 oroxylin A. The method is a valuable alternative for the determination of residual benzyl halides in the drug substances.
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PubMed
高影响因子
Journal of Cleaner Production
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2018
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IF 5.651
Chunhong Li,Hang Xiao,Xianfeng Wang,Tao Zhao
The energy consumption and environment pollution play an important role to the sustainable development in the dyeing and finishing industry. The aim of this study is to synthesize a series of acrylated epoxidized soybean oil based UV-curable polyurethane pigment adhesives and to reduce the consumption of energy and environment pollution in pigment printing process. The chemical composition was evaluated using fourier transform infrared spectra and nuclear magnetic resonance hydrogen spectroscopy. The thermal properties of UV-cured films were discussed by thermalgravimetric analysis (TGA) and differential scanning calorimetry (DSC). In addition, the effects of AESO content on particle size, water swelling properties and contact angles of the emulsions and films were investigated. Furthermore, the color yield, the rubbing fastness and washing fastness of the printed fabrics with acrylated epoxidized soybean oil based UV-curable polyurethane as adhesive were evaluated. The application of vegetable oil-based urethane acrylate pigments of cotton fabrics is a cleaner method that can reduce the consumption of energy and environment pollution. Compared to conventional thermally curable coatings, the UV-curable vegetable oil-based urethane acrylate pigment prints adhesive does not require a large amount of water and energy, indicating that vegetable oil-based urethane acrylate pigments have potential application in the cleaner production of textile industry .
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2018
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IF 6.735
Kai Yin,Lin Deng,Jinming Luo,John Crittenden,Chengbin Liu,Yuanfeng Wei,Longlu Wang
Phenicol antibiotics (PABs) degradation by UV/H 2 O 2 is important because we need to determine the reduction in toxicity and disinfection byproducts for post-chlorine. In this study, the degradation of PABs, including florfenicol (FLO), chloramphenicol (CAP) and thiamphenicol (THA), was examined. The pseudo-first order degradation rate constants of PABs were 3 times higher in ultrapure water (UW) than that in synthetic wastewater (SW) for these conditions: [PABs] 0 = 1 μM, [H 2 O 2 ] = 0.1 mM, and I 0 = 1.985 × 10 −6 E L −1 s −1 . Fulvic acid (FA) and HCO 3 – inhibited PABs degradation, Cl − and NO 3 – concentrations of up to 5 mM and 10 mM had a negligible impact. The impact of water matrix on PABs degradation was successfully predicted using pseudo-steady-state kinetic model. The degradation of PABs was triggered via hydroxylation and/or hydrogen abstraction. The treatment of PABs via UV/H 2 O 2 could decrease their antimicrobial properties, while the byproducts of FLO and THA showed higher acute toxicity in Vibrio fischeri . In addition, two identification products (TP-276 and TP-354) of FLO had higher ecotoxicity toxicity (using ECOSAR) in fish, daphnid and green algae. The trichloromethane formation potential (TCMFP) for PABs with post-chlorination in UW and SW can be reduced after UV/H 2 O 2 compared to UV, and is related to the corresponding decrease of dissolved organic carbon (DOC).
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2018
·
IF 6.735
Junhe Lu,Peizeng Yang,Wei Dong,Yuefei Ji,Qingguo Huang
Benzophenone-4 (BP4) is UV-filter that is widely in sunscreens and cosmetics to prevent skin damage from sunlight exposure. Washing off of BP4 from the human body in swimming pools represents a direct source of BP4 in the environment. In this study, we investigated the transformation of BP4 by free chlorine, chloramine, and UV/chlorine, which can be found in swimming pool water. It was found that BP4 can be rapidly removed by both chlorine and chloramine treatment, but only chlorination led to appreciable formation of chlorinated disinfection by-products (DBPs), such as dichloroacetic acid and trichloroacetic acid . However, chloramination of BP4 resulted in higher levels of chlorinated intermediates, which were relatively recalcitrant to further chlorination. The UV/chlorine process was significantly more efficient than the chlorine treatment alone for BP4 removal and resulted in trace chlorinated intermediates and formation of DBPs. Radical scavenger tests revealed that the removal of BP4 in the UV/chlorine process was mostly ascribed to reactions with the Cl and OH generated from HClO photolysis. The presence of methanol as a radical scavenger resulted in incomplete removal of BP4 in the UV/chlorine process and enhanced the formation of DBPs. The increase in DBP formation was because the residual BP4 can be exited to a triplet state ( 3 BP4 ∗ ) upon UV irradiation. 3 BP4 ∗ subsequently reacted with O 2 to form 1 O 2 , a reactive oxygen species that generated DBPs by reacting with chlorinated intermediates in water. All benzophenone-type UV-filters may have similar photochemical activity and thus influence the transformation of other organics in sunlit surface water environments.
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高影响因子
RSC Advances
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2018
·Vol. 8
·期 59
·33681-33687
·
IF 2.936
Xing Zhang,Jilun Yao,Wei Peng,Wensi Xu,Zhongguo Li,Chong Zhou,Zhendong Fang
Response surface methodology (RSM) was utilized to model and optimize the dichloroacetonitrile (DCAN) degradation process by UV/PMS. A quadratic function between DCAN degradation efficiency and three factors including dosage of PMS, UV power and retention time was obtained. The model fitted very well according to high the value of R2 (0.9919) and Adj-R2 (0.9814). Additionally, the analysis of variance showed the influence of factors on degradation efficiency followed: retention time > UV power > dosage of PMS. Finally, the optimum conditions were suggested under this model. The degradation efficiency reached the maximum value of 96.2% with the optimum conditions: dosage of PMS = 0.2 mM, UV power = 7.95 W, retention time = 80 min.
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高影响因子
POLYMER DEGRADATION AND STABILITY
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2018
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IF 3.193
Hao Yang,Hui Zhang,Henglun Cheng,Baoqing Shentu
Nano-TiO 2 immobilized antioxidant (TiO 2 -KH550-AG) was prepared to improve the ageing resistance of thermoplastic vulcanizate (TPV) exposed to UV/O 3 . TiO 2 nanoparticles were firstly modified with 3-aminopropyltriethoxysilane (KH550) and then reacted with the antioxidant , 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid (AG), through the acyl chloride reaction followed by the amidation. FT-IR, XPS and TGA measurements confirmed that the antioxidant (AG) was chemically immobilized onto the nano-TiO 2 surfaces. TPV/TiO 2 -KH550-AG nanocomposites were prepared by melt mixing. SEM observation showed that TiO 2 -KH550-AG was homogeneously dispersed into the matrix of TPV. The UV/O 3 ageing test of the samples was carried out in the environment with constant UV intensity of 1.40 mW/cm 2 and ozone concentration of 100 ± 4 mg/m 3 . The ageing resistance behavior of the TPV/TiO 2 -KH550-AG nanocomposites was evaluated by the changes of surface morphology , mechanical properties and carbonyl index during the UV/O 3 ageing test. It was observed that the TPV/TiO 2 -KH550-AG exhibited high stability during the process of UV/O 3 ageing. The results revealed that the anti-ageing efficiency of TiO 2 -KH550-AG was superior to the mixture of the corresponding AG and modified TiO 2 , owing to the better dispersion and migration resistance of TiO 2 -KH550-AG.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2018
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IF 2.829
Chi Jiang,Weiqu Liu,Maiping Yang,Chunhua Liu,Sha He,Yankun Xie,Zhengfang Wang
We present a facile and an inexpensive approach to prepare robust fluorine-free self-cleaning cotton textiles by surface modification with anatase TiO 2 sol and polydimethylsiloxane (PDMS) using a simple dip-coating method. The synergetic effect of the anatase TiO 2 particles and PDMS was critical and essential for obtaining a superhydrophobic coating with photocatalytic activity and UV durability. The coated cotton textiles not merely exhibited desirable superhydrophobic property with a water contact angle (WCA) of 153.8°, but also performed the considerable photocatalytic activity by the decomposition of oil red O under UV exposure. Importantly, the as-obtained self-cleaning cotton textiles were stable under various harsh conditions such as acidic, alkaline, corrosive organic solutions, and laundering. Moreover, the coated cotton textiles could also maintain its superhydrophobicity when exposed to long-term UV irradiation , displaying its excellent UV resistance. Therefore, this simple preparation approach can be regarded as a promising way to construct self-cleaning surfaces for scale up production.
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高影响因子
危险品化学品经营许可证（带存储）