JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Junchao Zhao,Zhitao Yin,Muhammad Usman Shahid,Haoran Xing,Xudong Cheng,Yangyang Fu,Song Lu
The re-ignition of pool fires is a common hazard phenomenon in fire extinguishing. Dry chemicals with oleophobicity may solve this problem because powders can float on the oil surface and prevent evaporation of fuel pool. In this research, MAPP (modified ammonium polyphosphate) with superhydrophobicity, oleophobicity, and higher chemical activity is prepared which can quickly quench pool fires and provide longer protection. The activation indexes of MAPP for water, diesel , aviation kerosene and gasoline are 98.5%, 87.4%, 98.7% and 98.4%, respectively. Lower activation energy of MAPP means that it will show higher chemical activity in fire. The fire-extinguishing performance of MAPP is much higher than that of Commercial UDCA (ultra-fine dry chemical agent) during fire experiments. After extinguished by MAPP, the fuel pool is hard to be re-ignited. The significance of this study is to propose a new strategy for preventing the re-ignition of pool fires.
研究领域:
材料科学
·
消防工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Shanshan Wang,Chaohu Xiao,Shun Lu,Haijing Lu,Qi-Meige Hasi,Yuhan Zhang,Xingping Luo,Lihua Chen
Solar steam generation (SSG) is an effective way to mitigate the freshwater crisis. However, challenges still remain in scalable preparation, cost-effectiveness, and expanding the scope of practical applications for photothermal materials. Herein, a biomass-based solar steam generator (named OR-INP) with salt-resistant, oil-repellent, and anti-fouling performances is fabricated by grafting poly(ionic liquid)s onto celluloses from waste newspapers and then conducting oil-repellent modification. Benefiting from the broad solar absorption in the wet state (ca. 92%), low thermal conductivity (0.1108 W m–1 K–1), and strong hydrophilic and oleophobic properties, the solar evaporation efficiency is as high as 93.25% for pure water, 84.96% for 20 wt % NaCl, and 78.46% for 5 wt % oily wastewater, under 1 sun irradiation. Moreover, the aerogel still has excellent purification effects on solutions which contain organic dyes, heavy metal ions, or bacteria. Therefore, combining the merits of salt resistance, oil repellency, and wastewater treatment, this work develops the prospect of employing waste biomass resource-based photothermal materials and expands the practical application range of biomass-based evaporators.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2020
·
IF 4.469
Shuai Luo,Xiao-Xi Peng,Yun-Fei Zhang,Ping Fu,Fei-Peng Du
In order to improve the oil-repellent and antifouling ability of the antifog coatings, a poly(vinyl alcohol)/hydrolyzed poly (styrene-co-maleic anhydride)/fluorocarbon surfactant (PVA/H-PSMA/FC) was prepared by incorporating a fluorocarbon surfactant into PVA/H-PSMA via hydrogen bonds. The microstructure, antifog and oil-repellent properties were investigated in our study, and the results indicate that the strong interaction between the PVA/H-PSMA and the FC provides a good fixation for the FC inside or on the surface of the coatings. The water contact angle (WCA) ranges from 59° to 69° and the oil contact angle (OCA) ranges from 35° to 50°, which means that the PVA/H-PSMA/FC coatings are hydrophilic and oleophilic. The results also demonstrate that the prepared PVA/H-PSMA/FC coating exhibits excellent antifog properties and high transparency. Moreover, the oil droplets may slip off the coating surface without any residue and the glide angle is below 12°. A low content of FC loaded creates a large space between FC molecules, thus providing enough hydrophilicity on the PVA/H-PSMA surface and achieving excellent antifog performance. Meanwhile, the mobile fluorinated alkyl chains on the surface can be reorganized and act as “slides” to easily move oil droplets at low TA, providing oil repellency. The excellent oil-repellency makes the transparent PVA/H-PSMA/FC antifog coatings have potential application prospects in the field of surface protection of optical equipment and solar panel.
研究领域:
材料科学
·
表面化学
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2021
·
IF 7.267
Shujing Zhao,Miaomiao Xia,Yuhan Zhang,Qi-Meige Hasi,Juanjuan Xu,Lihua Chen
Solar steam generation (SSG) has emerged as one of renewable and environmentally friendly technologies for production of fresh water . Here, we demonstrate the preparation of a novel oil-repellent photothermal materials based on copper foam (CF) for efficient SSG. Only by a simple chemical oxidation treatment on CF (named as R–CF), the smooth CF skeleton changes to be rough, leading to an enhanced light absorption of up to 90% which is far higher than that of untreated CF (10–70%). By combination of its high porosity (89.6%) and high specific surface area (230 m 2 g −1 ), the R–CF shows superior ability on SSG as well as salt-resistance, i.e., its evaporation efficiency in water and high saline solution reaches 85.25% and 70.19% under 1 kW m −2 irradiation, respectively. In addition, R–CF was further treated by a surface chemical modification to achieve hydrophilicity while oil-repellent wettability (named as OR-R-CF), enabling it solar vaporization even in oily water, e.g., an evaporation efficiency of 77.0% was obtained in oily water, which is great advantageous to those existing photothermal materials usually suffer the drawbacks of poor oil-repellent or anti-fouling property and thus shows significant potentials for practical SSG applications in both seawater and oily water.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Materials Today Energy
·
2021
·
IF 7.311
M. Xia,S. Zhao,Q.-M. Hasi,Y. Zhang,L. Li,L. Chen
Solar steam generation (SSG) has emerged as one of the most efficient strategies for desalination and sewage treatment. In this work, we present an approach for the fabrication of a novel oil-repellent solar photothermal material (named as O-WF-HNTs), which is derived from wood fibers (WF) and halloysite nanotubes (HNTs) for efficient SSG. The porosity of the premodified sample (WF-HNTs) was about 89%, the light absorption was over 95%, and the thermal conductivity was 0.206 W m −1 k −1 . Under the irradiation of 1.0 kW m −2 , the solar energy conversion efficiency reaches up to 84% with better salt tolerance (the evaporation efficiency in 10% NaCl solution is 76%). After a surface modification, interestingly, the wettability of the as-resulted O-WF-HNTs changes to be hydrophilic and oil-repellent. The solar energy conversion efficiency of the O-WF-HNTs can reach as high as 79% in oily water under 1.0 kW m −2 illumination, while the untreated sample, i.e. WF-HNTs, only shows a very low solar energy conversion efficiency of 48% due to n-hexadecane blocks the channels of material and in turn hinders water transportation during solar vaporization. Compared with the existing photothermal materials, which usually suffer the shortcomings of either complicated preparation or oleophilic property, our materials take the advantages of a simple, cost-efficient, and scalable fabrication process with low-cost natural clay and wood fibers as raw materials, in particular oil-repellency which makes it possible for SSG even in oily water or sewage, thus the practical application of SSG is further broadened.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
NANO LETTERS
·
2021
·
IF 11.189
Yi Yang,Yachao Zhang,Yanlei Hu,Guoqiang Li,Cong Zhang,Yuegan Song,Longfu Li,Caiding Ni,Nianwei Dai,Yong Cai,Jiawen Li,Dong Wu,Jiaru Chu
Natural organisms can create various microstructures via a spontaneous growth mode. In contrast, artificial protruding microstructures are constructed by subtractive methods that waste materials and time or by additive methods that require additional materials. Here, we report a facile and straightforward strategy for a laser-induced self-growing mushroom-like microstructure on a flat surface. By simply controlling the localized femtosecond laser heating and ablation on the poly(ethylene terephthalate) tape/heat-shrinkable polystyrene bilayer surface, it is discovered that a mushroom-like architecture can spontaneously and rapidly grow out from the original surface within 0.36 s. The dimension of the re-entrant micropillar array (cap diameter, pillar spacing, and height) can be accurately controlled through the intentional control of laser scanning. Followed by a fluorination and spray coating, the obtained surface can realize the repellency and manipulation of oil droplets. This work provides new opportunities in the fields of microfabrication, microfluidics, microreactor engineering, and wearable antifouling electronics.
研究领域:
材料科学
·
微纳米技术
·
表面工程
·
仿生学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Changqing Miao,Yujia Tong,Fiona Hammond Quarcoo,Xiaohui Ju,Weixing Li
Mussels in nature can adhere to the surface of hydrophobic substances by secreting adhesive substances, which has attracted wide attention by coating method for membrane modification. However, complicated processing procedures remain major problems. Here, we proposed a simple, mild and fast surface coating method. Proanthocyanidins (PC) react with 3-aminopropyl triethoxysilane (KH550) under the accelerated action of the oxidant ammonium persulfate (APS) at room temperature to form a polyphenol network. The hydrophilic network coating was constructed on PVDF membrane by surface co-deposition method for 1 h, which could effectively separate different emulsions. The water permeability of modified membrane was 18,271 L∙m −2 ∙h −1 ∙bar −1 . The permeability for separating isooctane-in-water emulsion arrived at 14,223 L∙m −2 ∙h −1 ∙bar −1 and the oil rejection rate was 99.6 %. After ten cycles, the separation flux was 10,836 L∙m −2 ∙h −1 ∙bar −1 with the rejection rate of 98.8 %. Modified membranes were soaked in acid and alkali salt solutions of different pH values for 30 days, and maintained good underwater oleophobic performance (>156°). The developed membrane showed excellent separation performance, oleophobic property and acid-base stability. The proposed membrane modification strategy was prospective for efficient separation of oily wastewater.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2017
·
IF 4.364
Shusen Peng,Yongcun Ma
Special wetting surface with hydrophilic and oil-repellent characteristic is successfully prepared by treating hydrophilic PEGylated surface with CF 4 plasma. Wettability and structure of the modified PEGylated polymer surfaces are investigated by contact angle (CA) measurements and X-ray photoelectron spectroscopy (XPS). The results of contact angle measurements show that water CA and hexadecane CA have different dependences with CF 4 plasma treating time. After a 5 min treatment with CF 4 plasma, the difference between water and oil CA reaches a maximum value on the modified PEGylated surface, wherein water and oil CA is 30.7° and 60.7°, respectively. We believe the technique can be further used for construction of textiles with anti-contamination and easy-decontamination properties.
研究领域:
材料科学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 69
·39657-39666
·
IF 2.936
Xianhou Yang,Daning Lang,Ziyuan Wang,Jingjing Cao,Ronglan Wu,Wei Wang
Oil/water separation has been a challenge in chemical engineering for various applications. There are numbers of studies on using coated metal meshes as a filter for oil/water separation. However, water resistance, chemical (such as: acid, base, and fouling) resistance and heat resistance for coating materials need further exploration, especially in terms of the durability of the coating materials. In this study, we synthesized a new coating material, hydrophilic polycarbonate polyurethane (HPCPU). We used HPCPU to chemically modify a steel mesh, and the mesh exhibits superhydrophilic and underwater superoleophobic properties. The HPCPU coated mesh shows excellent capacity for oil/water separation with a separation efficiency higher than 99.99% even after 40 cycles of separation. The coating material also exhibits excellent properties of water resistance, heat resistance, and chemical resistance. Moreover, the HPCPU-coated mesh exhibits a strong durability. For example, the separation efficiency for various oil/water mixtures remains higher than 99.7% after the HPCPU-coated mesh has been soaked in water for 30 days, hot water for 5 days, oils for 5 days, 0.5 M HCl solution, 0.5 M NaOH solution and 0.5 M NaCl solution for 24 hours.
研究领域:
材料科学
·
化学工程
·
环境工程
·
表面科学
·
功能材料
·
分离技术
✓ 已验证
DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2024
·
IF 2.5
Lu Shun,Xiao Chaohu,Tian Qi,Mu Xiaotong,Yu Jiale,Hasi Qimeige,Zhang Yuhan,Chen Lihua
Although photothermal materials (PMs) are widely utilized in pure water and seawater, there is less research on the design and preparation of multifunctional photothermal materials with organic dye adsorption and oil displacement properties. In this study, biomass carbon aerogel (BC) was prepared through a simple Ca 2+ cross-linking and freeze-drying process. To enhance the antifouling performance of BC, hydrophilic and oleophobic chemical modification was conducted to obtain BC-SP. The contact angle of n-hexadecane can reach to 141.8°, which enable the extensive application of BC-SP in oil-bearing wastewater treatment. Notably, BC-SP exhibited exceptional light absorption efficiency (approximately 95%), excellent heat insulation performance (thermal conductivity 0.0650 W m − 1 K − 1 ), and rapid water transport capability. Under the irradiation of 1 kW m − 2 , the solar energy conversion efficiency can reach to 86.8%. After tested eight cycles, the evaporation efficiency remained relatively stable and can adsorb most organic dyes in dye wastewater. Therefore, the study of BC-SP in this paper may has broad practical application prospects.
研究领域:
材料科学
·
环境科学
·
化学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Chenjie Wei,Xihang Zhang,Shuyan Ma,Chengxiong Zhang,Yang Li,Dajing Chen,Hong Jiang,Zhikang Xu,Xiaojun Huang
The emerging solar-driven steam generation technology is considered as one of the most promising strategies for purifying seawater and wastewater, while it is still challenging to achieve superior evaporation rate, salt-resistant property and multi-media evaporation applications at the same time. Herein, an ultra-robust Janus PP hollow fiber membrane (PP HFM) with capillary-driven siphon and photothermal properties was fabricated. Dopamine (DA), (3-aminopropyl) triethoxy-silane (KH550), TiO 2 nanoparticles were immobilized on the inner surface of PP HFMs for turning from a common hydrophobic state to a hydrophilic state. An outer surface with hydrophobicity is constructed by chemical vapor deposition polymerization (CVDP) of polypyrrole (PPy). The fabricated PP-PDA/KH550/TiO 2 -PPy HFMs showed an asymmetric wettability (inner and outer water contact angle of 0° and 95°), mechanical strength of 1.2 GPa, and light absorption of 95%. Importantly, the low heat loss through decreasing contact area with water enabled vertically aligned HFMs with a superior solar evaporation rate of 3.65 kg/(m 2 ·h), and a high photothermal conversion efficiency of 229.13% under one-sun irradiation. Furthermore, the Janus PP HFMs showed a superior salt-resistance without salt crystals even in 20 wt% high salinity condition, rejections of ion (<10 ppm salt ions), oil (>99%), and dye (>99%), and excellent stability. The Janus PP HFMs evaporator provide a new paradigm for low heat loss, high evaporation rate, salt-resistant and multi-media purification.
研究领域:
材料科学
·
环境科学
·
太阳能
·
水净化
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 46
·26028-26035
·
IF 12.732
Jingyang Xu,Pengpeng Lu,Li Wang,Yong Fan,Weijun Tian,Jianing Xu,Jie Zhao,Luquan Ren,Weihua Ming
Antifogging coatings prepared by highly hydrophilic/superhydrophilic strategies are susceptible to general oil contamination, hence readily losing their activities. Herein, a stimuli-responsive antifogging/oil-repellent coating with a delicate balance between hydrophilic and oleophobic components was prepared via a UV-assisted cross-linking method. Initially, different contents of acrylate monomers, including acrylic acid (AA), 1H,1H,2H,2H-tridecafluoro-n-octyl acrylate (TFOA), and 4-benzoylphenyl acrylate (BPA) were thermally polymerized to obtain a series of terpolymers, poly(AA-co-TFOA-co-BPA). Afterwards, poly(AA-co-TFOA-co-BPA) was covalently tethered to varied substrate surfaces (i.e., glass slides, PC, PET, and PVC) through a UV triggered anchoring of BPA. Benefiting from the delicate balance between hydrophilic poly(AA) and oleophobic poly(TFOA), the resultant coating displays solvent sensitive stimuli-responsive wettability, driven by the encountered liquids with different surface tensions. Therefore, these coatings show excellent anti-fogging ability with ∼90% light transmission, in a wide temperature range from −20 °C to 85 °C, meanwhile, the coatings also display remarkably high oil-repellence with an extremely low sliding angle for low tension liquids. These findings support the development of functional coatings that can highly maintain antifogging performances while effectively avoiding oil contamination in various imaging, medical and analytical applications.
研究领域:
材料科学
·
化学工程
·
表面化学
·
高分子科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）