APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Yuqian Xiang,Youyou Pang,Xiaomei Jiang,Jie Huang,Fengna Xi,Jiyang Liu
Absorbent materials integrated with superhydrophobicity, superoleophilicity and flame-retardancy are highly desired in the adsorption/removal of flammable oils/organic compounds as well as reducing the risk of fire and explosion. Here, one-step fabrication of novel superhydrophobic and superoleophilic sponge with outstanding absorbency and flame-retardancy was presented. Using raw melamine (ME) sponge as the supporting matrix, the formation of polydopamine (PDA) nanoaggregates via in-situ self-polymerization of high-concentrated dopamine and the covalent grafting of hydrophobic n -dodecylthiol (DT) onto PDA were combined in a feasible alkaline water/ethanol medium. As investigated by scanning electron microscopy (SEM) and X-ray energy-dispersive spectroscopy (EDS), the as-prepared ME/PDA/DT sponge possessed hierarchical structure with submicron PDA nanoaggregates containing DT motif (low surface energy) on 3D interconnected porous network. It exhibited superhydrophobic (water contact angle 157.7°) and superoleophilic (oily/organic solvent contact angle 0° properties. Owing to the highly porous structure, superhydrophobic property, chemical and mechanical stability, the ME/PDA/DT sponge exhibited outstanding absorbency properties of oily organic solvents including fast absorption kinetics, high absorption capacity, and easy reusability. Also, the ME/PDA/DT sponge could be used for one-line continuous organic solvent/water separation. More interestingly, the ME/PDA/DT sponge demonstrated improved flame-retardant property as compared to the intrinsic flame-retardant nature of the raw melamine sponge. Consequently, the risk of fire and explosion was expected to reduce when the fabricated sponge was used as an absorbent for flammable oils and organic compounds. The ease of the one-step superhydrophobic/superoleophilic modification and the promising feature of the obtained materials exhibit great potential for application in oils/organic solvents clean-up.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
CELLULOSE
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2020
·Vol. 27
·期 7
·4007-4018
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IF 4.21
Zhang Tao,Zhao Yan,Silverstein Michael S.
Abstract Cellulose is one of the most abundant resources in nature. Cellulose-based porous monoliths have been fabricated by direct drying of oil-in-water high internal phase emulsions (HIPEs) stabilized using either cellulose derivatives or surface-modified cellulose. The resulting cellulose-based porous polymers, however, were usually fragile, reflecting the lack of crosslinking. Herein, we report a new strategy to fabricate cellulose-based porous materials (polyurethane polyHIPEs, PU polyHIPEs) templated within non-aqueous HIPEs through the covalent crosslinking between isocyanates and unmodified cellulose. The PU polyHIPEs exhibited interconnected macroporous structures and exhibited tunable wettability from hydrophilicity/oleophilicity to hydrophobicity/oleophilicity. The PU polyHIPEs were able to absorb a wide variety of oils, exhibiting relatively large capacities and high absorption rates. We further showed that the PU polyHIPEs were robust, and they did not fail under compressive stress even at strains of 70%. The robustness, large absorption capacities, rapid absorption, and hydrophobicity/oleophilicity make these cellulose-based PU polyHIPEs suitable for oil absorption and/or oil–water separation applications. Graphic abstract
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Natural Fibers
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2020
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IF 2.622
Chun-Hui Chen,Sidra Saleemi,Xiao-hua Liu,Yi-ping Qiu,Fu-Jun Xu
In this paper, the method of “hydrophobic modified coating” was used by introducing the low surface energy hydrophobic groups and silica nanoparticles on the surface of towel fabric. A hydrophobic lipophilic cotton fabric with biodegradability and super absorbent capacity was prepared by modifying the surface by silica nanoparticles. The surface structure was characterized by Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscope (SEM). The performance indexes such as oil absorption ratio and oil retention rate were tested and evaluated. The results revealed that the hydrophobicity and oil absorption properties of the cotton fabrics were significantly improved after hydrophobic modification. The water contact angle is 140° and the oil contact angle is 0°, showing strong hydrophobicity of the modified fabric. In addition, the modified cotton fabric had an oil retention rate of 84.6%, which can be avoided as secondary pollution during the recycling of saturated pure cotton fabric. Moreover, the cotton fabric with residual oil can be used for power generation fuel, high fever, high enthalpy, and flammable ashless products.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Yongzhen Wang,Xiang Yu,Weiqiang Fan,Rulin Liu,Yuyan Liu
Oil spills threaten ecosystem and health seriously. Porous foams have been proved as ideal candidates for oil absorbents, however, many with poor oil retention (re-bleeding). Here, we creatively developed a composite foam oil absorbent capable of oil absorption and oil gelation , based on porous alginate foam and hydroxyl aluminum stearate oil gelator . The microstructure of alginate foam can be adjusted by the addition of t-butanol in the solvent, and long alkyl chains of gelator endow foam skeleton with good hydrophobicity , avoiding secondary pollution from traditional hydrophobic chemical modification. Interconnected skeleton decorated by oleophilic gelators contributes to high oil absorption. Oleophilic gelator can self-assemble into 3D network to entrap oils to form gels, giving rise to effective oil retention, realizing the integration of high oil absorption and oil retention. The natural abundant, low-cost composite foam would be promising for tackling oil spills.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER
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2022
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IF 4.432
Pengfei Chen,Dongyu Bai,Hua Tang,Huili Liu,Jianchuan Wang,Guangyong Gao,Lu Li
Recently, polylactide (PLA) aerogel has been considered as an ideal oil-water separation and oil absorption material due to its renewability, biodegradability , considerable mechanical and processing performance. However, the practical application of PLA aerogel still faces some obstacles like inferior heat resistance, poor durability, and unsatisfactory oil-water separation and oil absorption performances. In this work, a promising strategy of constructing different amounts of stereocomplex (SC) crystallites in PLA aerogels via blending poly(L-lactide) (PLLA) with various amounts of poly(D-lactide) (PDLA) is devised to simultaneously overcome these obstacles. The results reveal that the formation of SC crystallites can not only improve the heat resistance and degradation resistance of the SC-type PLA (SC-PLA) aerogels, but also result in many nanopores on the pore walls of SC-PLA aerogels upon freeze-drying. SC-PLA aerogels with such special porous structures exhibit good hydrophobicity , excellent oil-water separation capability, and high absorption capacity for various oils and organic solvents . Specifically, the absorption capacity of SC-PLA50 aerogel can reach 42 times to its own weight, and good cycling stability of SC-PLA50 aerogel is confirmed by the absorption/evaporation cycling experiments. We believe this high-performanced SC-PLA aerogel can be applied in oil spill accidents and industrial wastewater pollution treatments.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 15
·2670
·
IF 5.719
Jizhen Yang,Fan Li,Guibin Lu,Yuanbin Lu,Chuanbo Song,Rong Zhou,Shaohua Wu
Crude oil spills seriously harm the ocean environment and endanger the health of various animals and plants. In the present study, a totally biodegradable polymer, poly(L-lactic acid) (PLLA), was employed to fabricate highly porous oil absorbent nanofibrous materials by using a combination of electrospinning technique and subsequent acetone treatment. We systematically investigated how the electrospinning parameters affected formation of the porous structure of PLLA nanofibers and demonstrated that PLLA nanofibers with decreased and uniform diameter and improved porosity could be rapidly prepared by adjusting solution parameters and spinning parameters. We also demonstrated that the acetone treatment could obviously enhance the pore diameter and specific surface area of as-optimized electrospun PLLA nanofibers. The acetone treatment could also improve the hydrophobic property of as-treated PLLA nanofiber membranes. All these led to a significant increase in oil absorption performance. Through our research, it was found that the oil absorption of PLLA nanofiber membrane increased by more than double after being treated with acetone and the oil retention rate was also improved slightly.Keywords:PLLA;electrospinning;porous structure;acetone post-treatment;oil absorption
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2022
·
IF 10.383
Zhongjie He,Xiaoqian Li,Hongni Wang,Fangfang Su,Dechao Wang,Dongdong Yao,Yaping Zheng
The performance of graphene aerogels (GAs) is based on the microstructure. However, GAs face a challenge of simultaneously controlling the size and alignment of pores strategically. Herein, we initially proposed a simple strategy to construct GAs with an adjustable structure based on the emulsion and ice dual template methods. Specifically, GAs with a honeycomb structure prepared by conventional freezing (CGAs) exhibited a high specific surface of 176 m2/g, superelasticity with a compressive strain of 95%, isotropic compression and thermal insulation performances, as well as an excellent absorption capacity of 150–550 g/g. Instead, the GAs with a bamboo-like network frozen by unidirectional freezing (UGAs) showed anisotropy in compression and thermal insulation behavior. Furthermore, UGAs exhibited incredible special stress (7.9 kPa cm3/mg) along the axial direction twice than that of the radial direction. Meanwhile, the apparent temperature of UGAs was only 45.6 °C when placed on a 120 °C hot stage along the radial direction. Remarkably, the properties of CGAs and UGAs were significantly improved with the adjustment of the microstructure.
研究领域:
材料科学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 51
·29600-29608
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IF 3.049
Jianyu Xia,Zhulan Liu,Yan Chen,Zhiguo Wang,Yunfeng Cao
Herein, thermo-sensitive lignocellulose hydrogels with varying lignin contents were fabricated with N-isopropylacrylamide (NIPAAm) by a semi-interpenetrating polymer network (SIPN) strategy using a LiCl/DMSO solvent system. Soda lignin mixed with the lignocellulose/LiCl/DMSO solution was also used to prepare the composite hydrogels, and the influence of the existential state of lignin on the hydrogel properties was analyzed objectively. The SIPN hydrogels exhibited more favorable mechanical properties due to the physical entanglement of poly-NIPAAm and lignocellulose. The presence of externally added lignin in the composite hydrogels is beneficial for mechanical improvement. Both the mechanical properties and the morphologies of the SIPN hydrogels can be tuned by varying the existential state and content of lignin. Furthermore, the prepared SIPN hydrogels showed rapid conversion from being hydrophilic at 20 °C to being hydrophobic at 45 °C. All SIPN hydrogels exhibited obvious oil absorbency in an oil/water mixture at 45 °C. Moreover, the different lignin existential states in the hydrogels resulted in different lower critical solution temperatures (LCST). This study provides a feasible route to produce reinforced thermo-sensitive hydrogels and develops a method for tailoring the morphology and the absorption properties of hydrogels by controlling the existential state and content of lignin.
研究领域:
材料科学
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生物质化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Yeqiang Lu,Zhiling Chen,Mengyao Wei,Zheng Li,Congjie Gao,Lei Qin,Lixin Xue
Oil spill remediation is critical for environmental protection and sustainable resource management, yet conventional absorbents often face challenges in balancing rapid uptake and efficient oil release. Biomass-based polymers, such as cellulose derivatives, offer significant advantages for constructing advanced absorbents due to their renewability and functional tunability. In this study, we developed smart methylcellulose (MC)-based foams with multi-crosslinked networks and thermal-induced volume shrinkage for high-performance oil absorption and controllable recovery. The smart foams exhibit low density (12.73 mgꞏcm −3 ), high porosity (97.09 %), and excellent oil absorption capacity (up to 112.7 g/g). Furthermore, the foams demonstrate rapid temperature-triggered contraction, enabling effective extrusion and recycling of absorbed oil. By incorporating MXene nanosheets, the volume-shrinking oil discharge of the foam can be well enhanced with the assistance of sun illumination (shrinking to 63 % of original volume within 30 min under 1 sun irradiation, accompanied by a surface temperature rise to 91.9 °C), which promotes oil recycling with reduced energy consumption. It is expected that the smart foams with large oil-absorbing capacity and photothermal responsive oil discharge property present a sustainable and energy-efficient solution for environmental remediation.
研究领域:
环境科学
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材料科学
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高分子科学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION SCIENCE AND TECHNOLOGY
·
2019
·
IF 1.354
Xiaohai Bu,Shengwang Chen,Dongxian Li,Jinghan Liu,Zusheng Hang,Zewu Zhang,Li Zhang
In this paper, novel flower-like hollow MoS2 microspheres (FHMs) were synthesized by a hydrothermal method using MF microspheres as template. The FHMs were hydrophobically modified and utilized as porous fillers to fabricate FHMs/acrylic resin composites through suspension polymerization. The oil-absorption tests revealed that the composite with 4 wt% FHMs had a high oil-absorption capacity, which might be due to the synergistic absorption effect of organic and inorganic components. Their high absorption capacity, rapid absorption rate, and excellent reusability make them attractive options as absorbents for practical oil/water separation.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2025
·
IF 14.2
Yue Lian,Xilin Wang,Hong Chen,Yong Hu,Mengqi Liang,Qiaoyu Huang,Zhaoxia Chen,Yong Liu,Yuhong Zhang
With the rapid development of industrial activities, oil spills have occurred frequently at sea, causing increasingly severe ecological damage and environmental pollution. However, traditional superhydrophobic sponges can only adsorb low-viscosity oils and are ineffective for high-viscosity crude oils with poor fluidity. Therefore, there is an urgent need to develop novel materials capable of effectively addressing crude oil spills. In this paper, LA-MOF was prepared by modifying zirconium-based metal-organic framework (UiO-66-NH 2 ) with lauric acid (LA), and a photothermal superhydrophobic sponge (LA-MOF@PDA@MS) was fabricated by sequentially depositing polydopamine (PDA) and LA-MOF onto melamine sponges (MS). The resulting LA-MOF@PDA@MS exhibits excellent water repellency, with a water contact angle (WCA) of 155.5°, along with good self-cleaning properties, chemical stability, and mechanical durability. The modified sponge demonstrates an oil absorption capacity ranging from 28.60 to 56.83 g/g, with separation efficiencies exceeding 97 % for the select oils. Moreover, the LA-MOF@PDA@MS exhibits remarkable photothermal performance, capable of elevating its temperature to 68.3 °C within 300 s under simulated sunlight irradiation. The heating capability significantly reduces the viscosity of crude oil, enabling efficient absorption. The sponge achieves a saturated crude oil uptake of 60.7 g/g with a transfer rate of 5.49 g/min. Furthermore, the modified sponge displays excellent anti-icing and antimicrobial properties, further extending its service life in practical applications. These superior characteristics make the LA-MOF@PDA@MS sponge a highly promising candidate for oil spill remediation.
研究领域:
环境科学
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材料科学
·
化学工程
·
纳米技术
·
海洋污染治理
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF PHARMACEUTICS
·
2022
·
IF 6.51
Zhaolun Zhang,Xi Zhang,Zhengpeng Fu,Lihua Cao,Ziyi Xiong,Ying Tang,Yongjun Feng
This paper presents a facile approach to develop palygorskite (Pal), a fibrous clay mineral, as a delivery system of tea tree oil (TTO) for topical acne therapy. The obtained TTO-Pal composite showed an efficient loading of TTO (27.4%) with a selective accumulation of terpine-4-ol and 1,8-cineole (two major antimicrobial TTO constituents), sustained release of TTO at skin physiological conditions (pH5.4, 32 °C) and superior skin sebum (2.2 g/g) absorbability. In vitro toxicological assessments showed that the Pal incorporation strategy significantly reduced the acute contact toxicity of TTO. The antimicrobial results revealed a preferable bacteriostatic effect for the TTO-Pal system towards opportunistic dermal pathogens ( Escherichia coli , Staphylococcus aureus and Propionibacterium acnes ) over the beneficial bacterium ( Staphylococcus epidermis ). Moreover, TTO-Pal based formulations exhibited pronounced clinical therapeutic efficacy in treating facial acne by rapidly reducing inflamed lesions, modulating skin sebum overproduction and restoring barrier function. This is the first report of using fibrous clay as a biocompatible nanocarrier system for topical delivery of essential oils in efficient management of facial acne with both in vitro and in vivo evidences, which may open perspectives for fibrous clay-drug delivery system in topical application and expand the high added value development of this mineral resource in the advanced healthcare fields.
研究领域:
药剂学
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纳米技术
·
皮肤科
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）