JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 54
·期 13
·9995-10008
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IF 3.442
Zeng Mengxiang,Wu Wei,Fang Jianjun,Li Sufang,Zhou Zhihua
Effective wastewater remediation requires the development of suitable adsorbents. In this study, a strategy based on electrostatic interactions between the amino groups of chitosan and the anionic groups of acid dyes was developed for the removal of acid dyes from aqueous solution. By adjusting the fabrication parameters, chitosan/alginate porous sponges with controlled specific areas and pore structures were obtained. To enlarge the adsorption area, the adsorbents were processed via a freezing and lyophilization method to form three-dimensional porous sponges. Acid dyes in aqueous solution were adsorbed by the porous sponges, mainly through an electrostatic interaction mechanism. When the molar ratio of chitosan to alginate was fixed at 1.5:1, the porous sponges showed a maximum adsorption removal capacity of 1468.9 ± 16.3 mg g −1 for acid red B14 at a dye concentration of 150 mg L −1 and pH of 2. The adsorption capacity of this system was significantly enhanced compared with those of control groups such as chitosan powder. Thus, chitosan porous scaffolds provide a novel method for improving the removal capacities of chitosan-based materials for cleanup of acid–dye-contaminated water.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 27
·16350-16360
·
IF 10.7
Mengdie Chen,Yuhao Wang,Mohan Yang,Lei Zhang,Kai Wang,Dezhan Ye,Yanhu Zhan,Xiao Li,Weiying Zhang,Xiancai Jiang
Hydrophilic macroporous sponge has been widely used in solar steam generation, catalysis, biosensing and other fields due to its high water transporting and adsorption ability. However, the synthesis step of hydrophilic sponge usually needs the assistance of a freezing process and toxic chemicals such as chemical crosslinkers or foaming agents. To solve these problems, herein, a novel and facile tactic based on the salting out effect was proposed to prepare hydrophilic amphibious open-cell macroporous sponge from the poly(vinyl alcohol) (PVA) solution. Glycerol, CaCl2 and Na3Cit were successively added into PVA solution. The sol–gel transition would occur due to the salting-out effect of Na3Cit and hydrogen bond crosslinking of glycerol. Finally, the hydrophilic PVA sponge with different shapes and sizes could be easily prepared. Moreover, this hydrophilic wet sponge could be room temperature dried into dry sponge and this dry sponge could be quickly restored to wet sponge after immersing in water due to its ultra-rapid water absorption. The microstructure and mechanical properties of PVA wet and dry sponges were studied. The PVA wet sponge showed excellent mechanical properties with a tensile strength, Young's modulus, and fracture energy of 1.51 ± 0.01 MPa, 0.44 ± 0.02 MPa, and 113.2 ± 1.6 kJ m−2, respectively. The wet sponge prepared in this work has an average porosity of up to 50 μm, and the pore structure can still be maintained during the conventional room temperature drying process. Moreover, the PVA sponge showed high stability in various aqueous media including acid, alkaline, and salt solutions. This work provided a simple and large-scale method to prepare amphibious open-cell hydrophilic PVA sponge.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
ACS Nano
·
2020
·
IF 14.588
Pengchang Liu,Hua Lai,Xin Luo,Qixing Xia,Dongjie Zhang,Zhongjun Cheng,Yuyan Liu,Lei Jiang
Recently, smart liquid permeation has aroused much attention. However, existing strategies to achieve such a goal are often based on reversibly controlling hydrophobicity/hydrophilicity on static porous structures, which are unsuitable for oils with low surface tension, and meanwhile they cannot realize tunable permeation flux since the pore sizes are constant. Herein, we report a superlyophilic shape memory porous sponge (SSMS) that can demonstrate tunable pore size from about 28 nm to 900 μm as the material’s shape is changed. Based on the controllability in pore size, not only ON/OFF penetration but also precisely tunable permeation flux can be obtained for both water and oil. Furthermore, by using the SSMS, an application in accurate release of small-molecule rhodamine B was also demonstrated. This work reports a material with tunable pore size for controllable liquid permeation, which provides some ideas for designing smart superwetting permeation materials.
研究领域:
材料科学
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化学工程
·
表面科学
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产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2024
·
IF 8.1
Xiaojuan Yan,Tianyu Wang,Hongkun Yang,Ying Chen,Ning Wang,Ying Sui,Guanghui Gao
Emulsified oils and dye contaminants already pose a huge threat to global ecosystems and human health. It is a significant research topic to develop efficient, rapid, versatile methods for emulsion separation and dye adsorption. The membrane material modified with common methods only modified the outer surface of the membrane, while the interior is hardly fully decorated. In this investigation, a solvent exchange method was used to in situ grow nanoparticles in the interior of a porous sponge. These nanoparticles were obtained with polyethyleneimine, gallic acid, and tannic acid via Michael addition and Schiff base reaction. The prepared nanoparticle-coated sponges provided efficient separation of dyes, emulsions, and complex contaminants. The separation efficiency of the dye reached 99.49%, and the separation efficiency of the emulsion was as high as 99.87% with a flux of 11140.3 L m −2 h −1 . Furthermore, the maximum adsorption capacity reached 486.8 mg g −1 for cationic dyes and 182.1 mg g −1 for anionic dyes. More importantly, the nanoparticles were highly robust on the surface of the porous sponge, and the modified sponge could have long-term applications in hazardous environments. Overall, it is envisioned that the nanoparticles-modified porous sponge exhibited considerable potential for emulsion and dye wastewater treatment.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 30
·16224-16235
·
IF 14.511
Yushan Li,Song Yan,Ziwei Li,Siwei Xiong,Shiwen Yang,Luoxin Wang,Hua Wang,Xianjie Wen,Pingan Song,Xianze Yin
Developing novel absorbent materials with both rapid absorption speed and efficient recovery of viscous crude oils presents an enticing prospect for crude cleanup and utilization. Herein, a strategy to synergistically reduce the viscosity of crude oil by using solar-assisted chemical emulsifiers is proposed, which can directly modify commercial sponges to achieve rapid adsorption and efficient recovery of crude oil by using modified commercial sponges. SiO2 nanofluids (SiO2 nfs), which acted as amphipathic chemical emulsifiers, were confirmed by the molecular dynamics results to have a strong physical action and emulsification effect on crude oil. Benefiting from the synergistic advantages of the SiO2 nfs and photo-thermal properties of the dopamine layer, compared to a commercial polyurethane sponge, the modified sponge exhibited a 10% increase in absorption capacity and a three order of magnitude increase in viscous crude oil absorption rate, and its crude oil recovery rate remained stable at over 90% after 10 cycles. This novel, modified sponge with high porosity, flame retardance, and durability has excellent potential for practical viscous crude oil spill cleanup applications with fast recovery and efficient cleanup under harsh conditions. This convenient and efficient manufacturing technique can be extended to other commercial sponges and is suitable for the large-scale production of new adsorbent materials.
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
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yanfei Feng,Longxing Niu,Zixin Gao,Lin Zhu,Mingzhong Li,Qiang Zhang,Renchuan You
The composites composed of hyaluronic acid (HA) and silk fibroin (SF) exhibit great potential in diverse biomedical applications . However, the utilization of commercial crosslinkers such as 1,4-butanediol diglycidyl ether (BDDE) for crosslinking HA typically necessitates harsh conditions involving strong alkaline, which greatly limits its potential applications. In this study, a mild modified approach was developed to fabricate HA/SF blend sponges crosslinked by BDDE without alkaline conditions. The blend solutions were cryo-concentrated to induce crosslinking reactions. The mechanism of freezing crosslinking was elucidated by investigating the effects of ice crystal growth and HA molecular weight on the degree of crosslinking. The results revealed that HA achieved efficient crosslinking when its molecular weight exceeds 1000 kDa and freezing temperatures ranged from −40 °C to −20 °C. After introducing SF, multiple crosslinks were formed between SF and HA chains, producing water-stable porous sponges. The SEM results demonstrated that the introduction of SF effectively enhanced the interconnectivity between macropores through creating subordinate holes onto the pores wall. Raising the SF content significantly enhanced compression strength , resistance to enzymatic degradation and cell viability of blend sponges. This study provides a novel strategy for designing bioactive HA/SF blend sponges as substitutes for tissue repair and wound dressing .
研究领域:
生物材料学
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组织工程学
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DOI
高影响因子
Soft Matter
·
2021
·Vol. 17
·期 8
·2327-2339
·
IF 3.679
Caimei Zhao,Lei Chen,Chuanming Yu,Binghua Hu,Haoxuan Huang,Yongjie Chen,Xin Wang,Yongshi Ye,Xiaohui Zhuang,Yong Li
Super-hydrophobic porous absorbents are convenient, low-cost, efficient and environment-friendly materials in the treatment of oil spills. In this work, a simple Pickering emulsion template method was employed to fabricate an interconnected porous poly(DVB–LMA) sponge. A new co-Pickering stabilization system of Span 80 and NiFe2O4 nanoparticles was used to prepare ultra-concentrated internal phase water-in-oil (W/O) emulsions. After further polymerization, the resulting sponges were generated, which exhibited excellent adsorption selectivity due to the super-hydrophobicity and super-lipophilicity. Furthermore, the characterization results indicated that the composites had superior thermal stability, low density, high porosity and a flexible three-dimensional porous structure. Besides, the addition of nickel ferrite nanoparticles provided the materials with extra magnetic operability. High oil adsorption capacity (up to 36.9–84.2 g g−1), high oil retention, fast adsorption rate and superior reusability allowed the materials to be applied in the treatment of oily water.
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
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2019
·
IF 4.784
Xiujuan Zhao,Yangyang Luo,Peixin Tan,Mingxian Liu,Changren Zhou
A high-performance oil-water separation device that built by environment-friendly materials is a promising strategy to solve water pollution problem. In this study, we developed an oil-water separation system with chitin/halloysite nanotubes (C/HNTs) composites. C/HNTs were crosslinked by epichlorohydrin and freeze-dried, then a porous sponge was formed. The C/HNTs sponge was modified to be hydrophobic via immersing into bromohexadecane ethanol solution. The surface structure, mechanical properties, microstructure, oil absorption and oil-water separation ability of the C/HNTs sponge were investigated. The addition of HNTs significantly increased the compressive strength of chitin sponge without influence on porous structure . IR spectra indicated the successful coating of bromohexadecane on the C/HNTs sponge surface, which enabled the hydrophobicity and lipophilicity of this construct. The inside construct of the C/HNTs sponges were full of interconnected pores, and the pore size ranged from 250 to 500 μm. The absorption capability for various oil and grease were measured, including methylbenzene, sunflower seed oil , carbon dichloride, n-hexane, chloroform and acetone. It is found that the total amount of chloroform absorbed by a C/HNTs sponge was ~11.23 times of the sponge's weight, and the absorption for hexane was ~3.94 times of the sponge's weight. The sponge also exhibited an excellent oil-water separation ability with as high as 98.7% separation efficiency. All the results suggested that the chitin/HNTs sponges with improved mechanical property would have a great potential in oil-water separation.
研究领域:
材料科学
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环境工程
·
高分子化学
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纳米复合材料
·
分离技术
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yunzhenshan Gao,Hao Xing,Yifei Zhang
The accumulation of plastic waste poses a long-term threat to the environment, while oil pollution causes immediate and serious damage. In this study, we proposed a method to repurpose poly(ethylene terephthalate) (PET), one of the most abundant plastics, into an oil sorbent . By mixing and crosslinking with polyethylene glycol (PEG) using hexamethylene diisocyanate trimer (HDIT), the PET can be reformed as a porous sponge with high porosity and moderate mechanical strength. The sponge can absorb floating oil from water with a capacity of up to 22 g/g, demulsify O/W emulsions of different oil contents (1–4 %) with efficiencies of over 97 %, and have a high flux (∼726.7 L·m −2 ·h −1 ) under gravity. The sponge prepared with recycled PET materials shows identical mechanical properties and oil-water separation efficiencies. This work demonstrates a sustainable and promising approach to simultaneously managing plastic waste and addressing various oil pollutions, aligning also with the principles of a circular economy.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
ADSORPTION SCIENCE & TECHNOLOGY
·
2022
·
IF 4.373
Junjie Cheng,Jie Hu,Jiawei Wang,Zefei Huang,Baoqian Ye
As oil and chemical spills pose a significant threat to the water environment, the need to develop efficient sorbent materials to remove oil and organic pollutants from water has arisen. This study aimed to develop a simple modification scheme to impart oil and water selective absorption capacity to a common three-dimensional porous material. Commercially available polyurethane sponges were used as the base material, and vinyl silica aerogel particles were loaded onto the sponges using polydimethylsiloxane as an adhesion agent. As a result, the water contact angle of the modified sponge increased from 118° to 149.2°, and the water absorption decreased from 106.5 g/g to 0.2 g/g; it could absorb oil in oil-water mixtures without absorbing water and maintain an excellent level of selective absorption ability after 20 cycles. This modification scheme is easy to operate and robust and is a scheme of practical application.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Yanxiong Pan,Bingrui Li,Zhi Liu,Zhongyu Yang,Xu Yang,Kai Shi,Wei Li,Chao Peng,Weicai Wang,Xiangling Ji
Poly(N-isopropylacrylamide) (PNIPAAm), a typical thermoresponsive polymer, exhibits potential application in smart materials. However, bulk PNIPAAm hydrogel monoliths undergo slow volume phase transition at least tens of minutes to hours as determined by the shape and size of polymers due to the formation of the skin layer. In this regard, novel macroporous sponges with rapid thermoresponse are prepared via grafting polymerization of N-isopropylacrylamide (NIPAAm) onto the macroporous poly(vinyl alcohol) formaldehyde (PVF) network as confirmed by attenuated total reflection-infrared (ATR IR) and 1H NMR spectra. As prepared PVF-g-PNIPAAm sponges display interconnected open-cell structures, and their average pore sizes and porosities are ∼90 μm and >85%, respectively. The equilibrium swelling ratio of PVF-g-PNIPAAm sponges varies from 11 to 50 with temperature. The volume phase transition temperature is at 30–34 °C, as detected in the DSC curves of swollen samples. These features indicate that the existence of the original PVF network exerts almost no influence on the PNIPAAm temperature responsibility. As prepared samples can reach the swelling equilibrium in less than 80 s, and their rapid swelling kinetics can be fitted using the pseudo-first-order rate kinetic equation. Notably, the samples also display rapid deswelling rate in less than 40 s at relative high temperature (48 °C), thereby indicating a superfast responsive behavior to temperature change. The PVF-g-PNIPAAm sponges exhibit rapid and reversible thermoresponse in repeatable swelling–deswelling cycles, which can satisfy the need of special smart materials. In particular, combined with iodine solution (i.e., PVF-g-PNIPAAm/I2), these sponges can serve as a novel temperature indicator and exhibit excellent antibacterial performances.
研究领域:
材料科学
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高分子化学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yukai Chen,Yiyi Ji,Bin Liu,Dan Wang,Rulin Dong,Jiaojiao Fang,Baoying Dai
Fabricating built-in electric fields provides a practical solution for the separation of photogenerated electrons and holes, whose recombination usually restricts the elevation of photocatalytic performance. In this work, a flexible PbTiO 3 (PTO)-polyvinylidene fluoride (PVDF) inorganic-organic hybrid piezoelectric photocatalytic sponge with hierarchical pores and channels was prepared to realize efficient catalysis. This design utilizes light to excite electrons and holes and draws upon ultrasound to separate these carriers. Benefited from the synergism between light and ultrasound, more electrons and holes take part in chemical reaction and effective piezo-photocatalytic performance is realized. As the result, the piezo-photocatalytic performance of the PTO-PVDF sponge is 1.79 and 2.04 times that of its photocatalytic and piezocatalytic performance, respectively. Compared with the PTO-PVDF film, the performance is elevated by 2.67 times. In addition, the PTO-PVDF sponge displays high elasticity and low density, maintaining its shape after hundreds of compressing-relaxing cycles, making it potential for the applications such as low-intensity energy assisted photocatalysis. Through a facile preparation method, this design sheds light on the practical application of piezo-photocatalysis.
研究领域:
材料科学
·
物理化学
·
纳米能源
·
环境催化
·
功能材料
✓ 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）