COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Qingyuan Tian,Qinyong Liu,Jun Zhou,Peng Ju,Geoffrey I.N. Waterhouse,Shuang Zhou,Shiyun Ai
The demand for superhydrophobic sponges for fast oil-water separations is growing. Herein, a novel superhydrophobic sponge was developed using a facile and scalable synthetic procedure. Briefly, layered double hydroxide (LDH) sheets were first modified with polymethylhydrogen silicone oil (PMHS) to give superhydrophobic LDH sheets (SHP-LDH). Subsequently, the SHP-LDH sheets were immobilized at different loadings on a polyurethane sponge using a silane coupling agent (KH-550). A SHP-LDH-containing sponge (SHP-LDH loading of 25 wt.%) demonstrated outstanding oil-water separation performance, which can be attributed to its super-lipophilic character, high oil absorption capacity, good oil storage properties and ease-of-recovery following oil absorption. In addition, the superhydrophobic sponge also displayed excellent flame retardancy. On account of the low cost and readily available of the raw materials used in its fabrication, the simplicity of its fabrication and outstanding performance, the superhydrophobic sponge is expected to find widespread use in oil-water separations and other applications.
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
JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Cai Ling,Dai Yimin,Fang Chengqian,Wang Zhiheng,Li Yaqi,Yang Siwen,Wang Junlong,Liu Bo,Ding Xianglong,Zhang Yue-Fei,Li Yan,Wan Li
Intelligent oil–water separation materials with stimulating response have received extensive attention. In this paper, a novel, cost-effective, and simple approach is developed to produce a photothermal-responsive smart sponge with switchable wettability. The polydopamine (PDA) and photothermal agent copper sulfide (CuS) were grafted PU sponge surface. Thermal-responsive polymers P(VTMS-co-NIPAm) and 1-octadecanethiol (ODT) are then decorated on the PDA/CuS@PU surface through free radical polymerization and Michael addition reaction. The obtained PCPO@PU exhibits rapidly switchable wettability between hydrophobicity and hydrophilicity depending on the temperature response of P(VTMS-co-NIPAm) induced by photothermal effect of CuS. The PCPO@PU showed excellent separation performance with oil absorption ratio 8–33 g·g −1 and average self-desorption efficiency of more than 70%, but also has a remarkable recycling effect. Specifically, the photothermal response of PCPO@PU does not require additional chemical initiation and both address the limitations of materials that respond to specific light species and heat. More importantly, the PCPO@PU is able to realize the fluorescent lamp-peristaltic pump model, which can be a significant step toward its widespread application for oil–water separation in nature marine environment.
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
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Yong Yang,Zhiguang Guo,Weimin Liu
Frequent oil spills have significant implications for the preservation of ecological balance. However, conventional superhydrophobic materials are limited to organic solvent separation, lacking the ability to undergo thermal conversion. In response to these challenges, photothermal materials have emerged as a promising, environmentally friendly, and cost-effective solution. These materials utilize solar energy as a constant power source to effectively reduce the viscosity of crude oil without the need for additional energy input. This work presents the self-assembly of titanium nitride/polydopamine (TiN/PDA) nanoparticles using hydrolytic methyltrimethoxysilane (MTMS) on the polyurethane (PU) sponge and subsequently dip-coats this sponge with polydimethylsiloxane (PDMS). The TiN nanoparticles act as a photothermal medium, while the PDA coating exhibits a photothermal synergistic effect on TiN nanoparticles. Additionally, the PDA coating demonstrates strong adhesion on the PU sponge through chemical bonding with MTMS, as confirmed by density functional theory (DFT). Furthermore, the superhydrophobic sponges process exceptional mechanical or chemical stability in harsh environments, thanks to the dual protective mechanisms provided by MTMS and PDMS. Particularly important, the excellent photothermal conversion efficiency of this material results in a maximum temperature of 99.4 °C being achieved within 3 min and a stable heating performance of over 99.0 °C across 10 cycles under a standard sunlight intensity. These superhydrophobic sponges can be effectively utilized for continuous vacuum-assisted separation of crude oil/seawater, enabling rapid adsorption and purification in oceanic environments.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Lin Zhang,Hongqiang Li,Xuejun Lai,Xiaojing Su,Tao Liang,Xingrong Zeng
With the environmental pollution deteriorating, oil-water separation has attracted much attention in recent years. In this work, a facile method is proposed to fabricate superhydrophobic polyurethane sponge for oil-water separation via a simple dipping-drying process. It is based on the utilization of hydrophobic thiolated graphene (GSH) with the water contact angle (WCA) of 128° from graphene oxide through thiolation reaction. The WCAs of the as-prepared sponges were largely determined by the loading of GSH, and the WCAs reached 157.0° and 160.5° with GSH loadings at 5.0% and 7.5%, respectively. The GSH-based superhydrophobic sponge exhibited high absorption selectivity for different organic solvents and oils, the absorption capacity for chloroform attained 90 times and there was no decrease after 10 absorption cycles. Importantly, with the oil-water separation device composed of pump, rubber tubes and GSH-based sponge, the separation efficiency of toluene from water reached 99.7%, and still maintained 99.5% after 5 cycles. Additionally, GSH-based sponge also effectively shortened burning time and reduced black smoke in the combustion process, demonstrating good flame retardancy. Our findings provided a new strategy to fabricate superhydrophobic materials for oil-water separation, showing the great potential in large-scale practical application.
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
Biomaterials Advances
·
2024
·
IF 5.5
Dandan Hou,Yansen Wang,Liya Qi,Chunyao Wang,Jingqian Deng,Xiaohuan Zhao,Xue Geng,Qiang Sun,Lin Ye,Zifang Guo
Uncontrolled bleeding and excessive blood loss stand as the leading causes of death in complex surgeries, civilian traumas, and military operations. Sponges have been used for developing efficiency hemostats, but most commonly used hemostatic sponges possess only one single coagulation mechanism or lack inherent blood clotting ability. Herein, we proposed simple yet innovative approaches for creating novel hemostatic composite sponges with dual hemostatic effects. Bacterial cellulose (BC) was first introduced into polyvinyl alcohol (PVA) matrix to develop a BC/PVA (CP) sponge featuring a unique cellulose-embedded porous network structure and desirable properties. Subsequently, thrombin was immobilized on CP through an easy method that combines physical adsorption and covalent binding to fabricate thrombin-carrying CP (TCP) composite sponges. The resulting composites boasted a highly porous structure, outstanding liquid-absorption capacity, low hemolysis rate, and superior biocompatibility. In vitro clotting tests revealed that TCP displayed potent coagulation capabilities, a rapid blood absorption rate, and the ability to stimulate and activate blood components along with the coagulation cascade. In vivo hemostatic assessments further confirmed that TCP offered high hemostatic efficiency and multifaceted hemostatic effects, making it suitable for the management of acute and severe bleeding.
研究领域:
生物材料学
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医学工程
·
止血材料研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2021
·
IF 8.528
Huanyu Chen,Gaohui Sun,Zailin Yang,Ting Wang,Guofeng Bai,Jun Wang,Rongrong Chen,Shihui Han
For the advantages of light weight, rapid recovery, and high sensitivity, the conductive flexible composite sponges with idiographic spatial structure as a stress sensor has received great attention. However, for small pressure and deformation, it is still challenging to achieve high sensitivity and response. Here, the polyimide (PI) sponge with through-hole structure and special functional groups is successfully fabricated through a clever structural design and is used as substrate of the composite sponges. The new PI sponge effectively induces the fabrication of reduced graphene oxide (RGO) sponge that possessing a pleated stacked structure in the cells only by a hydrothermal route. By controlling the GO dispersion concentration, the maximum electrical conductivity of the composite sponges reaches to 10.68 × 10 −4 S/m. The maximum sensitivity of composite sponges arrives at 1.172 kPa −1 and possesses a wide response range from 0 to 1 kPa. Comparing with previous similar works, the maximum sensitivity is improved by 74.9–1231.8%. Meanwhile, composite sponges exhibit excellent cycling stability under different compression rates, and present obvious response to tiny stress or deformation which is as low as 0.09 N and 0.45%. This is of great significance for the application of the conductive composite sponges sensor in tiny stress.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Changyuan Song,Yin Jin,Xiangyi Gu,Jianwei Shi
Solar-heated absorption has become an effective technique to handle the crisis of crude oil spill. Although photothermal absorbents could efficiently clean up crude oil in situ, oil recovery methods such as squeezing absorbents have a negative impact on structural integrity and performance of absorbents, shortening the service life of the device. Herein, a solar-driven carbon-doped self-repairing polyurethane sponge (CSPU) is fabricated for absorption and recovery of crude oil. Chitosan-derived N-doped porous carbon (NPC) as photothermal filler and 2-hydroxyethyl disulfide (HDES) as chain extender are introduced into sponge in situ through free foaming. The firm load of NPC endows CSPU with good light absorption of 97.1% and a stable photothermal conversion performance. Additionally, the solar-driven self-repairing property promotes CSPU to timely repair the structural damage caused in oil recovery process. Consequently, CSPU exhibits a high crude oil absorption of 23.5 g/g, and it still maintains a good oil absorption and recovery efficiency after friction, ultrasonic treatment or multiple absorption-recovery cycles. This strategy combining photothermal oil absorption and solar-driven self-repairing provides a sustainable and durable solution for addressing crude oil spills.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xuanwei Chang,Xinru Gao,Xiufang Wen,Pihui Pi,Jiang Cheng,Shouping Xu
The advancement of sustainable solar-driven interfacial evaporation systems for seawater desalination continues to be hindered by intrinsic trade-offs among rapid water transport, effective salt rejection, and mechanical robustness in conventional photothermal materials. In this study, a hierarchically porous poly(vinyl alcohol)-propionaldehyde-glutaraldehyde sponge (PVPG) was synthesized via a mixed-acetal reaction. The three-dimensionally interconnected hierarchical pore network significantly enhanced capillary-driven water transport. The PVPG/CB/CMC sponge (PCB) was fabricated by integrating hydrophobic carbon black (CB) and hydrophilic sodium carboxymethyl cellulose (CMC) into the PVPG sponge. The hydrophobic-hydrophilic synergy between CB and CMC optimized water state and reduced the evaporation enthalpy of water. This enabled the evaporator to achieve an impressive evaporation rate of 3.56 kg m −2 h −1 under 1 sun irradiation. Simultaneously, spontaneous salt crystallization inhibition through the Donnan effect ensured that the system maintained a long-term evaporation rate of 3.08 kg m −2 h −1 even in 20 wt% high-salinity brine. Importantly, covalent crosslinking between CMC and the sponge matrix endowed the composite with exceptional mechanical durability, preserving structural integrity after 100 compression cycles, thereby addressing the brittleness limitation commonly observed in polyelectrolyte-based evaporators. This innovative architecture establishes a new framework for designing robust solar evaporators that integrate high efficiency, salt resistance, and structural stability, providing a practical solution for applications in challenging marine environments.
研究领域:
材料科学
·
化学工程
·
环境科学
·
能源技术
·
高分子科学
·
海水淡化技术
✓ 已验证
产品关联
DOI
高影响因子
Jove-Journal of Visualized Experiments
·
2021
·
IF 1.355
Zitaiyu Li,Yinghao Yin,Kancheng He,Kun Ye,Jun Zhou,Hao Qi,Yihong Zhou,Yingbo Dai,Yuxin Tang
The bilateral cavernous nerve (CN) injury rat model has been extensively used to simulate clinical cavernous nerve injury associated with erectile dysfunction (ED) for evaluating the effect of clinical therapeutic methods. However, the methods of CN injury model construction are flawed and varied in the ED research field. It is CN crush injury that is the most commonly used method in recent years. This study aims to provide a detailed description of the procedure of bilateral CN injury rat model construction and measurement of intracavernous pressure (ICP) recording, providing a reliable and reproducible CN injury rat model. This work successfully developed the CN injury method of hemostat crush injury using a syringe needle as hard support and a hemostat with a rubber sleeve. Also, this method concludes that a voltage of 1.0 V, frequency of 20 Hz, and pulse-width of 5 ms are the optimized stimulation parameters for ICP recording in a bilateral CN injury rat model.
研究领域:
泌尿学
·
神经科学
·
生理学
✓ 已验证
DOI
PubMed
高影响因子
ACS Nano
·
2023
·
IF 17.1
Dingding Zong,Wenya Bai,Meng Geng,Xia Yin,Fei Wang,Jianyong Yu,Shichao Zhang,Bin Ding
Noise pollution, as one of the three major pollutants in the world, has become a great burden on people’s health and the global economy. Most present noise absorbers suffer large weight and inevitable compromise between good low-frequency (usually <1000 Hz) and high-frequency (typically >1000 Hz) noise reduction performance. This study presents a scalable strategy to directly synthesize ultrafine fiber sponges with ultrathin graphene-based vibrators by the synchronous occurrence of humidity-assisted electrospinning and electrospraying. The unique physical entanglements between reduced graphene oxide (rGO) nanosheets and ultrafine fibers endow hierarchical vibration structured fiber sponges (VSFSs) with excellent mechanical properties, which could withstand large shear strain (60%) and tensile stress (6000 times its weight) without damage and almost have no plastic deformation after 1000 compressions. Attribute to the vibration effect of ultrathin graphene-based vibrators and the viscous friction effect of porous fiber networks, the VSFSs achieve both good low-frequency (absorption coefficient of 0.98 in 680 Hz) and high-frequency sound absorption (absorption coefficients above 0.8 in 2000–6300 Hz) simultaneously. Furthermore, the noise reduction coefficient (NRC) of lightweight VSFSs (thickness of 30 mm) reaches 0.63, which could reduce high decibel noise by 24.4 dB, providing potential solutions for developing ideal noise-absorbing materials.
研究领域:
材料科学
·
环境工程
·
声学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2021
·Vol. 9
·期 41
·8676-8685
·
IF 6.331
Shengping Yao,Junhao Shen,Yixin Guo,Shaohua Zuo,Fuwen Shi,Jinchun Jiang,Junhao Chu
Piezoresistive pressure sensors based on flexible, ultrasensitive, and squeezable conductive sponges have recently attracted significant attention. However, the preparation of cost-effective conductive sponges with good stability and wide strain range for pressure sensing remains a challenge. Herein, a conductive poly(vinyl alcohol)/phosphoric acid gel electrolyte@polydimethylsiloxane (PVA/H3PO4@PDMS) composite was fabricated by impregnating a PDMS sponge into a PVA/H3PO4 gel electrolyte. The conductivity of the as-prepared sponges was determined using a gel electrolyte polymer film. The sponge exhibited good sensitivity of 0.1145 kPa−1 in the low-pressure range (0–6.5 kPa), short response time (70 ms), and durability for over 2700 s (6000 cycles). The gauge factor of the PVA/H3PO4@PDMS sponge was 5.51, 1.49, and 0.33 at the strain range of 0–10%, 10–30%, and 30–80%, respectively. Based on these outstanding sensing performances, the sponges were applied for the detection of various human motions, such as vocal cord vibration, joint bending, respiratory rate, and pulse signal detection. Further, the sponge demonstrated their great potential in the fabrication of electronic skin and high-performance flexible wearable electronics. Therefore, the obtained PVA/H3PO4 gel electrolyte used as a sponge conductive coating material is a readily available and inexpensive material that can reduce the cost of composite materials for pressure sensing.
研究领域:
材料科学
·
传感器技术
·
柔性电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOMATERIALS
·
2017
·
IF 8.402
Qiu Li,Yiming Niu,Huajia Diao,Lintao Wang,Xiuping Chen,Yitao Wang,Lei Dong,Chunming Wang
Recapitulating the typical features of extracellular matrix (ECM) in engineered biomaterials is crucial for preparing a suitable niche to activate endogenous tissue repair. Here, we report the design and evaluation of an ECM-mimetic scaffold that successfully accelerated wound healing through enriching endogenous platelet-derived growth factor-BB (PDGF-BB). Specifically, we prepared a electrospun hydrogel sponge (EGS) comprising a PDGF-BB-binding polysaccharide (EUP3) and gelatin. The two polymers in concert exerted a ‘retention-and-release’ function: upon the application of EGS in vivo , EUP3 started to bind and sequester endogenous PDGF-BB at the wound site; gradually, gelatin was degraded to free the PDGF-BB/EUP3 complex that acted on the cells in situ . Our serial in vitro and in vivo tests validated the efficacy of EGS in retaining PDGF-BB, releasing PDGF-BB/EUP3 in response to collagenase, and promoting various PDGF-BB-mediated regenerative activities. Particularly, EGS accelerated the repair of a full-thickness skin wound in mice and induced optimal neo-tissue formation, without the addition of any exogenous GFs, cells or genes. Collectively, our results suggest that, by mimicking the distinctive GF-affinitive feature of ECM, EGS as an engineered biomaterial can effectively harness the endogenous regenerative power of the native tissue. Our investigation may inspire the design of new, effective and safer approaches for tissue regeneration.
研究领域:
生物医学工程
·
组织工程
·
再生医学
·
伤口愈合
✓ 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）