Materials
·
2021
·Vol. 15
·期 1
·115
·
IF 3.623
Jiaqi Wang,Zhenzhong Fan,Qingwang Liu,Qilei Tong,Biao Wang
The discharge of oily wastewater and oil spills at sea are the current difficulties in water pollution control. This problem often leads to terrible disasters. Therefore, the effective realization of oil-water separation is a very challenging problem. Superhydrophobic sponge is a promising oil-absorbing material. In this article, we reported a superhydrophobic sponge with nano-Fe3O4for oil-water separation. The addition of nano-Fe3O4allows the sponge to be recycled under the action of magnetic force. The sponge has the advantages of low cost, simple preparation and efficient oil-water separation. This kind of sponge is very worthy of promotion for the treatment of oily wastewater and marine oil spill accidents.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Lei Zhu,Hongye Lu,Tianci Huo,Dongxiao Liu,Zechen Yan,Jianqiang Zhang
The frequent oil leakage accidents cause huge loss of natural resources and serious damage to the ecosystem. Although all kinds of modified sponges have been invented to deal with the offshore oil spills, it is difficult to separate high viscosity crude oil and water-in-oil emulsions. To address these challenges, a modified polyurethane (PU) sponge (PDMS/MOF-74@PU) coated by polydimethylsiloxane (PDMS) with ultra-low surface energy after growing spindle-shaped metal–organic framework structure (MOF-74) on the PU sponge surface was prepared. With the advantages of super-hydrophobic and high porosity, the prepared sponge can selectively and effectively absorb various oils from oil/water mixtures and it has good oil adsorption capacity (18–55 g/g). Meanwhile, the black MOF-74 endows the PDMS/MOF-74@PU photothermal properties for the separation of high viscosity crude oil under the light conditions. As well as, the prepared sponge shows excellent separation performance for the water-in-oil emulsions, the amount of water in the oil could reduce to less than 20 ppm and the separation efficiency could reach as high as 99.9 % after separation. In addition, we used molecular dynamics to verify the mechanism by which PDMS coatings change the surface wettability of materials. With the excellent mechanical property, chemical stability, and thermal stability in various harsh environments, the PDMS/MOF-74@PU have a broad application prospect in the treatment of offshore oil spills.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2011
·
IF 2.78
Zhiyun Zhang,Jianchun Wang,Qin Tu,Nan Nie,Jun Sha,Wenming Liu,Rui Liu,Yanrong Zhang,Jinyi Wang
The current paper reports the synthesis of a highly hydrophilic, antifouling dendronized poly(3,4,5-tris(2-(2-(2-hydroxylethoxy)ethoxy)ethoxy)benzyl methacrylate) (PolyPEG) brush using surface initiated atom transfer radical polymerization (SI-ATRP) on PDMS substrates. The PDMS substrates were first oxidized in H 2 SO 4 /H 2 O 2 solution to transform the Si–CH 3 groups on their surfaces into Si–OH groups. Subsequently, a surface initiator for ATRP was immobilized onto the PDMS surface, and PolyPEG was finally grafted onto the PDMS surface via copper-mediated ATRP. Various characterization techniques, including contact angle measurements, attenuated total reflection infrared spectroscopy, and X-ray photoelectron spectroscopy, were used to ascertain the successful grafting of the PolyPEG brush onto the PDMS surface. Furthermore, the wettability and stability of the PDMS–PolyPEG surface were examined by contact angle measurements. Anti-adhesion properties were investigated via protein adsorption, as well as bacterial and cell adhesion studies. The results suggest that the PDMS–PolyPEG surface exhibited durable wettability and stability, as well as significantly anti-adhesion properties, compared with native PDMS surfaces. Additionally, our results present possible uses for the PDMS–PolyPEG surface as adhesion barriers and anti-fouling or functional surfaces in biomedical applications.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2025
·
IF 4.9
Wei Chen,Sheng-Zhe Zhao,Guo-Tao Xiang,Ran Lu,Jia-Lei Xu,Raul D. Rodriguez,Evgeniya Sheremet,Yong-Da Hu,Jin-Ju Chen
Developing high-power output, flexible, and wearable electronics is a significant challenge to materials science. We address this issue by creating a hybrid piezo-triboelectric nanogenerator (PTNG) based on a unique combination of porous ZnO, silver nanowires (AgNWs), and polydimethylsiloxane (PDMS). Our PTNG utilizes porous ZnO, which exhibits a significantly higher piezoelectric coefficient than its non-porous counterpart due to its increased surface area and enhanced atomic polarization. This unique combination of porous ZnO, AgNWs, and PDMS creates a synergistic effect, enhancing both piezoelectric and triboelectric outputs beyond what each material could achieve alone. For instance, our device generates an open-circuit voltage of 146 V and a short-circuit current of 1.1 µA under a pressure of 12.5 kPa and can track human motion while generating 60 V during regular walking. Deformation tests show excellent performance with prolonged use for up to two months. This robust, flexible, and highly sensitive PTNG opens opportunities for next-generation self-powered wearable sensors and energy harvesting applications in healthcare, fitness, and other emerging technologies, particularly those already using PDMS as a base material.
研究领域:
材料科学
·
纳米技术
·
电子工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Siyu Pang,Zhihao Si,Yan Zhuang,Hanzhu Wu,Jan Baeyens,Xinmiao Zhang,Peiyong Qin
Polydimethylsiloxane (PDMS) is the benchmark pervaporation (PV) material, and its hollow fiber (HF) membrane is generally fabricated by thermal curing, which is energy-intensive and hard to be controlled. For the first time, a continuous and controllable photo-curing system for the fabrication of hydrophobic PDMS HF membrane is proposed. In this process, the uncoated PVDF HF membrane firstly exits from the feed roll, and enters into the tank filled with photo-cured PDMS solution. After being coated by PDMS, the new liquid layer uninterruptedly enters into the UV irradiation module and realizes the photo-curing reaction. Finally, the cured PDMS HF membrane moves into the take-up roll for collection. Due to this technology firstly being assessed, a series of operation parameters are optimized, including 126, 507 g mol −1 of the PDMS molecular weight, 12 wt% of PDMS concentration in its coating solution, 20.1 mW cm −2 of the irradiation intensity, 0.86 m min −1 of the rotation speed of roll and 1 time of the number of dip-coating. Under these parameters, the prepared PDMS HF membrane achieves an outstanding separation factor of 18.2 with a total flux of 1821 g m −2 h −1 for PV separation of 1-butanol. Our study has proven the feasibility of photo-cured fabrication of PDMS HF membranes for 1-butanol pervaporation.
研究领域:
材料科学
·
化学工程
·
分离技术
✓ 已验证
DOI
高影响因子
Advanced Membranes
·
2025
·
IF 9.5
Zhibin Ma,Peitong Lian,Jie Li,Yanxiong Ren,Yonghui Shi,Hanze Ma,Yuhang Guo,Qianfeng Pan,Sheng Yuan,Yutong Wang,Heyang Liu,Lixuan Liu,Yuao Dong,Yanlei Su,Jing Zhao,Quanfu An,Guangwei He,Zhongyi Jiang
Polydimethylsiloxane (PDMS) membranes are commonly utilized for ethanol-water separation. However, the separation performance is insufficient owing to the inherent trade-off between permeability and selectivity. In this study, we reported the incorporation of methyl-functionalized covalent organic framework (COF, TpBD-CH 3 ) into PDMS membranes to prepare mixed matrix membranes (MMMs), greatly increasing ethanol flux by 2.7 times. Under testing conditions of 60 °C with a feed solution containing 5 wt% ethanol in water, the permeation flux of the membrane incorporating 0.1 wt% TpBD-CH 3 significantly increased from 1738 g/(m 2 ·h) to 4648 g/(m 2 ·h) compared to the original PDMS membrane, while the separation factor improved from 7.32 to 8.40. The improved separation performance is attributed to that the incorporation of the COF enhances the hydrophobicity as well as the free volume cavities of the membranes as evidenced by the significantly increased gas permeability (CO 2 permeability reaches 26720 Barrer). This study indicates the potential of COF in the development of PDMS-based MMMs for the separation of organic aqueous solutions or gas components.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Wei Yang,Hao Cui,Mi Wang,Xiaohui Weng,Guolong Lu,Zhiyong Chang,Youhong Sun
Methane detection is crucial in identifying combustible ice within the energy sector. The gas–liquid separation membrane, a key component of methane sensors, plays a critical role in effectively separating methane and water. It significantly enhances the efficiency and stability of detecting methane concentration in situ. However, the related permeability and mechanical property present conflicting requirements in order to achieve optimal membrane performance. This work proposes an investigation into the mass transfer performance of a high-strength composite membrane, utilizing PDMS as the functional layer and porous ceramics as the supporting layer. By adjusting the pore distribution of the porous ceramics, particularly through the use of spherical graphite as a porogen, the study examines the impact of spherical graphite (SG) on the support layer’s morphology and its ability to regulate pore structure. Results indicate that incorporating spherical graphite with a porogen content of 10 wt% and a particle size of 25 μm enhances connections between ceramic grains, resulting in a flexural strength of 56.36 MPa and a permeability coefficient of 1861.57 barrer. This configuration demonstrates good waterproof and breathable performance. Overall, this research presents a novel approach for fabricating methane-water separation membranes, offering valuable insights for underwater methane detection efforts.
研究领域:
材料科学
·
能源工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2016
·
IF 2.632
Jiahui Su,Xiaoxuan Liu,Chengjing Xiong,Hong Huang,Yanyan Cui
In this study, we prepared a novel triblock copolymer, PDMS- b -(PMAEBB- co -PDMAEMA) 2 ( tri -PI) bearing side-chain benzophenone (BP) and coinitiator amine, as a macro-photoinitiator via reversible addition-fragmentation chain transfer (RAFT) copolymerization of the polymerizable photoinitiator 2-(methacryloyloxy)ethyl-2-benzoylbenzoate (MAEBB) and the unsaturated coinitiator amine 2-(dimethylamino)ethyl methacrylate (DMAEMA) with a bifunctional polydimethylsiloxane (PDMS) macro-chain transfer agent (macro-CTA). The structure of synthesized copolymer was confirmed by Fourier-transform infrared spectroscopy (FT-IR), proton nuclear magnetic resonance ( 1 H NMR), differential scanning calorimetry (DSC), and gel permeation chromatography (GPC). The effects of the photoinitiator/coinitiator ratio, concentration, and photoinitiator systems on the photopolymerization kinetics of tri(propylene glycol) diacrylate (TPGDA) were investigated by real-time FT-IR. The mobility of the tri -PI chain segments was proven by X-ray photoelectron spectroscopy (XPS), and the surface morphology of TPGDA curing coatings was studied by scanning electron microscopy (SEM). Results showed that tri-PI strongly suppressed the effect of oxygen inhibition on the photopolymerization system. Tri-PI was also used in the curing of UV-curable waterborne polyurethane acrylate (UV-WPUA) resin to determine its versatility.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
Hui Liu,Xueyi Hou,Yubin Sun,Xiangyu Zhang,Heping Li,Yanyue Lu,Zeguang Zhou
Membrane distillation technology is an important method for desalination, but it is susceptible to membrane contamination and wetting. In this study, PVDF membrane bottom surface was protected with polydimethylsiloxane (PDMS)-modified nonwoven fabric, and the membrane surface was hydrophilically modified with polymers formed from 1-vinyl-2-pyrrolidone (NVP) and vinyltriethoxysilane (VTES) to prepare the Janus membrane with hydrophilic and hydrophobic surfaces. By peeling off the PDMS-coated nonwoven fabric, part of the PDMS chains were transferred to the bottom surface of the PVDF membrane, which significantly improved the hydrophobicity of the bottom surface, and the hydrophobic contact angle of the membrane reached 152.0°. Since the casting liquid was put into a solidification bath containing hydrophilic modifier for simultaneous phase conversion into film and hydrophilic modification, the PVP-VTES was firmly anchored to the surface of the PVDF membrane through silane coupling, which resulted in excellent superhydrophilic stability of the membrane surface, and the hydrophilic contact angle reached 0°. Finally, the Janus membrane showed excellent performance in the separation of brine in DCMD. The membrane could reach a maximum flux of 43.0 kg·m −2 ·h −1 and a salt rejection rate of 99.9 % in the separation of 3.5 wt% NaCl solution. In the separation of complex salt solution, after three cycles of experiments, the salt rejection effect remained unchanged while the flux was still stable and maintained at 31.2 kg·m −2 ·h −1 . In the separation of 15 wt% NaCl solution, the membrane flux was maintained at 22.9 kg·m −2 ·h −1 after three cycles of experiment, and the salt rejection rate was still at 99.9 %. Therefore, this Janus membrane has high permeated flux and better anti-fouling properties, and it is an effective material for treating complex salt and high salinity wastewater.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Membranes
·
2021
·
IF 0
Ao-Shuai Zhang,Shen-Hui Li,Heng Mao,Li-Hao Xu,Ming-Yu Lv,Zhi-Ping Zhao
Organophilic pervaporation (PV) mixed matrix membranes (MMMs) possess huge potential in organic wastewater treatment with merits of environmentally friendly and high-efficiency. The filler dispersion structure inside MMMs is required to explore in depth to upgrade the PV performance. In this study, an ethoxysilyl functionalized ionic liquid (IL-PTES) modified ZIF-8 nanoparticles (IL-PTES@ZIF-8) were synthesized by one-pot method, and then incorporated into the PDMS matrix to prepare MMMs for PV separation of ethyl acetate (EtOAc) from its diluted aqueous solution. The preferential adsorption performances to EtOAc by IL-PTES, especially for the functions of specific chemical groups in IL-PTES, were researched via molecular dynamicssimulation approach. Furthermore, the IL-PTES covered on ZIF-8 surface could crosslink with PDMS chains, thereby enhancing the interfacial compatibility between ZIF-8 and PDMS. Importantly, the self-aggregated IL-PTES subtly “glued” the nanoparticles together to lead IL-PTES@ZIF-8 a relatively continuous and defect-free distribution state. This condition would lead to a high-efficiency molecular pathway with less polymer phase and much relatively continuous ZIF-8 phase with high selectivity. PV results suggested that the MMMs with 15% IL-PTES@ZIF-8 loading displayed an optimal separation performance with an ultra-high separation factor of 492 (158.7% more than that of pristine PDMS membrane) and normalized EtOAc flux of 4.98 kg μm m −2 ·h −1 (2 times as much as that of pristine PDMS membrane) for separating 1 wt% EtOAc aqueous solution at 30 °C. These findings offered significant advancement toward developing high-performance MMMs enabled by the synergy of MOFs and ionic liquid.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
·
2019
·
IF 4.346
Ying-Song Yu,Xianfu Huang,Li Sun,Jin-Zhi Zhou,An Zhou
We report evaporation of ethanol/water mixture droplets on both pillar-arrayed and micro-holed polydimethylsiloxane (PDMS) surfaces. Analysis of wettability shows that (i) when the pillar-to-pillar spacing is 5 μm, the pillar-arrayed PDMS surfaces are Cassie-Baxter-wetted; (ii) when the pillar-to-pillar spacing is 20 or 50 μm, part of each pillar-arrayed surface is Cassie-Baxter-wetted while the other part Wenzel-wetted; (iii) all micro-holed PDMS surfaces are Cassie-Baxter-wetted; (iv) the advancing and receding contact angles increase with the increase of the pillar-to-pillar spacing, while they decrease with the increase of the hole-to-hole spacing. The investigation on evaporation of mixture droplets demonstrates that (i) evaporation on pillar-arrayed PDMS first proceeds with constant contact radius mode (CCR) due to the strong adhesion between the surface and the droplet; (ii) on micro-holed surfaces CCR stage is also observed for the surface with the hole-to-hole spacing of 5 μm, while it is not found at high ethanol concentration for surfaces with the hole-to-hole spacings of 20 μm and 50 μm, which is attributed to the weak adhesion between the micro-holed surfaces and the droplet. Finally, the evolution of droplet volume and its two-third power are discussed.
研究领域:
胶体与界面科学
·
微纳流体力学
·
表面工程
·
物理化学
·
材料科学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 37
·17958-17966
·
IF 3.925
Feng Chen,Shiming Wu,Jingjing Fu,Xiaohui Lv,Huihui Chai,Lixia Gao,Ling Yu
Polydimethylsiloxane (PDMS) gained its fame in the construction of microdevices for studying cell growth and cell–cell interaction and the assembly of organ-on-chip models because of its excellence in optical transparency, gas permeability, nontoxicity, elasticity, and well-developed soft lithography approaches. Yet, poor cell adhesion and growth on pristine PDMS drives the need to improve its cell compatibility. Herein, rough PDMS surfaces with microcavity structures were fabricated by one-step replication from a sandpaper template. The impact of physical topologies, such as microcavity size, density, and distribution, on cell anchoring and growth was systematically studied. Results show that sandpaper-templated, rougher PDMS can support significantly more cell growth than pristine, smooth PDMS. Most of the cells (80.27%) were observed at the microcavities replicated from sandpaper, suggesting the microstructure-trapped cells have increased chance of cell anchoring and growth. Moreover, the efficacy of the physical topology–enhanced cell compatibility was compared side-by-side with PDMS chemically functionalized with tannic acid (TA). The cell adhesion, growth, and apoptosis studies proved that sandpaper-templated PDMS has comparable efficacy to TA-functionalized smooth PDMS; both improved cell proliferation by ∼50% and reduced cell apoptosis. We also found that TA functionalization of the sandpaper-templated PDMS did not significantly improve the cell compatibility, suggesting that the simple one-step replication from sandpaper is a low-cost and effective way to prepare a PDMS surface for cell growth. Finally, the potential of sandpaper templating in building microdevices for cell culture is highlighted by assembling PDMS microchannels with rough surfaces for on-chip cell culture.
研究领域:
生物工程
·
细胞生物学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）