COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Lianxia Jing,Pengyu Zhang,Yanming Chen,Yunling Gao,Junxian Yun
A superhydrophobic PDMS/DTMS-SiO 2 @PLA membrane with a porous layered three-dimensional rough structure was obtained by a simple phase separation method for the preparation of polylactic acid (PLA) membrane with the addition of a layer of functionalized DTMS-SiO 2 nanoparticles. SEM, EDS, XPS, TGA, and FTIR were used to characterize the surface morphology and chemical composition of the PDMS/DTMS-SiO 2 @PLA membrane. The static water contact angle of the modified membrane could reach 160.7°. The high hydrophobicity remained after 50 abrasion experiments, and the WCA was still greater than 150° after 4 hours of immersion in different pH solutions. For petroleum ether, n-hexane, n-heptane, and isooctane mixtures with water, the modified membrane exhibited excellent oil-water separation capabilities in separation flux and efficiency. Meanwhile, the modified membrane also has good resistance to contamination and self-cleaning ability. Due to the advantages of simple preparation, degradable materials, mechanical stability, chemical resistance, excellent oil-water separation capability, good anti-pollution, and self-cleaning ability, superhydrophobic PDMS/DTMS-SiO 2 @PLA membrane can be applied to practical oil-water separation.
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
ACS Applied Materials & Interfaces
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2020
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IF 8.758
Yaozhuo Su,Yongqing Zhao,Wenge Zheng,Hongwei Yu,Yinfeng Liu,Linqiong Xu
In this work, an eco-friendly superhydrophobic stereo-complex polylactic acid (Sc-PLA) membrane was fabricated by a facile non-solvent-induced phase separation (NIPS) method, followed by peeling off its skin layer. By adjusting the thickness and roughness, membranes with various multi-scale microstructures could be obtained due to the formation of stereo-complex crystals during the process of phase separation. The Sc-PLA membranes display a hydrophobic wetting property. Interestingly, when the skin layer of the membrane with a 600 μm thickness was peeled off, the water contact angle on the surface of the membrane significantly improved from 142 to 152°, and the membrane displayed superhydrophobic wetting properties, which may be owing to the improvement of roughness for the surface by enlarging the exposure opportunity of finger holes and microstructures. In addition, the Sc-PLA membrane with superhydrophobicity shows excellent antifouling performance and large oil absorption capacity. Predictably, the Sc-PLA membranes may have potential applications in antifouling and oil-water separation.
研究领域:
材料科学
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环境工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2019
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IF 5.107
Ailin Gao,Guangfa Zhang,Shuai Zhao,Jian Cui,Yehai Yan
Outstanding separation properties combining high water permeability and permselectivity have always been a pursuit for porous membranes, which were commonly determined by the membrane structure and surface properties. In this work, PLA membrane with unique nanoscale bicontinuous structure was fabricated by non-solvent induced phase separation (NIPS) process involving in situ crosslinking of glycidyl methacrylate (GMA) monomers in polylactic acid (PLA) casting solution. Afterwards, systematic approaches were carried out to characterize the regulating functions of the in situ formed polymerized GMA (PGMA) on the morphology, pore shape, pore size, porosity, wettability , water flux and solutes rejection of developed PLA membranes. With the addition of GMA monomers, novel bicontinuous interconnected PLA membranes with narrowly distributed nanoscale pores were obtained. These generated PLA membranes presented higher water flux and better selective rejection to various dextran molecular owing to their larger effective pore size and narrower pore size distribution . This study provides an innovative strategy to overcome the trade-off issue when membranes are used for water treatment.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
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2015
·Vol. 5
·期 130
·107949-107956
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IF 3.84
Xuemin Yu,Zhu Xiong,Jinglong Li,Ziyang Wu,Yunze Wang,Fu Liu
Poly(lactic acid) (PLA) has attracted growing attention as a sustainable and environmentally benign membrane material. The good biocompatibility/hemocompatibility is essential for hemodialysis membranes. To circumvent the inadequate hydrophilicity/biocompatibility/hemocompatibility, we have developed a feasible strategy that enables the persistent PEGylation on PLA membranes via micro-swelling and subsequent UV-initiated crosslinking of poly(ethylene glycol)diacrylate (PEGDA). The content of DMSO and PEGDA in the reaction solution was crucial to control the surface PEGylation kinetics. Besides, the influence of PEGylation on membrane chemistry, morphology, hydrophilicity, water flux and dynamic fouling resistance to BSA was investigated. It was demonstrated that the biocompatibility/hemocompatibility was significantly improved by the surface PEGylation in terms of reduced BSA adsorption, extended APTT and alleviative platelet adhesion.
研究领域:
材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
PROCESS BIOCHEMISTRY
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2023
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IF 4.4
Junyan Wang,Liang Liang,Wei Shang,Noor Huda Ismail,Raja Azman Awang
The main goal of periodontal therapy is to fully regenerate the bone that supports teeth while preventing non-osteogenic tissues from interfering with bone regeneration . There is no double-functional repair material in the existing treatment method. Hydroxyapatite (HAp) has been used as a bone substitute in biomedical applications. Polylactic acid (PLA) can effectively inhibit the growth of adherent cells and play a protective role as a barrier. It is possible to combine these two methods to prepare a guided regeneration membrane for guiding periodontal bone regeneration. In this study, HAp microtubules were prepared through hydrothermal synthesis , and bilayer films were prepared through self-evaporation with PLA. The HAp microtubules/PLA membrane had better tensile and breaking strengths and lower fracture productivity than the PLA membrane. The expansion rate reached 34% after 2 h, and the degradation rate exceeded 25% after 40 days. The results showed that the membrane composite had the clinically quoted mechanical requirements. The results of the cell experiments also showed that the membrane had no cytotoxicity. The HAp microtubule side can promote the expression of genes and proteins related to osteogenesis, while the PLA side can inhibit cell adhesion . The HAp microtubules/PLA membrane has stability and good mechanical properties. The double-layer structure has the function of a biological barrier and promotes bone formation.
研究领域:
牙科材料
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组织工程
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生物医学工程
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口腔生物学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
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2017
·Vol. 5
·期 14
·6538-6545
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IF 8.867
Zhu Xiong,Haibo Lin,Yun Zhong,Yan Qin,Tiantian Li,Fu Liu
To overcome the surface instability of traditional polymeric membranes especially with superwetting behaviour, a robust superhydrophilic surface was fabricated with nano-TiO2 inlaid on a hierarchical polylactide (PLA) ultrafiltration membrane via a spin coating process. Distinctly different from most previously reported nano-particle involved polymeric membranes, both the micro-/nano-architecture of the PLA membrane and the size matched nano-particle assembly constructed the robust superhydrophilic interface mimicking coral tentacle predatory behavior. The rigid surface based on the flexible polymeric membrane with the hierarchical architecture showed robust superhydrophilicity and underwater superoleophobicity even after long-term water washing treatment, which was also verified by the morphology, contact angle, XPS and adhesive force in contrast to smooth membranes. The as-prepared PLA membrane showed excellent separation performance for varieties of oil/water mixtures with a robustly high permeate flux (above 950 L m−2 h−1 under 0.1 MPa) and oil rejection (above 99%) even after 10 cycles of operation. Besides, the superhydrophilic PLA membrane exhibited outstanding anti-protein fouling properties. The PLA membrane showed relatively high BSA and ink rejection as well as water flux recovery and continuous separation stability due to rigid interface strengthening effects. The unique interface combination strategy between functional nanoparticles and polymeric membranes provided a window of opportunity for constructing robust polymeric membranes for advanced applications e.g. oil/water separation, ion exchange, in membrane catalytic reactors etc.
研究领域:
材料科学
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环境工程
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纳米技术
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膜技术
✓ 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）