JOURNAL OF MEMBRANE SCIENCE
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2019
·
IF 7.015
Shuhao Wang,Kaifeng Gu,Jian Wang,Yong Zhou,Congjie Gao
Preparation of novel swelling resistance membrane by interpenetrating an immiscible flexible polyisobutylene (PIB) polymer into a rigid polyamide (PA) network by interfacial polymerization. Due to the force interlocking of flexible PIB, polyamide network has high strength and excellent resistance to methanol. The PA layer was characterized by mechanical strength , attenuated total reflection fourier transforms infrared spectroscopy (ATR-FTIR), small angle X-ray scattering (SAXS), contact angle, field emission scanning electron microscope (FE-SEM) and atomic force microscope (AFM). RO membrane performances were evaluated based on small molecule alcohol (methanol and ethanol) solution of Safranin O. The results show that the flexible PIB interpenetrates well in the rigid polyamide network and improves mechanical strength and swelling resistance. With an increasing concentration of PIB from 0% to 0.30% in the organic phase during the fabrication, the mechanical strength of the PA layer becomes 2.8 times that of the original, and the rejection of Safranin O increased from 95.43% to 99.43%, and the permeability coefficient ( B s ) decreased from 5.22 to 0.47.
研究领域:
材料科学
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化学工程
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膜技术
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产品关联
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2019
·
IF 3.517
Tao Cai,Dan Liu,Lina Zhao,Mengting Ye,Shenggao Liu
Herein, a zero-phosphorus and sulfur polymer-derived molybdenum-based compound (PIB Mo) was synthesized and corresponding researches on synergistic or antagonistic effects between the PIB-Mo and sulfur-containing species as well as arylamine derivatives are reported. The in situ sulfurization of PIB-Mo leads to the tribochemical formation of MoS 2 tribo-film as verified using EDS, Raman spectra and XPS , which is continuously formed and oxidized acting as a sacrificial layer, thus contributing an excellent friction and wear performance. Other antagonistic and synergistic effects are observed. The anti-oxidation property of ZDDP is weaken in the presence of PIB-Mo with the increase contents, however, a significantly synergistic effect of PIB-Mo and arylamine derivatives obtained, which dominate the anti-oxidation property and boost the anti-oxidation property in formation application.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
Qiuyun Fu,Wei Ding,Ruofan Liu,Yushun Jin,Yibo Wu
In the field of cationic polymerization, ferric chloride (FeCl 3 ) has demonstrated exceptional initiation activity but is plagued by inherent structural instability. Consequently, enhancing the stability of this Lewis acid catalyst while preserving its high reactivity represents a critical research challenge with significant practical implications. This study introduces a novel approach by utilizing the [FeCl 3 ∙i-Pr 2 O] complex as a co-initiator, achieving a one-step protocol for the living cationic polymerization of isobutylene (IB) to produce highly reactive polyisobutylene (HRPIB) with α-olefin content reaching up to 94 %. The research systematically investigates the polymerization kinetics by examining the effects of isopropyl ether (i-Pr 2 O) content, reaction time, solvent polarity, and monomer concentration. Through comprehensive 1 H NMR structural analysis and Gaussian 09 computational simulations, the study reveals that i-Pr 2 O plays a dual-functional role: it not only stabilizes the FeCl 3 active centers but also promotes polyisobutylene chain termination, ultimately yielding three distinct olefin-terminated polyisobutylene derivatives. Building upon this innovative polymerization strategy, the research successfully demonstrates the synthesis of a PIBVE-b-PIB-b-PIBVE triblock copolymer using the [tBuDiCumCl] [FeCl 3 ∙i-Pr 2 O] initiation system.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
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2021
·
IF 2.262
Shengpei Wang,Shasha Yu,Jianxiang Feng,Shenggao Liu
A new multifunctional lubricant additive (PIBSI-BSb) was synthesized by modifying polyisobutylene succinimide dispersant (PIBSI) with borated Schiff base. The results show that the antiwear and antioxidant properties of PIBSI were improved by modification with borated Schiff base, but the dispersibility was not decreased. Compared with PIBSI, the oxidation induction time (OIT) of PAO containing PIBSI-BSb was prolonged by 6.26 times, and the mean wear volume of steel ball lubricated by the PIBSI-BSb was reduced by 79.1%. The worn scars of steel balls were analyzed by SEM, EDS and XPS. The tribofilm consists of B2O3, FeO, N-containing organic compounds and iron fluoride, which indicates that the B and F atoms of PIBSI-BSb improve the antiwear capabilities.
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2016
·Vol. 133
·期 19
·
IF 1.866
Jinyuan Wang,Chaoying Wan,Yong Zhang,Yinghao Zhai,Shiqiang Song,Wentan Ren,Zonglin Peng
Commercial brominated poly(isobutylene- co -isoprene) (BIIR) rubber has been directly used for the initiation of atom transfer radical polymerization (ATRP) by utilizing the allylic bromine atoms on the macromolecular chains of BIIR. The graft copolymerization of methyl methacrylate (MMA) from the backbone of BIIR which was used as a macroinitiator was carried out in xylene at 85 °C with CuBr/ N , N , N ′, N ″, N ″-pentamethyldiethylenetriamine as a catalytic complex. The polymerization conditions were optimized by adjusting the catalyst and monomer concentration to reach a higher monomer conversion and meanwhile suppress macroscopic gelation during the polymerization process. This copolymerization followed a first-order kinetic behavior with respect to the monomer concentration, and the number-average molecular weight of the grafted poly(methyl methacrylate) (PMMA) increased with reaction time. The resultant BIIR- graft -PMMA copolymers showed phase separation morphology as characterized by atomic force microscopy, and the presence of PMMA phase increased the polarity of the BIIR copolymers. This study demonstrated the feasibility of using commercial BIIR polymer directly as a macromolecular initiator for ATRP reactions, which opens more possibilities for BIIR modifications for wider applications. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43408.
研究领域:
高分子化学
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材料科学
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DOI
高影响因子
Journal of Coatings Technology and Research
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2024
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IF 2.3
Lyu Xiang,Dai Jianlong,Yan Wentao,Zhou Yong,Gao Congjie
Reverse osmosis (RO) membranes have been widely used in seawater desalination and drinking water preparation due to their outstanding ability to retain low valence salt ions and large organic molecules. Small neutral molecules (SNMs) are widely present in water, typically represented by boric acid in seawater and urea in wastewater. Reducing SNMs to meet drinking water standards is a new challenge for RO membranes. In this study, we developed a thin-film composite RO membrane tailored for seawater desalination, demonstrating exceptional selectivity against SNMs and heightened permeability. Specifically, a nonionic surfactant, flexible polyisobutylene succinimide (PIBSI), was added into the organic phase to react with trimesoyl chloride (TMC). The results showed that the new product, PIBSI–TMC, effectively exhibited the dual function of surfactant and co-monomer changed the physicochemical structure of PA formation during the interfacial polymerization process based on the detailed characterization. PIBSI integrated into the PA matrix significantly enhanced the hydrophobicity of the membrane surface and increased the specific surface area. Simultaneously, the pore size within the layer was reduced, and defects on the RO membrane surface were filled. The objectives were achieved by enhancing the size exclusion mechanisms effect, reducing SNMs diffusion rate, and ultimately improving selectivity. Experimental results demonstrated that the novel membrane achieved excellent desalination performance and a maximum boron removal efficiency of up to 90.40% in simulated seawater (32000 ppm NaCl, 5 ppm boron) compared to virgin membrane. The produced freshwater meets drinking water standards in various regions. Additionally, it exhibited higher flux (48.0 L m −2 h −1 , 55.0 bar, approximately 26.4% permeate flux decline) compared to similar membranes. In addition, the rejection of SNMs in wastewater represented by urea was also effective. Therefore, it is favorable for application in resource recovery and pollutant removal. In conclusion, this novel RO membrane holds broad prospects for applications in seawater desalination and potable water production. Graphical abstract
研究领域:
环境科学
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材料科学
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化学工程
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水处理
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2024
·Vol. 59
·期 45
·20929-20943
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IF 3.5
Ye Cai,Li Xiaohong,Chen Jianjun,Hafsa
Crosslinking is a crucial step to keep fibrous morphology and improve ceramic yield in the fabrication process of SiC fibers. Comparing with the oxygen crosslinking, thermal crosslinking can reduce the introduction of oxygen within fibers. In this study, a novel method for preparing the SiC fibers was proposed by combining dry spinning and thermal crosslinking. The spinning solution was prepared by blending a low-molecular-weight (~ 1000 Da) polycarbosilane (PCS) with polyisobutene (PIB) as spinning additive, acrylic acid (AA) as crosslinking agent, and 2,2'-Azobis (2,4-dimethyl) valeronitrile (ABVN) as initiator. The crosslinking mechanism, morphology, composition and microstructure, and mechanical properties of fibers were investigated. The results showed that the morphology of AA-containing PCS fibers was well preserved at 300 ℃ with a low heating rate (0.5 ℃/min), while PCS fibers without AA exhibited the melting or deformation. The crosslinking reaction between C = C groups in AA-containing PCS and Si–H bonds in PCS was triggered by ABVN. Furthermore, AA-containing PCS green fibers experienced pyrolysis at 1100 ℃ and then were annealed at 1500 ℃ (denoted as SiC-1500). SiC-1500 fibers, with an average diameter of 10.47 ± 0.50 μm and average tensile strength of 1.35 ± 0.65 GPa, have a smooth surface and relative dense structure. But SiC-1500 fibers were still an amorphous structure due to the suppression of graphite phase for the growth of β-SiC grains. This work not only breaks through the limitations that only uses high-molecular-weight PCS for dry spinning, but also successfully combines dry spinning and thermal crosslinking technology to obtain SiC fibers. Graphical abstract
研究领域:
材料科学
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陶瓷学
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纤维科学
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产品关联
DOI
高影响因子
POLYMER
·
2024
·
IF 4.1
Ying-Zi Wu,Yu-Zhuang Gao,Cong-Lei Zhao,Meng-Ying Wu,Yi-Xian Wu
A series of amphiphilic polyisobutylene- b -poly(2-ethyl-2-oxazoline) (PIB- b -PEOX) diblock copolymer/Ag nanoparticle composites were successfully in-situ synthesized via cationic ring-opening polymerization of 2-ethyl-2-oxazoline (EOX) with high initiation efficiency by using allyl bromide end functionalized polyisobutylene (PIB-allylBr) as a macroinitiator and AgClO 4 as a coinitiator. The microphase separation formed in the resulting PIB- b -PEOX diblock copolymers due to the thermodynamic imcompability of hydrophilic PEOX segments and hydrophobic PIB segments. The micromorphology of phase separation is dependent on the copolymer composition, in which sea-island micromorphology formed for PIB 118 - b -PEOX 80 and bicontinuous phase micromorphology formed for PIB 118 - b -PEOX 97 . The micelles with nano-scale size in the range of 15 - 80 nm and having high drug loading rate of ca. 48.9% can be formed by self-assembly of the amphiphilic diblock copolymers in n-hexane. The drug cumulative release rate can be increased with an increase in the proportion of PEOX segments, due to the strong interaction between ibuprofen and the PEOX segments. The hydrophilicity of the PIB- b -PEOX diblock copolymer surfaces can be improved after ethanol vapor induction. The PIB- b -PEOX diblock copolymers behave biocompatibility and good anti-protein adsorption property. The amphiphilic PIB- b -PEOX) diblock copolymer /Ag nanoparticle composites exhibit high antibacterial efficiency for Gram-negative bacterium ( E. coli) and Gram-positive bacterium (S. aureus) . To the best of our knowledge, this is the first example of PIB- b -PEOX diblock copolymer/Ag nanoparticle (6.4 ±2.6 nm) composites synthesized in-situ with good biocompatibility, anti-protein adsorption, and antibacterial properties, which would have potential applications for drug delivery and anti-protein coating in biomedical areas
研究领域:
高分子化学
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纳米技术
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材料科学
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生物医学工程
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产品关联
DOI
高影响因子
Energy Storage Materials
·
2025
·
IF 20.2
Miao Ji,Dan Liu,Benben Peng,Yongjian Liu,Xingshu Liao,Deyu Qu
The integration of sulfide solid-state electrolyte (SSE) membranes with silicon-based anodes presents a compelling pathway toward all-solid-state lithium batteries (ASSLBs) with unparalleled energy density and intrinsic safety. However, the compatibility between thin sulfide electrolyte membranes and volume-altering silicon-based anodes has rarely been explored. Here, we systematically investigate the failure mechanisms of electrolyte-free silicon-carbon (Si-C) anodes when paired with dry- or wet-processed sulfide SSE membranes, identifying two degradation pathways: (1) binder decomposition within SSE membranes and (2) stress concentration-induced interfacial delamination . To address these challenges, we engineer a wet-processed sulfide SSE membrane (∼50 μm thickness) by utilizing a chemically inert polyisobutylene (PIB) elastomer binder and a rigid polypropylene (PP) fabric scaffold. This design synergistically endows the SSE-PIB-PP composite membrane with elastic dissipation (411 MPa modulus) and mechanical reinforcement (34.7 MPa tensile strength) while maintaining high ionic conductivity (2.5 mS cm⁻¹). Operando pressure monitoring tests reveal that the membrane redistributes ∼35.5 % of internal stresses generated during Si volume swings, mitigating chemical decomposition and mechanical fracture. The optimized Li-In|SSE-PIB-PP|Si-C half cells deliver exceptional cyclability with 81.3 % capacity retention after 400 cycles (over 200 days) at 0.1C and a high initial delithiation capacity of 5.31 mAh cm −2 at a loading of 7.63 mg cm −2 . Furthermore, the assembled Si-C|SSE-PIB-PP|LiCoO 2 full cell exhibits decent cycling stability at 0.1C with a high cathode loading of 19.51 mg cm −2 . This work demonstrates the potential of optimizing SSE membranes to address key challenges of alloy-type anodes in ASSLBs and provides critical insight for developing reliable high-energy-density ASSLBs.
研究领域:
材料科学
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电化学
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储能技术
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固态电池
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电池工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2017
·
IF 3.887
Yanqiu Du,Chunming Li,Jing Jin,Chao Li,Wei Jiang
Amino acid-based P(acryloyl-6-aminocaproic acid) (PAACA) brushes were fabricated on polyisobutylene (PIB) surface combined with plasma pre-treatment and UV-induced grafting polymerization to construct an antifouling and functional material. The hydrophilicity and hemocompatibility of PIB were largely improved by surface modification of AACA, which were confirmed by water contact angle and platelet adhesion, respectively. PAACA brushes were precisely located onto the surface of PIB to create a patterned PIB-g-PAACA structure, and then the carboxyl groups on PAACA was activated to immobilize functional protein-Concanavalin A (Con A). The obtained Con A-coupled microdomains could further capture erythrocytes. This method developed a platform on commercial PIB surface via amino acid-based polymer brushes which had a promising application in drug delivery and disease diagnosis.
研究领域:
材料科学
·
生物医学工程
·
高分子化学
·
表面科学
✓ 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）