JOURNAL OF MEMBRANE SCIENCE
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2021
·
IF 8.742
Yuqing Sun,Dean Xu,Shilong Li,Lele Cui,Yongxiang Zhuang,Weihong Xing,Wenheng Jing
Severe stacking and swelling properties are critical issues in two-dimensional (2D) lamellar membrane fabrication and separation processes that can result in low flux and poor rejection. Herein, we propose the assembly of multidimensional MXene-carbon nanotube (CNT) ultrathin membranes by loading a MXene intercalated with CNTs onto a tubular ceramic membrane . Benefiting from the modes of van der Waals interactions (hydrogen bond) and repulsion forces between the MXene and functionalized CNTs, the one-dimensional (1D) CNTs are well dispersed and intercalated into the 2D MXene nanosheets , forming a uniform network and continuous three-dimensional (3D) labyrinthine short mass transfer channels, which can considerably improve the permeability and rejection performance of the membranes. Furthermore, the membranes exhibit a distinct suppressed swelling property via a facile thermal crosslinking process (-OH + -OH = -O- + H 2 O and -COOH + -OH = -COO + H 2 O), accompanied by the formation of new chemical bonds (Ti-O-C and Ti-COO-C) due to dehydroxylation between the neighboring MXene nanosheets and CNTs. Additionally, 50 h long-term operation studies also indicate the promising anti-swelling property and stability of the MXene-CNT membranes. This multidimensional (1D and 2D) assembly and thermal crosslinking strategy represents a new avenue for the facile and scalable development of MXene-based and other 2D material-derived high-performance membranes for water purification .
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
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 139
·期 10
·51639
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IF 3.125
Haixiang Hu,Yu Qiu,Zheng Lu,Chuxuan Tang,Hailin Yao,Ming Cheng
The logical coherence macro–micro experiments about the anti-swelling performance of polyetheramine-230 (PEA-230) on expansive natural soil are presented in this paper. Further, the expansion of the soil in the solution and water system is considered. Great significance in treating the expansive soil broadens the applied range of polyetheramine-230. The mechanism is assessed by X-ray diffraction (XRD) in the state of wet and dry montmorillonite (Mt), XRD of dry clay extracts from the soil, zeta potential measurement, thermogravimetric analysis, and scanning electron microscopy. The results prove the significant effect of controlling the expansion of expansive soil. PEA-230 strongly adsorbs on the surface of soil particles and intercalates into the layer structure. Further, the PEA-230/soil hybrids can be judged as usable engineering soil with low expansion characteristics. Additionally, the concentration of PEA-230 controls the treatment effect, and 1 wt% PEA-230 is a proper concentration to treat the expansive soil. In particular, PEA-230 has excellent characteristics such as small molecular weight, good water solubility, and good stability. Thus PEA-230 can be regarded as a great agent to treat in-situ expansive soil.
研究领域:
土木工程
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材料科学
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地质学
✓ 已验证
DOI
高影响因子
APPLIED CLAY SCIENCE
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2019
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IF 3.89
Chun Hui Zhou,Li Cun Jun,Will P. Gates,Ting Ting Zhu,Yu Wei Hua
Organo-montmorillonite (OMt) has been widely used in paints, drilling fluids, clay/polymer nanocomposites , adsorbents and biosensors , however the full potential of OMt is yet to be discovered. The co-introduction of cationic and nonionic species into Mt has great potential to expand modification strategies and applications of Mt However, details regarding the intercalation mechanism of dual organic species remain unclear and the aspects of hydrophobicity and swellability of OMt are unknown. In this work, the co-introduction into OMt of octadecyltrimethylammonium (ODTMA + ) cations and a nonionic specie erucamide (EA), and ODTMA + with an oleamide (OA). was investigated. The resultant OMt samples were characterized by powder X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis and scanning electron microscopy. Hydrophobicity and swellability of the OMt were examined. The results showed that neither EA nor OA could be effectively introduced into the interlayer spaces of Mt, although adsorption of EA and OA onto the external surface of Mt did occur. In the presence of ODTMA + , however, both EA and OA were successfully co-intercalated into the interlayer spaces of Mt, and the basal spacing (d 001 ) of ODTMA + , EA and OA co-intercalated OMt increased to as much as 4.2 nm. Such dual modification appeared to be effective at tailoring hydrophobicity. The swellability of ODTMA + , EA and OA co-intercalated OMt in xylene increased with the increase in the amount of EA and OA loaded. When Mt was modified using 1.0 CEC ODTMA + with 0.5–1.75 CEC EA, 0.2 g OMt in 10 mL xylene swelled to take 10 ml volume, equating to a swell index of 100%. Here, a two-stage intercalation is proposed: cationic exchange of ODTMA + to form a paraffin-type monolayer, followed by hydrophobic entropy-driven adsorption of nonionic EA and OA by intertwining organic chains into the interlayer spaces of the OMt The findings show the promise of co-intercalation to introduce many other cations and nonionic organic species into the interlayer spaces of Mt, and thus greatly expands the types of OMt for new applications.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2024
·
IF 3.8
Yongquan Han,Zhixue Yu,Zijun Guan,Rui Ma,Yuzhou Hu
Supramolecular gel can be used to seal fractures and pores in the formation during oil and gas drilling and production. In this study, a supramolecular gel plugging agent based on hydrophobic association was prepared by free radical polymerization of acrylamide, octadecyl methacrylate, sodium dodecyl sulfate and other monomers by micellar copolymerization. The forming time, rheology, swelling, mechanical properties and plugging properties of supramolecular gels were studied. The experimental results show that the formation time of supramolecular gel plugging agent is controllable, and it has excellent viscoelastic recovery ability in a certain range of shear strain and scanning frequency. When the compression amount is close to 88.3%, the compressive stress reaches 3.82 MPa. Meanwhile, the swelling performance of supramolecular gel was good, and the equilibrium swelling degree reached 22.1% after 188 min swelling in 15% NaCl brine solution. In 1% NaCl solution, the equilibrium swelling degree of supramolecular gel reached 32.5%. In addition, supramolecular gel has strong formation bonding ability, good plugging performance, plugging rate is greater than 95%, can effectively reduce the leakage and improve the plugging effect of low permeability layer. It is of reference and guiding significance for the long-term plugging of heterogeneous and malignant leakage formations.
研究领域:
石油工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2024
·
IF 6.1
Xin Guan,Mengliang Bi,Shengyu Sun,Yongqi Yang,Jian Sun,Zhaohui Jin,Hailun Ren,Zijian Gao
A hydrogel is an ideal matrix material for flexible electronic devices, electronic skin and health detection devices due to its outstanding flexibility and stretchability. However, hydrogel-based flexible electronic devices swell once they are placed in a high humidity or underwater environment. The swelling behavior could damage the internal structure of hydrogels, ultimately leading to the reduction or complete loss of mechanical properties, electrical conductivity and sensing function. In order to resolve the above problems, a double network ionogel with remarkable anti-swelling behavior, stretchability and conductive properties was prepared. The ionogel consisted of gelatin (G) and copolymerization of acrylic acid (AA), 2-hydroxyethyl methacrylate (HEMA), butyl acrylate (BA), dimethylaminoethyl methacrylate maleate (D) and N,N′-methylene-bis-acrylamide (MBAA). Due to the dense crosslinking network and hydrophobic interaction, the ionogel exhibited remarkable anti-swelling properties (7.64% of the 30-day equilibrium swelling ratio in deionized water). D and MBAA were simultaneously introduced into the ionogel system as cross-linking agents to provide a large number of cross-linking points, improving the cross-linking density of the ionogel. Importantly, the introduction of D avoided ionic leakage by free radical copolymerization. Furthermore, the ionogel maintained stable mechanical properties and conductivity after being submerged in deionized water owing to remarkable anti-swelling performance. The mechanical properties of the ionogel retained 89.75% of the initial mechanical properties after a 5-day immersion in deionized water. Therefore, this ionogel could be employed as an underwater flexible wearable sensor for high humidity or underwater motion monitoring.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES COMMUNICATIONS
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2025
·
IF 7.7
Yi-Wei Li,Xinyu Ai,Ruixiang Guo,Yeming Zhai,Kai-Ge Zhou
Swelling significantly limits the performance and practical applications of two-dimensional (2D) membranes in aqueous environments. Here, we present an innovative "armor strategy" to enhance the anti-swelling performance of negatively charged 2D membranes, using vermiculite membranes (VM) as a model system. By spin-coating polyethyleneimine (PEI) onto the membrane surface and cross-linking with trimesoyl chloride (TMC), a robust protective layer was formed. The resulting VM-PEI-TMC membrane (VPTM) exhibits remarkable swelling resistance, with a swelling rate of only 0.83%, compared to 23.70% for unmodified VM. Practical applications of VPTM in ion sieving, dye rejection, and high-temperature operations demonstrated stable performance, with rejection rates of methylene blue (MB), rhodamine B (RB), and potassium ferricyanide (PF) exceeding 95% at 80°C. Furthermore, the universality of the armor strategy was established by applying it to graphene oxide membranes (GM), achieving a swelling rate reduction from 55.93% to 5.02%. These results highlight the versatility and effectiveness of the armor strategy, providing a promising pathway for developing high-performance, anti-swelling 2D membranes for environmental and energy applications.
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
Polymers
·
2023
·Vol. 15
·期 12
·2637
·
IF 5
Jianchao Zhou,Li Jin,Xinxing Wu,Hui Wang,Shuaibo Han,Yan Zhang,Fangli Sun
The environmental moisture changes would result in the deformation and cracking of laminated bamboo lumber (LBL) easily due to the unreleased internal stress, leading to poor durability. In this study, a hydrophobic cross-linking polymer with low deformation was successfully fabricated and introduced in the LBL by polymerization and esterification to improve its dimensional stability. In an aqueous solution, the 2-hydroxyethyl methacrylate (HEMA) and Maleic anhydride (MAh) were employed as the base compounds for synthesizing the copolymer of 2-hydroxyethyl methacrylate and maleic acid (PHM). The hydrophobicity and swelling performance of the PHM was adjusted by controlling the reaction temperatures. PHM-modified LBL’s hydrophobicity as indicated by the contact angle, increased from 58.5° to 115.2°. The anti-swelling efficiency was also improved. Moreover, multiple characterizations were applied to clarify the structure of PHM and its bonding linkages in LBL. This study demonstrates an efficient avenue to facilitate the dimensional stability of LBL by PHM modification and sheds new light on the efficient utilization of LBL using a hydrophobic polymer with low deformation.Keywords:laminated bamboo lumber;hydrophobic polymer;dimension stability;anti-swelling
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Daijun Du,Huancai Fan,Wanfen Pu,Mingming Song,Yangyang Zhang,Yajuan Dou
A novel low-density multistage expansion preformed particle gel (LDMPG) was synthesized to mitigate gas breakthrough. To investigate LDMPG's potential of fractures plugging and enhanced oil recovery, the structure, micromorphology, expansion property, and thermal stability were characterized, followed by core-flooding experiments. Experimental results indicated that hollow glass microspheres (HGMs) were grafted onto LDMPG through chemical modification and polymerization. The LDMPG can expand 30 times under formation conditions, while maintaining a density of 1.06 g/cm 3 . The temperature resistance can withstand up to 120°C, while the salt resistance can tolerate up to 200,000 mg/L. After 90 days of aging, the transition pressure and toughness coefficient were 107.9 KPa and 0.82, the retention rates were 81.9% and 85.4%, respectively. The core flooding experiments demonstrated that LDMPG can effectively plug fractures, thereby enhancing the oil displacement efficiency of the matrix by approximately 19%. All the results indicated that LDMPG had great potential in conformance control of fractured tight reservoirs.
研究领域:
石油工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2020
·
IF 7.182
Haichang Ding,Baoqiang Li,Zonglin Liu,Gang Liu,Shouzhi Pu,Yujie Feng,Dechang Jia,Yu Zhou
Injectable chitosan hydrogels exhibit excellent biological properties for application in biomedical engineering, however most of these hydrogels have limited applicability because “Swelling” can induce volume expansion of conventional hydrogels implanted in the body damages the surrounding tissues. Here, we report a new “Nonswelling” pentenyl chitosan (PTL-CS) hydrogel via N‒acylation reaction to graft an UV crosslinkable short hydrophobic alkyl chain ( n ‒pentenyl groups). The incorporated pentenyl groups can be crosslinked by UV irradiation to form hydrophobic chains via combination termination, which generate strong hydrophobic effect to extrude the excess water in hydrogel, resulting in a “Nonswelling” state at biological temperature. Furthermore, the PTL-CS solution showed no cytotoxicity in vitro and minimally invasive treatment in vivo demonstrated the PTL-CS hydrogel no adverse effects in a rat model. The nonswelling injectable and UV crosslinkable chitosan hydrogel hold potential applications in smart biomaterials and biological engineering as well as providing a new natural hydrogel in minimally invasive tissue engineering..
研究领域:
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2019
·
IF 13.903
Zong Lu,Yanying Wei,Junjie Deng,Li Ding,Zhong-Kun Li,Haihui Wang
A 2D membrane-based separation technique has been increasingly applied to solve the problem of fresh water shortage via ion rejection. However, these 2D membranes often suffer from a notorious swelling problem when immersed in solution, resulting in poor rejection for the monovalent metal ion. The design of the antiswelling 2D lamellar membranes has been proved to be a big challenge for highly efficient desalination. Here a kind of self-crosslinked MXene membrane is proposed for ion rejection with an obviously suppressed swelling property, which takes advantage of the hydroxyl terminal groups on the MXene nanosheets by forming Ti–O–Ti bonds between the neighboring nanosheets via the self-crosslinking reaction (−OH + −OH = −O– + H2O) through a facile thermal treatment. The permeation rates of the monovalent metal ions through the self-crosslinked MXene membrane are about two orders of magnitude lower than those through the pristine MXene membrane, which indicates the obviously improved performance of the ion exclusion by self-crosslinking between the MXene lamellae. Moreover, the excellent stability of the self-crosslinked MXene membrane during the 70 h long-term ion separation also demonstrates its promising antiswelling property. Such a facile and efficient self-crosslinking strategy gives the MXene membrane a good antiswelling property for metal ion rejection, which is also suitable for many other 2D materials with tunable surface functional groups during membrane assembly.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yue Wang,Hao Jiang,Yuhan Zhang,Zhichao Song,Zijie Chen,Kunyan Sui,Wenxin Fan,Pengfei Qi
Harvesting ocean salinity energy has attracted large attentions based on different kinds of asymmetric ionic membranes. Gradient polyelectrolyte hydrogels demonstrated superior power generation capacity due to their abundant charged groups and rectification behaviors. However, they generally suffer from the electrostatic screening and dramatic swelling, leading to unsatisfactory energy conversion performance. Here, an anti-swelling, salt-tolerant gradient polyanion hydrogel is reported for high-efficiency osmotic energy conversion. The gradient polyanion hydrogel is prepared by ultraviolet (UV) induced copolymerization of anionic monomer and aromatic monomer. Benefiting from the mutual electrostatic interaction and π-π conjugation interaction, the gradient polyanion hydrogel presents the outstanding anti-electrostatic screening and anti-swelling performance. As a result, they can maintain excellent cation selectivity and ionic diode effect for providing an ultrahigh power density of 16.4 W/m 2 when mixing artificial seawater and river water. This new salt-tolerant gradient polyelectrolyte hydrogel provides a promising way to recover energy from seawater and wastewater.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Yuling Tang,Yuqi Li,Yingjiao Zhang,Chuanhui Mu,Jianfei Zhou,Wenhua Zhang,Bi Shi
The discharge of emulsion, cationic dyes, and heavy metals often coexists in wastewaters, greatly enhancing the difficulty of processing. In this work, we fabricated a nonswelling silica–poly(acrylic acid) (SiO2–PAA) composite through the surface modification of SiO2 using PAA to remove emulsion, cationic dyes, and heavy metal co-contaminants simultaneously. In the SiO2–PAA composite, PAA exists in a linear and divergent form rather than a network structure. Thus, SiO2–PAA can gain the nonswelling property, provide abundant carboxyl groups as the binding sites for removal of pollutants, which is an important advanced feature of PAA-based materials, and improve the potential of practical application. The characterization results of SiO2–PAA demonstrated that PAA was successfully grafted on SiO2. In a monocomponent system, SiO2–PAA exhibited excellent separation efficiency for cetyltrimethyl ammonium bromide (CTAB)-stabilized emulsion separation and admirable adsorption capacity of 758.6 and 178.6 mg/g for methylene blue (MB) and Cr(III). This finding was ascribed to the exposure of carboxyl groups in SiO2–PAA, which could increase the mass transfer efficiency. Importantly, the SiO2–PAA composite exhibited high efficiency in the simultaneous uptake of CTAB-stabilized emulsion, MB, and Cr(III) co-contaminants. Thus, given the simple fabrication, efficient emulsion separation, admirable adsorption capacity, and excellent reusability of SiO2–PAA, it exhibits striking potential for the efficient treatment of coexisting pollutants.
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
危险品化学品经营许可证（带存储）