SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Nengwen Gao,Wei Fan,Zhi-Kang Xu
Protein separation and purification is important in biotechnology and food processing industries. Ceramic membranes have shown great potentials for this task. But membrane fouling remains a barrier to their widespread application due to the irreversible adsorption of protein onto the membrane. In this work, one-step co-deposition of dopamine (DA) and diglycolamine (DGA) was conducted on the ceramic membranes for fabricating protein-resistant surfaces. CuSO 4 /H 2 O 2 was used as a trigger to shorten the deposition time and to improve the deposition efficiency. The effect of DA/DGA mass ratio on the membrane structures and properties was studied by FESEM, FTIR, XPS and contact angle measurements. The results indicate that the optimal DA/DGA mass ratio in the co-deposition solution is 1:4. The modified membranes show improved hydrophilicity and negatively charged property. In dynamic protein filtration, these ceramic membranes exhibit a higher permeate flux, a higher water flux recovery, and a lower water flux reduction compared to the original membrane. Moreover, the antifouling property of the modified membrane is preserved after the membranes are treated with high speed water scouring. As a result, this one-step co-deposition method is a simple and effective way to prepare durable fouling-resistant ceramic membranes for protein removal.
研究领域:
生物技术
·
材料科学
·
分离工程
✓ 已验证
DOI
高影响因子
MINERALS ENGINEERING
·
2020
·
IF 3.795
Zhigang Zhao,Peng Chen,Fan Yang,Qiuxia Liao,Yang Zhang,Panpan Zhao,Wanghuan Guo,Ruixi Bai,Chunqing Cai
The type of diglycolamic acid extractant N , N -di-2-ethylhexyldiglycolamic acid (D2EHDGAA) was examined for selective extraction and separation of Au(III) in acidic chloride solutions containing Pd(II), Pt(IV), Rh(III), and Cu(II). The separation factor β Au/Pt = 959.3 was observed in 7 M hydrochloric acid. The extraction of Au(III) was quick, and extraction equilibrium was reached in less than 5 min. The n -dodecane and kerosene diluents had a notable effect on the extraction of Au(III) with the D2EHDGAA, and the D2EHDGAA had excellent capacity in n -dodecane and kerosene. However, the selectivity coefficient of Au(III) and Pd(II) was better in n -dodecane (β Au/Pd = 1070) than in kerosene (β Au / Pd < 0.1) of 4 M hydrochloric acid. The extraction mechanisms of the Au(III) and Pt(IV) were investigated, and the results suggest that one metals ion is extracted with two and one extractants in 1 M HCl concentration. The D2EHDGAA-based n -dodecane extracting phase was easily activated using a low-concentration thiourea aqueous solution (0.01 M). The recyclability of D2EHDGAA for five cycles was investigated, and its efficiency decreased less than 4%.
研究领域:
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 45
·27969-27977
·
IF 3.361
Yaoyang Liu,Sheng Liu,Zhibin Liu,Chuang Zhao,Chunhui Li,Yu Zhou,Caishan Jiao,Yang Gao,Hui He,Shaowen Zhang
A novel asymmetric diglycolamide N,N-dimethyl-N′,N′-dioctyl diglycolamide (LII) was synthesized. The Nd(III) extraction behavior from HNO3 and loading capability of the solution of LII in 40/60 (v/v)% n-octanol/kerosene were studied. Analyses by the slope method, ESI-MS, and FT-IR indicated that, similar to the previously studied isomer ligand N,N′-dimethyl-N,N′-dioctyl diglycolamide (LI), 1 : 3 Nd(III)/LII complexes formed. Under the same experimental conditions, the distribution ratio and limiting organic concentration of LII towards Nd(III) were smaller than those of LI, but the critical aqueous concentration of LII was larger, which implies that LII exhibited poorer extraction and loading capabilities towards Nd(III) than LI, and LII has a tendency to be less likely to form the third phase. The quasi-relativistic density functional theory (DFT) calculation was performed to provide some explanations for the differences in their extraction behaviors. The electrostatic potential of the ligands indicated that the electron-donating ability of the amide O atoms in LII displayed certain differences compared with LI. This inhomogeneity in LII affected the interaction between LII and Nd(III), as supported by QTAIM and bonding nature analysis, and it seemed to reflect in the extraction performance towards Nd(III).
研究领域:
化学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
HYDROMETALLURGY
·
2024
·
IF 4.8
Chunhua Wang,Runhan Yan,Hongmin Cui,Jinsong Shi,Nanfu Yan,Shengyong You
The separation of yttrium (Y) from heavy rare-earth elements (HREEs) is a major issue for ion-adsorbed rare-earth deposits. This study describes a new extraction system to develop efficient separation of Y from HREEs in a chloride medium using diglycolamic acid as the extractant. The extraction performance of N , N -di(2-ethylhexyl)-diglycolamic acid (HDEHDGA) for mixed REEs of an ion-adsorbed rare-earth deposit was investigated. The extraction order of the REEs in the HDEHDGA system followed a positive sequence, and the extraction behavior of Y resembled that of the middle REEs. Compared with naphthenic acid (NA) and sec-octylphenoxy acetic acid (CA12), HDEHDGA exhibited better separation performance for HREEs (Ho-Lu) and Y. The separation factors of Ho/Y, Er/Y, Tm/Y, Yb/Y, and Lu/Y in the Y-enriched solution were 4.41, 4.29, 3.77, 3.26, and 3.11, respectively. Combined slope analysis and electrospray ionization–high-resolution mass spectroscopy (ESI-HRMS) results identified cation exchange as the extraction mechanism of RE 3+ . Furthermore, the molecular dynamics simulation results provided new insights into the dynamic behaviors of Y 3+ and Yb 3+ extraction and revealed that the interaction of HDEHDGA with Yb 3+ was stronger than that with Y 3+ . In addition, the loading capacity and recyclability of HDEHDGA were evaluated. This study highlights the potential of the HDEHDGA system for the separation of Y from HREEs.
研究领域:
化学工程
·
材料科学
·
计算化学
✓ 已验证
DOI
高影响因子
ACS Omega
·
2019
·
IF 2.584
Sherif M. Ibrahim,Yan Zhang,Yun Xue,Suliang Yang,Fuqiu Ma,Yang Gao,Yu Zhou,Guoxin Tian
The complexation and selectivity of N,N-di(2-ethylhexyl)-diglycolamic acid (HDEHDGA/kerosene, HA) toward the light lanthanides, La(III), Ce(III), Pr(III), and Nd(III), are presented for the extraction from chloride media. In the low pH region (pH 1.8–2.8), the obtained data reveal that the extraction of Ln(III) is governed by cation-exchange mechanism and is driven by the negative change in enthalpy. The results from the slope analysis method suggest the formation of LnA3·(HA)1or2 in the extraction process. As major extracted species with a core of LnA3 in the first coordination sphere, LnA3 might connect with one or two additional HA molecules in the second coordination sphere by hydrogen bonding. The LnA3 core might share similar coordination geometry to those of 1:3 Ln(III) complexes (LnA′3) with water-soluble N,N-dimethyl-diglycolamic acid (HDMDGA, HA′) formed in aqueous solutions or in solid-state compounds. The correlation between the extraction with HDEHDGA (HA) as an extractant and the complexation with HDMDGA (HA′) as a chelator has been explored by interpreting the separation factors for HA with the difference in the stability constants for HA′. Consequently, the ratios of the stability constants of the corresponding 1:3 complexes (LnA′3) with HDMDGA could be reasonably translated to the separation factors (SFs) with HDEHDGA, providing a valuable approach for understanding the origin of the extraction/separation mechanism. By comparing the extraction selectivity of HDEHDGA with that of the currently deployed extractants in the industry such as P204, P507, and Cyanex 272, HDEHDGA offers outstanding selectivity with considerable SFs (SFCe/La = 6.68, SFPr/Ce = 2.79, and SFNd/Pr = 2.65) for light Ln(III) pairs under conditions of low acid concentrations.
研究领域:
化学
·
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Shuai Ma,Fan Yang,Fengzhi Tan,Meiying Xie,Shuwen Yu,Liyan Xue,Zhiwan Li,Tianxi Hu
Nuclear-grade zirconium (Zr) and hafnium (Hf) play an inevitably strategic role in the sustainable development of the nuclear industry. However, the efficient separation of Zr ions and Hf ions is still problematic due to their approximate ionic radii. This work, provides a novel strategy for separating Zr ions and Hf ions by solvent extraction using an HCl solution containing the green amic acid N, N-di-2-ethylhexyl diglycolamic acid (D2EHDGAA). The results demonstrated that D2EHDGAA in HCl solution presented excellent separation performance for Zr ions and Hf ions. The separation factor (β Zr/Hf ) in the simulation liquid was 11.4, and that in the zirconium oxychloride hydrolysate was 34.5 at an HCl concentration of 2.5 mol/L. In addition, the slope method shows that the concentration of Cl - in the feeding water phase plays a controlling role in the separation of Zr ions and Hf ions. Compared with HCl, HNO 3 and ultrapure water, stripping can reach 94.3% at a H 2 SO 4 concentration of 0.1 mol/L. Hopefully, the new environmentally friendly D2EHDGAA-HCl system can match the methyl isobutyl ketone (MIBK)-HSCN system for efficient and selective extraction of Zr and Hf ions and show optimistic application prospects in industry.
研究领域:
化学工程
·
材料科学
·
核工程
·
环境科学
✓ 已验证
DOI
高影响因子
Nanoscale
·
2025
·
IF 5.1
Chuangxin Zhou,Zhiheng Zhang,Yuan Gao,Weize Diao,Siyi Zou,Jun Zhu,Jiangtao Xu,Guozhen Liu
Surface modification of Eutectic Gallium Indium (EGaIn) to inhibit oxidation has been a long-lasting challenge in material science, with limited research reporting the formation of a covalent bond between Ga and modifiers for stability purposes. Taking advantage of strong reductive property of EGaIn, this study developed a simple method for spontaneous reduction of aryldiazonium salts on EGaIn nanoparticle surface to form stable covalent Ga-C sigma bonds, effectively suppressing surface oxidation.Comprehensive characterization confirmed the formation of the covalent Ga-C bond rather than Ga-N=N-C bonds on the EGaIn nanoparticle surface. Approximately 20% of Ga(0) in EGaIn forms Ga-C bonds. Notably, the short chain aryl modified EGaIn nanoparticles exhibited high stability and negligible surface oxidation. This straightforward strategy for preparing stable aryl modified EGaIn nanoparticles allows the introduction of a range of ligands on the EGaIn nanoparticle surfaces, offering promising opportunities for diverse applications across multiple fields.
研究领域:
材料科学
·
纳米科技
·
表面化学
·
生物材料
·
药物递送
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2025
·
IF 6.3
Jinbiao Zhao,Huimin Duan,Xinxin Xu,Shangchao Ji,Hao Yang,Zhichao Huang,Qi Zhong,Dongming Qi
Reactive polyurethane (RPU) films in a solvent-free medium exhibit exceptional stability and mechanical properties due to their highly cross-linked structure. Achieving inherent fire resistance, waterproofing, and high mechanical performance in RPUs is challenging. Here, we prepared an intrinsic flame retardant, waterproof, and flexible RPU using a P/Si synergistic system with hydroxylated ammonium polyphosphate aAPP/Si-RPU via in-situ polyaddition of NCO-double capped prepolymer and polyol components, including polydimethylsiloxane (PDMS) and aAPP. The aAPP was synthesized through cation exchange between diethylene glycol amine (DGA) and ammonium polyphosphate (APP). Compared to pure RPU, aAPP/Si 15% -RPU showed a 60.3 % reduction in peak heat release rate (pk-HRR) and a 14.1 % reduction in total heat release (THR), with the limiting oxygen index (LOI) increasing from 18.2 % to 27.8 %. Mechanical properties and hydrophobicity improved, with tensile strength at 31.9 ± 1.9 MPa, elongation at break at 522.7 ± 20.3 %, and a water contact angle of 127.1°. The balance of properties was due to ordered microphase separation from the organic–inorganic hybrid structure of aAPP and PDMS, where aAPP particles enhanced microstructure and crosslinked interactions, and the Si-O bond in PDMS provided flexibility and water resistance. This study presents a strategy to resolve the conflict between rigidity and toughness, offering design ideas for intrinsic flame retardant polyurethane.
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
Reaction Chemistry & Engineering
·
2024
·
IF 3.4
Hui Jin,Mengyu Cui,Peiwen Liu,Zhuo Wang,Tongxia Jin,Yonghui Yang,Weiping Zhu,Xuhong Qian
Heterogeneous palladium catalysts are widely used in catalytic hydrogenation, oxidation, reduction, and coupling reactions due to their good stability, recyclability, and reusability. Based on the palladium ion fluorescent probe, a novel magnetically recyclable heterogeneous palladium catalyst Fe3O4@FSM@Pd was constructed and characterized, which is highly efficient and reusable for the Suzuki–Miyaura cross-coupling reaction. The subsequent series of Maitlis' filtration test, catalyst concentration–yield kinetic experiments, and phase trajectory experiments further demonstrated that Fe3O4@FSM@Pd catalyzed through a heterogeneous mechanism under selected reaction conditions. In addition, Fe3O4@FSM@Pd was applied to catalyze the synthesis of five intermediates of active pharmaceutical ingredients (APIs): valsartan, sonidegib, erdafitinib, tubulin inhibitor, and lumacaftor. Importantly, the palladium residue in the API intermediates synthesized with Fe3O4@FSM@Pd as catalyst was less than 1 ppm. Furthermore, Fe3O4@FSM@Pd is stable and can be reused at least 5 times without losing activity.
研究领域:
化学
·
材料科学
·
药学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER INTERNATIONAL
·
2024
·
IF 2.9
Yong Yang,Jing Shen,Erxun Hu,Yajin Fang,Zhibo Xu,Juan Li
Poly(lactic acid) (PLA) is known as one of the most promising biodegradable polyesters, while inherent brittleness and insufficient gas barrier performance limit its potential application as a film material. Herein, poly[(butylene diglycolate)- co -furandicarboxylate] (PBDF) with excellent flexibility and good gas barrier properties was synthesized and then melt-blended with PLA. Compared with neat PLA, the elongation at break of the PLA/PBDF20 blend increased more than 40 times and reached over 176.7%. In addition, its O 2 , CO 2 and H 2 O permeability coefficients decreased by 21.3%, 50.8% and 46.3%, respectively. Moreover, the PLA/PBDF20 blend also exhibited better biodegradability, with a weight loss rate increasing from 2.7% of neat PLA to 19.0% after 5 weeks of composting. Notably, incorporation of a multifunctional epoxy compatibilizer (Joncryl ADR®-4368) into the PLA/PBDF blends further enhanced their toughness and gas barrier performance, which could be attributed to the improvement of the miscibility between PLA and PBDF. © 2024 Society of Chemical Industry.
研究领域:
材料科学
·
环境科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Kaixin Huang,Xianguang Zeng,Dan Zhang,Chengyan Wen,Chao Lu,Wenjuan Wu,Yi Guo,Jie Xing
Metallic Zn is a promising anode for high-safety, low-cost, and large-scale energy storage systems. However, it is strongly hindered by unstable electrode/electrolyte interface issues, including zinc dendrite, corrosion, passivation, and hydrogen evolution reactions. In this work, an in situ interface protection strategy is established by turning the corrosion/passivation byproducts (zinc hydroxide sulfates, ZHSs) into a stable hybrid protection layer. The hydrolysis of the diglycolamine buffer layer on the zinc anode provides a homogeneous basic electrolyte environment for the generation of small-sized ZHS, thereby leading to the formation of a ZHS-based hybrid layer. Benefiting from this hybrid layer, uniform zinc ion flux and high anticorrosion ability can be achieved. As a result, the decorated symmetric cell presents a long cycling lifespan of over 1500 h at a current density of 1 mA cm–2 and an area capacity of 1 mAh cm–2. It also contributes to the appealing cycling and rate performance of Zn|NH4V4O10 full cells. This work provides insight into regulating and reusing interfacial byproducts for high-performance zinc metal batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2025
·
IF 16
Yanyan Zhang,Huimin Zheng,Yu Zhao,Cong Du,Jian Zhang,Jinying Liu,Shengjie Jiang,Yan Wei,Chuan-Liang Feng
Chirality is a pivotal determinant in stem cell differentiation, yet discerning the individual effects of chirality across different scales within native three-dimensional (3D) environments remains challenging. Here, a strategy is employed using nanostructures with controlled chirality to precisely assess the impact of molecular and supramolecular chirality on mesenchymal stem cell (MSC) osteogenic differentiation. We synthesized two pairs of enantiomers, l/d-phenylalanine (l/D-Phe) and l/d-1-naphthylalanine (L/D-1-Nap) derivatives, which could form four distinct chiral fibrous hydrogels with different molecular and supramolecular chiralities: L-supP and D-supP (supP indicates supramolecular right-handed helix), and L-supM and D-supM (supM denotes supramolecular left-handed helix). Both experimental and computational analyses reveal that the supramolecular supM/supP helicity is governed by conformational changes in aromatic side chains, switching between outward and inward orientations. Intriguingly, MSCs encapsulated within these chiral fibers displayed osteogenic differentiation that was predominantly influenced by higher-order supramolecular chirality rather than molecular chirality. Specifically, supM-nanofibrils significantly promoted the MSC commitment to the osteoblast lineage, whereas supP-nanofibrils lacked this osteoinductive potential. Additionally, we observed subtle positive and negative modulations of MSC osteogenic differentiation by l- and d-enantiomeric molecular chiralities, respectively. Our study presents a strategy for chiral hydrogel design and delineates how supramolecular chirality surpasses molecular chirality in directing MSC osteogenesis within 3D hydrogels, highlighting the potential of chiral biomaterials in bone tissue engineering.
研究领域:
生物材料学
·
再生医学
·
细胞生物学
✓ 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）