MACROMOLECULAR MATERIALS AND ENGINEERING
·
2021
·Vol. 307
·期 1
·2100539
·
IF 4.367
Zhaojie Yang,Minghua Zhang,Zhixin Zhao,Xi Zhang,Minmin Fan
The quaternized polysulfone/polyquaternium-10 (QPSU/PQ-10) anion exchange membranes (AEMs) with a semi-interpenetrating network are prepared by the simple solution casting method. The effects of the mass ratio of chloromethylated polysulfone (CMPSU) to PQ-10 and the molar ratio of quaternized chloromethyl (QCM) to cross-linked chloromethyl (CCM) on the performance of AEM are systematically investigated. The results show that the introduction of PQ-10 endows the QPSU/PQ-10 AEM with excellent mechanical performance. More specifically, the QPSU/PQ-10 AEM has moderate water uptake, swelling ratio, and ion exchange capacity (IEC) at an appropriate composition ratio and crosslinking degree. In particular, the tensile strength and elongation at break of the QP0.5-1 membrane with the optimal composition ratio and crosslinking degree are 23.63 MPa and 20.07%, respectively; and its ion conductivity is up to 69.91 mS cm −1 at 80 °C. Furthermore, the peak power density of the single fuel cell assembled from the QP0.5-1 membrane is 75.64 mW cm −2 at 60 °C. Herein, the QPSU/PQ-10 AEM has good thermal oxidation stability, mechanical properties, and ion conductivity, highlighting the potential of bio-based PQ-10 as an ion-conducting functional molecule in AEMs.
研究领域:
材料科学
·
燃料电池技术
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Sidra Chaudhary,Xuhao Zhang,Yi Bai,Simo Ma,Yong Wu,Qinxiang Jia,Xiaoyong Li,Yang Sun
This study introduces an innovative method for synthesizing multifunctional water-retaining agents via ammonium persulfate-initiated alkaline copolymerization of sodium humate with diverse functional components. The resulting materials exhibit exceptional and reproducible water/saline absorbing capabilities, outstanding water retention performance, and remarkable UV resistance. Structural characterization demonstrates that sodium humate's graphite backbone can be either preserved or modified depending on the copolymerized components, with polyvinyl alcohol (37.41–93.82 g g −1 ) and polyvinyl pyrrolidone (39.23–97.66 g g −1 ) composites showing particularly superior water absorption properties over 18 recycling cycles. A significant discovery is the concurrent formation of ammonium nitranilate, a high-energy-density salt, whose production from humic acid not only confirms Stevenson's structural model featuring quinone moieties but also offers an economical alternative to conventional chloranil-based synthesis that requires hazardous chlorine gas and expensive precursors. This work thus accomplishes dual breakthroughs: developing high-performance irrigation materials for arid regions while establishing a highly effective valorization pathway for humic acid to produce valuable energetic compounds.
研究领域:
高分子化学
·
农业工程
·
材料科学
·
环境化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TRIBOLOGY INTERNATIONAL
·
2022
·
IF 5.62
Hongling Fang,Yi Li,Songwei Zhang,Qi Ding,Litian Hu
In this work, the functional protic ionic liquid (PIL) of dibutylammonium 3-(methylthio) propionate ([N44HH][MTP]) with good lubrication properties but poor oil solubility and the common PIL of dioctylammonium oleate ([N88HH][OA]) with good oil solubility but poor lubricating performance were selected. The binary ionic liquid (BIL) of [N88-N44][OA-MTP] was creatively obtained by combining [N44HH][[MTP] with [N88HH][OA]. Interestingly, the BIL has good oil solubility in PAO base oil and maintains outstanding lubricating performance, indicating that such an approach improves the oil solubility of functional PILs without worsening lubrication properties. In addition, the compatibility between two PILs and the lubrication mechanism of the BIL system were analyzed and described by means of several analytical methods.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2019
·
IF 2.291
Xiaoyan Gan,Junfeng Yu,Wenhui Zhao,Liling Guo,Hanxing Liu
This paper introduced new two dimensional (2D) benzylammonium (BZA) based perovskites incoorperated with hexamethylendiammonium (HDA) for solar cell application. The influence of HDA additive on the cystallinity, morphology, photoelectrical properties and stability of (BZA) 2 (MA) 2 Pb 3 I 10 (MA = CH 3 NH 3 + ) were investigated. Results showed that the incorporation of diamine cation into the Ruddlesden-Popper perovskite (BZA) 2 (MA) 2 Pb 3 I 10 was useful in improving its phase purity, surface roughness , conductivity and performances in perovskite solar cells . The 2D (BZA) 2 (MA) 2 Pb 3 I 10 perovskite films with HDA incorpation showed much enhanced moisture stability than its 3D perovskite counterpart MAPbI 3 . By optimizing the HDA concetration, an efficiency of 3.33% was obtained for mesostrucured (BZA) 2 (MA) 2 Pb 3 I 10 based perovskite cell, which is more than a time higher than that of (BZA) 2 (MA) 2 Pb 3 I 10 without HDA (1.59%). Our work emphasized the significance of material purity and quality for BZA based perovskite solar cells, demonstrating the validity of mixed amine cations in improving their photovoltaic performance .
研究领域:
材料科学
·
能源研究
✓ 已验证
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2016
·
IF 3.976
Lei Xiang,Teng-Fei Sun,Mei-Jie Zheng,Yan-Wen Li,Hui Li,Ming-Hung Wong,Quan-Ying Cai,Ce-Hui Mo
Quaternary ammonium compounds (QACs) used as cationic surfactants are intensively released into environment to be pollutants receiving more and more concerns. Sorption of dodecyltrimethylammonium chloride (DTAC), one of commonly used alkyl QACs, to five types of agricultural soils at low concentrations (1–50 mg/L) was investigated using batch experiments. DTAC sorption followed pseudo-second-order kinetics and reached reaction equilibrium within 120 min. Both Freundlich model and Langmuir model fitted well with DTAC isotherm data with the latter better. DTAC sorption was spontaneous and favorable, presenting a physical sorption dominated by ion exchanges. Sorption distribution coefficient and sorption affinity demonstrated that soil clay contents acted as a predominant phase of DTAC sorption. DTAC could display a higher mobility and potential accumulation in crops in the soils with lower clay contents and lower pH values. Sorption of DTAC was heavily affected by ions in solution with anion promotion and cation inhibition.
研究领域:
环境科学
·
土壤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Solar RRL
·
2023
·Vol. 7
·期 10
·2300080
·
IF 7.9
Hong Cui,Yunhao Ning,Yuxuan Yang,Dingqian He,Wentao Chen,Yuqiong Huang,Peng Zhao,Yaqing Feng,Bao Zhang
Aromatic ammonium salts have been regarded as the promising passivators in perovskite solar cell (PSC) fabrications. However, the complicated passivation procedure and inevitable formation of undesirable low-dimensional (LD) perovskite layers limit further development. Furthermore, how the steric and electronic properties of different ammonium cations would influence the passivation is not well understood. Herein, two carefully engineered passivators based on the unique benzothiophene moiety involving the primary and secondary ammonium terminals, BTMA-1 and BTMA-2, respectively, are developed. It is shown that defects and, thus, nonradiative recombination reactions are effectively suppressed by simple posttreatments without the formation of LD perovskite. Interestingly, the champion efficiency of the BTMA-2-treated device increases to 23.10% from ≈20%, along with great stabilities and negligible hysteresis. An in-depth understanding of the passivation effect influenced by steric and electronic properties is explored. The extra electron-donating methyl on the ammonium nitrogen (BTMA-2) increases the electron density on the N atom and the N–H + ionic bond is, thus, boosted, which helps the positive terminal to anchor more tightly to the [PbI 6 ] 4− structure of the perovskite resulting in improved passivation effects. This novel and promising design strategy for ammonium passivators can promote PSCs to achieve further breakthroughs in both efficiency and stabilities.
研究领域:
材料科学
·
光伏技术
·
化学工程
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2023
·
IF 5.8
Zhongfei Gao,Qinbing Qi,Rongkai Li,Chengbo Li,Xianrui Xie,Guige Hou
Uncontrolled bleeding and bacterial infections cause severe damage to the wounds and remain a clinical challenge. Here, we developed a nanofiber/sponge bilayered composite membrane (QCP) containing quaternized silicone (QP12) and quaternized chitosan (QCS12) by joint approaches of electrospinning and freeze-drying and investigated their potential for wound dressing. The QCP was composed of a sponge (QCC) containing collagen (COL) and QCS12 and a nanofibrous membrane (MQP) containing poly-ε-caprolactone (PCL) and QP12. The QCP composite membrane possessed feasible permeability (0.22 ± 0.01 g/(cm 2 ·24 h)), available thermal stability , suitable mechanical properties with natural skin, and in vivo hemostatic efficiency. The bonds of the N -quaternary and Schiff base endow composite membranes with significant anti-microbial invasion, potentially enhancing the wound healing process with an eligible microenvironment. Meanwhile, QCP evinced fine hemocompatibility, low cytotoxicity, negligible skin irritation, and other desirable biosafety as an excellent wound dressing. QCP promoted collagen deposition and re-epithelization to accelerate healing and suppress scars in the full-thickness acute wound models. Furthermore, the evaluation in the chronic skin incision model of diabetes mellitus manifested high healing efficiency with a certain resistance to bacterial infection of the composite membrane. Taken together, the QCP composite membrane may be a potential antibacterial and hemostatic wound dressing.
研究领域:
生物医学工程
·
材料科学
·
创伤修复
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2025
·
IF 4.7
Hao-ran XU,Wei-chao HUANG,A.V. RAVINDRA,Duc-lenh PHAN,Thi-quynh-xuan LE,Li-bo ZHANG,Shao-hua YIN
The oxidation characteristics of sulfite and thiosulfate were examined by using thermodynamic calculations and simulated desulfurization solution experiments to investigate their difference. Subsequently, a new multistage oxidation method using oxygen−ammonium persulfate was presented and applied to the oxidation of a real desulfurization solution. The results show that the concentrations of thiosulfate and sulfite in the real desulfurization solution decrease from 48.76 and 61.76 g/L to 2.24 and 0.02 g/L, respectively, and the ammonium sulfate products obtained are white with uniform particles. In addition, compared with ammonium persulfate alone, the multistage oxidation method can reduce the ammonium persulfate addition by 37.56% and treatment cost by 28.13%.
研究领域:
化学工程
·
环境科学
·
无机化学
·
工业化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION SCIENCE AND TECHNOLOGY
·
2010
·
IF 1.028
Lei Jiang,Senlin Tian,Ping Ning,Hong Mo
Absorption reactors to remove volatile organic compounds from gas streams can be retrofitted, as volatile organic compounds act as oils and form microemulsions. Using the region of microemulsion in the phase diagram as the indicator, the main influences on the solubilization capacity of various microemulsion systems were investigated. When the mass ratio of the surfactant (cetyltrimethylammonium bromide) to the cosurfactant (tetrabutylammonium bromide) was 1:1, the microemulsion was the best absorbent. Comparative absorption tests of microemulsion, distilled water, and surfactants were performed in a double-stirred reactor. The results indicate that the microemulsion has a relatively higher absorption rate and absorption capacity than the other absorbents.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Green Energy & Environment
·
2020
·
IF 6.395
Xinming Du,Hongyu Zhang,Yongjiang Yuan,Zhe Wang
The semi-interpenetrating network anion exchange membranes (AEMs) based on quaternized polyvinyl alcohol (QPVA) and poly(diallyldimethylammonium chloride) (PDDA) are synthesized. The chemical cross-linking structure is formed between hydroxyl groups of QPVA and aldehyde groups of glutaraldehyde (GA), which makes PDDA more stable embed in the QPVA matrix and also improves the mechanical properties and dimensional stability of AEMs. Due to the phase separation phenomenon of AEMs swelling in water, a microporous structure may be formed in the membrane, which reduces the transmission resistance of hydroxide ions and provides a larger space for the transfer of hydroxide ions, thus improving the conductivity. The ring structure of PDDA is introduced as a cationic group to transfer hydroxide ions, and shields the nucleophilic attack of the hydroxide ions through the steric hindrance effect, which improves alkaline stability. The hydroxide conductivity of semi-interpenetrating network membrane (QPVA/PDDA 0.5 -GA) is 36.5 mS cm −1 at 60 °C. And the membrane of QPVA/PDDA 0.5 -GA exhibits excellent mechanical property with maximum tensile strength of 19.6 MPa. After immersing into hot 3 mol L −1 NaOH solutions at 60 °C for 300 h, the OH − conductivity remains 78% of its initial value. The semi-interpenetrating network AEMs with microporous structure exhibit good ionic conductivity, mechanical strength and alkaline durability.
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
ENERGY CONVERSION AND MANAGEMENT
·
2019
·
IF 7.181
Zhang-Wei He,Wen-Zong Liu,Cong-Cong Tang,Bin Liang,Ze-Chong Guo,Ling Wang,Yong-Xiang Ren,Ai-Jie Wang
The emerging organic pollutants, quaternary ammonium compounds, have attracted extensive attention due to their great enrichment in waste activated sludge (WAS). This study selected benzalkonium chlorides (BACs) as model to reveal its effects of levels and alkyl chain lengths (ACLs) on methane production from anaerobic digestion of WAS. Results showed that BACs caused more release of soluble polysaccharides and proteins, increased by 42.6–55.7% and 11.5–19.4%, which were positively related to the levels of BACs. In contrast, the methanogenesis was inhibited, and a higher level or a shorter ACL led to a more significant inhibition. The maximum production of methane was 171.1 mL/g VSS in control, and reduced to 97.8, 41.5 and 7.63 mL/g VSS for ACL16, ACL14 and ACL12 at the BAC level of 25 mg/g TSS, consequently, the corresponding accumulations of short-chain fatty acids were 1.57–1.84 times higher than that of control. Moreover, the presence of BACs also affected the diversities of both bacteria and archaea involved in methane production. Compared to control, BACs reduced Firmicutes , Bacteroidetes and Chloroflexi , especially Firmicutes , with a decrease ratio of 12.6–20.2%, whereas Proteobacteria and Actinobacteria were increased. Besides, a longer ACL led to a higher enrichment of Methanomicrobia , and with the ACLs of BACs decreasing from 16 to 12, the dominant methanogens shifted from acetotrophic to mixotrophic, and further to hydrogenotrophic methanogens. The findings of this study demonstrated that both levels and ACLs of BACs could affect the performance of anaerobic digestion of WAS, as well as the microbial community.
研究领域:
环境工程
·
微生物学
·
污水处理
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Peng Zhang,Fan Yang,Xuedong Zhu,Weizhong Zheng
In this work, a kind of ZSM-5 zeolite with one-dimensional fins growing along the [010] direction has been successfully synthesized utilizing both tetrapropylammonium hydroxide (TPAOH) and tetramethylammonium hydroxide (TMAOH) as co-templates. With the aid of molecular dynamic simulations and a series of experimental evidences, the formation mechanism of the one-dimensional feature is determined to arise from the synergic effects between TPA + and TMA + . Two TPA + and three TMA + would co-exist in a unit MFI cell at a certain crystallization period depending on the composition of zeolite and precursor, and this configuration ensures a minimum stabilization energy required for the growth along [010] direction. Investigations manifest these needle-like fins with diameters of ca. 60 nm could function as pseudo nano crystals and introduce additional pores ranging from 10 to 90 nm, which effectively promotes the diffusion capability and substantially improves the catalytic performance in propane aromatization.
研究领域:
材料科学
·
催化化学
✓ 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）