INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2018
·
IF 3.141
Weiping Kong,Yong Liu,Fujian Liu
Efficient micro-meso-macroporous solid acids spheres with controllable acid strength were successfully synthesized by simultaneous grafting of −SO3H and −SO2CF3 onto the network of commercial XAD-4 resin. The synthesized solid acids are designated as XAD-4-SO3H and XAD-4-SO3H-SO2CF3. Various characterizations show that XAD-4-SO3H and XAD-4-SO3H-SO2CF3 possess high BET surface areas, hierarchical porous structures with combined micro-meso-macropores, high concentrations of acid sites, and strong acid strength. Catalytic tests show that XAD-4-SO3H and XAD-4-SO3H-SO2CF3 exhibit superior activities and good reusability in various acid-catalyzed reactions including esterification of acetic acid with cyclohexanol, acylation of anisole with acetyl chloride, and catalytic synthesis of bisphenol A. Their activities were better than the solid acids of Amberlyst-15, SBA-15-SO3H-0.1, H3PW12O40, and acidic zeolites. This work develops a new method for scalable transformation of commercially macroporous resin into efficient porous solid acids, which promotes their wide use in industrial catalysis.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2018
·
IF 5.807
Zengyong Li,Ying Liu,Chuanfu Liu,Shubin Wu,Weiqi Wei
The conversion of cellulose into sorbitol has been recognized as one of most promising biomass valorization routes for the production of high added-value chemicals. In this work, Sulfonic acid-functionalized carbonized cassava dregs supported ruthenium bifunctional catalyst (Ru/CCD-SO 3 H) was prepared. The Ru/CCD-SO 3 H catalyst was employed for direct conversion of cellulose into sorbitol in a neutral aqueous solution. A sorbitol yield of 63.8% could be obtained at 180 °C for 10 h. The acidic sites and metal hydrogenation sites of the Ru/CCD-SO 3 H catalyst played an important role in hydrolytic hydrogenation of cellulose. Particularly, there presented a strong synergistic effect between sulfonic groups and Ru nanoparticles in conversion of cellulose into sorbitol. This synergistic effect was favorable to enhancing the sorbitol yield. Besides, the stability of Ru/CCD-SO 3 H catalyst was investigated under the optimal reaction conditions. The catalytic performance of catalyst was decreased after being used five times.
研究领域:
化学工程
·
生物质转化
✓ 已验证
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Wenjin Niu,Wen Nie,Qiu Bao,Qifan Tian,Ruoxi Li,Xiaohan Zhang,Chenfeng Shi,Ke Tong,Zhihui Zhang
The wettability of coal dust by surfactant-regulated solutions is influenced by the hydrophilic structures of the surfactants. This study combines macro- and microscopic experiments to determine the wettability performance of four surfactants with identical hydrophobic groups but different hydrophilic groups. Through molecular simulation, a molecular-level evaluation standard for the surfactant’s impact on coal dust wettability was established. Additionally, the correlation mechanism between the electrostatic potential distribution of the hydrophilic groups and their wettability was identified. Sulfonic groups—compared with sulfate, hydroxyl, and amino groups—can more effectively enhance the solution’s wettability, reducing the solution’s surface tension to as low as 22.1 mN/m and achieving a molecular wettability area of 78.84. Furthermore, the electrostatic potential extreme of the sulfonic group was − 53.61 kcal/mol, with an electrostatic potential wettability area of 28.99 Å2. This represents an improvement of approximately 34.43 % and 5170.91 %, respectively, compared with hydroxyl groups. Greater electrostatic potential extremes and electrostatic potential wettability areas led to stronger electrostatic adsorption, more adsorbed water molecules, and better wettability of coal dust. This study provides theoretical guidance for the rational design of functional surfactants for surface engineering and pollution control applications.
研究领域:
环境科学
·
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
ACS Applied Polymer Materials
·
2023
·
IF 5
Zi-Xun Chen,Ze-Yong Zhao,Peng Lu,Xiang-Xin Xiao,Shuang He,Cong Deng,Yu-Zhong Wang
In the functionalization of transparent polycarbonate (PC), the addition of additives often results in damage to the transparency of polycarbonate, thereby limiting its application in the field with a high transparent requirement. In this study, sulfonate-group-containing polymeric polyamide SK was synthesized and employed as a functional agent for PC. The results demonstrated that the SK significantly improved the fire safety of PC. 1.0 wt % SK endowed PC with a UL-94 V-0 rating and a limiting oxygen index of 30.4%; compared with that of neat PC, the maximum smoke density (Dsmax) and the peak of heat release rate (PHRR) for 1.0 wt % SK-blended PC were decreased by 21% and 39%, respectively. More importantly, the transparency of the original PC was maintained at 86.4% after incorporation of 1.0 wt % SK, showing only a slight reduction. Here, excellent flame retardancy is ascribed to the synergistic effect of SK-caused physical cross-linking and carbonization. While, high transparency is attributed to the amorphous nature of SK and its good compatibility with PC. This work demonstrates that SK is an efficient polymeric functional agent for fabricating transparent and flame-retardant PC and provides another idea for designing a sulfonate-group-containing flame retardant differing from traditional sulfonates for PC.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2023
·
IF 5
Bingtao Wang,Yu Zhang,Juan Li,Zhengping Fang,Zhenghong Guo,Shiya Ran
There are great demands for transparent flame-retardant PC in a wide range of applications. Herein, a kind of flame retardant containing sulfonate and phosphazene moieties (HSPP) were synthesized and applied into PC to improve the flame retardancy properties without sacrificing transparency. The results showed that a small amount of HSPP could endow PC with excellent flame retardancy properties. Compared with PC, an improvement with 30.4% in LOI, V-0 rating in UL-94, 25% reduction for THR, and 45% reduction for COY in the cone calorimetry test were achieved when the loading of HSPP in the PC matrix was as low as 0.04 wt %. According to the char morphology and structure analysis, the flame retardancy mechanism was attributed to the synergistic carbonization of sulfonates and phosphazene moieties from HSPP and the enhanced barrier effect of the PC residual char layer with high graphitization and integrity quality. Moreover, the transparency of the PC composite was almost the same as that of pure PC and the mechanical strength and stiffness were also well maintained due to the low-loading of HSPP in PC.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
Materials Today Energy
·
2025
·
IF 8.6
Yongjie Zhu,Ruirui Wang,Yongquan Zhou,Wanxia Ma,Jie Fan,Xiaochuan Deng,Chaoliang Zhu,Aimin Yu,Guowang Xu,Dong-Sheng Li,Chenghua Sun
With the booming development of the new energy industry, the demand for lithium resources has increased dramatically. Adsorption is a green and inexpensive process for lithium extraction from saline lakes but current commercial adsorbents generally have low adsorption capacity and poor stability, and are difficult to be applied to the purification of high-concentration lithium salts. Herein, we report an adsorbent, sulfonate-modified MIL-101(Cr) (MIL-101(Cr)-SO 3 H), for the efficient extraction of lithium from brine and highly concentrated lithium solution. It has high adsorption capacity (118.2 mg g −1 ) on Li + adsorption and fast kinetics (3.5 h to achieve full adsorption equilibrium). Detailed investigations clarify that the adsorption follows the Freundlich model in a spontaneous manner. The adsorption mechanisms of MIL-101(Cr)-SO 3 H for Li⁺ primarily include physical adsorption, chemical adsorption, and functional group adsorption. Such capacity is demonstrated with high durability and selectivity, indicating MIL-101(Cr)-SO 3 H is a promising adsorbent for Li + recycling and extraction.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 136
·期 20
·47539
·
IF 2.188
Ruiyang Chen,Shibin Wang,Xin Shen,Feng Zhao,Jianchun Guo
Ca 2+ tolerance of water-soluble polyacrylamide is a key problem in application fields. It is urgent to make the mechanism of between the polyacrylamide and Ca 2+ clear. A terpolymer polyacrylamides including the sulfonate group with different monomer concentrations is synthesized. The effect of the CaCl 2 concentration on the rheological properties is measured by a rheological rheometer. The zeta potential of the copolymer solution is obtained by a zeta potentiometer to learn about the electrical characteristics of the copolymers in solution. The microcosmic shape of the copolymer aqueous solution is investigated by a laser particle analyzer and an environmental scanning electron microscope. The results show that more sulfonate groups on the molecule can enhance the salt tolerance of the polyacrylamide. Sulfonate groups can weaken the effect of Ca 2+ on the copolymer through the formation of complexes, whereas the self-aggregation process of the copolymer cannot be stopped at high Ca 2+ concentrations. This study provides theoretical guidance to elucidate the influencing rules and mechanism of calcium salt on the polyacrylamide containing a sulfonate group, which can be helpful for polyacrylamide modification and can improve the application of polyacrylamide under the condition of higher salt concentration. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47539.
研究领域:
化学工程
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材料科学
·
石油工程
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2023
·
IF 8.3
Jie Yu,Jo-Shu Chang,Hongliang Guo,Song Han,Duu-Jong Lee
Sulfuric acid modifies the biochar derived from corn cobs, stalks, and reeds. Amongst the modified biochar, corn cobs-biochar has the highest BET (101.6 m 2 g −1 ), followed by reeds-biochars (96.1 m 2 g −1 ). The Na + adsorption capacities for pristine biochars are corn cobs-pristine biochar: 24.2 mg g −1 , corn stalks-pristine biochar: 7.6 mg g −1 , and reeds-pristine biochar: 6.3 mg g −1 , relatively low for field applications. The acid-modified corn cobs biochar has a superior Na + adsorption capacity of up to 221.1 mg g −1 , much higher than literature reports and the other two tested biochars. This corn cobs-modified biochar has also a satisfactory Na + adsorption capacity (193.1 mg g −1 ) from actual water collected from a sodium-contaminated city, Daqing, China. The FT-IR spectroscopy and XPS spectrum reveal that the embedded surface –SO 3 H groups onto the biochar correlate with its superior Na + adsorption, attributable to the ion exchange mechanisms. The biochar surface accessible to sulfonic group grafting can generate a superior Na + adsorbing surface, which is for the first time reported and has great application potential for the remediation of sodium-contaminated water.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
FUEL
·
2019
·
IF 5.128
Tongchao Su,Jie Zeng,Haiyan Gao,Liqun Jiang,Xiuzhi Bai,Haixu Zhou,Feixiang Xu
Magnetic carbonaceous acid catalyst was synthesized from nano-Fe 3 O 4 powder, glucose and hydroxyethyl-sulfonic acid by a novel method of one-pot hydrothermal precipitation-sulfonation. It was found that the prepared C-SO 3 H@Fe 3 O 4 /C catalyst had high acidity (1.23 mmol g −1 ) and strong magnetism (12.85 Am 2 /kg). High yields of glucose (62.59%) and total reducing sugar (73.01%) were achieved from NaOH-freeze pretreated sugarcane bagasse by the C-SO 3 H@Fe 3 O 4 /C catalyst at 180 °C in a microwave reactor. In addition, the C-SO 3 H@Fe 3 O 4 /C catalyst could be easily separated and recovered by an external magnetic force at a high recovery rate (93.18%). High yields of glucose (54.47%) and total reducing sugar (60.65%) were also obtained after experiencing five-time cycles. It was demonstrated as an effective hydrolysis of pretreated sugarcane bagasse to fermentable sugars with high yields by the assistance of the C-SO 3 H@Fe 3 O 4 /C catalyst, and the catalyst exhibited an excellent catalytic stability during the conversion process.
研究领域:
生物化学
·
材料科学
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Chaonan He,Hongyan Wang,Lulu Wang,Song Xue
The utilisation of lithium metal electrodes in high-energy-density rechargeable batteries is impeded by two crucial obstacles: the low mobility and thermal stability of polyolefin separators. Aiming at the structural defects of traditional polyolefin separators, this study proposes a surface functionalization modification strategy based on anionic or cationic surface modified silica nanoparticles. The surface grafting reaction induced by the silane coupling agent has been demonstrated to be an effective method for the construction of sulfonic acid (-SO 3 H) and amino (−NH 2 ) functional groups on the surface of silica nanoparticles. The resultant functionalised nanoparticles (SiO 2 -SO 3 H/SiO 2 -NH 2 ) have been shown to possess ion selectivity. Furthermore, based on the self-polymerization characteristics of dopamine, a uniform polydopamine (PDA) interface layer was constructed on the surface of polypropylene (PP) separator to improve the hydrophilic properties of polyolefin separator. Subsequently, the functionalized ionic silica particles were loaded on the surface of PDA modified PP separator by impregnation method, and the effects of different functional groups on the performance of separator and battery were systematically studied. The results showed that the wettability and flame retardancy of PP separator grafted with -SO 3 H group surpassed those of the pristine PP separator and -NH 2 group modified system. Notably, the -SO 3 H modified separator exhibits exceptional electrolyte absorption (>200 %) and a remarkably low contact angle (12.6°), while concurrently attaining a lithium ion transference number (t Li + ) of up to 0.77. In the LiFePO 4 ||Li battery system, the separator can output a discharge specific capacity of 161 mAh g −1 at 1C rate, which is 12.3 % higher than that of the unmodified PP separator (142.5 mAh g −1 @ 1C, LiFePO 4 ||Li). In addition, the battery assembled by the sulfonic acid-modified separator has a content retention rate of >95 % after 300 cycles, showing excellent rate performance and cycle stability. This synergistic strategy based on interfacial anion and cation functionalization and nanoparticle composite modification provides an innovative technical path for the development of lithium battery separators with high lithium ion migration and thermal safety.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2019
·Vol. 26
·期 9
·1-13
·
IF 1.53
Yang Zhihui,Zang Hu,Wu Guangfeng
A solvent-free waterborne polyurethane was synthesized via one-component crosslinking using N-[(2-amionoethyl)-amino] ethane sulphonated sodium as the post-chain extender. The effects of the N-[(2-amionoethyl)-amino] ethane sulphonated sodium and polyol content on the properties of waterborne polyurethane were investigated. The results indicate that at the optimum post-chain extender (6 mol%) and polyol (15.5 mol%) content, the waterborne polyurethane demonstrated best comprehensive properties. A clear advantage of the approach is that, in contrast with the traditional synthesis technique of waterborne polyurethane, the reaction process did not need any organic solvents to reduce the system viscosity. Also, a more natural optical appearance was obtained by the drying process of waterborne polyurethane itself. The as-developed waterborne polyurethane coating can be extensively used on the artificial leather and synthetic leather surfaces.
研究领域:
材料科学
·
高分子化学
·
绿色化学
·
表面工程
·
皮革化学
✓ 已验证
DOI
高影响因子
ACS Nano
·
2021
·
IF 15.881
Ying Liu,Ziwen Dai,Wang Zhang,Yue Jiang,Jian Peng,Dianlun Wu,Bin Chen,Wei Wei,Xian Chen,Zhenjie Liu,Zhigang Wang,Fei Han,Dahu Ding,Lei Wang,Lina Li,Yingguo Yang,Yang Huang
Polyaniline (PANI) is a promising cathode material for Zn-ion batteries (ZIBs) due to its intrinsic conductivity and redox activity; however, the achievements of PANI in high-performance ZIBs are largely hindered by its instability during the repeated charge/discharge. Taking advantage of the high conductivity, flexibility, and grafting ability together, a surface-engineered Ti3C2Tx MXene is designed as a silver bullet to fight against the deprotonation and swelling/shrinking issues occurring in the redox process of PANI, which are the origins of its instability. Specifically, the sulfonic-group-grafted Ti3C2Tx(S-Ti3C2Tx) continuously provides protons to improve the protonation degree of PANI and maintains the polymer backbone at a locally low pH, which effectively inhibits deprotonation and brings high redox activity along with good reversibility. Meanwhile, the conductive and flexible natures of S-Ti3C2Tx assist the fast redox reaction of PANI and concurrently buffer its corresponding swelling/shrinking. Therefore, the S-Ti3C2Tx-enhanced PANI cathode simultaneously achieves a high discharge capacity of 262 mAh g–1 at 0.5 A g–1, a superior rate capability of 160 mAh g–1 at 15 A g–1, and a good cyclability over 5000 cycles with 100% coulombic efficiency. This work enlightens the development of versatile MXene via surface engineering for advanced batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 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）