CHEMICAL ENGINEERING JOURNAL
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2019
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IF 8.355
Xinhai Zhang,Wei Li,Pengyu Song,Bo You,Gang Sun
Polymer-based aerogels have many uses because they possess excellent mechanical properties, such as high moduli and remarkable fatigue resistances. Freeze drying is an appealing aerogel preparation method because it is simple, green and inexpensive. However, polymer-based aerogels prepared by freeze drying always exhibit inferior mechanical properties compared to those prepared by classic supercritical drying, even if the raw material is polyimide . Herein, we report a novel double-cross-linking strategy to obtain a freeze-dried and robust polyimide/reduce graphene oxide/cobalt (PI/rGO/Co) aerogel with an interdigitated cellular architecture. The double-cross-linking strategy was attributed to hydrogen bonds derived from the graphene oxide (GO sheets) and coordination interactions from the Co ions. The interdigitated cellular architecture is the critical factor for achieving aerogels with low densities, flexibilities, high moduli (0.506 MPa compression modulus, 43% improvement of tensile modulus), and high fatigue resistances (1000 cycles). The as-prepared aerogel could be modified to achieve hydrophobicity with a 146.1° water contact angle. It was also difficult to be ignited and it exhibited excellent heat stability and low thermal conductivities (0.040 W·m −1 ·K −1 at 25 °C; 0.046 W·m −1 ·K −1 at 100 °C).
研究领域:
材料科学
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化学工程
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DOI
高影响因子
ADVANCED MATERIALS
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2013
·Vol. 25
·期 21
·2980-2983
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IF 14.829
Ye Tian,Yewen Cao,Yu Wang,Wuli Yang,Jiachun Feng
Graphical Covalently crosslinked graphene oxide papers (GOPs) with enhanced mechanical properties are prepared by a strategy involving crosslinking by means of intercalated polymers. The strength and modulus of the crosslinked GOPs increase by 115% and 550%, respectively, compared to the pristine GOPs. These results broaden the potential applications of graphene, and the crosslinking strategy will open the door to the assembly of other nanometer-scale materials.
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
PubMed
高影响因子
Journal of Energy Chemistry
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2025
·
IF 14.9
Zhongyu Liu,Xiu Huang,Yuchen Zhao,Jianwei Wang,Jiaying Liu,Chenyu Zhou,Hongwei Wang,Tian Cui,Xiaohui Liu
Inorganic CsPbI 3 perovskite with superior thermal stability and photoelectric properties has developed into a promising candidate for photovoltaic applications. Nevertheless, the power conversion efficiency (PCE) of CsPbI 3 perovskite solar cells (PSCs) still lags far behind that of both organic-inorganic hybrid counterparts and the theoretical PCE limit, primarily restricted by severe fill factor (FF) and open-circuit voltage ( V OC ) deficits. Herein, an in-situ self-crosslinking strategy is proposed to construct high-performance inverted inorganic PSCs by incorporating acrylate monomers as additives into CsPbI 3 perovskite precursors. During the thermal annealing process of perovskite films, acrylate monomers can form network structures by breaking the C=C groups through an in-situ polymerization reaction, mainly anchored at the grain boundaries (GBs) and on the surfaces of perovskite. Meanwhile, the C=O groups of acrylate polymers can favorably coordinate with uncoordinated Pb 2+ , thereby decreasing defect density and stabilizing the perovskite phase. Particularly, with multiple crosslinking and passivation sites, the incorporation of dipentaerythritol pentaacrylate (DPHA) can effectively improve the perovskite film quality, suppress nonradiative recombination, and block moisture erosion. Consequently, the DPHA-based PSC achieves a champion PCE of 20.05% with a record-high FF of 85.05%, both of which rank among the top in the performance of inverted CsPbI 3 PSCs. Moreover, the unencapsulated DPHA-based device exhibits negligible hysteresis, remarkably improved long-term storage, and operational stability. This work offers a facile and useful strategy to simultaneously promote the efficiency and device stability of inverted inorganic PSCs.
研究领域:
材料科学
·
光伏技术
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zhihang Xu,Jian Du,Peng Shan,Yilin Wang,Leping Li,Yehan Tao,Jinwen Hu,Chenglong Fu,Yanna Lv,Zhenglei Jia,Xunyu Song,Haisong Wang
Polysaccharide-based active packaging materials have extensively explored in the field of food safety, whereas the highly hydrophilic traditional biopolymer was susceptible to be broken under moisture conditions, leading to the invalid food preservation. Herein, a multi-mechanism cross-linking densification strategy was employed to design and construct novel carboxymethyl chitosan (CMCS)/sodium alginate-dopamine complex (SD)/oxidized starch (OS)/tea polyphenol (TP) composite film (COSDT) composite. Multiple cross-linking reduces the spacing between polysaccharide chains to make the structure denser, hindering the adsorption and penetration of water molecules. The optimized COSDT-2 film maintains intact structures without any dissolution after immersing in water for 24 h and demonstrated relatively stable water contact angle of 71.97° at 1 s and 68.48° after 60 s. The water vapor permeability and oxygen transmission rate were reduced from 5.10 × 10 −7 g m −1 s −1 Pa −1 and 8.28 cm 3 μm (m 2 day KPa) −1 for COT sample to 1.03 × 10 −7 g·m −1 ·s −1 ·Pa −1 and 2.70 cm 3 μm (m 2 day KPa) −1 for COSDT-2 film. Moreover, COSDT films exhibited stable wet mechanical properties in high-humidity environments (95 % RH) of 30.76 MPa. COSDT-2 accelerated the release of tea polyphenols by structural loosening due to enhanced interchain repulsion under alkaline conditions, resulting in a significant reduction of volatile alkaline nitrogen production by 61.58 % in chicken breast meat and prolonged shelf life. This study provided a novel perspective in designing and constructing water-resistant active food packaging biofilms through modulating the interchain spacing of polymers.
研究领域:
食品科学
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生物材料
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包装工程
✓ 已验证
产品关联
DOI
高影响因子
FOOD HYDROCOLLOIDS
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2024
·
IF 11
Huijie Yang,Zhihang Xu,Leping Li,Chao Li,Yehan Tao,Jie Lu,Jinwen Hu,Xiaodong Xia,Mingqian Tan,Jian Du,Haisong Wang
Cinnamon essential oil (CEO) has been extensively employed as active compound in the active packaging film for food preservation, whereas its volatilization during the fabrication process restricted the loading and preservation effect. Herein, the multiple cross-linking strategy was proposed to design and construct the novel sodium carboxymethyl cellulose (CMC)/cellulose nanofiber-cinnamon essential oil (CNF-CEO)/citric acid (CA) (CCEA) film. Experimental characterization revealed that the multiple intermolecular crosslinks ( e.g. hydrogen bond and ester bond etc. ) within the polymer network reinforced the network and enabled the film to reduce the thermal movement of the molecular chains, which in turn prevented the CEO volatilization during processing. The optimized CCE 0.2 A 0.2 with the mass ratio of 2:0.5:0.2:0.2 (g/g/g/g) possessed the highest CEO retention of 65.7%, which was much higher than the CCE 0.2 A 0 of 11.71%. The oxygen, moisture barrier and tensile strength were improved from 8.94 cm 3 μm/(m 2 · day · KPa), 1412.34 g m −2 · 24 h −1 and 10.55 MPa for CCE 0.2 A 0 film to 2.01 cm 3 μm/(m 2 · day · KPa), 1296.93 g m −2 · 24 h −1 and 25.93 MPa for CCE 0.2 A 0.2 , respectively. CCE 0.2 A 0.2 also presented well antimicrobial activity and antioxidation capacity (67.25%). When employed as packaging film, the CCE 0.2 A 0.2 film can effectively prolong the freshness of shrimp in refrigeration for 7 days. Our findings provided a novel perspective to suppress the volatilization of CEO during fabrication for effective food preservation.
研究领域:
食品科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Ning Zhang,Yingmei Meng,Zhiying Li,Chuanlong Jin,Junjiang Bao,Xiaopeng Zhang,Gaohong He
High free-volume microporous membranes constructed by intrinsically microporous polymers (PIMs) are up-and-coming in efficient carbon capture, but their practical applications are limited by plasticization and physical aging issues. This work we proposed a CO 2 -solution-compensated cross-linking strategy to construct microporous membranes with both crosslinking network and enhanced CO 2 solubility via the Hoffmann alkylation reaction between the bromomethylated PIM matrix and Ethylenediamine (EDA) only at 80 °C. The enhanced CO 2 solubility could compensate the reduced CO 2 diffusion by the crosslinking network. Accordingly, the crosslinked microporous membranes with CO 2 -solubility compensation achieved a superior decarbonization from natrual gas (CO 2 permeability of 898.9 Barrer, CO 2 /CH 4 separation factors of 204.1) surpassing the 2019 Robeson upper and excellent anti-plasticization (plasticizing pressure up to 0.8 MPa) and anti-aging (CO 2 permeability loss < 10 % after 30 days) performance. The CO 2 -solubility-compensation crosslinking strategy will promote the development of high-performance microporous membrane for efficient decarbonization.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2019
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IF 3.571
Yang Qin,Jinpeng Wang,Chao Qiu,Xueming Xu,Zhengyu Jin
Most conventional synthetic hydrogels suffer from poor mechanical properties; despite recent significant progress in fabricating tough hydrogels, it is still a challenge to simultaneously realize high stretchability, self-recovery, and self-healing capability in a hydrogel. In this work, a new type of starch/PVA/borax hybrid dual cross-linked (DC) hydrogel was synthesized by a one-pot method. The as-prepared DC hydrogels exhibited mechanical properties of remarkable extensibility (ca. 2485%), excellent toughness (ca. 290.5 kJ m–3), high compression strength (ca. 547.8 kPa), rapid recoverability (81.9% energy recovery after 30 min), and free-shapeable behavior. More impressively, the DC gels sustained approximately 300 times their own weight and exhibited an outstanding self-healing capability at room temperature both in air and underwater. Furthermore, the adsorption amount of methylene blue onto the anionic DC gel (144.68 mg/g) was much higher than that of corn starch gel. Consequently, the eco-friendly, stable, and biodegradable hydrogels will have a great potential application in removing anionic dyes from the wastewater produced by agriculture and industry.
研究领域:
材料科学
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环境科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
Applied Materials Today
·
2025
·
IF 6.9
Jiasheng Wei,Di Li,Qing Luo,Peiyu Zhao,Ping He,Shufan Wang,Yu Meng,Shuangquan Yao,Hao Jia,Lei Dai
Amid the global drive towards green development, biomass aerogels have garnered significant attention in the domain of electromagnetic interference (EMI) shielding materials due to their abundant sources, high porosity, and large specific surface area. Nevertheless, the development of an easy-to-operate and eco-friendly method for large-scale production of biomass aerogels remains a formidable challenge. Herein, a dual crosslinking system assisted ambient pressure drying strategy is proposed to fabricate biomass EMI shielding aerogels without specialized conditions and equipment. Specifically, TEMPO-oxidized cellulose nanofiber (TOCNF) combines with cationic guar gum (CGG) and Fe 3+ to form a double crosslinked network through the electrostatic interaction and ionic bonding, yielding hydrogels that encapsulate carbon nanotube (CNT). The resulting hydrogels were sequentially subjected to freeze-thaw cycles, solvent replacement and ambient pressure drying to obtain TOCNF/CGG/Fe 3+ /CNT (TCFC) aerogel. The TCFC aerogel delivered good EMI shielding effectiveness (EMI SE) of 62.65 dB at a density of 0.1071 g cm −3 with the SSE (SE/density) of 584.98 dB cm 3 g −1 . Moreover, the incorporation of polydimethylsiloxane further protects the aerogels in complex environments to maintain their EMI shielding performance. This work provides a novel strategy for the construction of ambient-pressure-dried biomass aerogels, potentially inspiring new directions in the development of EMI shielding aerogels.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Meiying Ge,Jia-Tao Miao,Guozheng Liang,Aijuan Gu
Developing superior heat resistant biobased thermosetting resins is an interesting challenge. Herein, a novel tetra-functional biobased epoxy monomer with phenylpropargyl ether groups (BPBMO) was synthesized, which was then cured with 4,4′-diaminodiphenylmethane (DDM) to produce a biobased resin (BPBMO/DDM), the aggregation structure and integrated properties of BPBMO/DDM were systematically researched and compared with those of commercial petroleum-based DGEBA/DDM. Glass transition temperature ( T g ) of BPBMO/DDM is as high as 407 °C, which is not only about 207 °C higher than that of DGEBA/DDM, but also the highest value among all biobased epoxy resins reported. Besides, BPBMO/DDM resin shows higher flame retardance with lower peak heat release rate (pHRR), total heat release (THR) and total smoke production (TSP) than those of DGEBA/DDM. These outstanding performances were beneficial from the unique structure of BPBMO/DDM formed with the ring open reaction between epoxy and amino groups as well as the post-crosslinking of phenylpropargyl ether groups. This work proposes an effective post-crosslinking strategy from the molecular structural design to construct an ultrahigh heat resistant biobased epoxy resin with good flame retardancy.
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
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Yuluo Chen,Zhenglin Song,Huicong Liu,Hang Xu,Yuchun Xi,Chuanqiang Yin,Xiaomin Li,Lei Ma,Puxuan Yan,Lang Zhou
Electrospun polyimide (PI) nanofiber membranes have served as promising separators for safe lithium-ion batteries (LIBs) due to their excellent thermal stability. However, electrospun PI nanofiber membranes have excessively large pores and low mechanical strength, which have been shown to be unsuitable for direct utilization as LIB separators. To solve these issues, we proposed a novel electrospun PI nanofiber membrane obtained using a triple cross-linking strategy, including precalendering, microsolvent dissolution, and chemical imidization. The precalendering process, as a prerequisite, densified the poly(amic acid) (PAA) nanofiber membrane and followed by microsolvent dissolution and chemical imidization, which provided synergistic cross-linking effects. This resulted in a mutual anchoring effect of the ultralong molecular chains at the cross-linking interface, forming a robust cross-linking structure and efficient imidization transition. As a result, the mechanical properties of the samples significantly improved, while the tensile strength increased from 9.9 to 95.5 MPa. Furthermore, as the pressing degree of the membranes increased, the electrolyte uptake, ionic conductivity, and capacity decreased; however, the ability to inhibit lithium dendrite growth and uniformly produce solid electrolyte interfaces (SEIs) increased. Compared to the noncross-linked PI membrane, the PI membrane obtained using the triple cross-linking strategy had a stable interface with the lithium metal electrodes and a high-capacity retention rate. This robust PI nanofiber membrane could serve as a promising replacement for traditional polyolefin separators in high-performance LIBs.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Bowen Zheng,Chengwei Deng,Ruoyin Luo,Shaojie Gao,Feng Ji,Dong Wang
To simultaneously increase the mechanical strength and proton conductivity of Phosphoric acid-doped polybenzimidazole (PA-PBI), a facile two-step crosslinking approach is proposed to prepare the imidazole-rich crosslinked polybenzimidazole membranes for high-temperature proton exchange membrane fuel cells (HT-PEMFCs) in this work. Unlike the classic crosslinking approaches that usually enhance mechanical strength of membrane but lead to a decrease of proton conductivity, the mechanical strength of two-step crosslinked membrane improves from 3.93 MPa to 9.62 MPa and proton conductivity increases from 91 mS cm −1 to 183 mS cm −1 at 200 °C compared with pristine OPBI membrane. The promotion should be ascribed to the introduction of PA-affinity sites on crosslinkers and the formation of homogeneous crosslinking networks. Meanwhile, due to the crosslinked networks, the oxidative and dimensional stability of crosslinked membranes are also promoted. In addition, the two-step cross-linking method can avoid the self-reaction between cross-linking agents, thereby obtaining a more uniform cross-linking network, which is of great significance for the use of fuel cells. When the membranes are used in a fuel cells, they exhibited a maximum power density of 448.8 mW cm −2 at 160 °C (H 2 /Air, without humidification.).
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Tian Linfeng,Tan Li,Yang Rui,Zhang Tianchen,Zhao Baozheng,Song Fei,Pan Zheng,Zhou Yonghong,Zhang Meng
Due to increasing economic and environmental constraints, the development of renewable-source polymers as alternatives to conventional petroleum-based polymers has become a critical challenge in materials science. Vegetable oils, particularly soybean oil (SO), have emerged as promising renewable resources owing to their abundance, cost-effectiveness, and ease of chemical modification. In this study, a novel polyurethane was synthesized through the combination of SO, diethanolamine (DEA), dicyclohexylmethane 4,4′-diisocyanate (HMDI), and bis(2-hydroxyethyl) disulfide (HEDS). The incorporation of HEDS as a cross-linking agent facilitated the formation of a cross-linked network structure during the chemical cross-linking pre-polymerization reaction of the polyurethane main chain. The resulting polyurethane adhesive demonstrated remarkable rebonding capability, maintaining good bond strength through up to nine rebonding cycles, and exhibited exceptional shear strength of 7 MPa. Furthermore, the adhesive-coated substrates maintained substantial shear strength after 24-h immersion in various pH solutions, indicating excellent chemical stability. The integration of carbon nanotubes (CNTs) with the block copolymer using ultrasonic cell disruption techniques enhanced the material’s electrical conductivity, thereby expanding its potential applications in non-destructive testing of adhesive sizing processes, particularly in aerospace applications. This innovative material offers a supplementary approach to the existing methodologies for detecting adhesive sizing conformance, potentially enhancing quality control in advanced manufacturing processes. The development of this soybean oil-based polyurethane represents a significant advancement in sustainable adhesive technology, offering both environmental benefits and superior mechanical properties compared to traditional petroleum-based adhesives. The incorporation of CNTs not only improves electrical conductivity but also potentially enhances the mechanical strength and thermal stability of the composite material, making it suitable for demanding industrial applications. Graphical abstract The polyurethane adhesive presented in this paper is an adhesive prepared from soybean oil by ammonolysis, esterification and other steps, and heat curing, and the self-repairing and repeat bonding properties of the adhesive are improved by changing the type of chain extender. This bi-dynamic polyurethane adhesive has good water and acid resistance and can be recycled. Shear strength of up to 7 Mpa allows this adhesive to be used in extreme environments for glues, such as humid, acidic and alkaline environments. The carbon nanotube composite adhesive also showed good adhesive and conductive properties, and two methods for testing the conformity of the adhesive sizing process (i.e., non-destructive testing) are presented. In conclusion, this study provides a reference for the development of soybean oil-derived multifunctional adhesives, which is of great significance in promoting the practical application of novel bio-based adhesives.
研究领域:
材料科学
·
可持续化学
·
粘合剂技术
✓ 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）