CELLULOSE
·
2025
·
IF 4.8
Xin Weiming,Zhang He,Huang Weiwei,Zeng Rong,Gao Xia,Zhou Zuowan
Bamboo, as a renewable and biodegradable polymer resource, is currently used to develop environmentally-friendly polymer materials. However, obtaining bamboo-derived foam materials through sol–gel method encounters challenges in controlling pore structures and foam performance, primarily stemming from weak hydrogen bonding interactions among cellulose, hemicellulose and lignin. In this work, robust bamboo-derived foam materials are developed by freeze-drying all-component bamboo gels. To obtain gels with stable three-dimensional network structure, tannic acid (TA) is used to accelerate the sol–gel transition of the all-component bamboo suspension, by mediating the hydrogen bonding interactions among various biomass components. As a result, the gelation time is reduced from 60 h for the bamboo suspension down to 6 h for the TA/bamboo suspension. After freeze-drying the TA/bamboo gels, foam materials with a low density of ~ 0.08 g/cm 3 and satisfactory thermal insulation can be obtained. Notably the addition of TA not only preserves all components of the bamboo biomass in the foam materials, but also improves the compressive strength of the bamboo-derived foam material by 240% with respect to that pure bamboo foam. This study offers a sustainable and efficient approach for developing high-performance porous materials from all-biomass resources. Graphic abstract
研究领域:
材料科学
·
可再生资源研究
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2019
·
IF 7.149
Cheng Chen,Xiaoying Zhu,Baoliang Chen
One of the most pervasive environmental issues is the frequent oil spills that happen during oil production and transportation processes. This global challenge calls for emerging materials that can effectively separate oil pollutants from water. Here, a facile and feasible method to fabricate a high-performance oil absorbent (ODA-rGO@MF) through the coating of octadecylamine-grafted reduced graphene oxide (ODA-rGO) on the skeleton of commercial melamine foam (MF) is reported. The resultant foam not only possesses the hierarchical pore structure, superior compressibility, and mechanical stability of the original foam but also exhibits high water repellency, superhydrophobicity, and durability under harsh conditions, such as in strongly acidic (alkaline) and salty solutions. The superhydrophobicity of ODA-rGO@MF was created by employing the microarchitecture of MF, forming the rough rGO nanoscale wrinkles on the foam skeletons and further reducing the surface energy by octadecylamine (ODA). These fascinating characteristics make the functionalized foam an excellent oil absorbent with a high absorption capacity (44–111 times its own weight) and extraordinary recyclability. More importantly, the inexpensive materials and low-cost fabrication technique make it possible for large-scale production. Thus, the as-prepared foam has the potential to be used as a promising absorbent for oil-spill cleanups.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Royal Society Open Science
·
2025
·Vol. 12
·期 3
·
IF 2.9
Mingmin Zhang,Xianzhe Xu,Guangyi Jiang,Zhecong Ying,Haiqiao Zhu,Chen Zuo
A foamed sodium carboxymethyl cellulose (CMC) material was prepared under nitric acid conditions. Unlike traditional CMC materials, this foaming method is straightforward and does not require additional foaming agents. Owing to its high stability and load capacity, the foam can realize long-term quantitative storage and load a variety of metal ions; therefore, it has broad application prospects in the field of loaded materials for metal ions. In this work, infrared spectroscopy and nuclear magnetic resonance (NMR) spectroscopy were used to explore the interaction between CMC and nitric acid in the foam under these conditions. The mechanism of foam formation was reasonably explained. Infrared spectra reveal the hydrolysis of the cellulose framework by nitric acid. Based on experimental observations during preparation and NMR analysis, it is explained that nitric acid activates glucose units’ C1 (no. 1 carbon in glucose unit) in CMC, leading to the formation of reducible terminal groups. Additionally, as the concentration of nitric acid increases during solution evaporation, a fraction of these reducible terminal groups undergo oxidation by nitric acid, resulting in gas production and subsequent expansion of the system, ultimately forming a foamed structure upon complete drying.
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
CARBON
·
2019
·
IF 7.466
Jian Huang,ZiQi Zhao,Tiao Chen,Yang Zhu,ZhengHang Lv,Xiao Gong,YunYa Niu,BaoGuo Ma
Expandable graphite (EG) is a common carbon-based fire retardant material. However, its low compatibility and tendency of agglomeration in polymeric material limit its application and potential efficiency. In this paper, polystyrene (PS) was applied as non-covalent compatiblizer for EG to disperse in styrene (St) through suspension polymerization . With appropriate pretreatments of EG and optimization of suspension polymerization conditions, EG was “pulled” and dispersed in oil phase by pre-dissolving PS itself in its monomer . Both glass transition temperature and temperature at maximum weight loss rate of the polymerized EG-PS composite increased, suggesting PS molecules were non-covalently attracted onto EG and confined. The EG-PS foam also maintained well dispersed EG particles, and have a more uniformed foam cell structure than the uncompatibled EG-PS as revealed by microscope and micro-CT. The foam reached V-0 rating in UL94 test. Limited oxidation index (LOI) of the foam increased from 18.2% to 31.3% and flame spreading speed was significantly inhibited to 25 times slower as measured in the test, in comparison to commercial Expandable Polystyrene (EPS). Effective reduction of heat release and suppression of smoke were confirmed by cone calorimeter , comprehensively showing EG as an intercalated graphite material alone could be effective retardant for styrenic foam.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2021
·
IF 3.739
Han Wang,Shulan Wang,Jingqiao Zhang,Han Wang,Hui Li,Yi Zhao
Several mesostructured cellular foams (MCFs) were prepared and modified for NO adsorption. TMB, NH 4 F and n -heptane were used as swelling agents, and APTES was used as the modified agent. The morphological structure, chemical composition, thermostability were tested to study the effects of the preparation process on the characterizations of materials. NO adsorption ability of the materials were studied and discussed. NH 4 F and n -heptane had better pore swelling effects compared to TMB, however adding TMB together with NH 4 F and n -heptane could not enlarge the pore structure further. The MCFs materials could keep steady below 800 °C, but after grafting APTES on the surface of the materials, the thermogravimetric curve of materials began to decrease at 300 °C. The materials using NH 4 F and n -heptane as the swelling agents, and modified by APTES had better NO adsorption ability, and the selectivity of the materials were decided by the molecular polarity of the adsorbates. After the modification, the hydrophobic effect of the samples could increase because of the alkyl groups in APTES. The adsorption capacity of the materials could keep steady for ten times without the coexisting component, H 2 O, CO 2 and SO 2 all had negative effects on the regeneration of the materials.
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
SCIENCE OF THE TOTAL ENVIRONMENT
·
2021
·
IF 7.963
Haonan Duan,Honghong Lyu,Boxiong Shen,Jingya Tian,Xinyu Pu,Fumei Wang,Xudong Wang
Leakage accidents occurring during oil production and transportation are currently one of the most serious environmental problems worldwide. Developing efficient and environmentally friendly oil-water separation methods is the key to solve this problem. In this work, a facile method to fabricate a high-performance oil absorbent through the loading of ball-milled biochar (BMBC) and octadecylamine on the skeleton of melamine foam (MF) is reported. The resulting ball-milled biochar-based MF (BMBC@MF) displayed a complex three-dimensional porous structure. The BM biochar on the surface of BMBC@MF forms nano/μm-scale folds, which reduced the surface energy of BMBC@MF after grafted octadecylamine. These structures resulted in the conversion of the hydrophilic surface of MF to hydrophobic surface. These characteristics made the modified foam an excellent oil absorbent with a high oil absorption capacity (43–155 times its own weight) and extraordinary recyclability . Furthermore, the BMBC@MF could maintain high hydrophobicity and adsorption stability in a wide pH range (from 1 to 11). More importantly, BM biochar is a cheap and readily available material to make BMBC@MF possible for large-scale production. Therefore, this work provides an effective way for low-cost, environmentally friendly, and large-scale production of superhydrophobic adsorbents for oil-water separation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Lian-Kui Wu,Hao Wu,Hui-Bin Zhang,Hua-Zhen Cao,Guang-Ya Hou,Yi-Ping Tang,Guo-Qu Zheng
In this work, graphene oxide (GO) and copper ferrite composite was synthesized on Fe-Ni foam via a one-step hydrothermal method. The foam substrate not only acts as holding material for GO and copper ferrite, but also makes this adsorbent convenient to recycle. The morphology and surface composition of the graphene oxide/copper ferrite foam (GCFF) were analyzed by scanning electron microscopy (SEM), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), and Raman spectra. The adsorption behavior of As(III) and As(V) onto the GCFF was studied as a function of solution pH, temperature, contact time, initial concentrations, and competing ions. Results show this GCFF is an efficient adsorbent for arsenic with high adsorption capacities for both As(III) and As(V) owing to the synergistic effect of CuFe 2 O 4 and GO. The maximum adsorption capacities for As(III) and As(V) are 51.64 and 124.69 mg g −1 , respectively. Adsorption isotherms study indicates a Langmuir model of adsorption. In addition, the GCFF also reveals good recyclability due to the unique foam structure and the adsorption capacity is almost not deteriorated after eight recycles. Column experiment suggests that 96% As(V) can be removed from water solution after 100 bed volume test.
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
ACS Applied Nano Materials
·
2023
·
IF 5.9
Bujin Liu,Jinfu Xing,Tuanhui Jiang,Yujing You,Xiangbu Zeng,Jingkui Yang,Chun Zhang,Wei Gong,Li He
Lightweight plastic foam materials can save resources and energy and reduce environmental pollution. However, these plastic components with large cell sizes present unsatisfactory mechanical properties. Here, we describe a successful strategy to fabricate lightweight and tough polypropylene/nucleating agent (PP/NA) composite foams with high cell density and small cell size by combining designed nanoparticles with intrinsic cavities as nucleating agents and chemical foam injection molding technologies. The influences of nucleating agents with different contents, morphologies, and process parameters on the cell morphology of pure PP and PP/NA foam samples were studied systematically. Owning to the effective increase of the number of nucleation sites by introducing SiO2 nanoparticles with pits on the surface (NAC), the lightweight and tough PP/NAC composite foam that the addition amount of NAC of 1 wt % (PPC1) was prepared with a high cell density of 1.22 × 107 cells/cm3 and a small cell size of 27.99 μm, which enhanced the tensile strength from 21.47 to 24.31 MPa and caused a 356.06% increase in tensile toughness. Furthermore, the effects of packing time on the foaming behavior of PPC1 were studied. When packing time is 5 s, the average cell size is 17.01 μm and the cell density reaches 3.01 × 107 cells/cm3, enhancing the tensile strength to 25.36 MPa and causing a 557.52% increase in the tensile toughness. Therefore, this work provided insights into fabrication of lightweight and tough PP/NA composite foams, which have great promise as structure materials for future use in many applications, such as automotive.
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
Nano Research
·
2021
·Vol. 15
·期 4
·2961-2970
·
IF 8.897
Hu Qian,Xu Licong,Fu Kaixing,Zhu Feichao,Yang Taoyu,Yang Tao,Luo Jinming,Wu Minghua,Yu Deyou
Metal-organic frameworks (MOFs) are attractive for promising applications but plagued by difficult recovery and deployment due to their intrinsic nano/micro powder nature. Although significant efforts have been made to develop separable solid matrixes for MOF supporting, the poor loading stability and durability of MOFs still challenge their engineering applications. Here, we present a facile and effective approach to fabricate MOF-based melamine foams (MFs) (denoted as MOFiths) with ultrahigh loading stability and operation stability, easy separation, and high-efficient performance for versatile robust applications. By adopting our approach, numbers of typical fragile MOFs characterized with wide ranges of particle size (from ∼ nm to ∼ µm) can be precisely incorporated into MFs with controllable loading ratios (up to ∼ 1,600%). Particularly, the produced MOFiths show excellent capacities for the highly effective and durable water purifications and acetalization reactions. 100% of organic pollutants can be rapidly destructed within 10 min by MOFiths initiated Fenton or catalytic ozonation processes under five successive cycles while the maximum adsorption capacity of MOFiths toward Pb(II), Cd(II), and Cu(II) reaches to 422, 222, and 105 mg·g −1 , respectively. This study provides a critical solution to substantially facilitate the engineering applications of MOFs for long-term use in practice.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2024
·
IF 6.3
Ruiyang Cheng,Hao Chen,Yuhan Chen,Chunhui Shen,Shanjun Gao
In this study, a phosphorus-nitrogen flame retardant (DOPO-DABP) was synthesized by 9,10-Dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and 4,4′-diaminobenzophenone (DABP). Then, polylactic acid (PLA), polybutylene adipate terephthalate (PBAT), ammonium polyphosphate (APP), DOPO-DABP, Joncryl ADR-4370F(ADR), azodicarbonamide (ADC) and nano-SiO 2 were used as raw materials to prepare flame-retardant modified PLA foamed materials by hot pressing. The synergistic effect of APP and DOPO-DABP not only effectively improves the flame retardancy of PLA foamed material, but also promotes their mechanical properties. The experimental results showed that when APP/DOPO-DABP=10/10, the vertical combustion grade (UL-94) of the material reached the V-0 level, the limiting oxygen index (LOI) was 34.4 %. The tensile strength of the material was 25.35 MPa, bending strength was 32.14 MPa. The cell diameter of the material was reduced to 46.72 μm, and the cell density of the material was 2.25×10 6 /cm 3 .
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 Materials & Interfaces
·
2017
·
IF 7.504
Shiming Zhang,Dingguan Wang,Qianhao Pan,Qinyuan Gui,Shenglong Liao,Yapei Wang
Solid materials for CO2 capture and storage have attracted enormous attention for gaseous separation, environmental protection, and climate governance. However, their preparation and recovery meet the problems of high energy and financial cost. Herein, a controllable CO2 capture and storage process is accomplished in an emulsion-templated polymer foam, in which CO2 is breathed-in under dark and breathed-out under light illumination. Such a process is likely to become a relay of natural CO2 capture by plants that on the contrary breathe out CO2 at night. Recyclable CO2 capture at room temperature and release under light irradiation guarantee its convenient and cost-effective regeneration in industry. Furthermore, CO2 mixed with CH4 is successfully separated through this reversible breathing in and out system, which offers great promise for CO2 enrichment and practical methane purification.
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
ACS Nano
·
2022
·
IF 18.027
Lu Chen,Siheng Wang,Shanshan Wang,Chang Chen,Luhe Qi,Le Yu,Ziyang Lu,Jing Huang,Junqing Chen,Zhen Wang,Xiao-Wen Shi,Zhanqian Song,He Liu,Chaoji Chen
Heavy reliance on petrochemical-based plastic foams in both industry and society has led to severe plastic pollution (the so-called “white pollution”). In this work, we develop a biodegradable, recyclable, and sustainable cellulose/bentonite (Cel/BT) foam material directly from resource-abundant natural materials (i.e., lignocellulosic biomass and minerals) via ambient drying. The strong resistance to the capillary force-driven structural collapse of the preformed three-dimensional (3D) network during the ambient drying process can be ascribed to the purpose-designed cellulose–bentonite coordination interaction, which provides a practical way for the locally scalable production of foam materials with designed shapes without complex processing and intensive energy consumption. Benefiting from the strong cellulose–bentonite coordination interaction, the Cel/BT foam material demonstrates high mechanical strength and outstanding thermal stability, outperforming commercial plastic polystyrene foam. Furthermore, the Cel/BT foam presents environmental impacts much lower than those of petrochemical-based plastic foams as it can be 100% recycled in a closed-loop recycling process and easily biodegraded in the environment (natural cellulose goes back to the carbon cycle, and bentonite minerals return to the geological cycle). This study demonstrates an energy-efficient ambient drying approach for the local and scalable production of an all-natural cellulose/bentonite foam for sustainable packaging, buildings, and beyond, presenting great potential in response to “white pollution” and resource shortage.
研究领域:
材料科学
·
环境科学
·
生物工程
✓ 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）