Polymers
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2017
·Vol. 9
·期 8
·323
·
IF 3.364
Xin-yu Song,Meng Wang,Yun-xuan Weng,Zhi-gang Huang
Bamboo flour (BF) was grafted onto lactide (LA) in the molten state using stannous octoate as a catalyst to form BF-g-LA. Then, polylactic acid (PLA) was blended with BF (PLA/BF, 85/15 wt %) to prepare PLA/BF/BF-g-LA composites using BF-g-LA as a compatibilizer. The grafting rate of BF was characterized using infrared testing and elemental analysis. To investigate the effect of BF-g-LA on the performance of PLA/BF/BF-g-LA composites, the phase morphology, thermal stability, and mechanical properties of the composites were characterized using scanning electron microscopy, thermogravimetric analysis, and universal material testing, respectively. The addition of BF-g-LA improved the interface compatibility between PLA and BF. When the BF-g-LA content was 2 phr, the tensile and impact strengths of PLA/BF/BF-g-LA composites were 55.3 MPa and 9.56 kJ/m2, representing 30% and 27% increases, respectively, relative to corresponding values for PLA/BF composites.Keywords:bamboo flour;lactide;graft;polylactic acid;compatibility
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Biomass Conversion and Biorefinery
·
2023
·
IF 4
Ye Haiyang,Yu Kun,Li Bing,Guo Jianzhong
Heavy metal pollution and organic wastewater treatment have attracted extensive attention of researchers. Adsorption method is widely used in wastewater treatment because of its low price and high efficiency. As a natural, cheap biomass material, bamboo powder is of great significance to develop it into an economical and efficient biochar for wastewater treatment. A new type of ball-milled biochar (BMBC) adsorbent was prepared by pyrolysis of bamboo powder under an inert atmosphere, activated with sodium hydroxide solution and ball milling. The specific surface area of BMBC increased from 29.21 to 60.49 m 2 /g, and the carboxyl and hydroxyl groups on the pyrolyzed carbon surface also obviously increased after ball milling. The results of bath adsorption experiments showed that BMBC exhibited excellent adsorption capacity towards both Pb(II) (170.52 mg/g) and methylene blue (MB, 419.11 mg/g) at 308 K. Based on a systematic study on the effect of various working conditions (including concentration, temperature, pH value, and ionic strength), it was demonstrated that pseudo-second-order kinetic equation might match the adsorption process ( R 2 > 0.9934) and Langmuir model ( R 2 > 0.9924); adsorptions were thermodynamically endothermic and occurred spontaneously. The ball milled alkalization-modified bamboo biochar can potentially be applied to remove heavy metal and cationic pollutants from wastewater.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Dong Wu,Hao li,Guangxing Pan,Mi Wang,Wen Yu,Gui-Gen Wang,Jiaheng Zhang
Water pollution from organic oily solvents and dyes is a major global problem. While some wettable materials exist for oily pollutants, few can effectively separate different oil–water emulsions and dyes. To address this problem, we developed a smart citric acid-crosslinked bamboo powder-coated membrane (CBM) with approprite surface roughness and switchable wettability. The CBM membrane is superhydrophobic in oil and superoleophobic in water, making it highly effective in separating oil–water emulsions and dyes. The membrane can efficiently separate various oil–water emulsions, including crude oil-in-water emulsions, with a separation efficiency of 99.76 % and a high flux of 1756 L/m 2 /h. It also adsorbs anionic (e.g. Congo red) and cationic (e.g. methylene blue) dyes in wastewater, with an adsorption rate of 99.45 % after multiple cycles. The membrane can simultaneously separate oil-in-water emulsions and remove dyes from water, facilitating high-value utilization of biomass waste and offering great promise for addressing global water pollution from oily organic solvents and dyes.
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
POLYMER COMPOSITES
·
2025
·
IF 4.7
Jiawei Wei,Fang Wang,Ruru Liu,Xiangying Chen,Zhongjie Zhang
Based on the micro-structure of wollastonite (WS) and bamboo flour (BF), a series of PP/WS/BF ternary composite materials are prepared using blending, twin-screw melt extrusion, and injection molding processes. The experiment shows that the formulation and processing technology play a significant impact on the structure, thermal, and mechanical properties of the composites. BF has a significant impact on the nucleation and crystallization of PP, while WS has almost no effect on PP. BF improves tensile strength and enhances the strength of composites; WS improves the bending strength and flexural modulus and enhances the rigidity of composites. Taking the W-B-30-1:3 sample as an example, its tensile performance is the highest at 23.33 MPa, as well as bending strength and flexural modulus of 26.23 and 904.67 MPa, respectively. The combination of BF and WS leads to an increase in storage modulus, a decrease in loss modulus, a decrease in loss factor, an increase in glass transition temperature, and a decrease in bonding factor of ternary composite materials. This work can enrich the scope of PP composite materials, and the composite materials are expected to have potential applications in the fields of automotive interior parts with lightweight. Highlights Heterogeneous bonding among fillers enhances crystallization of composites. Wollastonite is more conducive to improving the thermal stability of composites. Adding fillers can more effectively enhance mechanical properties. The use of fillers increases interfacial compatibility and bonding performance.
研究领域:
材料科学
·
复合材料工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER TESTING
·
2014
·
IF 1.816
Ya-nan Wang,Yun-xuan Weng,Lei Wang
The applicability of bamboo flour (BF) blended with polylactic acid (PLA) to improve the properties of PLA for widespread use as an environmentally friendly, biodegradable polymer is limited by the poor compatibility of these materials. Therefore, as a potential compatibilizer for PLA/BF composites, PLA-g-glycidyl methacrylate (GMA) was synthesized by grafting GMA onto PLA using benzoyl peroxide and tert-butyl peroxy benzoate as initiators. GMA grafting onto PLA was confirmed by infrared testing and elemental analysis . Then, PLA/BF biocomposites were prepared by blending PLA (85 wt%) and BF (15 wt%) with different concentrations of PLA-g-GMA. The phase morphology, thermal stability and mechanical properties of the composites prepared with PLA-g-GMA were improved over those of PLA/BF composites without compatibilizer, as characterized by scanning electron microscopy, thermogravimetric analysis and using a universal materials tester, respectively. Specifically, the thermal decomposition temperature , tensile strength and tensile modulus of PLA/BF biocomposites prepared with 15 hpr PLA-g-GMA were increased.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2021
·
IF 9.642
Hao-Zhe Li,Yu-Nan Zhang,Jian-Zhong Guo,Jian-Quan Lv,Wei-Wei Huan,Bing Li
Polyvinyl chloride (PVC) was blended into bamboo powder during co-hydrothermal carbonization (Co-HTC) to understand the effects on the physicochemical properties and adsorbing ability of hydrochar. The properties of hydrochar were characterized by Zeta potential, elemental analyses, BET, FTIR, XPS, Boehm titration and SEM. The addition of PVC into bamboo in Co-HTC decreased the BET area, and pore volume and radius of hydrochar, but increased the contents of surface hydroxyl and carboxyl groups. The adsorption ability of hydrochar produced by addition of PVC at 473 K over methylene blue (MB) increased significantly. The main adsorption mechanism was electrostatic attraction by –N(CH 3 ) 2 + of MB and carboxylate of hydrochar, and hydrogen-bonding interaction through N atom of phenothiazine in MB and C–OH of hydrochar. Thus, Co-HTC offers a facile, green and economical alternative for conversion of waste into high-value adsorbents.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Qian Xiang,Yan Liu,Bo Wang,Chengyi Huang,Lilin Wang,Jinsong He,Dong Tian,Fei Shen,Yanzong Zhang
To realize efficient treatment of oily wastewater, various super-wetting materials have been developed. Oily wastewater is often complex and may contain both oil-in-water and water-in-oil emulsions. However, most of the current studies focus on the treatment of single emulsions, and there are fewer studies on the simultaneous separation of oil-in-water and water-in-oil emulsions. In this paper, by removing hemicellulose and lignin from bamboo processing waste powder (BPWP), the treated bamboo powder (TBP) containing mainly cellulose was obtained. TBP has superoleophobicity underwater and superhydrophilicity underoil, which can separate not only various oil-in-water emulsions stabilized by surfactants, but also water-in-oil emulsions stabilized by different surfactants, and the separation efficiency is higher than 99 %. The separation efficiencies of TBP for different water-in-oil emulsions were all higher than 99 %. On this basis, we have established an intelligent device that makes full use of underwater super-hydrophobic and under-oil super-hydrophilic properties to realize the purification of water and de-watering and recycling of floating oil in complex oil-water systems. This work provides a very promising direction for industrial application in practical oily wastewater treatment and fuel recovery.
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
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Lan Cui,Mingrui Pan,Yu Zhou,Haiyan Xu,Liping Ning,Shanshan Jia,Xiaohui Wang,Zhiping Su
Environmental pollution caused by nondegradable fossil-based plastics is one of the biggest global concerns. Bamboo, which is a renewable and biodegradable biomass resource, is a promising material for developing green plastic substitutes. However, the processing (e.g., thermal processing) of bamboo into plastic substitutes remains a considerable challenge because bamboo is a stable multicomponent structure crosslinked via strong hydrogen bond (H-bond) and covalent-bond interactions, which results in its non-thermoplastic characteristic. Herein, bamboo powders (BPs) were integrated into polyimine (PI) covalent adaptable networks (CANs) using a simple heat-pressing approach, which helped us successfully fabricate a thermally processable composite film (BP/PI). The heat-driven dynamic network exchange characteristic of PI also provides BP/PI with excellent reshaping, rehealing, and remolding capabilities. The multiple H-bond interactions between BPs and PI provide BP/PI with excellent tensile strength (45.2 MPa) and flexural strength (121.9 MPa). BP/PI also exhibits remarkable water and organic solvent resistance, chemical degradability, closed-loop recyclability, and biodegradability. This attractive BP/PI material represents a high-performance and ecofriendly plastic substitute.
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
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Boxiang Zhan,Long Zhang,Yongqi Deng,Minghui Fan,Lifeng Yan
Green adhesives with roborant performance are still a challenge. Here, we prepare a sustainable adhesive directly from biomass-based lignin and furfural in green deep eutectic solvent (DES, ChCl/urea), and then composite materials have been prepared by mixing the as-prepared adhesives with various kinds of biomass powder following a hot-pressing process. The composite material made from bamboo powder shows excellent multifunctional properties. The bending strength reaches 46.06 MPa while the bending modulus even exceeds 10 GPa, and it also has a super high internal bonding strength of 4.54 MPa. The composite also has excellent flame-retardant properties, with a flame-retardant grade of V0. In addition, the LCA-MB has high heat insulation, water resistance, thermal stability, and mildew resistance. In addition, the composite is not only biodegradable but also extremely low-cost, which is much cheaper than most petroleum-based plastics.
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
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Zijun Zhang,Xinyue Yao,Yan Xu,Haining Na,Chao Fang,Zhu Jin
The synthesis of monomers with two epoxy structures (EIA) was successfully achieved by adopting holo-biobased feedstocks and in situ solvolysis reaction. The molecular structure of EIA was subjected to characterization through the use of infrared spectroscopy (IR), mass spectrometry (MS), and nuclear magnetic resonance hydrogen spectroscopy ( 1 H NMR). The EIA was employed as the epoxy monomers for the synthesis of the grafted compatibilizer, resulting in the successful preparation of a fully bio-based and high epoxy value grafted compatibilizer (PLA-g-EIA (PLE)). The effects of varying proportions of the monomer (EIA) and Bis(tert-butylperoxy-1-methylethyl)-benzene (BIBP) on the dynamic grafting reaction were investigated systematically using IR, 1 H NMR, melt flow index (MFR), and differential scanning calorimetry (DSC). Furthermore, the compatible effects of PLE on the mechanical performances, rheological properties, and microstructure of bamboo powder (BP) enhanced PLA composites were also investigated. Furthermore, a series of comparisons were conducted between PLE and a homemade PLG under identical conditions. The grafting degree (GD) of PLE reached 1.28 % under identical conditions (monomer mass addition of 3 %, monomer: initiator mass ratio of 20:3), whereas the GD of homemade PLA-g-GMA (PLG) was only 0.82 %. In comparison to PLG with varying contents, the prepared PLE markedly augmented the interfacial adhesion between two phases, thereby promoting an enhancement of impact, tensile, and flexural strength. Furthermore, the presence of PLE (5 wt%) enhanced the impact strength by up to 37 %, tensile strength by up to 3.03 MPa, and flexural strength by up to 6.16 MPa of PLA/BP composites compared to the absence of the compatibilizers. Meanwhile, PLE (5 wt%) was 1.68, 2.16, and 2.02 times more effective than PLG in enhancing the notch impact, tensile, and bending strength of composites, respectively.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Jinlong Zhang,Shiyu Fu,Hao Liu,Juanli Shen,Xi Yuan,Xuepei Zhou
Bioplastics based on lignin-containing cellulose nanofibrils (LCNF) have emerged as attractive alternatives to petrochemical plastics. However, the preparation of LCNF-based bioplastics with excellent wet-mechanical properties and water stability remains challenging. This study reports a sustainable route for the preparation of LCNF-based bioplastics with excellent wet mechanical properties and water stability. First, a deep eutectic solvent was employed to pretreat the bamboo powder to partially remove lignin. Then, the pretreated bamboo powder was esterified by one-step maleic anhydride (MAH) esterification to produce maleic anhydride-esterified LCNF (MLCNF). MLCNF exhibits a high aspect ratio (337), fine diameter (4.6 nm), and high surface charge (1.67 mmol/g). These properties endow MLCNF bioplastics with excellent wet elongation at break (41 %, significantly higher than other cellulose-based bioplastics), wet tensile strength (43.5 MPa), wet toughness (9.8 MJ m −3 ), dry tensile strength (164 MPa), dry toughness (15.7 MJ m −3 ), thermal stability, hydroplastic properties, and water stability (water contact angle: 91°). This research provides a straightforward, eco-friendly, and efficient approach for developing bioplastics with excellent wet mechanical properties and water stability using renewable lignocellulosic resources, with the potential to replace petrochemical plastics.
研究领域:
材料科学
·
生物质资源利用
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Chao Liu,Min Wei,Jia Wang,Junming Xu,Jianchun Jiang,Kui Wang
Directional depolymerization is a critical step for the integrated utilization of waste lignocellulosic biomass resources to produce value-added biofuels and biochemicals. Herein, we demonstrate an efficient and environmentally benign liquefied process for converting cellulose and waste lignocellulosic residues into levulinic acid (LA) in a polar aprotic solvent using a low-cost sulfate as catalyst. Due to the synergistic effect between the γ-valerolactone (GVL) and an active acid center derived from sulfate, more than 77 mol % and 61 mol % of biochemicals were obtained from cellulose and bamboo meal wastes in GVL/H2O (m/m = 9:1) solvent at 200 °C for 2 h, respectively. A combination of 27Al NMR spectroscopy and electrospray quadrupole time-of-flight tandem mass spectrometry (ESI-Q-TOF-MS/MS) revealed that the [Al(OH)2(aq)]+ species significantly contributed to cellulose depolymerization under cationic polarization of polar aprotic solvents. Besides, the existence of an appropriate amount of water was believed to be responsible for promoting the destruction of cellulose and the restraint of humin formation. Notably, all solvents and byproducts could be efficiently retrieved during this process, which shed light on its considerable industrial application prospects and facilitated the high value-added utilization of waste biomass resources.
研究领域:
生物质化学
·
可再生资源工程
✓ 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）