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学者姓名:李晓
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Plastics, accumulating globally as microplastics in living organisms, significantly contribute to environmental issues. Current materials like polylactic acid and commercial paper face limitations due to inadequate heat and water resistance, resulting in various practical inconveniences. This study reports a high-strength, water-resistant, recyclable, and naturally degradable pure cellulose food packaging material, which is crafted from bacterial cellulose (BC) and ethyl cellulose (EC) by a straightforward filtration and scratch coating process. The use of the EC ethanol solution eliminates the need for additional binders. Remarkably, the EC-BC pure cellulose material exhibits excellent mechanical properties (tensile strength of 195.3 ± 23.2 MPa), a stability in liquid environments (136.9 ± 24.2 MPa mechanical strength after 30 minutes of immersion in water), recyclability, natural degradability, cost-effectiveness, and non-toxicity. These attributes position binder-free hybrid designs, based on cellulose structures, as a promising solution to address environmental challenges arising from the extensive use of single-use plastics. © 2024 The Author(s)
Keyword :
Disposable plastic substitute Disposable plastic substitute Environment-friendly Environment-friendly Packaging material Packaging material Pure cellulose Pure cellulose Water resistance Water resistance
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GB/T 7714 | Deng, Y. , Wu, S. , Zhu, T. et al. Ecological packaging: Creating sustainable solutions with all-natural biodegradable cellulose materials [J]. | Giant , 2024 , 18 . |
MLA | Deng, Y. et al. "Ecological packaging: Creating sustainable solutions with all-natural biodegradable cellulose materials" . | Giant 18 (2024) . |
APA | Deng, Y. , Wu, S. , Zhu, T. , Gou, Y. , Cheng, Y. , Li, X. et al. Ecological packaging: Creating sustainable solutions with all-natural biodegradable cellulose materials . | Giant , 2024 , 18 . |
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Combining molecular imprinting technology with electrostatic spinning technology, a molecularly imprinted nanofiber membrane material with memory and recognition of specific imprinted molecules is thus produced. It has the advantages of high efficiency, reusability, easy amplification, and simple operation. In this study, alkane molecularly imprinted nanofibrous membranes are prepared as a carrier for immobilize Bacillus cereus LY-1 for the degradation of diesel in oil-water system. The adsorption capacity of the molecularly imprinted material for diesel oil with n-decyl alcohol as the template molecule reach 120.25 mg g-1, the adsorption capacity of alkane molecularly imprint nanofiber membrane prepared using polyvinyl alcohol (PVA) as the membrane substrate material is 41.37 mg g-1. After 4 days, the immobilized LY-1 cells eliminate roughly 80.7% of the diesel at a starting concentration of 3 g L-1. The results show that imprinted structures in MINM enhance degradation by loaded microorganisms. PVA molecularly imprinted nanofiber membrane before and after bacterial loading used in diesel removal. image
Keyword :
adsorption adsorption electrospinning electrospinning membranes membranes
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GB/T 7714 | Yang, Bo , Ying, Xiaoguang , Zhang, Weiying et al. Alkane molecularly imprinted nanofiber membranes used to enhance the diesel degradation process [J]. | JOURNAL OF APPLIED POLYMER SCIENCE , 2024 , 141 (24) . |
MLA | Yang, Bo et al. "Alkane molecularly imprinted nanofiber membranes used to enhance the diesel degradation process" . | JOURNAL OF APPLIED POLYMER SCIENCE 141 . 24 (2024) . |
APA | Yang, Bo , Ying, Xiaoguang , Zhang, Weiying , Li, Xiao . Alkane molecularly imprinted nanofiber membranes used to enhance the diesel degradation process . | JOURNAL OF APPLIED POLYMER SCIENCE , 2024 , 141 (24) . |
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合成聚乳酸聚氨酯嵌段共聚物预聚体(PLA-b-PUP),以其作为聚乳酸(PLA)和热塑性聚氨酯(TPU)的活性相容剂,通过原位反应增容制备PLA/TPU/PLA-b-PUP超韧共混物.通过拉伸试验、冲击试验、 SEM、 FTIR、 DSC和TGA研究共混物的力学性能、热性能和增韧机理.结果表明,PLA-b-PUP中的异氰酸酯基团与PLA和TPU上的活性基团发生反应,显著改善了PLA/TPU共混物两相界面的相容性.随着PLA-b-PUP的加入量增加,共混物中PLA的玻璃化转变温度和相对结晶度逐渐降低,当PLA-b-PUP的质量分数为PLA/TPU共混物的4%时,共混材料的断裂伸长率和缺口冲击强度分别达到无相容剂时的8.12和2.73倍,表现出良好的增容增韧效果.添加PLA-b-PUP后,共混物的初始分解温度有所降低,但最快分解温度有所提高.
Keyword :
PLA/TPU/PLA-b-PUB共混物 PLA/TPU/PLA-b-PUB共混物 原位反应 原位反应 增容机制 增容机制 增韧机理 增韧机理 热塑性聚氨酯 热塑性聚氨酯 聚乳酸 聚乳酸 聚乳酸聚氨酯嵌段预聚体 聚乳酸聚氨酯嵌段预聚体
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GB/T 7714 | 朱海彬 , 朱涛 , 张卫英 et al. 聚乳酸聚氨酯嵌段预聚体增韧PLA/TPU共混物 [J]. | 福州大学学报(自然科学版) , 2024 , 52 (03) : 268-275 . |
MLA | 朱海彬 et al. "聚乳酸聚氨酯嵌段预聚体增韧PLA/TPU共混物" . | 福州大学学报(自然科学版) 52 . 03 (2024) : 268-275 . |
APA | 朱海彬 , 朱涛 , 张卫英 , 英晓光 , 李晓 . 聚乳酸聚氨酯嵌段预聚体增韧PLA/TPU共混物 . | 福州大学学报(自然科学版) , 2024 , 52 (03) , 268-275 . |
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Hydrophilic macroporous sponge has been widely used in solar steam generation, catalysis, biosensing and other fields due to its high water transporting and adsorption ability. However, the synthesis step of hydrophilic sponge usually needs the assistance of a freezing process and toxic chemicals such as chemical crosslinkers or foaming agents. To solve these problems, herein, a novel and facile tactic based on the salting out effect was proposed to prepare hydrophilic amphibious open-cell macroporous sponge from the poly(vinyl alcohol) (PVA) solution. Glycerol, CaCl2 and Na3Cit were successively added into PVA solution. The sol-gel transition would occur due to the salting-out effect of Na3Cit and hydrogen bond crosslinking of glycerol. Finally, the hydrophilic PVA sponge with different shapes and sizes could be easily prepared. Moreover, this hydrophilic wet sponge could be room temperature dried into dry sponge and this dry sponge could be quickly restored to wet sponge after immersing in water due to its ultra-rapid water absorption. The microstructure and mechanical properties of PVA wet and dry sponges were studied. The PVA wet sponge showed excellent mechanical properties with a tensile strength, Young's modulus, and fracture energy of 1.51 ± 0.01 MPa, 0.44 ± 0.02 MPa, and 113.2 ± 1.6 kJ m−2, respectively. The wet sponge prepared in this work has an average porosity of up to 50 μm, and the pore structure can still be maintained during the conventional room temperature drying process. Moreover, the PVA sponge showed high stability in various aqueous media including acid, alkaline, and salt solutions. This work provided a simple and large-scale method to prepare amphibious open-cell hydrophilic PVA sponge. © 2024 The Royal Society of Chemistry.
Keyword :
Alkalinity Alkalinity Biomechanics Biomechanics Chlorine compounds Chlorine compounds Crosslinking Crosslinking Elastic moduli Elastic moduli Glycerol Glycerol Hydrogen bonds Hydrogen bonds Hydrophilicity Hydrophilicity Indicators (chemical) Indicators (chemical) Polyvinyl alcohols Polyvinyl alcohols Pore structure Pore structure Room temperature Room temperature Sodium compounds Sodium compounds Sol-gel process Sol-gel process Sol-gels Sol-gels Tensile strength Tensile strength Water absorption Water absorption
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GB/T 7714 | Chen, Mengdie , Wang, Yuhao , Yang, Mohan et al. Hydrophilic amphibious open-cell macroporous sponge by Hofmeister effect induced nanofibrils [J]. | Journal of Materials Chemistry A , 2024 , 12 (27) : 16350-16360 . |
MLA | Chen, Mengdie et al. "Hydrophilic amphibious open-cell macroporous sponge by Hofmeister effect induced nanofibrils" . | Journal of Materials Chemistry A 12 . 27 (2024) : 16350-16360 . |
APA | Chen, Mengdie , Wang, Yuhao , Yang, Mohan , Zhang, Lei , Wang, Kai , Ye, Dezhan et al. Hydrophilic amphibious open-cell macroporous sponge by Hofmeister effect induced nanofibrils . | Journal of Materials Chemistry A , 2024 , 12 (27) , 16350-16360 . |
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以蒙脱土改性聚丙烯酰胺水凝胶为基底,通过苯胺预渗透方法制备聚苯胺浓度梯度分布的聚苯胺/改性蒙脱土/聚丙烯酰胺(PANI/DCM/PAM)导电水凝胶(PDPG),重点考察其力学性能和应变传感性能.结果表明,壳聚糖改性蒙脱土的分散液稳定性明显提高;苯胺预渗透5 s、脱水5 h所得PDPG水凝胶的拉伸强度和断裂伸长率分别达到194 kPa和685%;改变苯胺预渗透时间可以调控PDPG水凝胶的导电性能和传感性能;当应变为0~400%时,PDPG水凝胶的灵敏度最高值为7.02.基于PDPG导电水凝胶的柔性应变传感器能够实现对人体全尺度运动的监测,并具有很好的循环稳定性.
Keyword :
全尺度监测 全尺度监测 导电水凝胶 导电水凝胶 柔性应变传感器 柔性应变传感器 聚丙烯酰胺 聚丙烯酰胺 聚苯胺 聚苯胺 蒙脱土 蒙脱土
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GB/T 7714 | 孙晓钰 , 黎维武 , 逄述博 et al. 聚苯胺导电水凝胶基柔性应变传感器的制备 [J]. | 福州大学学报(自然科学版) , 2024 , 52 (02) : 221-227 . |
MLA | 孙晓钰 et al. "聚苯胺导电水凝胶基柔性应变传感器的制备" . | 福州大学学报(自然科学版) 52 . 02 (2024) : 221-227 . |
APA | 孙晓钰 , 黎维武 , 逄述博 , 张卫英 , 英晓光 , 李晓 . 聚苯胺导电水凝胶基柔性应变传感器的制备 . | 福州大学学报(自然科学版) , 2024 , 52 (02) , 221-227 . |
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Based on transfer printing technology, micro-LED pixels can be transferred to different types and sizes of driving substrates to realize displays with different application scenarios. To achieve a successful transfer, GaN-based micro-LEDs first need to be separated from the original epitaxial substrate. Here, micro-LED pixels (each size 25 mu m x 30 mu m) on the sapphire substrate were transferred to a flexible semiconductor wafer processing (SWP) tape that is strongly sticky by conventional laser lift-off (LLO) techniques. The pixels on the SWP tape were then transferred by using a sacrificial layer of non-crosslinked oligomeric polystyrene (PS) film onto the intermediate and rigid substrate (IRS) with weak and tunable adhesion by thiol (-SH) modification. The electrode of the micro-LED is Au metal, which forms Au-S bonds with the surface of the IRS to fix the pixels. The rigid substrate helps ensure that the pixel spacing is almost unchanged during the stamp transfer process, and the weak and tunable adhesion facilitates the pixels being picked up by the stamp. The experimental results demonstrate that the pixels can be efficiently transferred to the IRS by LLO and sacrificial layer-assistance, which will provide the possibility of achieving the further transfer of pixels to different types and sizes of driving substrates by a suitable transfer stamp. The transfer process details are discussed, which can provide insights into the transfer of micro-nano devices through polymer sacrificial layers.
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GB/T 7714 | Pan, Kui , Sun, Jie , Lin, Chang et al. Highly effective transfer of micro-LED pixels to the intermediate and rigid substrate with weak and tunable adhesion by thiol modification [J]. | NANOSCALE , 2023 , 15 (9) : 4420-4428 . |
MLA | Pan, Kui et al. "Highly effective transfer of micro-LED pixels to the intermediate and rigid substrate with weak and tunable adhesion by thiol modification" . | NANOSCALE 15 . 9 (2023) : 4420-4428 . |
APA | Pan, Kui , Sun, Jie , Lin, Chang , Deng, Liying , Li, Xiao , Mao, Zuodong et al. Highly effective transfer of micro-LED pixels to the intermediate and rigid substrate with weak and tunable adhesion by thiol modification . | NANOSCALE , 2023 , 15 (9) , 4420-4428 . |
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本文采用聚(丙烯酰胺-丙烯酸)作为基底水凝胶,在经苯胺单面渗透后用Fe~(3+)氧化聚合得到PPCH水凝胶。主要考察了PPCH水凝胶的导电性、力学性能和应变传感性能,结果表明:在Fe~(3+)/An摩尔比为1.25、苯胺渗透5 min下得到的PPCH水凝胶,断裂应力和应变分别为180 k Pa、553%,此时电导率为0.269 S/m;在0-400%应变范围内,PPCH水凝胶的灵敏度(GF)最高值为6.31;基于PPCH水凝胶的柔性应变传感器能够用于对人体运动的监测。
Keyword :
人体运动监测 人体运动监测 柔性应变传感器 柔性应变传感器 水凝胶 水凝胶 聚苯胺 聚苯胺
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GB/T 7714 | 陈柏文 , 孙晓钰 , 郭清淳 et al. 聚苯胺/聚(丙烯酰胺-丙烯酸)导电水凝胶基柔性应变传感器的制备 [J]. | 胶体与聚合物 , 2023 , 41 (03) : 118-121 . |
MLA | 陈柏文 et al. "聚苯胺/聚(丙烯酰胺-丙烯酸)导电水凝胶基柔性应变传感器的制备" . | 胶体与聚合物 41 . 03 (2023) : 118-121 . |
APA | 陈柏文 , 孙晓钰 , 郭清淳 , 李桂珍 , 袁熙 , 侯文正 et al. 聚苯胺/聚(丙烯酰胺-丙烯酸)导电水凝胶基柔性应变传感器的制备 . | 胶体与聚合物 , 2023 , 41 (03) , 118-121 . |
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使用WC作为光催化材料通过水还原制氢很常见,但它通常需要与有效的光吸收剂协同才能产生有意义的光催化活性.这可归因于WC的窄带隙,导致水的氧化还原能力不足.有趣的是,我们的研究通过一种新型固液光催化体系克服了这种限制,该体系将裸WC光催化剂与液相光敏赤藓红B(ErB)相结合.这种概念的提出消除了将WC耦合到光吸收半导体的需要,这通常需要繁琐的程序来获得适当的功能化光催化复合材料.实验结果表明,在可见光(λ=520 nm)照射下,所提出的固液光催化体系产生了显著的氢气,然而,只有在三乙醇胺(TEOA)作为牺牲试剂的共同存在下.显然,仅加入WC和ErB的空白实验在典型的光催化条件下表现出几乎为零的光催化活性和无法测量的H2生成.在光照TEOA溶液中仅存在ErB或WC的光反应中也观察到类似的活性.这些空白实验证实了所有三种成分的重要性,即WC、ErB和TEOA,它们分别作为光催化剂、光吸收剂和牺牲试剂,在我们提出的体系中产生有意义的H2.值得注意的是,在我们的调查中系统地研究了三个关键参数,即pH值、ErB和WC浓度的影响.发现H2生成的最佳pH值为8,稍微改变到更碱性或酸性条件会降低体系的光催化活性.在pH<8时,部分TEOA将发生部分质子化,从而失去其在光催化体系中作为牺牲试剂的活性.当pH值增加到超过8时,反应介质中的低质子浓度也会扰乱热力学驱动,导致体系产生的H2受到抑制.同时,发现最佳ErB浓度为1 mmol·L-1,从最佳点降低或增加ErB浓度均不利于H2的产生.ErB浓度较低的体系(<1 mmol·L-1),在吸光上不足以满足体系的礼用,而较高浓度(>1 mmol·L-1ErB)的体系,会引起明显的散射效应,组织光穿透反应溶液.相反,WC的浓度与H2的生成呈稳定的正相关,在加入12mmol·L-1WC的体系中,H2的生成量最高.在最佳条件下,成功生成了66μmol·h-1 H2,AQE略高为6.6%在520 nm处,这归因于ErB-TEOA-WC在所提出的体系中的协同作用.光电化学评估证实了ErB、TEOA和WC之间的相互作用,从而降低了阻抗,同时提高了体系中的电荷利用率.因此,还记录到了极好的H2转换数(TON)为15,在至少20 h的连续反应中具有难以察觉的活性衰减.对于机理,密度泛函理论(DFT)计算进一步证实了W和C空位在H2生成中的主要作用,这归因于他们提供的产品解吸,在光反应期间提高转化速率.从这些发现中得出结论,我们提出的新型WC/ErB/TEOA体系在液固光催化体系提供了一种更容易从水中产生H2的策略,这为金属碳化物光催化剂避免选择繁琐的光吸收剂耦合.
Keyword :
WC WC 三乙醇胺 三乙醇胺 光催化 光催化 制氢 制氢 液相 液相 赤藓红B 赤藓红B
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GB/T 7714 | 雷永刚 , 赵天宇 , 黄锦鸿 et al. 金属碳化钨与液相染料光敏剂协同促进光催化制氢 [J]. | 物理化学学报 , 2023 , 39 (4) : 58-66 . |
MLA | 雷永刚 et al. "金属碳化钨与液相染料光敏剂协同促进光催化制氢" . | 物理化学学报 39 . 4 (2023) : 58-66 . |
APA | 雷永刚 , 赵天宇 , 黄锦鸿 , 张颖贞 , 臧雪瑞 , 李晓 et al. 金属碳化钨与液相染料光敏剂协同促进光催化制氢 . | 物理化学学报 , 2023 , 39 (4) , 58-66 . |
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使用WC作为光催化材料通过水还原制氢很常见,但它通常需要与有效的光吸收剂协同才能产生有意义的光催化活性。这可归因于WC的窄带隙,导致水的氧化还原能力不足。有趣的是,我们的研究通过一种新型固液光催化体系克服了这种限制,该体系将裸WC光催化剂与液相光敏赤藓红B(Er B)相结合。这种概念的提出消除了将WC耦合到光吸收半导体的需要,这通常需要繁琐的程序来获得适当的功能化光催化复合材料。实验结果表明,在可见光(λ=520 nm)照射下,所提出的固液光催化体系产生了显著的氢气,然而,只有在三乙醇胺(TEOA)作为牺牲试剂的共同存在下。显然,仅加入WC和Er B的空白实验在典型的光催化条件下表现出几乎为零的光催化活性和无法测量的H_2生成。在光照TEOA溶液中仅存在Er B或WC的光反应中也观察到类似的活性。这些空白实验证实了所有三种成分的重要性,即WC、Er B和TEOA,它们分别作为光催化剂、光吸收剂和牺牲试剂,在我们提出的体系中产生有意义的H_2。值得注意的是,在我们的调查中系统地研究了三个关键参数,即p H值、Er B和WC浓度的影响。发现H_2生成的最佳p H值为8,稍微改变到更碱性或酸性条件会降低体系的光催化活性。在p H <8时,部分TEOA将发生部分质子化,从而失去其在光催化体系中作为牺牲试剂的活性。当p H值增加到超过8时,反应介质中的低质子浓度也会扰乱热力学驱动,导致体系产生的H_2受到抑制。同时,发现最佳Er B浓度为1mmol·L~(-1),从最佳点降低或增加Er B浓度均不利于H_2的产生。Er B浓度较低的体系(<1mmol·L~(-1)),在吸光上不足以满足体系的礼用,而较高浓度(> 1 mmol·L~(-1) Er B)的体系,会引起明显的散射效应,组织光穿透反应溶液。相反,WC的浓度与H_2的生成呈稳定的正相关,在加入12 mmol·L~(-1) WC的体系中,H_2的生成量最高。在最佳条件下,成功生成了66μmol·h~(-1) H_2,AQE略高为6.6%在520 nm处,这归因于Er B-TEOA-WC在所提出的体系中的协同作用。光电化学评估证实了Er B、TEOA和WC之间的相互作用,从而降低了阻抗,同时提高了体系中的电荷利用率。因此,还记录到了极好的H_2转换数(TON)为15,在至少20 h的连续反应中具有难以察觉的活性衰减。对于机理,密度泛函理论(DFT)计算进一步证实了W和C空位在H_2生成中的主要作用,这归因于他们提供的产品解吸,在光反应期间提高转化速率。从这些发现中得出结论,我们提出的新型WC/Er B/TEOA体系在液固光催化体系提供了一种更容易从水中产生H_2的策略,这为金属碳化物光催化剂避免选择繁琐的光吸收剂耦合。
Keyword :
WC WC 三乙醇胺 三乙醇胺 光催化 光催化 制氢 制氢 液相 液相 赤藓红B 赤藓红B
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GB/T 7714 | 雷永刚 , 赵天宇 , 黄锦鸿 et al. 金属碳化钨与液相染料光敏剂协同促进光催化制氢(英文) [J]. | 物理化学学报 , 2023 , 39 (04) : 87-95 . |
MLA | 雷永刚 et al. "金属碳化钨与液相染料光敏剂协同促进光催化制氢(英文)" . | 物理化学学报 39 . 04 (2023) : 87-95 . |
APA | 雷永刚 , 赵天宇 , 黄锦鸿 , 张颖贞 , 臧雪瑞 , 李晓 et al. 金属碳化钨与液相染料光敏剂协同促进光催化制氢(英文) . | 物理化学学报 , 2023 , 39 (04) , 87-95 . |
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Air-borne pollutants in particulate matter (PM) form, produced either physically during industrial processes or certain biological routes, have posed a great threat to human health. Particularly during the current COVID-19 pandemic, effective filtration of the virus is an urgent matter worldwide. In this review, we first introduce some fundamentals about PM, including its source and classification, filtration mechanisms, and evaluation parameters. Advanced filtration materials and their functions are then summarized, among which polymers and MOFs are discussed in detail together with their antibacterial performance. The discussion on the application is divided into end-of-pipe treatment and source control. Finally, we conclude this review with our prospective view on future research in this area. (c) 2022 Institute of Process Engineering, Chinese Academy of Sciences. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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Air filtration Air filtration COVID-19 COVID-19 End -of -pipe treatment End -of -pipe treatment PM capture PM capture Source control Source control
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GB/T 7714 | Ji, Xuzheng , Huang, Jianying , Teng, Lin et al. Advances in particulate matter filtration: Materials, performance, and application [J]. | GREEN ENERGY & ENVIRONMENT , 2023 , 8 (3) : 673-697 . |
MLA | Ji, Xuzheng et al. "Advances in particulate matter filtration: Materials, performance, and application" . | GREEN ENERGY & ENVIRONMENT 8 . 3 (2023) : 673-697 . |
APA | Ji, Xuzheng , Huang, Jianying , Teng, Lin , Li, Shuhui , Li, Xiao , Cai, Weilong et al. Advances in particulate matter filtration: Materials, performance, and application . | GREEN ENERGY & ENVIRONMENT , 2023 , 8 (3) , 673-697 . |
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