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Biodegradable, superhydrophobic walnut wood membrane for the separation of oil/water mixtures

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 9,   Pages 1377-1386 doi: 10.1007/s11705-022-2157-z

Abstract: The preparation of environmentally friendly oil/water separation materials remains a great challenge. Freeze-drying of wood after lignin removal yields wood aerogels, which can be used as substrates to prepare fluorine-free environmentally friendly superhydrophobic materials, However, they are more suitable for absorption rather than filtration applications due to their poor strength. A study using cross-sections of pristine wood chips as substrates retains the original strength of wood, but the use of the cross-sectional of wood pieces limits their thickness, strength, and size. In this paper, a degradable fluorine-free superhydrophobic film (max. water contact angle of approximately 164.2°) with self-cleaning and abrasion resistance characteristics was prepared by a one-step method using pristine and activated walnut longitudinal section films as the substrate, with tetraethyl orthosilicate as a precursor and dodecyltriethoxysilane as a modifier. The tensile strength results show that superhydrophobic films with pristine or activated wood substrates maintained the strength of pristine wood and were 2.2 times stronger than the wood aerogel substrate. In addition, after cross-laminating the two samples, the films had the ability to separate oil and water by continuous filtration with high efficiency (98.5%) and flux (approximately 1.3 × 103 L∙m‒2∙h‒1). The method has potential for the large-scale fabrication of degradable superhydrophobic filtration separation membranes.

Keywords： wood nanotechnology     superhydrophobic     biodegradable     surface modification     oil/water separation    

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Nano-copper ions assembled cellulose-based composite with antibacterial activity for biodegradable personal

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 10,   Pages 1544-1554 doi: 10.1007/s11705-022-2288-2

Abstract: The current SARS-CoV-2 pandemic has resulted in the widespread use of personal protective equipment, particularly face masks. However, the use of commercial disposable face masks puts great pressure on the environment. In this study, nano-copper ions assembled cotton fabric used in face masks to impart antibacterial activity has been discussed. To produce the nanocomposite, the cotton fabric was modified by sodium chloroacetate after its mercerization, and assembled with bactericidal nano-copper ions (about 10.61 mg·g–1) through electrostatic adsorption. It demonstrated excellent antibacterial activity against Staphylococcus aureus and Escherichia coli because the gaps between fibers in the cotton fabric allow the nano-copper ions to be fully released. Moreover, the antibacterial efficiency was maintained even after 50 washing cycles. Furthermore, the face mask constructed with this novel nanocomposite upper layer exhibited a high particle filtration efficiency (96.08% ± 0.91%) without compromising the air permeability (28.9 min·L–1). This green, economical, facile, and scalable process of depositing nano-copper ions onto modified cotton fibric has great potential to reduce disease transmission, resource consumption, and environmental impact of waste, while also expanding the range of protective fabrics.

Keywords： cellulose-based     nanocomposite     biodegradable antibacterial fabric     nano-copper ions     face masks    

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Micronization of curcumin with biodegradable polymer by supercritical anti-solvent using micro swirl

Kimthet Chhouk, Wahyudiono, Hideki Kanda, Shin-Ichro Kawasaki, Motonobu Goto

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 1,   Pages 184-193 doi: 10.1007/s11705-017-1678-3

Abstract: Curcumin is a hydrophobic polyphenol compound exhibiting a wide range of biological activities such as anti-inflammatory, anti-bacterial, anti-fungal, anti-carcinogenic, anti-human immunodeficiency virus, and anti-microbial activity. In this work, a swirl mixer was employed to produce the micronized curcumin with polyvinylpyrrolidone (PVP) by the supercritical anti-solvent process to improve the bioavailability of curcumin. The effects of operating parameters such as curcumin/PVP ratio, feed concentration, temperature, pressure, and CO flow rate were investigated. The characterization and solubility of particles were determined by using scanning electron microscopy, Fourier Transform Infrared spectroscopy, and ultra-violet-visible spectroscopy. The result shows that the optimal condition for the production of curcumin/PVP particles is at curcumin/PVP ratio of 1:30, feed concentration of 5 mg·mL , temperature of 40 °C, pressure of 15 MPa, and CO flow rate of 15 mL·min . Moreover, the dissolution of curcumin/PVP particles is faster than that of raw curcumin.

Keywords： micronization     curcumin     polyvinylpyrrolidone     supercritical anti-solvent     swirl mixer    

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Biodegradable Materials and the Tissue Engineering of Nerves

Xiaosong Gu

Engineering 2021, Volume 7, Issue 12,   Pages 1700-1703 doi: 10.1016/j.eng.2021.10.011

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Synthesis and characterization of biodegradable thermoplastic elastomers derived from N′,N-bis (2-carboxyethyl

Jiaojiao Shang, Guo Yao, Ronghui Guo, Wei Zheng, Long Gu, Jianwu Lan

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 3,   Pages 457-466 doi: 10.1007/s11705-018-1716-9

Abstract:

Biodegradable poly(ether-imide-ester) elastomers were synthesized from succinic acid, 1,4-butanediol

Keywords： thermoplastic elastomers     biodegradability     thermo-stability     mechanical property     aromatic bisimide moiety    

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Biodegradable polymethacrylic acid grafted psyllium for controlled drug delivery systems

Ranvijay KUMAR, Kaushlendra SHARMA

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 1,   Pages 116-122 doi: 10.1007/s11705-013-1310-0

Abstract: In addition, the biodegradable Psy- -PMA had the highest drug release in the acidic medium.

Keywords： psyllium     acetyl salicylic acid     in-vitro drug release     swelling     biodegradation    

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Challenges and Solutions for the Additive Manufacturing of Biodegradable Magnesium Implants Article

Yinchuan Wang, Penghuai Fu, Nanqing Wang, Liming Peng, Bin Kang, Hui Zeng, Guangyin Yuan, Wenjiang Ding

Engineering 2020, Volume 6, Issue 11,   Pages 1267-1275 doi: 10.1016/j.eng.2020.02.015

Abstract: structures, additive manufacturing (AM) techniques have provided unprecedented opportunities to produce biodegradableHowever, many challenges hinder the fabrication of AM-processed biodegradable Mg-based implants, such

Keywords： Additive manufacturing     Selective laser melting     Biodegradable Mg alloys     Tissue engineering scaffolds    

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Replacing Traditional Plastics with Biodegradable Plastics: Impact on Carbon Emissions

Guanyi Chen,Jianyuan Li,Yunan Sun,Zhi Wang,Gary A. Leeke,Christian Moretti,Zhanjun Cheng,Yuan Wang,Ning Li,Lan Mu,Jinyu Li,Junyu Tao,Beibei Yan,Li´an Hou

Engineering 2024, Volume 32, Issue 1,   Pages 153-162 doi: 10.1016/j.eng.2023.10.002

Abstract: Countries worldwide have shown high interest in replacing traditional plastics with biodegradable plasticsHowever, no systematic comparison has been conducted on the carbon emissions of biodegradable versusThis study evaluates the carbon emissions of traditional and biodegradable plastic products (BPPs) overHowever, the high cost of biodegradable plastics is a challenge for their widespread use.This study has important reference significance for the sustainable development of the biodegradable

Keywords： Carbon emissions     Biodegradable plastics     Different disposal scenarios     Daily life consumption     Environmental    

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Advances in Soft Materials for Sustainable Electronics Review

Moon Jong Han, Dong Ki Yoon

Engineering 2021, Volume 7, Issue 5,   Pages 564-580 doi: 10.1016/j.eng.2021.02.010

Abstract: energy, ecofriendly materials have attracted extensive research interest due to their sustainability and biodegradable

Keywords： Sustainable     Biodegradable     Soft materials     Organic electronics    

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Research Progress and Future Development of Nonferrous Biomedical Materials

Guan Shaokang, Zhu Shijie, ZhengYufeng, Wang Yunbing, Zhang Xingdong

Strategic Study of CAE 2023, Volume 25, Issue 1,   Pages 104-112 doi: 10.15302/J-SSCAE-2023.01.008

Abstract: development trend, and scientific issues of nonferrous medical materials for permanent implants, biodegradable

Keywords： nonferrous biomedical materials     nonferrous materials for permanent implants     biodegradable nonferrous    

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Title Author Date Type Operation

Biodegradable, superhydrophobic walnut wood membrane for the separation of oil/water mixtures

Journal Article

Nano-copper ions assembled cellulose-based composite with antibacterial activity for biodegradable personal

Journal Article

Micronization of curcumin with biodegradable polymer by supercritical anti-solvent using micro swirl

Kimthet Chhouk, Wahyudiono, Hideki Kanda, Shin-Ichro Kawasaki, Motonobu Goto

Journal Article

Biodegradable Materials and the Tissue Engineering of Nerves

Xiaosong Gu

Journal Article

Synthesis and characterization of biodegradable thermoplastic elastomers derived from N′,N-bis (2-carboxyethyl

Jiaojiao Shang, Guo Yao, Ronghui Guo, Wei Zheng, Long Gu, Jianwu Lan

Journal Article

Biodegradable polymethacrylic acid grafted psyllium for controlled drug delivery systems

Ranvijay KUMAR, Kaushlendra SHARMA

Journal Article

Challenges and Solutions for the Additive Manufacturing of Biodegradable Magnesium Implants

Yinchuan Wang, Penghuai Fu, Nanqing Wang, Liming Peng, Bin Kang, Hui Zeng, Guangyin Yuan, Wenjiang Ding

Journal Article

Replacing Traditional Plastics with Biodegradable Plastics: Impact on Carbon Emissions

Guanyi Chen,Jianyuan Li,Yunan Sun,Zhi Wang,Gary A. Leeke,Christian Moretti,Zhanjun Cheng,Yuan Wang,Ning Li,Lan Mu,Jinyu Li,Junyu Tao,Beibei Yan,Li´an Hou

Journal Article

Advances in Soft Materials for Sustainable Electronics

Moon Jong Han, Dong Ki Yoon

Journal Article

Research Progress and Future Development of Nonferrous Biomedical Materials

Guan Shaokang, Zhu Shijie, ZhengYufeng, Wang Yunbing, Zhang Xingdong

Journal Article