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PREPARATION AND PROPERTIES OF cellulose fiber/SILICA CORE-SHELL MAGNETIC NANOCOMPOSITES

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PREPARATION AND PROPERTIES OF CELLULOSE FIBER/SILICA CORE-SH...

Recent Advances in Superhydrophobic and Antibacterial cellulose‑Based fibers and Fabrics:Bio‑inspiration,Strategies,and Applications

第十六届木材、纤维及制浆化学国际会议

作者： Weibing Wu~*,Yi Jing,Xiaofan Zhou,and Hongqi Dai Jiangsu Provincial Key Lab of Pulp & Paper Science & Technology,College of Light Industry Science and Engineering,Nanjing Forestry University,Nanjing 210037 China.

cellulose fiber/silica core-shell magnetic nanocomposites were prepared by modified "lumen loading" method with polyethylenimine as retention aid. They have preserved the inherent properties of the fiber and gained the magnetically responsive properties of *** paper was further made from the *** materials were characterized by X-ray diffraction,transmission electron microscope, scanning electron microscopy,vibrating sample magnetometer and paper *** nanoparticles were observed of better distribution in the cell lumen after silica shell *** of nanoparticles, which was enhanced by beating of pulp and addition of PEI, blocked the contact of fibers to *** results demonstrate that magnetic nanocomposite fiber and paper possess good superparamagnetism with low remnant magnetization and *** will allow the investigation of new concepts in paper making and packaging,security paper,and information storage.

关键词： nanocomposite silica core-shell nanoparticle cellulose fiber lumen-loading magnetic paper

来源： cnki会议评论

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Advanced fiber Materials 2023年第5期5卷 1555-1591页

作者： Hua Zhou Qingshuo Li Zhong Zhang Xungai Wang Haitao Niu College of Textiles and Clothing Qingdao UniversityQingdao 266071China Collaborative Innovation Center for Eco‑Textiles of Shandong Province and the Ministry of Education Collaborative Qingdao UniversityQingdao 266071China JC STEM Lab of Sustainable fibers and Textiles School of Fashion and TextilesThe Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina

cellulose-based fabrics are ubiquitous in our daily *** are the preferred choice for bedding materials,active sportswear,and next-to-skin ***,the hydrophilic and polysaccharide characteristics of cellulose materials make them vulnerable to bacterial attack and pathogen *** design of antibacterial cellulose fabrics has been a long-term and on-going *** strategies based on the construction of surface micro-/nanostructure,chemical modification,and the application of antibacterial agents have been extensively investigated by many research groups *** review systematically discusses recent research on super-hydrophobic and antibacterial cellulose fabrics,focusing on morphology construction and surface ***,natural surfaces showing liquid-repellent and antibacterial properties are introduced and the mechanisms behind are ***,the strategies for fabricating super-hydrophobic cellulose fabrics are summarized,and the contribution of the liquid-repellent function to reducing the adhesion of live bacteria and removing dead bacteria is *** studies on cellulose fabrics functionalized with super-hydrophobic and antibacterial properties are discussed in detail,and their potential applications are also ***,the challenges in achieving super-hydrophobic antibacterial cellulose fabrics are discussed,and the future research direction in this area is proposed.

关键词： cellulose fiber Super-hydrophobic Antibacterial Fabrication strategies Applications

Gradient layered MXene/Fe_(3)O_(4)@CNTs/TOCNF ultrathin nanocomposite paper exhibiting effective electromagnetic shielding and multifunctionality

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Nano Research 2024年第9期17卷 8233-8242页

作者： Zhengkun Ma Jingzong He Shilin Liu Xiaoxuan Qie Meiheng Gan Ruonan Cheng Qilin Wu Malcolm Xing State Key Laboratory for Modification of Chemical fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China College of Chemistry and Chemical Engineering Donghua UniversityShanghai 201620China Department of Mechanical Engineering University of ManitobaWinnipegMB R3T 2N2Canada

As wearable electronic devices are rapidly developing,there is an urgent need for lightweight,flexible,and ultrathin multifunctional electromagnetic interference(EMI)shielding ***,the flexible ultrathin paper that combines efficient shielding and multifunctional integration remains a considerable ***,a novel MXene/Fe_(3)O_(4)@CNTs/TOCNF(MCT,MXene=transition metal carbide/carbonitride,CNTs=carbon nanotubes,TOCNF=TEMPO-oxidized cellulose nanofiber,TEMPO=2,2,6,6-tetramethylpiperidine-1-oxyl radical)nanocomposite paper with a multilayer electromagnetic gradient structure and electromagnetic dual losses was successfully prepared by a simple filtration *** from effective gradient design and adjusting the proportion of TOCNF,the composite paper(only 18μm)exhibits outstanding shielding effectiveness(SE)of 66 dB in the X-band,ultrahigh thickness-specific SE and surface-specific SE values of 3300 dB·mm-1 and 31,428 dB·cm^(2)·g^(-1)***,dehydroxylation treatment improves MCT paper's hydrophobicity,environmental stability,and mechanical strength,expanding its range of ***,the highly efficient Joule heating properties and hydrophobicity provide MCT additional de-icing *** also simulated the electromagnetic shielding effects of MCT composite paper,which was applied in *** study documents an innovative and intriguing material combination,providing a simple and effective manufacturing strategy for developing EMI shielding *** paper is highly suitable for outdoor portable or wearable electronic devices and has significant application potential in humid/severe cold environments.

关键词： cellulose fiber thin papers nanocomposites electromagnetic interference(EMI)shielding

A Rapid Parameter of Enzyme-Treated Cellulosic Material Revealed by Reducing Sugar Release

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Journal of Renewable Materials 2024年第3期12卷 539-551页

作者： Verônica Távilla Ferreira Silva Adriane Maria Ferreira Milagres Departamento de Biotecnologia Escola de Engenharia de LorenaUniversidade de São PauloLorenaSP12602-810Brazil

This study was conducted to evaluate the effectiveness of enzymes in purifying and reducing the degree of polymerization of cellulose for the production of dissolving *** goal was to determine the contributions of xylanase(X)and endoglucanase(EG)in the treatment of pulp,specifically by quantifying the formation of soluble and insoluble reducing sugars using the dinitrosalycilic acid(DNS)***,the release of soluble reducing sugars(RSSol)was enhanced after xylanase treatment,while endoglucanase(EG)treatment led to changes in insoluble reducing sugars(RSIns).The maximum synergism was observed for RSIns when a high ratio of endoglucanase to xylanase(320EG:5X/g pulp)was *** relative contribution of endoglucanase to RSins was determined to be 15.6%of the total reducing *** viscosity of pulps treated with xylanase decreased only by 7%,whereas endoglucanase treatment significantly reduced viscosity by 45%.Modifications in the particle size were observed after pulp treatment with the combination of endoglucanase and *** summary,the DNS test is a rapid and effective method for evaluating the efficiency of enzyme treatments on *** measurement of RSIns correlates with changes in pulp viscosity to different extents,providing valuable insights into the effectiveness of enzyme treatments.

关键词： Endoglucanase xylanase cellulose fiber pulp synergism

Producing Spinnable Regenerated Cellulosic fibers from Palm fibers for Use in the Textile Industry

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Journal of Textile Science and Technology 2022年第4期8卷 163-186页

作者： Shahad Ibrahim Omar Badr Leeds British Academy Jeddah Kingdom of Saudi Arabia

The textile industry is considered a major industry worldwide, and some countries use available domestic raw materials for textile manufacturing, being one of many other economic resources. Meanwhile, the Kingdom of Saudi Arabia is at the forefront of States paying great attention to the cultivation of palm trees due to their great importance, which are an indispensable traditional food for a large portion of the population. However, huge quantities of palm’s by-products, especially palm fibers, are constantly wasted, although they can be effectively used to produce textiles of particular end uses such as ropes. This study, therefore, sought to explore the potential of extracting cellulose from palm fibers for use in the textile industry. The study has utilized the experimental approach by applying alkaline to palm fibers so as to extract inherent cellulose. It has also applied mechanical processing to turn cellulose into fibers. fibers’ physical properties (color, diameter, length), chemical properties (ratios of cellulose, hemicellulose, and lignin), and mechanical properties (tensile strength and elongation of fibers before and after treatment) were all studied. The study has proved that the physical, chemical and mechanical properties of regenerated cellulose fibers extracted from palm fibers are similar to those of other natural fibers such as bamboo and linen, and thus can be used in the textile industry. The study also compared different types of palm trees to determine the one that contains the largest concentration of cellulose. However, it was found that sugar palm fibers contain the highest cellulose concentration of 44% and therefore, it was selected for the application of the study’s theory. The study recommends making use of palm fiber in manufacturing textiles for particular end uses such as ropes, fillings and filters, as well as applying the theory of the study to other plants that have not yet been manipulated.

关键词： Palm fiber cellulose fiber Sugar Palm Textile Industries

Effect of magnesium hydroxide as cigarette paper filler to reduce cigarette smoke toxicity

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Journal of Bioresources and Bioproducts 2016年第3期1卷 152-158页

作者： Xian Lu Mingyou Liu Zhibin He South China University of Technology Guangzhou510640China Department of Chemical Engineering University of New BrunswickFrederictonNew BrunswickCanada

The use of magnesium hydroxide(Mg(OH)_(2))was proposed as a filler to replace part of the calcium carbonate(CaCO_(3))in cigarette paper and reduce the toxicity of the smoke from *** property changes and smoke reducing ability of this possible substitution were effectively *** results showed that adding 10%Mg(OH)_(2) could meet the requirements of the physical property of the cigarette ***,with the addition of Mg(OH)2 as a filler in the cigarette paper,the pyrolysis temperature of the cigarette paper decreased,while the porosity and specific surface area *** a result,the main-stream smoke had a lower smoke total particle matter(STMP),tar,nicotine and carbon monoxide content,and the side-stream smoke also had a lower STMP.

关键词： cellulose fiber magnesium hydroxide cigarette paper toxicity smoke harmful substances pyrolysis