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Preparation and Reinforcement Adaptability of jute fiber Reinforced Magnesium Phosphate Cement Based Composite Materials

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Journal of Wuhan University of Technology(Materials Science) 2024年第4期39卷 999-1009页

作者：刘芯州郭远臣 WANG Rui XIANG Kai WANG Xue YE Qing College of Civil Engineering Chongqing Three Gorges UniversityChongqing 404100China

To improve the brittleness characteristics of magnesium phosphate cement-based materials(MPC)and to promote its promotion and application in the field of structural reinforcement and repair,this study aimed to increase the toughness of MPC by adding jute fiber,explore the effects of different amounts of jute fiber on the working and mechanical properties of MPC,and prepare jute fiber reinforced magnesium phosphate cement-based materials(JFRMPC)to reinforce damaged *** improvement effect of beam performance before and after reinforcement was compared,and the strengthening and toughening mechanisms of jute fiber on MPC were explored through microscopic *** experimental results show that,as the content of jute fiber(JF)increases,the fluidity and setting time of MPC decrease continuously;When the content of jute fiber is 0.8%,the compressive strength,flexural strength,and bonding strength of MPC at 28 days reach their maximum values,which are increased by 18.0%,20.5%,and 22.6%compared to those of M0,*** beam strengthened with JFRMPC can withstand greater deformation,with a deflection of 2.3 times that of the unreinforced beam at *** strain of the steel bar is greatly reduced,and the initial crack and failure loads of the reinforced beam are increased by 192.1%and 16.1%,respectively,compared to those of the unreinforced *** JF added to the MPC matrix dissipates energy through tensile fracture and debonding pull-out,slowing down stress concentration and inhibiting the free development of cracks in the matrix,enabling JFRMPC to exhibit higher strength and better *** JF does not cause the hydration of MPC to generate new compounds but reduces the amount of hydration products generated.

关键词： magnesium phosphate cement jute fiber reinforcement of damaged beam flexural behavior

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Weak Expansive Soil Physical Properties Modification by Means of a Cement-jute fiber

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Fluid Dynamics & Materials Processing 2023年第8期19卷 2119-2130页

作者： Zisheng Yang Wendong Li Xuelei Cheng Ran Hai Shunqun Li School of Architectural and Civil Engineering Zhongyuan University of TechnologyZhengzhou450007China Yellow River Institute of Hydraulic Research Zhengzhou450003China School of Civil Engineering Tianjin Chengjian UniversityTianjin300384China

Sixteen groups of comprehensive tests have been conducted to investigate the modifications in the physical properties of a weak expansive soil due to the addition of a cement jute *** tests have been conducted to analyze the liquid plastic limit,the particle distribution and the free expansion *** results show that:(1)With an increase in the cement-jute fiber content,the free expansion rate of the modified expansive soil gradually decreases,however,such a rate rebounds when the fiber content exceeds 0.5%and the cement content exceeds 6%.(2)With an increase in the cement percentage,the particle unevenness coefficient(Cu)and curvature coefficient(Cc)of the modified expansive soil tend to grow *** Cc coefficient reaches 1.0 when the cement content is 6%.The unevenness coefficient of 16 soil samples is greater than 5.0,however,the Cu coefficient decreases when the cement content reaches 6%.(3)The plastic limit of soil increases as the cement content is made higher,while the liquid limit and plastic index decrease *** the content of the modified material is 2%+0.1%~2%+0.7%(Cement content+jute fiber content),the change of particle size distribution is most obvious.(4)When the contents of cement and jute fiber are is 6%and 0.5%,respectively,the modification induced in the physical properties of soil samples corresponds to the best case.

关键词： Cement jute fiber expansive soil expansion optimal dosage

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Enhancing mechanical behavior of micaceous soil with jute fibers and lime additives

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Journal of Rock Mechanics and Geotechnical Engineering 2021年第5期13卷 1093-1100页

作者： J.Zhang A.Deng M.Jaksa School of Civil Environmental and Mining EngineeringThe University of AdelaideAdelaideSA5000Australia

Micaceous soils are common in many tropical countries and regions,and in some locations with moderate *** soils are spongy and unstable when loaded and are not considered suitable as construction material in earth *** resolve the issue,this work examined performance of micaceous soil reinforced with a combination of jute fibers,hydrated lime or slag-lime.A total of 28 sample sets were prepared at various *** compression tests were conducted on the samples cured for 7 d and 28 d,*** test results suggested that the unconfined compressive strength(UCS)and material stiffness were increased with the inclusion of up to 1%fiber and decreased if additional fibers were *** ductility was improved consistently with up to 1.5%fiber *** inclusions of fibers combined with hydrated lime or slag-lime further enhanced strength and stiffness of micaceous soil,and the improvement depended on the dosages *** the dosages examined,jute fibers outweighed lime and slag in gaining ductility,and the optimal fiber content was 1%where strength and ductility were considered.

关键词： Geosynthetics jute fiber Unconfined compressive strength(UCS) Stiffness

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Studies on Mechanical Properties of jute/E-Glass fiber Reinforced Epoxy Hybrid Composites

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Journal of Minerals and Materials Characterization and Engineering 2016年第1期4卷 15-25页

作者： M. R. Sanjay B. Yogesha Department of Mechanical Engineering Malnad College of Engineering Hassan Visvesvaraya Technological University Belagavi India

Hybrid materials of any class are essential for current demands. This paper deals with the hybrid effect of composites made of jute/E-Glass fibers which are fabricated by hand layup method using LY556 Epoxy resin and HY951 hardener. The properties of this hybrid composite are determined by testing like tensile, flexural, impact, and inter laminar shear strength which are evaluated experimentally according to ASTM standards. The result of the test shows that hybrid composite of jute/ E-glass fiber has far better properties than that of jute fiber composite. However, it is found that the hybrid composite has better strength as compared to jute fiber composite fabricated separately with glass fiber.

关键词： jute fiber Glass fiber Epoxy Mechanical Properties

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Research on cutting characteristics of fiber bundle with high-speed photography

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International Journal of Agricultural and Biological Engineering 2020年第3期13卷 94-99页

作者： Zhitao He Huiling Ding Sanming Du Zhen Li Jiangtao Ji Jian Li Yongzhen Zhang Wuhan Research Institute of Materials Protection China Academy of Machinery Science and TechnologyWuhan 430030China College of Agricultural Equipment Engineering Henan University of Science and TechnologyLuoyang 471023China National United Engineering Laboratory for Advanced Bearing Tribology Henan University of Science and TechnologyLuoyang 471023China

Cutting is an essential and complicated process in many *** and low-consumption cutting operations are of great significance for environmental protection and energy *** development of high performance cutting parts relies on a deep understanding of the cutting process and cutting *** this research,a new type of cutting test bench with high-speed photography was developed,and the cutting tests were conducted on the jute fiber bundle from quasi-static cutting at 10 mm/s to dynamic cutting in the speed range of 0.6-2.4 m/*** cutting process was captured by a high-speed *** shows that compression exists before quasi-static cutting,and the compression force curve with respect to the compression ratio follows an exponential *** cutting speed has a significant effect on cutting *** cutting energy consumption is not a monotonous function of cutting speed owing to the combined effect of elastic deformation and friction of *** cutting energy increases with increasing cutting speed in the range of 0.6-1.2 m/s due to the increase of the friction within fibers and the friction between the blade and *** cutting energy decreases with increasing cutting speed in the range of 1.2-1.8 m/s,and tends to be a fixed value when the cutting speed exceeds 1.8 m/s due to the stabilized elastic deformation and friction *** the perspective of energy saving,it is meaningless to increase the blade speed excessively when cutting fiber bundles.

关键词： jute fiber cutting high-speed photography energy consumption friction

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Towards the Development of Mechanical Systems Entirely Based on Natural Materials

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Fluid Dynamics & Materials Processing 2022年第5期18卷 1285-1292页

作者： Fatima Zohra Elhilali Hicham Fihri-Fassi Hassan First University of Settat Settat26000Morocco

In order to mitigate the risks stemming from the utilization of mineral and synthetic organic substances,consensus exists in the literature that additional efforts should be devoted to the identification of adequate equivalent natural(ecological)*** work presents the outcomes of a preliminary study where the physical,mechanical,chemical and thermal properties of natural fibers have been ***,areca,and materials such as Moroccan doum and jute are *** a case study,a brake pad based on natural fibers is critically assessed.

关键词： Areca fiber doum fiber(Dwarf palm) jute fiber natural materials natural fibers palm fiber fiber’s properties

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Influence of Polyester Resin Treatment on jute Fabrics for Geotextile Applications

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Journal of Textile Science and Technology 2016年第4期2卷 67-80页

作者： Joykrisna Saha Subrata Chandra Das Mahbubur Rahman Md. Abu Bakar Siddiquee Mubarak Ahmad Khan Department of Textile Engineering Mawlana Bhashani Science and Technology University Tangail Bangladesh Pabna Textile Engineering College Pabna Department of Textiles Ministry of Textiles & Jute Dhaka Bangladesh Bangladesh Atomic Energy Commission Dhaka Bangladesh

In this study, jute woven fabrics (1 × 1 plain, twill, zigzag and diamond weave) were manufactured from 100% raw jute yarn. The fabric specimens were treated by 5%, 10%, 15%, 20% and 25% unsaturated polyester resin where styrene monomer used as a solvent and 1% methyl ethyl ketone peroxide (MEKP) was used as initiator. Two bar pressure was applied for complete wetting of the fabric by a Padder and curing was done at 130?C for 10 minutes. The physico-mechanical characteristics of untreated and treated samples were examined and evaluated. It was revealed that moisture content (MC) and water absorbency of the treated specimens were decreased with the increase of resin percentage (%) in the fabrics. MC and water absorbency were maximum decreased up to 50.23% and 60.14% respectively by 25% resin treatment. On the other hand, bending length (BL), flexural rigidity (FR), flexural modulus (FM) and tensile strength (TS) were enhanced with the increase of resin percentage in the fabrics which resulted higher fabric stiffness. The maximum improvement of BL, FR, FM and TS were found to be 6.67%, 56.04%, 10.57% and 18.75% respectively in comparison to untreated sample. Soil degradation tests exhibited that 33.59% TS loss occurred for untreated specimens where only 8.04% loss of TS found for 25% resin treated one. Furthermore, jute based twill, zigzag and diamond fabrics were also treated by 10%, 15%, 20% and 25% resin, then measured their TS and compared with plain fabrics. It was revealed that plain fabrics have superior TS over other fabrics. It was also evident that TS enhanced for all the fabrics after resin treatment and maximum increase found for all the fabrics up to 25% resin treatment.

关键词： jute fiber Woven Fabrics Polyester Resin Tensile Strength Geotextiles

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A Study of the Formation Mechanism of Flame Retardant Functional Layer on the Surface of jute

A Study of the Formation Mechanism of Flame Retardant Functi...

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2011中国材料研讨会

作者： Cancan Wang 1,2,Bingshe Xu 1,2,Liqiao Wei 1,2 (1 College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024 2 Key Laboratory of Interface Science and Engineering in Advanced Materials,Ministry of Education,Taiyuan University of Technology,Taiyuan 030024)

This paper synthesizes a kind of phosphorus flame retardant -allyl dimethyl *** retardant functional layer comes into being on the surface of jute by integrating ultraviolet ray （UV） radiation with *** functional layer was analyzed by Fourier transform infrared spectroscopy （FTIR）,scanning electron microscopy （SEM）,thermogravimetry （TG）,differential thermal analyzer （DTA）,and X-ray diffractometer （XRD）.The results indicate that UV radiation promotes the formation of free radicals on the jute’s surface,which are liable to produce grafting reaction with phosphate *** leads to the formation of flame retardant functional layer in the form of valence bond so that the processed jute possesses lasting flame retardant *** combustion testing,the combustion performance reaches to B 2 level of GB 8624-1997 Classification on Burning Behaviour for Building *** addition,the formation mechanism and flame-retardant mechanism of functional layer on the surface of jute has laid theoretical research foundation for the material design and controlled craft of jute fiber’s *** evaluation on the feeling of jute and the elements that affect the hand feeling are analyzed.

关键词： jute fiber surface flame retardent functional layer formation mechanism

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Packaging Bags of Peanuts with Function of Prevention of Aflatoxin B

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Journal of Donghua University(English Edition) 2013年第5期 378-381页

作者：吴海波靳向煜王洪 Key Laboratory of Textile Science and Technology Ministry of EducationDonghua University

Packaging bags composited with barrier film and moisture absorbent nonwoven fabrics were prepared in order to design a kind of functional bag which could prevent the contamination of aflatoxin B1of peanuts. The internal relative humidity( RH) of packaging bags with peanuts was monitored. The influences of the superabsorbent fiber( SAF) and jute fiber were investigated and the mechanism was analyzed.

关键词： packaging bag jute fiber super-absorbent fiber(SAF) isothermal moisture absorption

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基于化学脱胶对孟加拉黄麻纤维性能的研究

基于化学脱胶对孟加拉黄麻纤维性能的研究

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作者： Mohaimen Ali（华盛）东华大学

学位级别：硕士

黄麻是天然韧皮纤维,由纤维素、半纤维素、木质素、果胶、脂肪、灰分和树胶组成。黄麻纤维很长,是一种天然长丝纤维,手感柔软,光泽明亮。黄麻的用途多种多样,包括服装、土工织物、家用纺织品和高技术纺织品等。和所有其他纤维一样,黄麻... 详细信息

黄麻是天然韧皮纤维,由纤维素、半纤维素、木质素、果胶、脂肪、灰分和树胶组成。黄麻纤维很长,是一种天然长丝纤维,手感柔软,光泽明亮。黄麻的用途多种多样,包括服装、土工织物、家用纺织品和高技术纺织品等。和所有其他纤维一样,黄麻制品的质量很大程度上取决于原材料的质量。黄麻纤维的整体质量取决于如强度、延伸率、细度、长度和柔韧性等参数。黄麻纤维是天然纤维,表面不均匀并且覆盖一层使用中不需要的材料。树胶和木质素的成功去除是进一步工业加工和科学研究的第一步。为了去除这些不必要的树胶,使纤维更光滑,必须进行化学处理。黄麻纤维在纤维素和半纤维素之间存在木质素,它充当纤维素和半纤维素之间的胶结剂。其结果是,主体结构变得坚固、刚性和一体性。本研究设计的原材料从孟加拉进口的,纤维呈束状。采用化学脱胶的方法制备黄麻纤维。有许多方法可用于化学脱胶如碱处理、漂白处理,乙酰化处理、苯甲酰化处理等,它们都有各自的优点和缺点。我们在使用低温下长期温和的化学药剂来处理黄麻。其目的是除去树胶、木质素和其他杂质,但保持纤维素含量不变。研究内容包括拉伸强度、细度、含水量、回潮率、表面观察和内部化学分析SEM、FTIR等性能测试。首先对试验样品进行清洗,然后进行碱性、煮练和漂白处理。处理后与对照样品和处理样品进行比较。从实验数据中我们发现纤维具有较好的强度、细度和色泽,同时通过扫描电镜观察,纤维表面变得干净光滑。FTIR分析表明各组间的化学键发生了显著的变化。值得一提的是,孟加拉被誉为“黄金纤维之乡”,其单产、品质、品种、色彩和商业价值都是最高的。由于多雨、地势低洼、灌溉支持、人力等原因,该地非常适合种植黄麻。近几十年来,随着科学技术的发展和栽培技术的进步,黄麻的产量有所增加,但黄麻的市场占有率、重要性和前景却在逐渐丧失。此外,黄麻与孟加拉国的文化和历史交织在一起。大部分黄麻和相关工业都位于这些国家。孟加拉、印度和中国共同贡献了超过99%的世界生产。孟加拉是世界上唯一的黄麻纤维出口国。

关键词： jute fiber degumming physical properties FTIR SEM

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