Enhancement of carbon nanotube fibres using different solvents and polymers

Li, Shan; Zhang, Xiaohua; Zhao, Jingna; Meng, Fancheng; Xu, Geng; Yong, Zhang; Jia, Jingjing; Zhang, Zuoguang; Li, Qingwen

doi:10.1016/j.compscitech.2012.05.013

Cited by 163 publications

(127 citation statements)

References 25 publications

Supporting

Mentioning

123

Contrasting

Unclassified

Order By: Relevance

“…Therefore, modifying interfaces to break the limit of existing inter-tube spacing is supposed to be a rational solution to enhance interfacial electrical and thermal conduction. Some pioneering endeavours of ours [[32]- [36]] and others [ [26], [30], [32], [37]- [40]] discovered that physical and chemical manipulations, specifically liquid infiltration into the internal spaces between contiguous bundles and bridging the interface with short covalently bonding molecules, respectively, could effectively improve the inter-bundle contact, resulting in significant increase in mechanical properties, such as the tensile strength. However, to the best of our knowledge, these manipulating mechanisms in inter-bundle interface have never been applied for the in-depth electrical and thermal design of efficient CNT assemblies, let alone quantitative tuning of electrical and thermal performance, which is highly anticipated for smart CNT assembly for future efficient energy system.…”

Section: Introductionmentioning

confidence: 99%

Functionalization and densification of inter-bundle interfaces for improvement in electrical and thermal transport of carbon nanotube fibers

Qiu

Wang

Tang

et al. 2016

Carbon

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Functionalization and densification of inter-bundle interfaces for improvement in electrical and thermal transport of carbon nanotube fibers

Qiu

Wang

Tang

et al. 2016

Carbon

Self Cite

View full text Add to dashboard Cite

show abstract

“…Such value was very close to that for T300 (variation of 0.115-0.149 and average of 0.134), see Figure 3a. The infiltrated thermosetting BMI resins formed cross-lined polymer network within CNT fibers by a curing process, 14 and such networking effect further suppressed the sliding tendency. By considering the high tensile strength (up to 2.47 GPa) and high modulus (up to 110-140 GPa), 14,29 the CNT/BMI composite fiber can be used as excellent high quality factor materials.…”

Section: 28mentioning

confidence: 99%

“…The first attention was paid to the three "pure" CNT fibers, namely the iCVD, dry-spun, and EG-densified fibers, where the CNT weight percent was over at least 95%. 14,22 The iCVD and dry-spun CNT fiber had the highest loss tangents, averages of 0.229 and 0.218 at 100 Hz, respectively. When EG densification was introduced during the fiber spinning, 14 the averaged tan δ at 100 Hz decreased to 0.178.…”

mentioning

confidence: 99%

“…Therefore, for the highly packed CNT assemblies, the introduction of thermoplastic or thermosetting polymers can be an efficient way to increase or decrease the loss tangent (while the tensile strength and modulus were both improved upon the polymer infiltration 14 ), and can be used for developing assembly fibers with a designed quality factor.…”

mentioning

confidence: 99%

“…14,28 In the present study, the array spinning without using any solvent (also called dry spinning), EG densification, PVA and PU infiltrations, and BMI infiltration and curing were used to produce the dry-spun, EG-densified, CNT/PVA, CNT/PU, and CNT/BMI fibers. All the parameters for the infiltration treatment was reported in our previous study.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Wide‐Range Tunable Dynamic Property of Carbon‐Nanotube‐Based Fibers

Zhao

Zhang

Pan

et al. 2015

Adv Materials Inter

Self Cite

View full text Add to dashboard Cite

Carbon nanotube (CNT) fiber is formed by assembling millions of individual tubes. The assembly feature provides the fiber with rich interface structures and thus various ways of energy dissipation, as reflected by the non-zero loss tangent (>0.028-0.045) at low vibration frequencies. A fiber containing entangled CNTs possesses higher loss tangents than a fiber spun from aligned CNTs. Liquid densification and polymer infiltration, the two common ways to increase the interfacial friction and thus the fiber's tensile strength and modulus, are found to efficiently reduce the damping coefficient. This is because the sliding tendency between CNT bundles can also be well suppressed by the high packing density and the formation of covalent polymer cross-links within the fiber. The CNT/bismaleimide composite fiber exhibited the smallest loss tangent, nearly as the same as that of carbon fibers. At a higher level of the assembly structure, namely a multi-ply CNT yarn, the inter-fiber friction and sliding tendency obviously influence the yarn's damping performance, and the loss tangent can be tuned within a wide range, as similar to carbon fibers, nylon yarns, or cotton yarns. The wide-range tunable dynamic properties allow new applications ranging from high quality factor materials to dissipative systems.Natural and synthetic fibers are used in many products and play a large role in everyday applications. Their mechanical properties are important both from the point of view of fiber processing in a technological process and their use in the form of final products. Besides the quasi-static properties including the fiber's tensile strength (σ f ), elastic modulus (E f ), and fracture toughness (J f ), the dynamic response to a periodic external signal (displacement or force) can be severe due to the energy dissipation.1 Obviously, frictional effects play a major role in the dynamic response. However, the types of friction differ greatly between a thread, yarn, and fiber due to their different assembly structures.Fiber is usually defined as a hair-like strand of material and is the smallest "visible" unit of a fabric. Natural fibers (cotton, flax, jute, bamboo, kapok, ramie, wool, silk, and spider silk) and synthetic fibers (nylon, glass fiber, cellulose fiber, and carbon fiber) usually have a width (diameter) ranging from several to tens of µm, and a length at least 100 times longer than the width. Yarn is a continuous length of interlocked fibers used for manufacturing textiles.2 At the uppermost structure level, threads are usually made by plying and twisting yarns, for efficient and smooth stitching in sewn products.When carbon nanotubes (CNTs) are assembled into a strand by a spinning process, 3-9 a new man-made or synthetic fiber is formed. A CNT fiber with a diameter of ∼10 µm usually contains more than 10 6 individual CNTs. Such assembly feature is different from those fibers well-known for many years which are usually a solid structure without internal interfaces. CNT fiber can also be considered as a continuous len...

show abstract

Assembly Dependent Interfacial Property of Carbon Nanotube Fibers with Epoxy and Its Enhancement via Generalized Surface Sizing

et al. 2015

Self Cite

View full text Add to dashboard Cite

In building up composite structures using carbon nanotube (CNT) fibers, the fiber-to-matrix interfacial shear strength (IFSS) is one of the most important issues. Originating from the assembly characteristics of CNT fiber, the IFSS strongly depends on the fiber's twisting level and densification level. Furthermore, there are rich ways to modify the fiber surface and thus enhance the IFSS, including the physical and chemical modification on fiber surface, the infiltration of matrix resin into CNT fiber, and the introduction of silane coupling agent. A new feature differing from carbon fibers is that all these treatments either change the fiber's surface structure or form a several-hundreds-nm-thick interphase inside rather than around the fiber. These "generalized" treatments obviously extend the common concept of surface sizing and can be used for various forms of CNT assembly structures.

show abstract

Enhancement of carbon nanotube fibres using different solvents and polymers

Cited by 163 publications

References 25 publications

Functionalization and densification of inter-bundle interfaces for improvement in electrical and thermal transport of carbon nanotube fibers

Functionalization and densification of inter-bundle interfaces for improvement in electrical and thermal transport of carbon nanotube fibers

Wide‐Range Tunable Dynamic Property of Carbon‐Nanotube‐Based Fibers

Assembly Dependent Interfacial Property of Carbon Nanotube Fibers with Epoxy and Its Enhancement via Generalized Surface Sizing

Contact Info

Product

Resources

About