Graphene enhanced low-density polyethylene by pretreatment and melt compounding

Lei, Hong; Liu, Zhuo; He, Chao; Zhang, Shouchun; Liu, Ye-Qun; Hua, Chengjie; Li, Xiaoming; Li, Feng; Chen, Cheng-Meng; Cai, Rong

doi:10.1039/c6ra15702e

Cited by 33 publications

(16 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, although the graphene might be affecting the crystallite size and spherulite structure, the crystallinity degree can be considered constant, as it does not present any significant variation with the graphene content increase. This behavior has been reported in the literature for composites containing high loadings of graphene particles due to formation of aggregations that act as physical barriers interrupting the crystallization process [27].…”

Section: Results and Discussion Dsc Evaluation On Hdpe Crystallinity supporting

confidence: 65%

“…1. For the neat HDPE, the crystallization temperature (T c ) occurred at approximately 117 C and as the graphene content increased to 28 wt%, T c shifted to 122 C. This behavior could be an indicative that the graphene particles act as nucleating agent for this polymer [10,13,27]. Moreover, small peaks (shoulders) can be seen in addition to the main peak at high graphene loadings (starting from 10 wt%).…”

Section: Results and Discussion Dsc Evaluation On Hdpe Crystallinity mentioning

confidence: 99%

See 1 more Smart Citation

Mass‐produced graphene—HDPE nanocomposites: Thermal, rheological, electrical, and mechanical properties

Batista

Helal

Kurusu

et al. 2018

Polymer Engineering & Sci

View full text Add to dashboard Cite

Economically viable high‐density polyethylene (HDPE)/graphene nanocomposites were produced using mass produced graphene powder and an industrial twin‐screw melt‐compounding machine. Rheological and electrical properties were investigated and scanning electron microscopy was carried out to investigate graphene dispersion and its network formation in the matrix. Mechanical properties of the nanocomposites were evaluated using tensile, flexural and impact tests. Differential scanning calorimetry analysis indicated that the crystalline structure of the polymer might be affected by high loadings of graphene. SEM evaluation revealed reasonable graphene dispersion in the matrix. In addition, the amount of graphene required to form a percolated network was similar for both rheological and electrical networks. The nanocomposites exhibited a significant increase in Young's and flexural moduli without a notable reduction in impact strength up to 14 wt% graphene loading. In these experiments, compounding graphene powder with HDPE produced a clear and distinct improvement in mechanical properties at an industrially suitable low cost. POLYM. ENG. SCI., 59:675–682, 2019. © 2018 Society of Plastics Engineers

show abstract

Section: Results and Discussion Dsc Evaluation On Hdpe Crystallinity supporting

confidence: 65%

Section: Results and Discussion Dsc Evaluation On Hdpe Crystallinity mentioning

confidence: 99%

Mass‐produced graphene—HDPE nanocomposites: Thermal, rheological, electrical, and mechanical properties

Batista

Helal

Kurusu

et al. 2018

Polymer Engineering & Sci

View full text Add to dashboard Cite

show abstract

“…The appeared peaks were found to be fixed in their locations, indicating adequate exfoliation of polymer chains and poor particles agglomerations. 53…”

Section: Dispersion Of Cb In Ldpe Investigating By Xrdmentioning

confidence: 99%

Electrical and thermal phenomena in low‐density polyethylene/carbon black composites near the percolation threshold

Azizi

David

Fréchette

et al. 2018

J of Applied Polymer Sci

View full text Add to dashboard Cite

Low-density polyethylene (LDPE)/carbon black (CB) composites were fabricated via meltcompounding technique. The percolation threshold was found to be around 20 wt% CB, and an electrical network formed by conductive CB was proven by SEM investigation. Dielectric responses depicted an interfacial relaxation peak at 20 wt% CB content. LDPE/CB composites showed an electric field-dependent conductivity as well as a hysteresis behavior around the percolation threshold region. The CB particles with high thermal conductivity increased the heat conductance of the LDPE/CB20 up to 56%. The dynamic mechanical analysis (DMA) of the LDPE/CB composites exhibited a noticeable contribution of CB throughout the composites, increasing the storage and loss modulus. The physical interactions between CB particles in the

show abstract

“…Lei et al prepared graphene-enhanced low-density polyethylene by pretreating and the melt-compounding method, and revealed its thermal stability and improved mechanical properties by scanning electron microscopy, Raman spectra etc. [ 47 ]. Bu et al explored the advancement of antioxidant functionalized graphene oxide filler in promoting the thermal stability and retaining the electrical insulating properties of low-density polyethylene [ 48 ].…”

Section: Introductionmentioning

confidence: 99%

A density functional theory study of the role of functionalized graphene particles as effective additives in power cable insulation

et al. 2018

View full text Add to dashboard Cite

The role of a series of functionalized graphene additives in power cable insulation in suppressing the growth of electrical treeing and preventing the degradation of the polymer matrix has been investigated by density functional theory calculations. Bader charge analysis indicates that pristine, doped or defect graphene could effectively capture hot electrons to block their attack on cross-linked polyethylene (XLPE) because of the π–π conjugated unsaturated structures. Further exploration of the electronic properties in the interfacial region between the additives and XLPE shows that N-doped single-vacancy graphene, graphene oxide and B-, N-, Si- or P-doped graphene oxide have relatively strong physical interaction with XLPE to restrict its mobility and rather weak chemical activity to prevent the cleavage of the C–H or C–C bond, suggesting that they are all potential candidates as effective additives. The understanding of the features of functionalized graphene additives in trapping electrons and interfacial interaction will assist in the screening of promising additives as voltage stabilizers in power cables.

show abstract

Graphene enhanced low-density polyethylene by pretreatment and melt compounding

Abstract: The addition of graphene can improve the order of the molecular chain and the macroscopic properties of the polyethylene.

Cited by 33 publications

References 37 publications

Mass‐produced graphene—HDPE nanocomposites: Thermal, rheological, electrical, and mechanical properties

Mass‐produced graphene—HDPE nanocomposites: Thermal, rheological, electrical, and mechanical properties

Electrical and thermal phenomena in low‐density polyethylene/carbon black composites near the percolation threshold

A density functional theory study of the role of functionalized graphene particles as effective additives in power cable insulation

Contact Info

Product

Resources

About