Development of Trans-1,4-Polyisoprene Shape-Memory Polymer Composites Reinforced with Carbon Nanotubes Modified by Polydopamine

Zhang, Chuang; Li, Long; Xin, Yuanhang; You, Jiaqi; Zhang, Jing; Fu, Wanlu; Wang, Na

doi:10.3390/polym14010110

Cited by 10 publications

(5 citation statements)

References 47 publications

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“…This improvement can be attributed to the biochar's ability to reduce chain motion and thermal vibration, acting as an effective thermal stabilizer and preventing the complete thermal deterioration of LDPE. Similar findings have been reported in other studies that investigated the reinforcement of polymer composites with carbon structure additions [43,44]. increased, it correspondingly increased the hardness levels.…”

Section: Thermogravimetric Analysis (Tga)supporting

confidence: 90%

Ecofriendly Biochar as a Low-Cost Solid Lubricating Filler for LDPE Sustainable Biocomposites: Thermal, Mechanical, and Tribological Characterization

Abdo,

Alnaser,

Seikh

et al. 2023

International Journal of Polymer Science

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The potential of ecofriendly biochar, a carbon-rich byproduct of biomass pyrolysis, as a low-cost solid lubricating filler for low-density polyethylene (LDPE) sustainable biocomposites is investigated in this work. Tensile strength, hardness, thermogravimetric analysis (TGA), melting flow index (MFI), tensile test, flexural test, and frictional tests were used to characterize the biocomposites’ mechanical, thermal, and tribological properties. Energy-dispersive X-ray spectroscopy (EDS) was used to assess the chemical composition of the biochar, while field-emission scanning electron microscopy (FESEM) was used to capture the biochar morphology. The results showed that the incorporation of biochar in LDPE matrix increased the mechanical characteristics of the biocomposites and resulted in a significant increase in tensile strength, flexural strength, and hardness. More specifically, the LDPE+10 wt% composite outperformed the pure LDPE matrix by 1.9% in tensile strength and 47% in flexural strength. Furthermore, integrating biochar into LDPE composites enhances thermal stability, lowers the melt flow index (MFI), and boosts the hardness by 24.3% for the composite with 10% biochar content. Furthermore, biochar improves wear resistance and durability, with the LDPE10 composite exhibiting a friction coefficient that is 56.3% lower than pure LDPE. These findings indicate that biochar is a viable, cost-effective, and environmentally friendly filler for improving the performance of LDPE-based biocomposites for many varieties of applications.

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Section: Thermogravimetric Analysis (Tga)supporting

confidence: 90%

Ecofriendly Biochar as a Low-Cost Solid Lubricating Filler for LDPE Sustainable Biocomposites: Thermal, Mechanical, and Tribological Characterization

Abdo,

Alnaser,

Seikh

et al. 2023

International Journal of Polymer Science

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show abstract

“…(1) Differential scanning calorimetry analysis was carried out using a Q20, TA, USA. Holding 7-8 mg of the sample at 80 °C for 3 min to eliminate the thermal history of the sample, and then the samples were cooled to −50 °C, thermostated for 5 min and then heated to 80 °C [36]. All steps are carried out in a nitrogen atmosphere with a controlled nitrogen output pressure of around 0.1 MPa and a temperature scan rate of 10 °C/min.…”

Section: Crystallization Propertiesmentioning

confidence: 99%

The effect of organic clay on the properties of TPI/NR composite materials

Zhang,

Liang,

Jia

et al. 2024

Phys. Scr.

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TPI shape memory materials' low flexibility and poor mechanical properties currently limit their use in a broader range of applications. Most scholars use high performance fillers to improve their mechanical properties. However, the cost of high-performance fillers is high. Therefore, the introduction of flexible natural rubber (NR) and low-cost organic clay (OC) into the trans-1,4-polyisoprene (TPI) matrix as the reinforcing phase. A new shape memory polymer— TPI/NR/OC, was prepared by mechanical melt blending. The effect of the changes of filler content on the thermodynamic properties of the composite materials were revealed by series of tests. The results showed that OC formed a homogeneous intercalation structure with the composite matrix, and OC promoted the crystallization of TPI, and part of OC was able to form physical entanglements with the molecular chains of the composites, which led to the improvement of mechanical and shape memory properties. The tensile strength of the composite at an OC dosage of 3.6phr was 19.9MPa, with a shape fixity ratio of 97.9% and a shape recovery ratio of 96.8%. The relevant findings of this research may provide valuable design references for more areas of application of shape memory composites.

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“…Therefore, the incorporation of inorganic llers as reinforcing agents in matrix materials with shape memory has become a dominant trend in SMPs today [12][13][14][15]. Common inorganic llers include carbon black (CB), silica (SiO2) carbon nanotubes (CNTs), graphene and its oxides (GO), calcium carbonate (CaCO3), carbon bers (CF), etc [16][17][18][19][20]. Organic clay (OC) can increase the tensile strength of nontensile crystalline rubber by several times due to its abundance, cheapness, and unique lamellar structure, and it has a good reinforcing function when added in small amounts [21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

The shape memory performance of the dynamically vulcanized TPV nanocomposites of trans-isoprene/ low-density polyethylene and organoclay

Zhang,

Jia,

Shen

et al. 2024

J Polym Res

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Triple shape memory materials currently have a wide range of applications in aerospace and healthcare, however, the lack of their mechanical properties limits their wider application. In order to overcome the problem of low mechanical properties of the triple shape memory composites, in this study, organoclay (OC), which is low-cost and has an intercalation-type structure, was introduced as a reinforcing phase in a trans-isoprene (TPI) with regular molecular chains and a low-crosslinking low-density polyethylene (LDPE) matrix. TPI/LDPE/OC shape memory composites (SMP) were prepared by melt blending and vulcanized by dynamic vulcanization technique. Since different OC contents have different effects on the properties of the composites, it is particularly important to select the appropriate OC content. A series of experiments were conducted to reveal the effect of OC content on the mechanical and shape memory properties of TPI/LDPE/OC composites. The results show that OC can form a stable and homogeneous intercalation structure in the composites when the OC incorporation amount is 2 phr, and the mechanical properties and triple shape memory properties of the composites are optimized. This study demonstrates that OC can improve the crystallinity and cross-linking of TPI/LDPE composites, thus providing potential value for the study of multiple shape memory material applications.

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Development of Trans-1,4-Polyisoprene Shape-Memory Polymer Composites Reinforced with Carbon Nanotubes Modified by Polydopamine

Cited by 10 publications

References 47 publications

Ecofriendly Biochar as a Low-Cost Solid Lubricating Filler for LDPE Sustainable Biocomposites: Thermal, Mechanical, and Tribological Characterization

Ecofriendly Biochar as a Low-Cost Solid Lubricating Filler for LDPE Sustainable Biocomposites: Thermal, Mechanical, and Tribological Characterization

The effect of organic clay on the properties of TPI/NR composite materials

The shape memory performance of the dynamically vulcanized TPV nanocomposites of trans-isoprene/ low-density polyethylene and organoclay

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