Hierarchically oriented structure and enhanced toughness achieved by in situ microfibrillation of Polymethyl Methacrylate and Polyacrylate@rGO microspheres

Ji-cheng, Wang; Song, Ling; Ashish, Roy; Cui, Zhonglan; Zhu, Chenkai; Qi, Dongming

doi:10.1016/j.compscitech.2021.109244

Cited by 6 publications

(7 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, a large number of PMHNTs were exposed on the longitudinal cross‐section of the composite fiber when the contents of PMHNTs were further improved, implying that a large number of PMHNTs were stripped from the microfibril, as shown in Figure 10e,f. And it would lead to the decline of the toughness of the composite fiber 28,29 . Although the exfoliated PMHNTs reduced the strength of microfibrils in the composite fibers, it had a good strengthening effect on PMMA, which improved the tensile strength and reduced the elongation at break of the composite fibers.…”

Section: Resultsmentioning

confidence: 99%

“…And it would lead to the decline of the toughness of the composite fiber. 28,29 Although the exfoliated PMHNTs reduced the strength of microfibrils in the composite fibers, it had a good strengthening effect on PMMA, which improved the tensile strength and reduced the elongation at break of the composite fibers. Therefore, appropriate PMHNTs content can effectively improve the strength of microfibrils and the toughness of the composite fibers.…”

Section: Effect Of Pmhnts Contents On Mechanical Properties Of the Co...mentioning

confidence: 99%

“…Therefore, appropriate PMHNTs content can effectively improve the strength of microfibrils and the toughness of the composite fibers. [28][29][30]…”

Section: Effect Of Pmhnts Contents On Mechanical Properties Of the Co...mentioning

confidence: 99%

See 2 more Smart Citations

Preparation of poly (styrene‐methyl methacrylate)@grafted halloysite microspheres and the properties of its composite fibers

Yan

Song

Zhu

et al. 2022

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

It has become a hotspot that microfibrils with a high aspect ratio have a good reinforcement effect on the composite fibers. To prepare the micro‐fibrillation composite fibers with excellent performance and good dispersity, poly (styrene‐methyl methacrylate)@grafted halloysite nanotubes(PSM@PMHNTs) microspheres were prepared by suspension polymerization method, and the PSM@PMHNTs reinforced composite fibers were prepared by simple blending with polymethylmethacrylate (PMMA). The structure and mechanical properties of the composite fibers were studied by transmission electron microscopy, scanning electron microscopy, dynamic thermo‐mechanical analysis, and universal material testing machine. The results showed that polystyrene grafted halloysite nanotubes (PMHNTs) had good hydrophobicity and were successfully embedded in poly (styrene‐methyl methacrylate) (PSM). The mechanical performance of microfibril composite fiber with PSM@PMHNTs is better when compared that with PMHNTs and PSM, and the elongation at break of the composite fiber has dramatically increased by 120.90% compared to that of pure PMMA. In addition, the mechanical properties of the composite fibers were increased firstly and then decreased with the increase of PMHNTs contents and draft ratios, while the glass transition temperature of the composite fibers had no obvious changes. The composite fiber has the best mechanical properties when the content of PMHNTs is 1.0 wt% and the draft ratio is 6, and the tensile strength and elongation at break were 26.94% and 256.36% higher than that of pure PMMA, respectively.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Effect Of Pmhnts Contents On Mechanical Properties Of the Co...mentioning

confidence: 99%

See 1 more Smart Citation

Preparation of poly (styrene‐methyl methacrylate)@grafted halloysite microspheres and the properties of its composite fibers

Yan

Song

Zhu

et al. 2022

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

show abstract

“…The gel rate of the microspheres was measured by soxhlet extraction and calculated according to previous work. 26,27 The morphology of PAcr microspheres and the PMMA/PAcr composites were observed by Scanning electron microscope (Zeiss, Gemini SEM 500). All the samples were coated with gold and the figures were taken with accelerating voltage at 3 KV.…”

Section: Characterizationmentioning

confidence: 99%

“…24,25 In our previous work, the crosslinked microspheres confined the fillers in dispersed phase and induced the filler particles to form oriented alignment, such oriented structure enhanced the toughness of composite fiber without sacrificing tensile strength. 26 It was found that, however, the sturdy crosslinking network exhibited small deformation during the shearing/stretching process, resulting in lower aspect ratio of the nanofibrils and lower enhancement efficiency. As well as know, the strategy to manipulate the crosslinking network structure, adaptability to dynamic environments and network autonomy of dispersed phase polymer, as result to control the nanofibrillar morphology and mechanical properties of nanofibrillar composites is rarely reported.…”

Section: Introductionmentioning

confidence: 99%

In situ nanofibrillar composite fiber: A model system for understanding the structural evolution of crosslinked nanofibrils

Wang

Zhang

et al. 2023

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

In situ formed nanofibrils, which are formed from the deformation of dispersed phase polymer during the shearing/stretching process, offer exciting opportunities for large scale manufacture of materials with high strength and toughness. However, how the topological structure, especially crosslinking network structure of dispersed phase polymer, affects the structural evolution of nano/microfibrils is remaining unclear. Here, the nanofibrillar morphology of nanofibrillar composite fibers is manipulated via controlling the crosslinking network structure of dispersed phase. By changing the length of crosslinker and mol ratio of crosslinkers, the diameter of nanofibrils can be controlled. The rheological property of the crosslinked microspheres and corresponding morphology of in situ formed nanofibrils confirm that the inhomogeneous crosslinking network shows lower storage modulus and consistency coefficient, leading to higher deformation adaptability of crosslinking network and smaller diameter of the nanofibrils. The distribution of nanofibrils along the axial direction of composite fiber greatly improved the tensile strength and toughness of composite fiber to 74 MPa and 719 MJ/m3, which are 45% and 180% increasement compared with the counterpart pure PMMA fiber. The findings in current study provide a new strategy to control the nanofibrillar morphology by increasing the heterogeneity of crosslinking network structure of the dispersed phase polymer.

show abstract

In Situ Growth of Highly Compatible Cu₂O‐GO Hybrids Via Amino‐Modification for Melt‐Spun Efficient Antibacterial Polyamide 6 Fibers

Wang,

Zhou,

Xiang

et al. 2024

Macromol. Rapid Commun.

View full text Add to dashboard Cite

Polyamide 6 (PA6) fiber has the advantages of high strength and good wear resistance. However, it is still challenging to effectively load inorganic antibacterial agents into polymer substrates without antimicrobial activity. In this work, graphene oxide is used as a carrier, which is modified with an aminosilane coupling agent (AEAPTMS) to enhance the compatibility and antimicrobial properties of the inorganic material, as well as to improve its thermal stability in a high‐temperature melting environment. Cuprous oxide‐loaded aminated grapheme (Cu2O‐GO‐NH2) is constructed by in situ growth method, and further PA6/Cu2O‐GO‐NH2 fibers are prepared by in situ polymerization. The composite fiber has excellent washing resistance. After 50 times of washing, its bactericidal rates against Bacillus subtilis and Escherichia coli are 98.85% and 99.99%, respectively. In addition, the enhanced compatibility of Cu2O‐GO‐NH2 with the PA6 matrix improves the orientation and crystallinity of the composite fibers. Compared with PA6/Cu2O‐GO fibers, the fracture strength of PA6/Cu2O‐GO‐NH2 fibers increases from 3.0 to 4.2 cN/dtex when the addition of Cu2O‐GO‐NH2 is 0.2 wt%. Chemical modification and in situ concepts help to improve the compatibility of inorganic antimicrobial agents with organic polymers, which can be applied to the development of medical textiles.

show abstract

Hierarchically oriented structure and enhanced toughness achieved by in situ microfibrillation of Polymethyl Methacrylate and Polyacrylate@rGO microspheres

Cited by 6 publications

References 46 publications

Preparation of poly (styrene‐methyl methacrylate)@grafted halloysite microspheres and the properties of its composite fibers

Preparation of poly (styrene‐methyl methacrylate)@grafted halloysite microspheres and the properties of its composite fibers

In situ nanofibrillar composite fiber: A model system for understanding the structural evolution of crosslinked nanofibrils

In Situ Growth of Highly Compatible Cu₂O‐GO Hybrids Via Amino‐Modification for Melt‐Spun Efficient Antibacterial Polyamide 6 Fibers

Contact Info

Product

Resources

About

Hierarchically oriented structure and enhanced toughness achieved by in situ microfibrillation of Polymethyl Methacrylate and Polyacrylate@rGO microspheres

Cited by 6 publications

References 46 publications

Preparation of poly (styrene‐methyl methacrylate)@grafted halloysite microspheres and the properties of its composite fibers

Preparation of poly (styrene‐methyl methacrylate)@grafted halloysite microspheres and the properties of its composite fibers

In situ nanofibrillar composite fiber: A model system for understanding the structural evolution of crosslinked nanofibrils

In Situ Growth of Highly Compatible Cu2O‐GO Hybrids Via Amino‐Modification for Melt‐Spun Efficient Antibacterial Polyamide 6 Fibers

Contact Info

Product

Resources

About

In Situ Growth of Highly Compatible Cu₂O‐GO Hybrids Via Amino‐Modification for Melt‐Spun Efficient Antibacterial Polyamide 6 Fibers