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Lin, C. B.; Wu, Licheng; Chou, Yi-Chun

doi:10.1023/a:1024414030765

Cited by 11 publications

(2 citation statements)

References 6 publications

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“…Though many healing agents may be useful in the design of a self-healing additively manufactured polymer structure, we have chosen to leverage a single-part solvent-welding technique. With proper agent sequestration in the material, the solvent remains stable for long periods of time and has a high healing efficacy [34][35][36]. When delivered to the crack plane, the solvent lowers the glass transition temperature of the material, allowing the long polymer molecules on either side of the crack to reptate and intertwine, thereby healing the damage that was present [37].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of a vascularized, self-healing structure fabricated via material extrusion

Turicek¹,

Kowal²,

Holland³

et al. 2022

Smart Mater. Struct.

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Material extrusion is a versatile 3D-printing platform for building complex one-off designs. However, the mechanical properties of parts printed using material extrusion are limited by the weak bonding between successive layers of the print, causing premature failure at these critical locations. In this work, an additively manufactured component is crafted which incorporates internal vascular channels capable of autonomously delivering a one-part healing agent to the site of interlaminar damage, when and where it occurs thereby restoring the base structure. The effectiveness of fracture toughness restoration was investigated for various healing times and healing agents. Healing efficiencies of greater than 100% are reported for experimental-type samples using acetone as the healing agent while control specimens using a non-solvent agent demonstrated no recovery. Fractography of damaged surfaces via optical imaging and scanning electron microscopy revealed multiple healing mechanisms that are discussed herein. Lastly, biological analogies and the viability of our design in application are discussed.

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Section: Introductionmentioning

confidence: 99%

Evaluation of a vascularized, self-healing structure fabricated via material extrusion

Turicek¹,

Kowal²,

Holland³

et al. 2022

Smart Mater. Struct.

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show abstract

“…However the application of pure PVC in engineering is limited by its low toughness and heat‐distortion temperature . Although the intrinsic brittleness of PVC can be overcome by incorporating some resins , the mechanical strength decreases. Therefore functional fillers are urgently required to improve the toughness on condition that the mechanical strength doesn't decrease.…”

Section: Introductionmentioning

confidence: 99%

Surface modification of magnesium hydroxide sulfate hydrate whiskers and its toughness and reinforcement for polyvinyl chloride

et al. 2017

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In order to enhance the adhesion and compatibility of magnesium hydroxide sulfate hydrate (MHSH) whiskers with polyvinyl chloride (PVC), and prepare high performance MHSH/PVC composites, chitosan (CS) is coated on the surface of MHSH whiskers by a facile method. The effect of the CS‐coated MHSH (CS‐MHSH) whisker and its toughness and reinforcement for PVC are studied. A thin layer coated on the surface of MHSH whiskers after modification is investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The efficacy of surface modification is confirmed by fourier transform infrared spectroscopy (FTIR), X‐ray power diffraction analyses (XRD) and energy disperse spectroscopy (EDS). The optimum modification concentration of CS is 0.025%. The notched impact strength and flexural modulus of PVC composite with 15 phr CS‐MHSH whiskers are increased by 85.5% and 58.5% compared with those of pure PVC, and by 48.3% and 4.1% compared with those of the PVC composite with 15 phr unmodified MHSH whiskers. A better thermal stability of CS‐MHSH/PVC composite is showed by thermogravimetric analysis (TGA). Dynamic mechanical analysis (DMA) result indicates that CS‐MHSH whiskers have a better dispersion and a stronger interfacial adhesion with PVC matrix. POLYM. COMPOS., 39:3676–3685, 2018. © 2017 Society of Plastics Engineers

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Microwave irradiation treatment of wood flour and its application in PVC-wood flour composites

Chen

Liu

et al. 2007

J. Wuhan Univ. Technol.

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The technique of microwave irradiation induced free radical bulk-polyaddition reactions in porous wood flour was used to modify wood flour. The behaviors of the modified wood flour under microwave irradiation, such as thermal stability and moisture sorption properties, were studied. A kind of semiinterpenetrating polymer network wood four (Semi-IPN-WF) can be formed through polymerization of MMA in the porous wood fl our by microwave irradiation, and the thermal decomposition temperature of the semi-IPN-WF is considerably increased. PVC/Semi-IPN-WF composites were prepared by melt mixing in double rolls, which exhibit improved rheological properties, lower water sorption properties and outstanding mechanical performances.

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Untitled

Cited by 11 publications

References 6 publications

Evaluation of a vascularized, self-healing structure fabricated via material extrusion

Evaluation of a vascularized, self-healing structure fabricated via material extrusion

Surface modification of magnesium hydroxide sulfate hydrate whiskers and its toughness and reinforcement for polyvinyl chloride

Microwave irradiation treatment of wood flour and its application in PVC-wood flour composites

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