3D Printing of dynamic tissue scaffold by combining self-healing hydrogel and self-healing ferrogel

Additive manufacturing has significantly changed polymer science and technology by engineering complex material shapes and compositions. With the advent of dynamic properties in polymeric materials as a fundamental principle to achieve, e.g., self-healing properties, the use of supramolecular chemistry as a tool for molecular ordering has become important. By adjusting molecular nanoscopic (supramolecular) bonds in polymers, rheological properties, immanent for 3D printing, can be adjusted, resulting in shape persistence and improved printing. We here review recent progress in the 3D printing of supramolecular polymers, with a focus on fused deposition modelling (FDM) to overcome some of its limitations still being present up to date and open perspectives for their application.

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On 3D printing of electro-active PVDF-Graphene and Mn-doped ZnO nanoparticle-based composite as a self-healing repair solution for heritage structures

Proceedings of the Institution of Mechanical Engineers Part B Journal of Engineering Manufacture ◽

10.1177/09544054211060912 ◽

2021 ◽

pp. 095440542110609

Author(s):

Vinay Kumar ◽

Rupinder Singh ◽

Inderpreet Singh Ahuja

Keyword(s):

3D Printing ◽

Polyvinylidene Fluoride ◽

Nano Particles ◽

Zno Nanoparticle ◽

Self Healing ◽

Fused Deposition ◽

Crack Repair ◽

3D Printed ◽

Doped Zno ◽

Mn Doped

Construction is the part of human activity which is directly linked to urbanization for moving ahead on the path of growth and prosperity. Construction activities in past centuries are now part of our precious heritage. The repair and maintenance of heritage structures are of great importance for present-day researchers. One of the most common damage these century-long constructions faces are in form of surface cracks. In the present study, investigations were performed for a 3D printing-based customized solution for crack repair and maintenance of heritage structures. In this study, polyvinylidene fluoride (PVDF) polymer was reinforced with graphene (Gr) and Mn-doped ZnO nano-particles to prepare a smart composite material for crack repair and restoration. The composite was successfully 3D printed on fused deposition modeling (FDM) based 3D printer after investigating its rheological, thermal, and mechanical properties. The in-house developed composite was tested for smart characteristics to use as a programmable solution for filling cracks. The piezoelectric property and dielectric constant of 3D printed disk-shaped composite (PVDF-Gr-Mn-ZnO) were obtained after DC poling (to be used as stimulus) of the functional prototype. The results of the study suggest that the electro-active nature, volumetric change, and charge storing capacity of the additively manufactured composite may be used practically to acquire the shape of cavity/crack present in the constructed wall and repair the damages that occurred in a heritage site. The photoluminescence (PLS) and atomic force microscopy (AFM) analysis was used to ascertain the properties of the prepared composite. Also, the results obtained from the morphological analysis are reported to support the outcomes of the research.

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A Photoinduced Dual‐Wavelength Approach for 3D Printing and Self‐healing of Thermosetting Materials

Angewandte Chemie ◽

10.1002/ange.202114111 ◽

2021 ◽

Author(s):

Zhiheng Zhang ◽

Nathaniel Corrigan ◽

Cyrille Andre Jean Marie Boyer

Keyword(s):

3D Printing ◽

Dual Wavelength ◽

Self Healing

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3D printing of functional polymers for miniature machines

Multifunctional Materials ◽

10.1088/2399-7532/ac4836 ◽

2022 ◽

Author(s):

Neng Xia ◽

Dongdong Jin ◽

Veronica Iacovacci ◽

Li Zhang

Keyword(s):

3D Printing ◽

Control Strategies ◽

Functional Materials ◽

Functional Polymers ◽

Small Scale ◽

Self Healing ◽

Power Sources ◽

Miniature Robots ◽

Composite Polymers ◽

Printing Techniques

Abstract Miniature robots and actuators with micrometer or millimeter scale size can be driven by diverse power sources, e.g., chemical fuels, light, magnetic, and acoustic fields. These machines have the potential to access complex narrow spaces, execute medical tasks, perform environmental monitoring, and manipulate micro-objects. Recent advancements in 3D printing techniques have demonstrated great benefits in manufacturing small-scale structures such as customized design with programmable physical properties. Combining 3D printing methods, functional polymers, and active control strategies enables these miniature machines with diverse functionalities to broaden their potentials in medical applications. Herein, this review provides an overview of 3D printing techniques applicable for the fabrication of small-scale machines and printable functional materials, including shape-morphing materials, biomaterials, composite polymers, and self-healing polymers. Functions and applications of tiny robots and actuators fabricated by 3D printing and future perspectives toward small-scale intelligent machines are discussed.

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Highly stretchable, self-healing, and 3D printing prefabricatable hydrophobic association hydrogels with the assistance of electrostatic interaction

Polymer Chemistry ◽

10.1039/d0py00003e ◽

2020 ◽

Vol 11 (29) ◽

pp. 4741-4748

Author(s):

Heng Chen ◽

Beibei Hao ◽

Penghui Ge ◽

Shaojun Chen

Keyword(s):

3D Printing ◽

Electrostatic Interaction ◽

Methacrylic Acid ◽

Butyl Acrylate ◽

Hydrophobic Association ◽

Self Healing ◽

Ethyl Methacrylate ◽

Highly Stretchable ◽

Physically Crosslinked

Self-healing and 3D printing prefabricatable physically crosslinked hydrogels were prepared by copolymerization of butyl acrylate, 2-(dimethylamino)ethyl methacrylate, and methacrylic acid, followed by soaking in water.

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Smart polymers for cell therapy and precision medicine

Journal of Biomedical Science ◽

10.1186/s12929-019-0571-4 ◽

2019 ◽

Vol 26 (1) ◽

Cited By ~ 8

Author(s):

Hung-Jin Huang ◽

Yu-Liang Tsai ◽

Shih-Ho Lin ◽

Shan-hui Hsu

Keyword(s):

3D Printing ◽

Cell Therapy ◽

Shape Memory ◽

Precision Medicine ◽

Environmental Changes ◽

Memory Performance ◽

Soft Materials ◽

Smart Polymers ◽

Self Healing ◽

Thermally Responsive

Abstract Soft materials have been developed very rapidly in the biomedical field over the past 10 years because of advances in medical devices, cell therapy, and 3D printing for precision medicine. Smart polymers are one category of soft materials that respond to environmental changes. One typical example is the thermally-responsive polymers, which are widely used as cell carriers and in 3D printing. Self-healing polymers are one type of smart polymers that have the capacity to recover the structure after repeated damages and are often injectable through needles. Shape memory polymers are another type with the ability to memorize their original shape. These smart polymers can be used as cell/drug/protein carriers. Their injectability and shape memory performance allow them to be applied in bioprinting, minimally invasive surgery, and precision medicine. This review will describe the general materials design, characterization, as well as the current progresses and challenges of these smart polymers.

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