다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

[신간의 별자리x] 우리/미술, 그리고 ‘슬픔의 박물관’

Freedom of design, mass customisation, waste minimisation and the ability to manufacture complex structures, as well as fast prototyping, are the main benefits of additive manufacturing (AM) or 3D printing. A comprehensive review of the main 3D printing methods, materials and their development in trending applications was carried out. In particular, the revolutionary applications of AM in biomedical, aerospace, buildings and protective structures were discussed. The current state of materials development, including metal alloys, polymer composites, ceramics and concrete, was presented. In addition, this paper discussed the main processing challenges with void formation, anisotropic behaviour, the limitation of computer design and layer-by-layer appearance. Overall, this paper gives an overview of 3D printing, including a survey on its benefits and drawbacks as a benchmark for future research and development.

Additive manufacturing (3D printing): A review of materials, methods, applications and challenges

Recently a new, large family of two-dimensional (2D) early transition metal carbides and carbonitrides, called MXenes, was discovered. MXenes are produced by selective etching of the A element from the MAX phases, which are metallically conductive, layered solids connected by strong metallic, ionic, and covalent bonds, such as Ti2AlC, Ti3AlC2, and Ta4AlC3. MXenes ­combine the metallic conductivity of transition metal carbides with the hydrophilic nature of their hydroxyl or oxygen terminated surfaces. In essence, they behave as “conductive clays”. This article reviews progress—both ­experimental and theoretical—on their synthesis, structure, properties, intercalation, delamination, and potential applications. MXenes are expected to be good candidates for a host of applications. They have already shown promising performance in electrochemical energy storage systems. A detailed outlook for future research on MXenes is also presented.

25th Anniversary Article: MXenes: A New Family of Two‐Dimensional Materials

Since the discovery of mechanically exfoliated graphene in 2004, research on ultrathin two-dimensional (2D) nanomaterials has grown exponentially in the fields of condensed matter physics, material science, chemistry, and nanotechnology. Highlighting their compelling physical, chemical, electronic, and optical properties, as well as their various potential applications, in this Review, we summarize the state-of-art progress on the ultrathin 2D nanomaterials with a particular emphasis on their recent advances. First, we introduce the unique advances on ultrathin 2D nanomaterials, followed by the description of their composition and crystal structures. The assortments of their synthetic methods are then summarized, including insights on their advantages and limitations, alongside some recommendations on suitable characterization techniques. We also discuss in detail the utilization of these ultrathin 2D nanomaterials for wide ranges of potential applications among the electronics/optoelectronics, electrocat...

Recent Advances in Ultrathin Two-Dimensional Nanomaterials

The invention relates to the technical field of 3D printing materials, and particularly discloses an antibacterial nylon material for 3D printing, and a preparation method thereof, wherein the antibacterial nylon material comprises the following raw materials by weight: 80-120 parts of nylon, 5-15 parts of calcium carbonate, 5-10 parts of chopped glass fiber, 1-3 parts of a coupling agent, 1-3 parts of a lubricant, 0.5-2 parts of an antioxidant, and 0.5-2 parts of an antibacterial agent. According to the present invention, the antibacterial nylon material has excellent mechanical property andbroad-spectrum antibacterial effect, and especially has inhibition effects on super-drug-resistant bacteria Methicillin-resistant Staphylococcus aureus (MRSA).

Antibacterial nylon material for 3D printing, and preparation method thereof

The invention relates to the technical field of 3D printing, and specifically discloses a method for preparing a soft and hard movable compound bone rehabilitation protection tool through 3D printing.The method includes the following steps that modeling is conducted, wherein bone rehabilitation protection tool modeling is conducted through 3D modeling software or 3D scanning; slicing and printingare conducted, wherein slicing operation is conducted on a to-be-printed bone rehabilitation protection tool through the slicing technology; then, 3D printing is conducted on the bone rehabilitationprotection tool through a 3D printer; and the bone rehabilitation protection tool comprises a fixed part, a movable part and a connection part. Because an antibiosis nylon material is adopted for thefixed part of the bone rehabilitation protection tool, the fixed part of the bone rehabilitation protection tool can have an excellent antibiosis effect; and a polycaprolactone material capable of being softened is adopted for the movable part, and when not suitable for a patient, the movable part can be soaked in water of 60 DEG C to be softened and is then reshaped to match with the place for which the movable part is not suitable before.

Method for preparing soft and hard movable compound bone rehabilitation protection tool through 3D printing

The invention discloses a device and a method for detecting the evolution of the corrosion resistance of a coating along with the deformation of the magnesium base material. The detection device comprises a corrosion reaction tank, a sample loading device arranged in the corrosion reaction tank, a circulating and heating device and an electrochemical workstation used for detecting electrochemicalsignals in the bending strain process of a sample. The corrosion reaction tank is internally provided with a solution for simulating the physiological environment of the sample. The circulating heating device is connected with the corrosion reaction tank through a guide pipe, and is used for circularly supplying the solution for simulating the physiological environment at a proper temperature to the corrosion reaction tank. The sample loading device is connected with an electronic universal testing machine through a connecting rod. The detection device can simulate the outer bending plastic deformation of a medical magnesium alloy implant material body. The change of the corrosion resistance of the surface coating of the magnesium alloy is measured through an electrochemical device in theslow bending strain process. The detection method can dynamically measure the electrochemical information change of the surface coating in situ. Therefore, the development rule and the self-repairingcapability of the corrosion resistance of the surface coating can be analyzed.

Device and method for detecting evolution of corrosion resistance of coating along with deformation of magnesium base material

The invention discloses a preparation method and application of a medical magnesium-based metal coating with stress-corrosion-resisting and self-repairing functions. The method comprises the followingsteps: taking medical magnesium-based metal as a matrix; firstly, pre-treating to remove machining residues and surface attached matters; then putting into a sodium hydroxide solution and carrying out hydroxylation treatment; then coating the surface of the matrix with a corrosion inhibitor; and carrying out heat treatment and curing to form the coating with the stress-corrosion-resisting and self-repairing functions, wherein the corrosion inhibitor is prepared from three components including a silane coupling agent, phytic acid and graphene oxide. A preparation technology of the coating involved in the invention is simple in method and easy to operate; the obtained coating has good bonding strength and good biocompatibility and has a self-repairing capability in a physiological environment; the corrosion-resisting performance of a magnesium alloy can be improved and the stress corrosion sensitivity can be inhibited; and therefore, the prepared magnesium-based metal with the protection coating as a medical implantable device material can be applied in the clinical aspect.

Preparation method and application of medical magnesium-based metal coating with stress-corrosion-resisting and self-repairing functions

The invention relates to the technical field of 3D printing materials, and particularly discloses a low-temperature 3D printing material for a bone rehabilitation protective device and a preparation method thereof. The low-temperature 3D printing material for the bone rehabilitation protective device comprises 80-120 parts of polycaprolactone; 20-40 parts of polylactic acid; 10-20 parts of polyurethane; 3-5 parts of filler; 1-5 parts of crosslinking agent; 1-3 parts of antibacterial agent; 0.5-2 parts of lubricant. The material adopts polycaprolactone with the glass transition temperature of -60 DEG C and the melting point of 60 DEG C as a main raw material, thereby ensuring that the 3D printing material can be printed at lower temperature. In addition, the material is good in mechanical property and has good antibacterial property.

Xiaojian Wang

Papers

Antibacterial nylon material for 3D printing, and preparation method thereof

Method for preparing soft and hard movable compound bone rehabilitation protection tool through 3D printing

Device and method for detecting evolution of corrosion resistance of coating along with deformation of magnesium base material

Preparation method and application of medical magnesium-based metal coating with stress-corrosion-resisting and self-repairing functions

Low-temperature 3D printing material for bone rehabilitation protective device and preparation method thereof