Drexel University

Admtech, LLC

Gongyao Zhou

Christopher Geisler

Yury Gogotsi

Peter I Lelkes

Vadym Mochalin

Donggang Yao

Haifeng Ji

Steven K Leist

Dajing Gao

Zongyan He

Daniel E Hagaman

Haibo Gong

A system and method for three-dimensionally printing high viscosity materials using electrohydrodynamics is provided. The system uses a relatively low voltage electric field to draw high viscosity polymers (not in solution) from a nozzle to form three-dimensional objects with lines less than 10 microns in width. Pressurized gas at the nozzle outlet can be used to print large size/dimension parts, instead of or in addition to the electric field to draw the polymers from the nozzle.

High resolution electrohydrodynamic three-dimensional printing of high viscosity materials

An absorbable high-strength zinc alloy implant material includes a first tier material selected from the group consisting of Zn, Fe, and Mg, wherein Zn is in a range between about 90% and about 99% by weight and Fe and Mg is in a combined range between about 1% and about 10% by weight. The implant material can also include a second tier material being one or more element selected from the group consisting of Ag, Cu, Ce, Li, Sr, Mn, and rare earth elements, wherein the second tier material is between about 0.001% and about 10% by weight.

Absorbable high-strength zinc alloy for medical implants

The present invention provides a 4D printed component that uses the photoisomerization stimulus as a method of activation. Other 4D printing methods use heat, moisture, a combination of heat and stress, and the heat from a light source as methods of activation. The present invention takes advantage of 3D printing capability and adds the capability of providing a printable material that dynamically changes shape over time when exposed to an external stimulus. The invention reduces the number of required 3D printed parts to create a moving object. This characteristic reduces the amount of onboard weight of the 3D printed components by reducing the number of parts required to create motion. The present invention removes the need for onboard sensors, processors, motors, power storage, etc. This characteristic will allow for manufacturing of, inter alia, novel medical devices, automated actuators, packaging, smart textiles, etc.

Externally activated shape changing device

In described embodiments, the present invention includes a magnesium-based composite material formed from a plurality of &#x3b1;-phase magnesium grains; and a &#x3b2;-alloy phase comprising magnesium and nano-diamond and/or and phosphate containing nanoparticles, the &#x3b2;-alloy phase surrounding each of the plurality of magnesium grains. A method of manufacturing a composite material is also disclosed.

Thixotropic processing of magnesium composites with a nanoparticles-haloed grain structure for biomedical implant applications

A hydrogel material for use in three-dimensional scaffold printing is disclosed. The material is formed from a first triblock polymer having a formula ABA and a second triblock polymer having a formula AmaBAma, wherein A is a first polymer, B is a second polymer, and Ama is a methacrylate of the first polymer. The material is thermosensitive and photocrosslinkable. A method of manufacturing the material is also disclosed.

Thermosensitive and crosslinkable polymer composite for three-dimensional soft tissue scaffold printing

The present invention includes a composition for implantation in a patient, comprising surface-functionalized nanodiamonds and at least one biodegradable biocompatible polymer. The present invention also includes a surgical fixation device for use in a patient.

Functionalized nanodiamond reinforced biopolymers

A rapid tooling method is provided for molding metal particles, ceramic particles or mixtures thereof directly from patterns comprising a meltable, soluble or decomposable substance and preferably formed by rapid prototyping technology, as well as particle compositions therefor. The method comprises mixing at least about 95% by weight sinterable metal particles, sinterable ceramic particles or mixtures thereof with at least about 0.5 wt. % to about 5.0 wt. % binder to form a powder mixture; casting the mixture around a pattern; applying pressure sufficient to compact the mixture to form a preform; removing the pattern; and heating the preform at a sintering temperature sufficient to sinter the particles and form a molded article. The pattern may be removed by either melting, dissolving or decomposing, and the sintering process preferably includes two stages which are performed simultaneously with the infiltration of metal, whereby which both shrinkage and distortion of molded article can be reduced or eliminated.

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Wilmington, DE, United States of America

Gongyao Zhou