What is the future of AM going to look like? (Authentise Weekly News-In-Review – #106)

With AM, as with any other exponential technologies, it’s very hard to make a sound prediction on its future development, even in the next 5 years. However, there are clear indications that certain roadblocks will most likely be surpassed. Industrial settings will see reliable and large-scale AM technologies being pushed to the high standards required to being widely adopted. New materials with exciting properties will enable new, unthought of applications and provide sustainable new ways to drive AM production forward. All the while, new engines with record number of AM parts will keep being produced and new crucial precedents will be set for future developments to build upon.

HUST Researchers Iron Out Cracks Of 3D Printed Bulk Metallic Glass

SEM imaging of micro-cracks that form inside a BMG when 3D printed by SLM. Image via Materials & Design

A team of researchers led by Professor Ning Li at the Huazhong University of Science and Technology (HUST), China, have discovered a way to scale-up 3D printing of bulk metallic glass (BMG). With a unique atomic structure, BMG alloys are highly resistant to wear and corrosion while maintaining the melted malleability of glass. However, micro-cracks that occur during 3D printing present a severe disadvantage to BMG utility. At HUST, Professor Li, Jianji Zhang, Wei Xing, Di Ouyang and Lin Liu have developed composite iron and iron-nickle BMG alloys that suppress these deal-breaking micro-cracks, with findings that provide general guidelines for processing BMGs via selective laser melting (SLM).

Read more about the study here.

Empa Cellulose 3D Printing Advances Yield Guidelines For Composite Material Tuning

Illustrations of the direct ink writing 3D printing process (left) and in situ polarization rheology (right) used in the Empa study. Image via ACS Nano

A group at the Swiss Federal Laboratories for Materials Science and Technology, Empa, is investigating ways to 3D print cellulose. As the most abundant organic polymer in the world, the material is sustainable, and biocompatible, presenting great potential for medical research. Recent progress made at Empa demonstrates how to 3D print cellulose nanocrystals (CNCs) as a material reinforcement. Experimentation also shows how to tune the orientations of these CNC “building blocks” to achieve different properties in a finished object.

Read the full article here.

Sunconomy To Develop 3D Printed Concrete Homes in Texas


Sunconomy, a U.S. construction company, has received permits to build its first 3D printed geopolymer additively manufactured house in Lago Vista, Texas.

Larry Haines, the founder of Sunconomy, stated, “We will be able to build the structure for a single family house in a day with virtually no waste, and built super strong and providing very low utility costs. Now that’s Sustainable!”

Read more here.

 

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The opportunities of 3D printing organic compounds (Authentise Weekly News-In-Review – Week 46)

3D printing is still struggling to overcome issues regarding biodegradability and its ecological impact. We’ve been using materials for thousands of years that are of natural origin and can easily be disposed of. It’s been a challenge to translate that to the latest manufacturing tech around. Cellulose is having a comeback, as researchers are understanding how to create polymer structures from abundant and renewable raw materials. A new group of new biomaterials is being developed, some with transient properties, capable of degrading and dissolving on-demand. Nanocellulose has been invented in the 1970s as a food thickener and could be coming to a dish near you, made more palatable thanks to 3D printing. Advances in chemistry collide with the challenges of 3D printing to open the way for complex, smart and immensely useful organic materials.

MIT Develops Method To 3D Print Abundant Natural Polymer Cellulose

Diagram showing a) printing process b) process under a microscope c) extruded filament d) mini glasses e) mini rose. Image via Advanced Science News.

MIT scientists Dr. Sebastian Pattinson and Prof A.J. Hart have now published a possible method of 3D printing a derivative of cellulose as a substitute for environmentally problematic plastics, one which sidesteps previously encountered problems. […] As detailed in the research paper, after printing, the cellulose acetate parts can be converted to cellulose proper by de-acetylation using sodium hydroxide.

Read the full article here.

3D Printed Biomaterials Degrade on Demand

Biomaterials that can degrade on demand have been 3D printed by engineers at Brown University. The materials were fabricated by means of stereolithographic printing, which uses an ultraviolet laser controlled by a computer-aided design system to trace patterns across the surface of a photoactive polymer solution. The capacity of the materials to degrade is imparted by the development of reversible ionic bonds. Precursor solutions were prepared with sodium alginate, a compound derived from seaweed that is known to be capable of ionic crosslinking. Different combinations of ionic salts, including magnesium, barium and calcium, were then added to 3D print objects with varying stiffness levels, a factor which affected how quickly the structures dissolved.

Read more about the research here.

Can 3D Printed Nanocellulose Transform The Food Industry?

Cellulose is a natural ingredient, but would you necessarily want to eat it? Diagram of the nanocellulose extraction process via bio1151.nicerweb

The Yissum Research Development Company of the Hebrew University of Jerusalem is the latest institution to introduce a nanocellulose-based platform that promises “the 3D printing of personalized food” with the added ability “to cook, bake, fry and grill while printing at the three dimensional space.”

Read the full article here.

 

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We’ll be at Formnext 2017 between the 14th-17th of November! Come check us out at booth Booth # 3.1-A33.