Conference Program

TUESDAY, MARCH 19, 2019

Break + Exhibits

10:00 AM – 10:30 AM

Lunch + Exhibits

12:30 PM – 2:00 PM

Reception + Exhibits

4:00 PM – 5:00 PM

P: (240) 497-1242
uveb@radtech.org

RadTech International North America
The Association for Ultraviolet and Electron Beam Technologies
6935 Wisconsin Ave, Suite 207
Chevy Chase, MD 20815

UV Curable Elastomer Development for High Performance Dynamic Applications

Kyle Baldwin, MacDermid

While many UV curable polymers exist for demanding applications requiring a balance of strength, curing capability and appropriate viscosity ranges, such polymers do not perform as well in situations requiring high elastic response. Print environments, for example, often require a very soft elastomer with rapid elastic response time, high resilience and tensile strength properties, all while being cured appropriately in thicknesses as high as ¼”. Combining these properties into the world of 3D printing is a complex challenge given the demands of viscosity and cure speed that exist today. This presentation will introduce some of the concepts and challenges we work with in developing polymers for dynamic printing environments, and how these polymers may ultimately be applied to the 3D Printing world in the future.

Photopolymerization of Thiol-yne Polymers for Use in Additive Manufacturing

Darryl Boyd, US Naval Research Lab

Abstract coming soon.

Characterizing 3D printing voxel-voxel interactions in real time

Callie Higgins, NIST

Layered fabrication techniques harnessed by additive manufacturing (AM) such as stereolithography introduce microscale anisotropic heterogeneities in chemical, thermal, and mechanical properties such that the performance of parts depends strongly and often unpredictably on printing conditions. Specifically, the interactions between voxels during printing govern the final part properties, but standard characterization techniques are unable to adequately capture this dynamic environment. Sample-coupled-resonance photorheology (SCRPR) is a new atomic force microscopy technique developed to study this dynamic environment that captures fast, voxel-scale rheological and mechanical property changes in three dimensional (3D) printing resin throughout polymerization. Here, we present the first demonstration of the ability to image the 3D mechanical and rheological properties formed between adjacent AM voxels in the native printing environment with unprecedented temporal and spatial resolution using SCRPR. Our findings indicate that the in situ mechanical properties vary significantly as a function of voxel separation distance and highlight the importance of optimized resin formulation for a given illumination intensity and desired final part.

Formulating for UV Cure in Additive Manufacturing

Jo Ann Arceneaux, allnex USA, Inc.
Additive manufacturing, or 3D printing, has evolved from use in prototyping to use in manufacturing finished parts. The performance properties for finished parts are very different from those for prototypes. Thermoplastic type properties are desired, with ABS (acrylonitrile-butadiene-styrene) and PP (polypropylene) type properties the most popular. Very flexible formulations are also advantageous. This paper will evaluate the properties of various oligomers and monomers. The properties of 3D printed formulations based on these materials will then be determined and compared to ABS and PP.

Use of UV LED as a supplement for higher yield and better quality during growth

Yan Ren-Butcher, Illumitex

This session will review published scientific reports of the effects of UVA and UVB radiations on plant growth and development, quality improvement and disease controls. The possibility of introducing UV spectra to increase THC and other cannabinoids, as well as is becoming widely talked about amongst cannabis growers. From our research collaborations with growers, we found that UVA light increased yield and reduced Powdery Mildew infection by 100%. Beyond cannabis, the effect of UV radiation has been studied on several other crops including red-leaf lettuce, tomatoes, basil, wheat, and rice. The observations have shown both positive and negative results regarding crop quality and yield. This presentation will also provide some suggestion on how to apply UV light to your plants.

Applications of UVC LED for treating water before and after lettuce processing

Jim Cosman, Aquisense

Coming soon.

Validating use of UVC LED for leafy green spoilage avoidance

Tatiana Koutchma, AAFC

Coming soon.

Why Romaine Lettuce is so susceptible to E. Coli contamination and UVC means to control it

Keith Warriner, University of Guelph

Coming soon.

Title Forthcoming

Venkatesh Botu, Corning

Coming soon.

Accelerating Material Development with Artificial Intelligence

Will Tashman, Uncountable

Uncountable is a machine learning company that helps R&D teams reduce the cost of development by increasing the speed of innovation. We build custom machine learning models that understand ingredient interactions within a formulation space, and how those interactions impact critical performance properties. These models are used to suggest new formulations for testing, enabling a substantial acceleration in the development process over traditional DOE methods. Uncountable's customers include large polymer, coating, foam, adhesive and rubber manufacturers, like Cooper Standard. Working with Uncountable, R&D teams have seen a 2-3x decrease in the number of experiments and time that it takes to develop new formulations that meet their end-customer's requirements. This presentation will detail how Uncountable's technology differs from traditional DOEs, and adapts to the difficulties that scientists face when trying to develop innovative new chemistries.

Alkyl Tin Keggin Clusters as EUV Photoresist Technology

Rebecca Stern, Lawrence Berkeley National Laboratory

Uncountable is a machine learning company that helps R&D teams reduce the cost of development by increasing the speed of innovation. We build custom machine learning models that understand ingredient interactions within a formulation space, and how those interactions impact critical performance properties. These models are used to suggest new formulations for testing, enabling a substantial acceleration in the development process over traditional DOE methods. Uncountable's customers include large polymer, coating, foam, adhesive and rubber manufacturers, like Cooper Standard. Working with Uncountable, R&D teams have seen a 2-3x decrease in the number of experiments and time that it takes to develop new formulations that meet their end-customer's requirements. This presentation will detail how Uncountable's technology differs from traditional DOEs, and adapts to the difficulties that scientists face when trying to develop innovative new chemistries.

Advancements in Formulating for Additive Manufacturing

Neil Cramer, Colorado Photopolymer Solutions

3D printing/additive manufacturing continues to be one of the fastest growing and exciting technologies in the UV curing market. UV Curable (SLA and DLP) printing is considered the high-end technology choice for additive manufacturing because of its high resolution, strength in the Z-axis, and the ability to customize resins among other positive features. This presentation will focus on development of novel formulations to achieve improved attributes required for the next generation of additive manufacturing materials. Through innovative formulation strategy advancements in printed materials properties such as strength and toughness are achieved. Different chemistries are also utilized to improved cure speed and dimensional stability as well as other unique properties.

Light-Enabled Materials for Regenerative Engineering

Ali Khademhosseini, UCLA

Stimuli-responsive biomaterials, particularly those activated with light have enabled emerging micro- and nanoscale technologies as powerful tools for controlling the interactions between cells and their surroundings for biological studies, tissue engineering, and cell-based screening. Among these biomaterials, photocrosslinkable hydrogels have increasingly been used in various tissue engineering applications since they provide cells with a hydrated 3D microenvironment that mimics the native extracellular matrix. In our lab, we have developed various (UV and visible) light-mediated approaches to merge microscale techniques with hydrogel biomaterials for directing stem cell differentiation and generating complex 3D tissues. In this talk, I will outline our work in controlling the cell-microenvironment interactions by using light-activated patterned hydrogels to direct the differentiation of stem cells. In addition, I will describe the fabrication and use of photocrosslinkable microscale hydrogels for tissue engineering by using `bottom-up' and `top-down' approaches. Top-down approaches for fabricating complex engineered tissues involve the use of miniaturization techniques to control cell-cell interactions or to recreate biomimetic microvascular networks within mesoscale hydrogels. Our group has also pioneered bottom-up approaches to generate tissues by the assembly of light-mediated shape-controlled cell-laden microgels (i.e. tissue building blocks), that resemble functional tissue units. In this approach, microgels were fabricated via photocrosslinking and seeded with different cell types and induced to self assemble and generate 3D tissue structures with controlled microarchitecture and cell-cell interactions.

Advanced Prototyping and Direct Manufacturing

Maximilian Zieringer, Formlabs

Over the past years, 3D printing has become increasingly popular for rapid prototyping. Stereolithography has demonstrated its full potential as a powerful tool to take away on designs quickly and generate looks-like, feels-like parts. More recently, based on advances in 3D printers and material properties, stereolithography demonstrated its capabilities in direct manufacturing of end use parts. In manufacturing, 3D printing unlocks new design opportunities that cannot be achieved with traditional manufacturing techniques, allows for shorter product cycles, and has the potential to decrease warehouse and shipping costs. Formlabs has developed a variety of valuable solutions to address the demand in directly manufacturing dental products, footwear, and consumer goods. This presentation will cover some of these examples as well as a general overview of current trends, future directions and challenges in material development for stereolithography.

Title Forthcoming

Ellen Lee, Ford Motor Company

Coming Soon.

Use of UVC equipment for Processing Yogurt

Neil Cikurel, RND Arastirma Gelistirme Tasarim

Coming Soon.

Use of UVC equipment for treatment of salmon for freshness

Askild L. Holck, Nofima

Coming Soon.

Opportunities for UVC equipment for Air Treatment in Food Processing Facilities

Jim Beavers HyGriene IEQ

Coming Soon.

Opportunities for UVC equipment in Cannabis Growing Facilities

Tim Leach, HyGriene IEQ

Coming soon.

The Third Age of Fashion

Julia Daviy, Designer

Coming Soon.

Advances in Impact Modification of Photocured (Meth)acrylic Systems

Manjuli Gupta, Sartomer

Photocurable (meth)acrylic resins are important materials in additive manufacturing and are the subject of significant research and material innovation to bring improvements to the physical properties of final printed parts. Historically (meth)acrylic systems create rigid parts with strong mechanical properties including high modulus and strength, however this tends to equate to brittle, non-impact resistant materials. Incorporation of toughening agents used in thermoplastic applications has been tried with acrylate systems, unfortunately with limited success. Recent developments in impact modification utilizing novel chemistry have resulted in cured materials demonstrating elevated mechanical properties. Additionally, these new materials feature increased dispersion quality, stability and mechanical properties against traditional impact modifiers in (meth)acrylic systems.

Accelerating Open Additive Production through Partnership

Stephanie Benight, Origin

Coming Soon.

Using Additive Manufacturing for Advanced and Agile Development

Charlie Wood, Fast Radius

Coming soon.

Evaluation of Approaches for Formulation of UV LED

Paul Snowwhite, 7D Innovators

LEDs for UV curing are currently available 4 wavelengths – 365, 385, 395 and 405 nm. With all of the LED’s being in the UVA range and monochromatic this creates challenges to the UV formulator to overcome surface cure and achieve desired physical properties. The presentation will review novel formulation and curing approaches to solve surface curing issues and explore interactions with the various wave lengths.

Photoinitiator Choices with 365 nm UV LED Cure Formulations

Jo Ann Arceneaux, allnex USA, Inc.

Coming soon.

When it comes to UV LED, most overlook the Big Ideas…

Jennifer Heathcote

In order to increase the rate of technology adoption and gain market share over competitors, companies mistakenly market anecdotal concepts as universal facts with the expectation that targeted users will simply accept what is promoted and blindly invest in the technology. Unfortunately, the unintended consequences of this approach are that a true understanding of the technology’s potential is inhibited by the noise of disconnected and otherwise meaningless, misleading, and confusing facts and the powerful Big Ideas that ultimately drive wide scale adoption fail to properly register within the industry. At their core, Big Ideas provide strategic frameworks that activate thought, foster challenges, push boundaries, and spearhead testing of inferences that ultimately help users validate Big Ideas for their own unique set of application conditions. This paper will identify Big Ideas for UV LED curing and provide insight into how these Big Ideas should be employed to drive faster and more successful application development, adoption, and market penetration over the coming years.