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Catalytic Degradation of Thermosetting Polymers in Sulfones under Atmospheric Pressure: Approaches and Techniques
Unmet Need: The imperative need for chemical recycling of thermosets and thermoset composites
Management of thermosetting polymers and their composites is becoming a serious public concern. The demand for an eco-friendly and economically viable recycling technology that is suitable for industrial scale-up is crucial. Performing chemical recycling...
Published: 1/30/2024
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Inventor(s): Jinwen Zhang, Baoming Zhao, Wangcheng Liu, Yiding Cao
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Improved performance of epoxies
Unmet Need: Use of renewable and nontoxic feedstock for epoxiesCurrently over 90% of commercial epoxy resins are derived from the non-renewable petrochemical bisphenol A (BPA). However, BPA is considered as a suspicious endocrine disrupting chemical and may cause harm to human health. In the recent decade, a variety of biobased epoxies have been developed...
Published: 5/25/2023
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Inventor(s): Jinwen Zhang, Tuan Liu
Keywords(s): bioepoxy, hyperbranched polymer, vegetable oil-based epoxy
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Expanding Materials Available for 3D Printing with Dissolvable Resins
Unmet Need: 3D printing technology requires specific printing materials
3D printing is an ideal technology to rapidly construct objects with complex geometries. Over half of available materials for 3D printing are photo-curing polymers for printing techniques such as digital light processing (DLP), stereolithography (SLA), and liquid crystal displays...
Published: 5/25/2023
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Inventor(s): Jinwen Zhang, Baoming Zhao
Keywords(s): 3D printing, photo curable, sacrificial mold, thermoset
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Polyurethane Composition with Enhanced Thermocompression Characteristics
Unmet Need: Challenges recycling and reprocessing polyurethane foams due to their thermoset behaviors
Polyurethane foams are thermosets and accordingly, at their useful end of life, it may be challenging to reuse or recycle such polyurethane foams. The reprocessing of polyurethane is usually a slow process, especially for those prepared from petroleum-based...
Published: 5/25/2023
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Inventor(s): Jinwen Zhang, Wangcheng Liu
Keywords(s): foam, polyurethane, vitrimer
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A Facile, Mild, Fast, Catalyst Free Polylactic Acid (PLA) Degradation Method that Generates a Variety of Valuable Products
Unmet Need: Current Polylactic Acid Recycling Processes are not Optimal, Requiring High Pressures/Temperatures, Long Degradation Times and/or Catalysts
Currently, PLA degradation routes are divided into three categories: high temperature hydrolysis, low temperature hydrolysis and alcoholysis. Alcoholysis usually requires transesterification catalysts...
Published: 5/25/2023
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Inventor(s): Jinwen Zhang, Yu-Chung Chang, Lin Shao
Keywords(s): 3D printing, aminolysis, chemcial recycling, polylactic acid, recycling of composites
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Environmentally Friendly Method for Recycling Plastic Waste
Unmet Need: Easy recycling of difficult to discard plastics
Extensive use of plastics has led to waste disposal management difficulties and serious environmental problems such as intensive energy consumption, toxic gas emission, and occupying many landfills as synthetic plastics such as polyethylene terephthalate (PET) do not rust and are not easily...
Published: 5/25/2023
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Inventor(s): Jinwen Zhang
Keywords(s): Carbon Dioxide, chemical recycling, Human Impacts and environmental change, Waste plastics
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Post-consumer Cotton Waste Recycling for High-Quality Brand New Fibers
Unmet Need: Efficient use of textile waste
The worldwide fiber consumption for consumer textile products has been growing steadily in the past several decades due to population growth and living standard improvement. Given the fact that only about 15% of the post-consumer textiles are recycled, the number of textiles that contribute to the municipal...
Published: 6/7/2023
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Inventor(s): Hang Liu, Jinwen Zhang, Wangcheng Liu
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Biobased Epoxy Resins and Curing Agents using Rosin Acids as Building Blocks
Abstract WSU inventors have developed epoxy resin systems and carboxylic terminated polyesters using rosin acids as building blocks. This provides a method to make epoxy resin systems that do not contain Bisphenol A (BPA). Current powder coating polyester resins are built largely on tere-or isophthalic acid and trimellitic anhydride as rigid monomers...
Published: 4/28/2023
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Inventor(s): Jinwen Zhang, Ming Xian, Xiaoqing Liu
Keywords(s): Advanced Materials, Chemistry, Clean Tech
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Methods for chemical degradation of epoxies using organic salts as catalysts
Unmet Need: Environmental friendly and cost-effective degradation of epoxiesRecycling of thermosetting polymers is both economically and environmentally important due to the prevalence of polymers in landfills. Strong alkali or acid have been used for this purpose. Harsh chemicals would result in environmental pollution as well as it would turn the...
Published: 5/25/2023
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Inventor(s): Jinwen Zhang, Tuan Liu, Junna Xin
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Protein-based Superabsorbent Hydrogels
SummaryResearchers at WSU have produce a novel superabsorbent material prepared by a macromonomer approach which provides for a superabsorbent hydrogel. Additionally, due to the method of manufacturing the hydrogel is biodegradable. Superabsorbent hydrogels are water-absorbing polymers that can absorb 10-1000 times their weight...
Published: 10/27/2021
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Inventor(s): Jinwen Zhang, Wenjia Song
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