<p class="title">An acid used in medicine and to flavour some drinks may help develop electronic components and certain adhesives which are more durable and better for the environment, scientists say.</p>.<p class="bodytext">The researchers at Purdue University in the US have discovered a method for using tannic acid to help create improved adhesives, coatings and manufacturing composites.</p>.<p class="bodytext">They are using the discovery for epoxy-based polymers -- which are considered among the most versatile and useful adhesive agents because of their excellent mechanical strength and strong sticking power.</p>.<p class="bodytext">"There are few high-temperature hardeners that are sustainable," said Jeffrey Youngblood, a professor at Purdue's College of Engineering.</p>.<p class="bodytext">"Our technology is designed to improve sustainability without sacrificing performance," Youngblood said.</p>.<p class="bodytext">Epoxy polymers are used in a wide range of applications including coatings, adhesives, structural composites, insulating materials and components of electronics.</p>.<p class="bodytext">A hardening agent is added to the polymer to ensure stability and stiffness in high-temperature environments.</p>.<p class="bodytext">"We are using tannic acid as the hardener. It is more sustainable than other options, has less environmental impact and is relatively inexpensive," Youngblood said.</p>.<p class="bodytext">Tannic acid is a well-known, naturally occurring polyphenolic compound used in antioxidants.</p>.<p class="bodytext">Youngblood said the team's tannic acid solution also has shown in testing to be stable and maintain needed stiffness when exposed to high temperatures.</p>.<p class="bodytext">"Sustainable materials typically have lower performance, which compromises the public perception and penetration into the market. Here, such a trade-off is not necessary," Youngblood said.</p>
<p class="title">An acid used in medicine and to flavour some drinks may help develop electronic components and certain adhesives which are more durable and better for the environment, scientists say.</p>.<p class="bodytext">The researchers at Purdue University in the US have discovered a method for using tannic acid to help create improved adhesives, coatings and manufacturing composites.</p>.<p class="bodytext">They are using the discovery for epoxy-based polymers -- which are considered among the most versatile and useful adhesive agents because of their excellent mechanical strength and strong sticking power.</p>.<p class="bodytext">"There are few high-temperature hardeners that are sustainable," said Jeffrey Youngblood, a professor at Purdue's College of Engineering.</p>.<p class="bodytext">"Our technology is designed to improve sustainability without sacrificing performance," Youngblood said.</p>.<p class="bodytext">Epoxy polymers are used in a wide range of applications including coatings, adhesives, structural composites, insulating materials and components of electronics.</p>.<p class="bodytext">A hardening agent is added to the polymer to ensure stability and stiffness in high-temperature environments.</p>.<p class="bodytext">"We are using tannic acid as the hardener. It is more sustainable than other options, has less environmental impact and is relatively inexpensive," Youngblood said.</p>.<p class="bodytext">Tannic acid is a well-known, naturally occurring polyphenolic compound used in antioxidants.</p>.<p class="bodytext">Youngblood said the team's tannic acid solution also has shown in testing to be stable and maintain needed stiffness when exposed to high temperatures.</p>.<p class="bodytext">"Sustainable materials typically have lower performance, which compromises the public perception and penetration into the market. Here, such a trade-off is not necessary," Youngblood said.</p>