SusChEM: Design and Evaluation of Soybean Oil Based Adhesives for Aqueous Environments

SusChEM：用于水环境的豆油基粘合剂的设计和评估

• 批准号: 1508440
• 负责人: Abraham Joy
• 金额: $ 39万
• 依托单位: University of Akron
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-08-01 至 2019-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1508440&HistoricalAwards=false
• 关键词: SusChEM; Design; Evaluation; Soybean; Oil

Non-technical: Adhesives are extensively used in several applications and are almost always made from petroleum based starting materials, which is a depleting resource. Therefore replacing these resources with widely available and sustainable materials such as soybean oil for the synthesis of adhesives is a national need. In medicine, adhesives are a critical component, and in several instances such as in a cardiac surgery, medical adhesives are a necessity. However, the performance of human-made adhesives is often less than optimal when it is applied in surgical or wet environments. Nature provides spectacular examples of adhesives that work extraordinarily in wet and harsh conditions. Mussels are able to secrete protein based adhesives that enable them to stick to boats and docks underwater. The PIs have developed an adhesive that is made from readily available and sustainable soybean oil which demonstrates superior adhesion to surfaces in wet conditions. This award is aimed at providing a better understanding of the chemical processes that are responsible for strong adhesion of this soybean oil based adhesive in wet conditions. The PIs will systematically modify the chemical composition of these adhesives and examine the nature of the adhesion. Such studies will enable design of adhesives that perform in challenging environments and which are translationally viable. The award enables graduate students to gain expertise in techniques and methodologies that are at the cutting edge of their field. In addition, the award will provide research opportunities for undergraduate and high school students.Technical: Adhesives such as those secreted by mussels and sandcastle worms are impressive for their ability to function in harsh conditions such as sea water and high winds. Synthetic polymers fall far short in their ability to mimic this ability to perform in wet environments. This award is aimed at gaining a better understanding of the interactions at the interface that enable adhesion under wet environments. The PIs have designed a modular polyester platform that enables the incorporation of various functional groups into the designed polyester. The major monomer for the synthesis of the adhesive polyester is derived from soybean oil - a widely available and sustainable resource. The designed polyester will contain long-chain pendant groups derived from soybean oil, which will provide the hydrophobic character to enable exclusion of water. In addition, the adhesion to a substrate will be provided by catechol units. Cohesive strength will be provided by coumarin units that crosslink upon photoirradiation. It will also contain various functional groups such as hydroxyl and amine groups that will affect the adhesion. The contribution of these functional groups will be examined by techniques that probe the substrate interface. Sum-frequency spectroscopy, soft contact mechanics (JKR) and solid state NMR will provide insight into the processes that account for the improved adhesion of these polyesters in wet environments. Students trained through this award will gain expertise in polymer synthesis, polymer characterization using cutting edge surface characterization techniques, and the opportunity to work collaboratively on teams that bring complementary skills.

非技术性：粘合剂广泛用于多种应用，并且几乎总是由石油基原材料制成，而石油基原材料是一种消耗性资源。因此，用广泛可用且可持续的材料（例如用于合成粘合剂的大豆油）替代这些资源是国家的需要。在医学中，粘合剂是一个关键组成部分，在某些情况下，例如在心脏手术中，医用粘合剂是必需的。然而，当人造粘合剂应用于手术或潮湿环境时，其性能往往达不到最佳效果。大自然提供了在潮湿和恶劣条件下发挥出色作用的粘合剂的惊人例子。贻贝能够分泌蛋白质粘合剂，使它们能够粘附在水下的船只和码头上。 PI 开发了一种由现成且可持续的大豆油制成的粘合剂，在潮湿条件下对表面具有优异的粘合力。该奖项旨在让人们更好地了解这种大豆油基粘合剂在潮湿条件下具有强粘合力的化学过程。 PI 将系统地修改这些粘合剂的化学成分并检查粘合的性质。此类研究将使粘合剂的设计能够在充满挑战的环境中发挥作用并且具有转化可行性。该奖项使研究生能够获得其领域最前沿的技术和方法方面的专业知识。此外，该奖项还将为本科生和高中生提供研究机会。 技术：贻贝和沙堡蠕虫分泌的粘合剂因其在海水和强风等恶劣条件下发挥作用的能力而令人印象深刻。合成聚合物在模仿这种在潮湿环境中发挥作用的能力方面还远远不够。该奖项旨在更好地了解在潮湿环境下实现粘合的界面相互作用。 PI 设计了一个模块化聚酯平台，可以将各种官能团纳入设计的聚酯中。合成粘性聚酯的主要单体源自大豆油——一种广泛可用且可持续的资源。设计的聚酯将含有源自大豆油的长链侧基，这将提供疏水特性以排除水。此外，对基材的粘附力将由儿茶酚单元提供。内聚强度将由光照射时交联的香豆素单元提供。它还含有各种官能团，如羟基和胺基，会影响粘合力。这些官能团的贡献将通过探测基底界面的技术来检查。和频光谱、软接触力学 (JKR) 和固态 NMR 将深入了解这些聚酯在潮湿环境中提高粘合力的过程。通过该奖项接受培训的学生将获得聚合物合成、使用尖端表面表征技术进行聚合物表征的专业知识，以及在具有互补技能的团队中进行协作的机会。