Effects of Pressure from High‐Pressure Homogenization on the Performance of Soybean Flour Based‐Adhesive,Macromolecular Materials and Engineering

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Effects of Pressure from High‐Pressure Homogenization on the Performance of Soybean Flour Based‐Adhesive
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2020-12-09 , DOI: 10.1002/mame.202000458
Yi Zhang ₁ , Ruiqing Shi ₁ , Xianxu Zhan ₂ , Jieyu Zhang ₁ , Jianzhang Li ₁ , Jing Luo ₃ , Qiang Gao ₁ , Sheldon Q. Shi ₄

Affiliation

A green and sustainable soybean flour (SF) adhesive is considered as a potential alternative to toxic formaldehyde‐based resins. Nevertheless, poor bond stability and low bonding strength is caused by the uneven size distribution and low reactivity of SF. Herein, SF adhesives with excellent and stable performance are synthesized via the synergistic action of high‐pressure homogenization (HPH) treatment by incorporating a green crosslinker. Specifically, an even distribution of the SF particles is obtained after the HPH treatment, from which large soy protein molecules are broken to several small and even single protein molecules. In this way, the adhesion stability is improved. Additionally, more active groups buried in proteins are exposed after the HPH treatment due to the unfolding of the protein molecules. Therefore, a more reactive SF is obtained and thus forms a denser crosslinking structure of resultant the adhesive, providing an increase in bonding strength. Particularly, the effects of homogenizing pressure on the adhesive performance are investigated. The results show that a 215.6% increase of wet bonding strength (1.01 MPa) is obtained after the HPH treatment with a homogenizing pressure of 20 MPa, meeting the standards (GB/T 9846‐2015) for interior applications.

中文翻译：

高压均质化压力对大豆粉基胶粘剂性能的影响

绿色和可持续的大豆粉（SF）粘合剂被认为是有毒的甲醛基树脂的潜在替代品。然而，由于SF的不均匀的尺寸分布和低的反应性，导致差的结合稳定性和低的结合强度。此处，通过结合绿色交联剂，通过高压均质（HPH）处理的协同作用，合成了具有优异且稳定性能的SF粘合剂。具体地，在HPH处理之后，获得了SF颗粒的均匀分布，从该SF颗粒中，大的大豆蛋白分子被分解成几个小的甚至单个的蛋白分子。以这种方式，提高了粘合稳定性。另外，由于蛋白质分子的展开，在HPH处理后暴露于蛋白质中的更多活性基团被暴露。因此，获得更高反应性的SF，从而形成所得粘合剂的更致密的交联结构，从而提高了粘合强度。特别地，研究了均质压力对粘合性能的影响。结果表明，在均压20 MPa的HPH处理后，湿粘合强度（1.01 MPa）提高了215.6％，符合室内应用标准（GB / T 9846-2015）。

更新日期：2021-01-16

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