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首页> 外文期刊>Journal of Polymers and the Environment >A High Solid Content Bioadhesive Derived from Soybean Meal and Egg White: Preparation and Properties
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A High Solid Content Bioadhesive Derived from Soybean Meal and Egg White: Preparation and Properties

机译：豆粕和蛋清衍生的高固含量生物胶粘剂：制备与性能

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摘要

Soy protein-based adhesives (SPAs) inherently possess low solid content and poor water resistance. Chemical crosslinking can effectively improve the water resistance, but will also contribute to the low solid content. In this study, egg white (EW) was introduced to soybean meal (SM) adhesive as a substitute for water, followed by crosslinking with triglycidylamine (TGA) to develop a high-performance bioadhesive with a high solid content. The solid content, rheology, water resistance, functional groups, crystallinity, thermal degradation behavior, and fracture surface micrographs of the resulting adhesives were investigated. Three-ply plywood was fabricated and its wet shear strength was tested. The results indicated that 57.1 % EW increased the solid content of SM adhesive up to 43.32 %, while maintaining an appropriate viscosity for application. The water resistance of SM adhesive was improved by 36.0 % as optimal EW addition amount of 57.1 % was introduced. The results were attributed to the following observations: (1) EW further increased the crosslinking density of cured adhesive by involving in the crosslinking reaction. (2) EW promoted the transformation from small molecule element to skeleton structure of the cured system. (3) The cured SM/EW possessed a dense and smooth crosslinking structure, successfully preventing the water intrusion. The optimal adhesive formulation provided the plywood with the highest wet shear strength of 1.14 MPa which was improved by 153.3 and 80.9 % compared with that bonded by the SM and SM/TGA adhesive. The improvement can be explained by: (1) high solid content of SM/EW adhesive reduced the water evaporation, effectively limiting the damage to the mechanical properties of plywood. (2) The cured SM/EW adhesive possessed higher water resistance. (3) The appropriate viscosity of adhesive formed more interlockering with wood. The results of wet shear strength also indicated that the performance of new SM/EW bioadhesive was superior to that of conventional urea-formaldehyde (UF) resin and PAE cross-linked SM adhesive, and was comparable to that of melamine modified UF resin. The high solid content of the SM/EW bioadhesive combined two typical vegetable and animal proteins and pushed the performance limit of low solid content SPAs.
机译：大豆蛋白基胶粘剂（SPA）本质上具有低固含量和差的耐水性。化学交联可以有效提高耐水性，但也会导致低固含量。在这项研究中，将蛋清（EW）引入到大豆粉（SM）粘合剂中以代替水，然后与三缩水甘油基胺（TGA）交联以开发具有高固含量的高性能生物粘合剂。研究了所得粘合剂的固含量，流变性，耐水性，官能团，结晶度，热降解行为和断裂表面显微照片。制造了三层胶合板，并测试了其湿剪切强度。结果表明，57.1％EW使SM胶粘剂的固含量提高至43.32％，同时保持了适用的粘度。通过引入57.1％的最佳EW添加量，SM粘合剂的耐水性提高了36.0％。结果归因于以下观察结果：（1）EW通过参与交联反应而进一步提高了固化粘合剂的交联密度。 （2）EW促进了固化体系从小分子元素向骨架结构的转变。 （3）固化的SM / EW具有致密，光滑的交联结构，成功防止了水的侵入。最佳的胶粘剂配方使胶合板具有1.14 MPa的最高湿剪切强度，与SM和SM / TGA胶粘剂相比，胶合板提高了153.3％和80.9％。改善可以解释为：（1）SM / EW粘合剂的高固含量减少了水的蒸发，有效地限制了胶合板机械性能的损害。 （2）固化的SM / EW粘合剂具有较高的耐水性。 （3）粘合剂的适当粘度形成与木材更多的互锁。湿剪切强度的结果还表明，新型SM / EW生物胶粘剂的性能优于常规脲醛（UF）树脂和PAE交联的SM胶粘剂，并且可与三聚氰胺改性的UF树脂相媲美。 SM / EW生物胶粘剂的高固含量结合了两种典型的植物和动物蛋白，并突破了低固含量SPA的性能极限。

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  • 来源
    《Journal of Polymers and the Environment》 |2017年第3期|948-959|共12页
  • 作者

    Luo Jianlin; Li Longyu; Luo Jing; Li Xiaona; Li Kun; Gao Qiang;

  • 作者单位

    Beijing Forestry Univ, MOE Engn Res Ctr Forestry Biomass Mat & Bioenergy, Beijing Key Lab Lignocellulos Chem, MOE Key Lab Wooden Mat Sci & Applicat, Beijing 100083, Peoples R China;

    St Marys Beijing Bayi Sch, Beijing, Peoples R China;

    Beijing Forestry Univ, MOE Engn Res Ctr Forestry Biomass Mat & Bioenergy, Beijing Key Lab Lignocellulos Chem, MOE Key Lab Wooden Mat Sci & Applicat, Beijing 100083, Peoples R China;

    Beijing Forestry Univ, MOE Engn Res Ctr Forestry Biomass Mat & Bioenergy, Beijing Key Lab Lignocellulos Chem, MOE Key Lab Wooden Mat Sci & Applicat, Beijing 100083, Peoples R China;

    Beijing Forestry Univ, MOE Engn Res Ctr Forestry Biomass Mat & Bioenergy, Beijing Key Lab Lignocellulos Chem, MOE Key Lab Wooden Mat Sci & Applicat, Beijing 100083, Peoples R China;

    Beijing Forestry Univ, MOE Engn Res Ctr Forestry Biomass Mat & Bioenergy, Beijing Key Lab Lignocellulos Chem, MOE Key Lab Wooden Mat Sci & Applicat, Beijing 100083, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Soybean meal-based bioadhesive; Egg white; Chemical crosslinking; Solid content; Water resistance;

    机译：豆粕型生物胶;蛋白;化学交联;固含量;耐水性;

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