Dissertation > Excellent graduate degree dissertation topics show

Study on the Preparing of KGM-PVA/CA Adhesive

Author: ZhangJia
Tutor: GuoKangQuan
School: Northwest University of Science and Technology
Course: Agricultural Products Processing and Storage
Keywords: CA KGM PVA Adhesives
CLC: TQ437
Type: Master's thesis
Year: 2010
Downloads: 11
Quote: 0
Read: Download Dissertation

Abstract


In order to solve the problem of free formal dehyde in the wood adhesives, a new,green and renewable wood adhesive had developed. The free formal dehyde would pollut the environment and endange human health.The new wood adhesive is composed of KGM, CA, PVA, glacial acetic acid and water. The adhesive bonding performances of the mixture were studied. Including the following four aspects:Part I:Preparation of chitosan adhesive acidification process. Part II:konjac glucomannan/chitosan blend adhesive preparation process. Part III:KGM-PVA/CA blend adhesive preparation process. Part IV:Exploring the KGM-PVA/CA adhesive reasonable parameters for the plate. The main conclusions of this paper are as follows:(1) By studying the chitosan acidic optimum conditions, has been modified. Adhesive system in 1% acetic acid, gel reaction time was 24h of aging condition, the adhesive bonding performance is the best.(2) By studying the KGM/CA blend adhesive preparation process, can be seen:the amount of chitosan, the amount of konjac glucomannan, konjac glucomannan and chitosan in the interaction of adhesive would affect bonding strength. The dry bonding strength is 3.21MPa, and wet-like bonding strength is 1.6MPa.(3) Joining PVA as a modifier in the KGM/CA blend adhesive prepared ternary blend adhesive. By orthogonal test:the dry bonding strength is not changed obviously:the wet bonding strength is significantly increased. The dry adhesive bonding strength of ternary blend is 3.5MPa, wet-like bonding strength is 2.35MPa.(4) Through the orthogonal plywood hot press molding, obtained the best hot pressing parameters:pressing temperature 130℃, hot pressure 4MPa, pressing time 15min, placed plastic aging time 24h. According to the test parameters were verified, the bonding strength of plywood reached the top. The dry bonding strength is 4.01MPa, wet-like bonding strength is 2.88 MPa.Conclusions of this study will accelerate the process and development of wood adhesives. Those conclusions will provide assistance and scientific evidence in establishing and improving the adhesive processing conditions. Three kinds of polymer blends with very good water resistance of modified adhesive properties, will have good development in agro-processing.

Related Dissertations

  1. Study on the Mechanical Properties of Pva-high Toughness Cementitious Composites,TU528
  2. Synthesis of Polysulfones and Modification for Epoxy Adhesives,TQ433.437
  3. Research on Spinning Performance of Collagen and PVA Composite Solution,TQ340.64
  4. Study on Prohexadione Calcium on Growth of Rice and Wheat,S511
  5. Research on the Efficiency of Circle-Flow Constructed Wetland Process for Swine Wastewater Treatment and Zeolite Regeneration,X713
  6. Design on the Individual Cow’s Identification and Position System Based on ZigBee,TN929.5
  7. The Research of Effect for KGM Film on Storage and Preservation of the "Zhonghua" Kiwi Fruit,TS255.3
  8. Study on the Property and Application of the Edible Membrane of Konjac Glucomannan/Chitosan Blends,TS255.36
  9. Research of Centralized Authentication Base on SAML and Implementation in Digital Campus,TP393.18
  10. The Research on Application of Agent Construction System in Water Diversion from Taihe Reservoir to Zhangdian District of Zibo City Project,F283
  11. Application of Plasma Technology in Pigment Dyeing,TQ630.1
  12. Design and Implementation of the digital signature of electronic medical records,TP393.08
  13. Design and Implementation of Shaoxing City e-government extranet security support platform,TP393.08
  14. Based on the design of the online bookstore of the Public Key Infrastructure PKI-BOOKSHOP,TP393.08
  15. Design and Implementation of Network Secure Infrastructure in National Audit System,TP393.08
  16. Research and Implementation of Anonymous Digital Certificate Based on PKI,TP393.08
  17. Reinforcement of e-government information security based on PKI platform,TP399-C2
  18. Effect of Saliva Contamination and De-contamination on the Dentin Micro-tensile Bond Strengths of One-step Self-etching Adhesives,R783.1
  19. Research and Construction of Online Security CA in Linux,TP393.08
  20. Cellular Automata and Its Application in Image Processing,TP391.41

CLC: > Industrial Technology > Chemical Industry > Adhesive Industry > All purpose adhesive
© 2012 www.DissertationTopic.Net  Mobile