PERFORMANCE EVALUATION OF ADHESIVES ON ENGINEERED BAMBOO by

Transcription

1 PERFORMANCE EVALUATION OF ADHESIVES ON ENGINEERED BAMBOO by Marina A. Alipon Forest Products Research and Development Institute (FPRDI), College, Laguna, Philippines

2 SIGNIFICANCE EXECUTIVE ORDER NO. 879 May 10, 2010 government commitment develop the bamboo industry value chain approach for a market-driven products/business development.

3 SIGNIFICANCE E -BAMBOO binding together strips, slats, strands, particles with a suitable adhesives to form composite materials. used in variety of ways similar to solid wood products. can be designed to meet application specific requirements.

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7 Objectives of the Study Evaluate the performance of adhesives on the properties of bamboos Kawayan tinik Giant bamboo Adhesives PVAC UF

8 Preparation of Samples Scraped the green outer skin of bamboo culm Cut the culms every 3m Sliced into strips Planed

9 Preparation of Samples Sorted and matched Dried to 8-10% MC Glued Pressed Properties tested

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16 Adhesives PVAC commercially prepared Adhesive # 1 - PVA glue with 50%minimum solid content, water resistant properties meets the D3 Standard.

17 Adhesive #1 Emulsion Properties % Solids 50 Viscosity, 25 0 C Appearance/color 8,000-13,000cps white ph Specific Gravity Storage Excellent

18 Adhesive # 2 - wood working adhesive (D3) with low water resistance

19 Adhesive #2 Emulsion Properties % Solids Viscosity, 25 0 C Appearance 4,000-8,000cps white opaque ph 4-5 Specific Gravity Storage Excellent

20 Adhesive 3 Urea-formaldehyde resin designed for bonding interior grade hardwood plywood

21 Glue # 3 Specifications % Solids Viscosity 25 0 C cps SG at 25 0 C ph Solvent Water Free formaldehyde 0.8% max Storage life 1 month

22 Adhesives UF adhesive # 3 Components Parts by weight UF 200 Catalyst 10 Industrial wheat flour 40 Water 50

23 Properties Evaluation Measures the suitability of the materials for various end-uses. moisture content bending (MOR, MOE) hardness shear (bond strength) delamination

24 Delamination Soak on water 6 hrs. Oven-dry 18 hrs at C Delamination not more than 1/3 of the total length of the line

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26 Properties Testing ASTM D1037: 2012, D3499: 2005

27 Results Static Bending Modulus of Rupture (MOR) measures the magnitude of load required to cause failure of the material. Modulus of elasticity measures the ability of the material to regain its original shape after the load is removed

28 Table 1. Mean mechanical properties of E- bamboo with various adhesives. Species Adhesive Static Bending Kawayan. tinik Giant bamboo MOR (MPa) MOE (GPa) I II III I II III

29 Table 1. Mean mechanical properties of E-bamboo Species Adhesive Hardness RD Kawayan tinik Giant bamboo (kn) I II III I II III

30 Table 1. Mean mechanical properties of E-bamboo Species Adhesive Shear MC MPa (%) K. tinik I II III G. bam I II III

31 Table 1. Mean mechanical properties of E-bamboo Species Adhesive Shear RD TS Dry Wet 24 hrs (MPa) (MPa) (%) K. tinik UF PVAc G. bam UF PVAc

32 Table2. ANOVA on the effect of adhesives on properties of E-bamboo Source DF MOR MOE Kauyan tinik MS F-Value MS F-Value Model ** ** Error Corrected Total 8 R 2 88 CV (%)

33 Table2. ANOVA on the effect of adhesives on properties of E-bamboo SV Kawayan tinik D F Shear Hardness Relative Density MS F- Value MS F- Value MS F- Value Model ** ** ns Error Corrected Total 8 R 2 85 CV (%)

34 Table 2. ANOVA on the effect of adhesives on properties of E-bamboo Source DF MOR MOE Giant Bamboo MS F-Value MS F-Value Model ns ** Error Corrected Total 8 R2 60 CV (%)

35 Table 2. ANOVA on the effect of adhesives on properties of E-bamboo SV Giant Bamboo D F Shear Hardness Relative Density MS F- Value MS F- Value MS F- Value Model ns ** ns Error Corrected Total 8 R 2 60 CV (%)

36 Table 3. DMRT for properties of E-bamboo. Adhesive MOR MOE Shear Hardness Relative Density Kawayan tinik I 132.6a 15.1a 5.98a 5.95a 0.72a II 98.2b 13.5a 3.77b 5.05a 0.71a III 79.9b 10.2b 4.74c 3.95b 0.64a

37 Table 3. DMRT for properties of E-bamboo. Adhesive MOR MOE Shear Hardness Relative Density Giant Bamboo a 14.3a 4.49a 6.06a 0.65a II 94.4a 13.3a 5.12a 4.66b 0.62a III 78.7a 10.0b 4.55a 3.17c 0.65a

38 No delamination meets the Philippine National Standard PNS 196:2000.

39 Total cost for gluing 200 x 1000 mm E-bamboo board/floor tiles Year 2013 Adhesive 1 = 75 Adhesive II = 24 Adhesive III = 15.60

40 Conclusion Strength properties of E-bamboo glued with PVAc (Adhesive #1) are better than the other adhesives Adhesive #2 generally higher than Adhesive #3 Cost of adhesives UF (Adhesive #3) preferred

41 Recommendation Continuing search on glue modification to lower the cost Indigenous source of adhesives Durability of E-bamboo with various types of adhesives

42 ACKNOWLEDGEMENT Products Research Forest and Development Institute (FPRDI)/Department of Science and Technology (DOST), College, Laguna, Philippines Philippine National Research Council (NRCP)/DOST

43 THANK YOU!