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標題: 乙醯化處理竹粒片對竹材塑膠複合材強度及耐候性質之影響
Effects of Acetylated Bamboo Particle on Mechanical and Weathering Properties of Bamboo Particle-Plastic Composites
作者: 洪克昌
Hung, Ke-Chang
關鍵字: Bamboo particle-plastic composites
Mechanical properties
Interfacial interaction
出版社: 森林學系所
引用: 葉英晉(2000)好竹連山。大地地理出版事業股份有限公司。143頁。 葉誌峰(2006)農林廢料-塑膠複合材之製造及其性質之研究。國立中興大學森林學系碩士論文。52頁。 謝榮生(1997)台灣與中國大陸竹材生產與利用。竹材利用與林產科技。161–184頁。 蕭雅方(1996)塗裝木材人工加速與自然劣化相關性之探討。國立台灣大學森林學系研究所碩士論文。88頁。 ASTM D 3274. Evaluation degree of surface disfigurement of paint films by microbial (fungal or algal) growth or soil and dirt accumulation. Chang, S. T. and H. T. Chang (2001) Comparisons of the photostability of esterified wood. Polym. Degrad. Stabil. 71:261–266. Chen, H. C., T. Y. Chen and C. H. Hsu (2006) Effects of wood particle size and mixing ratios of HDPE on the properties of the composites. Holz Roh Werkst. 64:172–177. Clemons, C. M. (2002) Wood-plastic composites in the United States-the interfacing of two industries. Forest Prod. J. 52:10–18. Dicke, R. (2004) A straight way to regioselectively functionalized polysaccharide esters. Cellulose 11:255–263. Dunningham, E. A., D. V. Plackett and A. P. Singh (1992) Weathering of chemically modified wood. Natural weathering of acetylated Radiata pine: preliminary results. Holz Roh Werkst. 50:429–432. Evans, P. D., A. F. A. Wallis and N. L. Owen (2000) Weathering of chemically modified wood surfaces. Natural weathering of Scots pine acetylated to different weight gains. Wood Sci. Technol. 34:151–165. Evans, P. D., N. L. Owen, S. Schmid and R. D. Webster (2002) Weathering and photostability of benzoylated wood. Polym. Degrad. Stabil. 76:291–303. Feist, W. C., R. M. Rowell and W. D. Ellis (1991) Moisture sorption and accelerated werthering of acetylated and methacrylated aspen. Wood Fiber Sci. 23:128–136. Fengel, D. and G. Wegener (1989) Influence of temperature. In: D. Fengel and G. Wegener eds. Wood: Chemistry, Ultrastructure, Reaction. Walter de Gruyter, Berlin. pp 319–342. Gardea-Hernández, G., R. Ibarra-Gómez, S. G. Flores-Gallardo, C. A. Hernández-Escobar, P. Pérez-Romo and E. A. Zaragoza-Contreras (2008) Fast wood fiber esterification. I. Reaction with oxalic acid and cetyl alcohol. Carbohydrate Polym. 71:1–8. Huda, M. S., L. T. Drzal, A. K. Mohanty and M. Misra (2008) Effect of fiber surface-treatments on the properties of laminated biocomposites from poly(lactic acid) (PLA) and kenaf fibers. Compos. Sci. Technol. 68:424–432. Jabarin, S. A. and E. A. Lofgren (1994) Photooxidative effects of properties and structure of high-density polyethylene. J. Appl. Polym. Sci. 53:411–423. Jebrane, M. and G. Sèbe (2007) A novel simple route to wood acetylation by transesterification with vinyl acetate. Holzforschung 61:143–147. Li, J. Z., T. Furuno, S. Katoh and T. Uehara (2000) Chemical modification of wood by anhydrides without solvents or catalysts. J. Wood Sci. 46:215–221. Maldas, D. and B. V. Kokta (1990) Influence of phthalic anhydride as a coupling agent on the mechanical behavior of wood fiber-polystyrene composited. J. Appl. Polym. Sci. 41:185–194. Maldas, D., B. V. Kokta and C. Daneault (1989) Influence of coupling agents and treatments on the mechanical properties of cellulose fiber-polystyrene. J. Appl. Polym. Sci. 37:751–775. Matsuda, H. (1996) Chemical modification of solid wood. In: D. N. S. Hon ed. Chemical modification of lignocellulosic materials. New york, USA. pp 159–183. Ochi, S. (2006) Development of high strength biodegradable composites using Manila hemp fiber and starch-based biodegradable resin. Composites A 37:1879–1883. Papadopoulos, A. N. (2006) Decay resistance in ground stake test of acetylated OSB. Holz Roh Werkst. 64:245–246. Papadopoulos, A. N. and A. Gkaraveli (2003) Dimensional stabilisation and strength of particleboard by chemical modification with propionic anhydride. Holz Roh Werkst. 61:142–144. Papadopoulos, A. N. and C. A. S. Hill (2002) The biological effectiveness of wood modified with linear chain carboxylic acid anhydrides against Coniophora puteana. Holz Roh Werkst. 60:329–332. Papadopoulos, A. N. and E. Traboulay (2002) Dimensional stability of OSB made from acetylated fir strands. Holz Roh Werkst. 60:84–87. Pasquini, D., E. M. Teixeira, A. A. S. Curvelo, M. N. Belgacem and A. Dufresne (2008) Surface esterification of cellulose fibres: processing and characterisation of low-density polyethylene/cellulose fibres composites. Compos. Sci. Technol. 68:193–201. Plackett, D. V., E. A. Dunningham and A. P. Singh (1992) Weathering of chemically modified wood. Accelerated weathering of acetylated radiate pine. Holz Roh Werkst. 50:135–140. Raj, R. C., B. V. Kokta, F. Dembele and B. Sanschagrain (1989) Compounding of cellulose fibers with polypropylene: effect of fiber treatment on dispersion in the polymer matrix. J. Appl. Polym. Sci. 38:1987–1996. Ross, R. J. and R. F. Pellerin (1994) Nondestructive testing for assessing wood members in structures: a review. GTR-70. USDA Forest Serv., Forest Prod. Lab., Madison, Wis. pp 1–4. Rossi, L. (2005) WPCs: putting innovation on a faster track. In: proceedings, eighth international conference on wood fiber-plastic composites. Madison, WI. pp 23–25. Rowell, R. M. (1984) Penetration and reactivity of cell wall components. In. R. M. Rowell ed. The chemistry of solid wood. Washington, USA. pp 175–210. Rowell, R. M. and W. D. Ellis (1979) Chemical modification of wood: reaction of methyl isocyanate with southern yellow pine. Wood and fiber 12:52–58. Rowell, R. M., A. Tillman and R. M. Simonson (1986a) A simplified procedure for the acetylation of hardwood and softwood flakes for flakeboard production. J. Wood Chem. Technol. 6:427–448. Rowell, R. M., B. S. Dawson, Y. S. Hadi, D. D. Nicholas, T. Nilsson, D. V. Placket, R. Simonson and M. Westin (1997) Worldwide in-ground stake test of acetylated composite boards. International Research Group on Wood Preservation Whistler, Canada (Document No. IRG/WP 97-40088). Rowell, R. M., R. H. S. Wang and J. A. Hyatt (1986b) Flakeboards made from aspen and southern pine wood flakes reacted with gaseous ketene. J. Wood Chem. Technol. 6:449–471. Rowell, R. M., R. Simonson, S. Hess, D. V. Placket, D. Cronshaw and E. A. Dunningham (1994) Acetyl distribution in acetylated whole wood and reactivity of isolated wood cell-wall components to acetic anhydride. Wood Fiber Sci. 26:11–18. Rowell, R. M., Y. Imasura, S. Kawai and M. Norimoto (1989) Dimensional stability, decay resistance and mechanical properties of veneer-faced low-density particleboard made from acetylated wood. Wood Fiber Sci. 21:67–79. Saheb, D. N. and J. P. Jog (1999) Natural fiber polymer composites: a review. Adv. Polym. Technol. 18:351–363. Shogren, R. L. and A. Biswas (2006) Preparation of water-soluble and water-swellable starch acetates using microwave heating. Carbohydrate Polym. 64:16–21. Stark, N. M. (1999) Wood fiber derived from scrap pallets used in polypropylene composites. Forest Prod. J. 49:39–46. Stark, N. M. (2006) Effect of weathering cycle and manufacturing method on performance of wood flour and high-density polyethylene composites. J. Appl. Polym. Sci. 100:3131–3140. Stark, N. M. and L. M. Matuana (2007) Characterization of weathered wood-plastic composite surfaces using FTIR spectroscopy, contact angle, and XPS. Polym. Degrad. Stab. 92:1883–1890. Stark, N. M., L. M. Matuana and C. M. Clemons (2004) Effect of processing method on surface and weathering characteristics of wood-flour/HDPE composites. J. Appl. Polym. Sci. 93:1021–1030. Tronc, E., C. A. Hernández-Escobar, R. Ibarra-Gómez, A. Estrada-Monje, J. Navarrete-Bolaños and E. A. Zaragoza-Contreras (2007) Blue agave fiber esterification for the reinforcement of thermoplastic composites. Carbohydrate Polym. 67:245–255. Tserki, V., N. E. Zafeiropoulos, F. Simon and C. Panayiotou (2005) A study of the effect of acetylation and propionylation surface treatments on natural fibers. Composites A 36:1110–1118. Verhey, S. A., P. E. Laks and D. L. Richter (2001) The effect of composition on the decay resistance of model woodfiber-thermoplastic composites. Sixth International Conference on Woodfiber-Plastic Composites. pp 79–86. Wu, J. H., T. Y. Hsieh, H. Y. Lin, I. L. Shiau and S. T. Chang (2004) Properties of wood plasticization with octanoyl chloride in a solvent-free system. Wood Sci. Technol. 37:363–372. Youngquist, J. A., A. Krzysik and R. M. Rowell (1986) Dimensional stability of acetylated aspen flakeboard. Wood Fiber Sci. 18:90–98. Zou, P., H. Xiong and S. Tang (2008) Natural weathering of rape straw flour (RSF)/HDPE and nano-SiO2/RSF/HDPE composites. Carbohydrate Polym. 73:378–383.
摘要: 本研究利用醋酸酐/二甲基甲醯胺混合液對竹粒片進行乙醯化處理,並將乙醯化後之竹粒片與高密度聚乙烯製備成竹材塑膠複合材;同時,利用萬能強度試驗機、X-ray繞射、固態核磁共振、掃描式電子顯微鏡、色差計、超音波材料檢測及示差掃描熱分析(Differential scanning calorimetry, DSC)等儀器,探討乙醯化處理對竹材塑膠複合材機械性質、界面性質及耐候性質之影響。試驗結果顯示,以乙醯化竹粒片所製備之竹材塑膠複合材,其抗彎強度與對照組間無顯著差異,而抗彎彈性模數則隨乙醯化程度提高而降低。至於內聚強度及木螺釘保持力方面,當粒片乙醯化重量增加率為2%時,即能有效提升複合材之內聚強度及木螺釘保持力,其內聚強度由未處理的1.2 MPa提高至乙醯化處理後的2.4 MPa。顯示,透過竹粒片乙醯化處理,確實能有效提高竹粒片與塑膠相容性以及二者間之界面性質。 另一方面,竹材塑膠複合材經戶外耐候試驗可以發現乙醯化處理(WPG 17)除能有效提高竹材塑膠複合材之光安定性之外,亦可有效提高複合材之動彈性模數保留率及抗彎強度保留率。此外,經過120天戶外耐候試驗後,未處理複合材之高密度聚乙烯結晶度由53.8%提高至77.1%,而乙醯化處理之複合材則由68.2%提高至86.7%,顯示耐候初期聚乙烯高分子會斷裂成移動性較高之小分子,進而導致二次晶化(Secondary crystallization)現象。另外,由複合材表面觀察得知,以乙醯化處理竹粒片所製備之竹材塑膠複合材,具有較佳之抗黴性。綜合上述結果顯示,透過竹粒片乙醯化處理,可有效增進竹材塑膠複合材之耐候與防黴等性質。
In this study, bamboo particles were acetylated by treating with acetic anhydride/dimethylformamide (DMF), and then these acetylated particles were used as raw materials to make bamboo particle-plastic composites (BPPC). Effects of acetylation on mechanical, interfacial and weathering properties of BPPC were evaluated by universal testing machine, X-ray diffractometer (XRD), 13C CP/MAS nuclear magnetic resonance spectrometer (13C CP/MAS NMR), scanning electron microscope (SEM), color difference meter, ultrasonic material tester, and differential scanning calorimetry (DSC). These results showed that the modulus of rupture (MOR) of BPPC had no significant difference between untreated and acetylated ones, but the modulus of elasticity (MOE) of BPPC decreased with increasing the extents of acetylation. However, internal bond strength and wood screw-holding strength of BPPC were significantly increased after acetylation, even though the weight gain of acetylated bamboo particle was only 2%, the internal bond strength of untreated and acetylated BPPC were 1.2 MPa and 2.4 MPa, respectively. Accordingly, it indicates that the compatibility and interfacial interaction between the bamboo particle and the polymeric matrix can be enhanced through acetylation process. On the other hand, the results of outdoor weathering test showed that, not only the photostability of BPPC could be improved through acetylation process, but also the retained dMOE ratio and MOR ratio of BPPC were significantly increased. Furthermore, the HDPE crystallinity of untreated BPPC was increased from 53.8% to 77.1%, while the acetylated BPPC was increased from 68.2% to 86.7% after 120-day outdoor weathering exposure. This result indicates that the chain scission of polyethylene was occurred within 120-day weathering exposure, and the resulting shorter chains were more mobile, thereby allowed them for secondary crystallization. In addition, the mildew resistance of acetylated BPPC was higher than that of untreated BPPC. Accordingly, these results conclude that the weatherability and antimildew property of BPPC also can be enhanced through acetylation process.
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