環氧樹脂／酚液化柳杉／稻殼粉製作發泡體之性質

PROPERTIES OF FOAMS MADE FROM EXPOXY RESIN/ PHENOL-LIQUEFIED CRYPTOMERIA JAPONICA/RICE HUSK POWDER

李文昭(Wen-Jau Lee) ； 康甄玲(Chen-Ling Kang) ； 吳政穎(Zheng-Ying Wu) ； 陳奕君(Yi-Chun Chen)

《中華林學季刊》 49卷3期 (2016/09) Pp. 279-289

摘要

本研究將柳杉(Cryptomeria japonica; Japanese cedar)木粉以酚為溶劑，H2SO4為催化劑進行液化處理，以莫耳比5/1之環氧氯丙烷與雙酚A反應合成環氧樹脂，將環氧樹脂與酚液化柳杉以重量比100/50混合調配摻合環氧樹脂，並以環氧樹脂及摻合環氧樹脂為基質，稻殼粉為填料，三乙基四胺為硬化劑，聚矽氧烷化合物為發泡劑製作環氧樹脂發泡體。由試驗結果得知，以環氧樹脂為基質之發泡體具備圓形泡孔。添加稻殼粉可形成較大尺寸泡孔，並使其發泡體性質由硬脆轉變成硬韌。以摻合環氧樹脂為基質之發泡體為不規則之泡孔，並具有骨架結構，其性質軟韌。添加稻殼粉可提高環氧樹脂發泡體在350~450℃之熱抵抗能力，但在500℃以上有較多的重量損失。

關鍵字

摻合樹脂 ； 柳杉 ； 環氧樹脂 ； 發泡體 ； 酚液化木材

並列摘要

In this study, Cryptomeria japonica wood powders were liquefi ed in phenol with H_2SO_4 as the catalyst. Epoxy resin was synthesized by reacting bisphenol A with epichlorohydrin. The blended epoxy resin was prepared by mixing epoxy resin with phenol-liquefied C. japonica wood at a weight ratio of 100/50. Epoxy resin foams were made with epoxy resin and blended epoxy resin as the matrixes and the rice husk powder, triethylenetetramine and polysiloxane were used as the filler, hardener and blowing agent, respectively. The results showed foams made with epoxy resin as matrixes had the pores with rounded shape. Adding rice husk powder led the pores with a larger dimensions and changed the properties of foams from hard-brittle to hard-toughness. Nevertheless, foams made with blended epoxy resin as matrixes had the pores with an irregular shapes and the skeleton structure, which had the behavior of soft-toughness. Rice husk could enhance the heat-resistance of epoxy resin foams at the temperatures between 350℃ and 450℃. However, it had larger weight loss at temperature over 500℃.

並列關鍵字

Blended resins ； Cryptomeria japonica ； Epoxy resins ； Foams ； Phenol-liquefied wood