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改性脲醛对钩叶藤类藤材弯曲性能的影响
张菲菲,李担,汪佑宏,刘杏娥,徐斌
0
(安徽农业大学林学与园林学院,合肥 230036;国际竹藤中心,北京 100102)
摘要:
为实现棕榈藤材增强保韧、劣藤优用制作家具的目的,以大钩叶藤、高地钩叶藤为研究对象,选择浸注试剂、浸注量、增韧剂量、加热时间4个因素分三水平进行L9(34)正交试验,对改性材弯曲性能进行测定,通过优序数法进行综合分析建立最佳改性工艺。结果表明,与大钩叶藤素材相比,分别浸注脲醛树脂、脲醛树脂和聚乙烯醇后,其抗弯强度分别增加34.1%和12.7%;而高地钩叶藤素材在浸注脲醛树脂后,其抗弯强度增加2.5%。聚乙烯醇添加后,大钩叶藤、高地钩叶藤脲醛树脂改性材柔量分别增加6.00%和1.93%。综合评价的大钩叶藤最佳改性处理工艺为以脲醛树脂(urea formaldehyde resin, UF)+聚乙烯醇(polyvinyl alcohol, PVA)为改性试剂,浸注量为30%,聚乙烯醇添加量为0.10%,在120℃下干燥1.5 h;综合评价的高地钩叶藤最佳改性处理工艺为以脲醛树脂为改性试剂,浸注量为50%,在120℃下干燥0.5 h。恰当的改性处理不仅能提高棕榈藤材的抗弯强度,也能提高改性材的柔韧性。
关键词:  大钩叶藤  高地钩叶藤  聚乙烯醇  脲醛树脂  弯曲性能
DOI:10.13610/j.cnki.1672-352x.20161205.030
基金项目:国家自然科学基金项目(31570553)、安徽省自然科学基金项目(1508085MC60)和“十二五”国家科技计划课题项目(2012BAD23B0104)共同资助。
Effect of the modified UF on the flexural properties of Plectocomia’s rattan
ZHANG Feifei,LI Dan,WANG Youhong,LIU Xinge,XU Bin
(School of Forestry & Landscape Architecture, Anhui Agricultural University, Hefei 230036;International Centre for Bamboo and Rattan, Beijing 100102)
Abstract:
In order to improve the mechanical properties without losing the toughness and to manufacture optimal furniture with rattan of inferior quality, an orthogonal experiment L9 (34) with four factors of impregnating reagent, impregnating amount, dosage of toughening agent and drying time at three levels was designed to determine the flexural properties of the modified rattan of P. assamica and P. himalayana. The optimum process was also established by calculating the experimental results with optimum sequential method. Compared with the raw rattan, the MORs of P. assamica modified with UP, UF & PVA increased by 34.1% and 12.7%, respectively, while the MOR of P. himalayana modified with UP only increased by 2.5%. Compared with P. assamica and P. himalayana modified with UP only, the rattan toughness modified with additional PVA increased by 6.00% and 1.93%, respectively. The optimum process of modifying P. assamica synthetically is a mixture of UF and PVA, 30% UF, 0.10% PVA, drying for 1.5 hours at 120℃. The optimum process of modifying P. himalayana synthetically is using UF with 50% impregnating amount, drying for 0.5 hours at 120℃. An appropriate modified process can not only improve the MOR of the rattan, but also increase the toughness of modified rattan.
Key words:  P. assamica  P. himalayana  PVA  UF  flexural properties

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