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功能化离子液体液化木粉及其酚醛复合材料

DOI: 10.11777/j.issn1000-3304.2015.14369, PP. 556-563

Keywords: 功能化离子液体,液化,木粉,酚醛复合材料,游离醛含量,拉伸强度,冲击强度

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Abstract:

合成了氯代1-(2-羟乙基)-3-甲基咪唑离子液体[HeMIM]Cl、溴代1-乙胺基-3-甲基咪唑离子液体[AeMIM]Br和氯代1-羧乙基-3-甲基咪唑离子液体[CeMIM]Cl3种功能化咪唑离子液体,并分别进行了红外与氢核磁结构表征.然后用3种离子液体液化木粉,液化3h后向体系直接加入苯酚、甲醛和氢氧化钠,制备酚醛复合材料,并采用FTIR、XRD、DSC和SEM对酚醛复合材料进行结构、性能与形貌测试,研究离子液体种类对木粉液化率及酚醛树脂性能的影响.结果表明,离子液体及其液化木粉产物制备的酚醛复合材料性能得到明显改善.[CeMIM]Cl液化效果最好,90℃液化率高达24.6%,当[CeMIM]Cl与木粉质量比为101时,制备的酚醛复合材料的游离醛释放量由原来的3.64%降低到0.92%.离子液体[AeMIM]Br能将酚醛复合材料的冲击强度由原来的0.93kJ/m2提高到6.96kJ/m2,而[AeMIM]Br及其液化的木粉产物制备的酚醛复合材料拉伸强度从原来的3.28MPa提高到9.70MPa.

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