摘要
以生物油为原料,生物油与尿素按质量比100∶20、100∶30、100∶50进行氨基甲酸酯化改性,制备氨基甲酸酯生物油UO-20、UO-30和UO-50,进一步合成了生物基酚醛树脂UOR-20、UOR-30和UOR-50;对改性生物油及其酚醛树脂进行了结构表征,并研究了酚醛树脂的固化和耐热性能。结果表明:氨基甲酸酯化改性在生物油中引入了酰氨基,有利于生物基酚醛树脂的合成反应;随着生物油氨基化程度的增加,生物基酚醛树脂的软化点和凝胶化温度均有所降低;生物基酚醛树脂固化过程中在178和205℃有两个吸热峰,同时具有良好的流变性和加工成型性;在氮气气氛下800℃时,生物基酚醛树脂的残炭率可达42%~46%,热分解温度为245~325℃,具有很好的耐热性,并且残炭率和热分解温度均随生物油氨基化程度的增加而提高。
The conversion of the bio-oil into carbamate was carried out in accordance with the mass ratio of bio-oil and urea 100 ∶20,100 ∶30 and 100 ∶50 and achieved the carbamate bio-oil UO-20,UO-30 and UO-50 that were then used to synthesize and the biomass phenolics UOR-20,UOR-30 and UOR-50. The carbamate bio-oil and its derived phenolic resins were characterized,and the cure and thermal properties of the carbamate bio-oil derived phenolic resins were investigated. The results showed that the introduction of amino groups in bio-oil during carbamatization was beneficial for the preparation of biomass phenolics. With the increase of bio-oil amination degree,the softening point and gelation temperature of biomass phenolics reduced; there were two endothermic peaks at 178 and 205 ℃ during the cure process of biomass phenolics. Meanwhile,the benign rheological property and machine shaping were equipped; the char-yield of biomass phenolics at 800 ℃ and nitrogen environment could reach to 42%-46%. The thermal decomposition temperature these biomass phenolics could reach to 245-325 ℃,indicating that these biomass phenolics have a benign heat resistance.
作者
张浩然
艾涛
张东辉
魏俊奇
ZHANG Haoran;AI Tao;ZHANG Donghui;WEI Junqi(School of Materials Science and Engineering,Chang′an University,Xi′an 710064,China;Shaanxi Provincial Communication Construction Group,Xi′an 710075,China)
出处
《林产化学与工业》
EI
CAS
CSCD
北大核心
2018年第3期109-114,共6页
Chemistry and Industry of Forest Products
基金
国家自然科学基金资助项目(51608041)
陕西省交通厅科技项目(13-27K)
