端邻位羟基超支化聚氨酯树脂的制备及硼吸附性能的研究
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摘要
为了改善现有硼吸附有机材料的缺点,提高吸附剂对硼的选择性,本文以季戊四醇为中心,用甘油封端HDI和季戊四醇相继扩链后的预聚体制备了端邻位羟基超支化聚氨酯的硼吸附材料。利用FT-IR和TGA-DSC对其结构和热力学性能进行了表征和测定,并研究了R值对产物物理性能的影响,同时利用单因素试验法探索了反应温度、时间对季戊四醇和HDI封端扩链反应的最佳工艺以及所制备树脂对硼的最佳吸附工艺。结果表明:当R值为1.02时制备得树脂物理性能较优,该产物的玻璃化转变温度为102℃、初始热分解温度为266℃;该树脂对硼的最佳吸附工艺为:温度20℃,搅拌时间2.5 h,硼酸溶液浓度为2 g/L和溶液pH为3。在最佳工艺条件下制备的R值为1.02的树脂对硼的吸附能力可达到13.5 mg/g。
In orde to improve the defect of existing boron(B)adsorption organic materials and improve the selectivity of B adsorbent, boron adsorption materials of o-hydroxyl hyperbranched polyurethane were prepared by prepolymerization of glycerol terminated HDI and pentaerythritol after chain expansion. The structure characteristic and thermodynamic performance were characterized and measured by FT-IR, TGA-DSC. The effect of R ratio on physical properties of product was studied, the best temperature and time of reaction were researched, and the optimal adsorption process was researched by single factor experiment. The result showed that when R value is 1.02, the physical properties of the prepared resin are better, its glass-transition temperature was 102 ℃, initial thermal decomposition temperature was 266 ℃. The optimal adsorption process of resin to boron:temperature was 20 ℃, stirring time was 2.5 h, boric acid solution concentration was 2 g/L and solution pH was 3. Under this process condition,the optimum adsorption capacity can be achieved 13.5 mg/g.
In orde to improve the defect of existing boron(B)adsorption organic materials and improve the selectivity of B adsorbent, boron adsorption materials of o-hydroxyl hyperbranched polyurethane were prepared by prepolymerization of glycerol terminated HDI and pentaerythritol after chain expansion. The structure characteristic and thermodynamic performance were characterized and measured by FT-IR, TGA-DSC. The effect of R ratio on physical properties of product was studied, the best temperature and time of reaction were researched, and the optimal adsorption process was researched by single factor experiment. The result showed that when R value is 1.02, the physical properties of the prepared resin are better, its glass-transition temperature was 102 ℃, initial thermal decomposition temperature was 266 ℃. The optimal adsorption process of resin to boron:temperature was 20 ℃, stirring time was 2.5 h, boric acid solution concentration was 2 g/L and solution pH was 3. Under this process condition,the optimum adsorption capacity can be achieved 13.5 mg/g.
引文
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[3] 刘兴亮,罗静,李小杰,等.新型双功能性超支化聚合物的制备及表征[J].功能高分子学报,2018,31(2):147-152.
[4] 郭吟竹,汪婷雯,陈飞燕,等.PHMG化学键合改性抗菌聚氨酯软质泡沫的制备及性能[J].功能高分子学报,2016,29(3):274-280.
[5] AMROLLACHI M,SADEGHI G,MOHAMAD M I .Evaluation of adhesion strength,flammability,and degradation of HBCD—containing polyurethane adhesives[J].Journal of Applied Polymer Science,2008,110(6): 3538-3543.
[6] GHANEIAN M,JAMSHIDI B,DEHVARI M,et al.Pomegranate seed powder as a new biosorbent of reactive red 198 dye from aqueous solutions:adsorption equilibrium and kinetic studies[J].Research on Chemical Intermediates,2015,41(5):3223–3234.
[7] SHAHBAZI S,MOZTARZADEH F,SADEGHI G,et al.In vitro study of a new biodegradable nanocomposite based on poly propylene fumarate as bone glue[J].Materials Science and Engineering C,2016,69(1):1201-1209.
[8] 王芳,刘立柱,张笑瑞,等.正丁酸封端的超支化聚酯改性环氧树脂的性能研究[J].功能材料,2017,48(3):03072-03077.
[9] 罗玉梅,叶仲斌,胡明浩,等.超支化聚氨酯多元醇的制备和表征[J].聚氨酯工业,2017,32(5):33-36.
[10] 彭斯敏,王小妹,杨翰,等.链段间氢键化程度及离子基团对阴离子型聚氨酯性能的影响[J].功能高分子学报,2015,28 (3):302-306.
[11] 刘闯,张宁,林永波.包埋活性炭聚氨酯软泡去除废水中苯酚的研究[J].环境保护科学,2010,36(2):38-42.
[12] MUFAZZAL S M,MUNIR A,HUSSAIN C M,et al.Kinetics,thermodynamics and sorption profile of Eu(Ⅲ) on 4-(2-pyridy-lazo) resorcinol(PAR) imbedded polyurethane foam[J].Solvent Extrion Exc,2003,21(6):881-898.
[13] JANG S H,MIN BYUNG G,JEONG Y G,et al.Removal of lead ions in aqueous solution by hydroxyapatite/polyurethane composite foams[J].Journal of Hazardous Materials,2007,52(3):1285-1292.
[14] 孙哲.含脂肪胺聚氧乙烯醚结构单元的PUS的制备及性能[D].西安:陕西科技大学,2016.
[15] 中华人民共和国水利部水质试验研究中心,松辽委水环境监测中心.硼的测定(姜黄素法):SL 90—1994[S].北京:中国水利水电出版社,1995.
[16] 张茜,任其龙,杨亦文,等.硼吸附材料及其性能[J].化学进展,2015,27(1):125-134.