摘要
为解决染料污染问题,研制用于染料去除的抗蛋白干扰的新型吸附剂.自制聚(4-乙烯基苄基氯-二乙烯基苯)微球(PVBC/DVB),将其碳化后得到PVBC/DVB碳球.以PVBC/DVB碳球为基质,采用连续两步原子转移自由基聚合(ATRP)方法,首先接枝4-乙烯基苯磺酸钠(Nass)和苯乙烯(St)混合单体,构建具有疏水作用和离子交换作用的吸附位点,以提高其对染料的吸附能力;然后再次引发聚合反应,嵌段接枝两性离子2-甲基丙烯酰氧乙基磷酰胆碱(MPC)单体,外部构建具有强亲水性的两性离子聚合物的排阻位点,以提高其对蛋白等生物大分子的抗干扰能力.考察所制备吸附剂对染料的吸附性能和对蛋白的排阻能力,结果表明,所制备的吸附剂PVBC/DVB@poly(St-co-Nass)@poly(MPC)对污水中常见的6种染料都表现出较高的吸附容量和较快的吸附速率,同时对牛血清白蛋白的排阻能力高达96.6%.该吸附剂具备优异的抗干扰能力,可用于污水中有机染料的去除,经7次循环吸附实验后,依然表现出优异的吸附性能.
Abstract
In order to address the issue of dye contamination,a new adsorbent with anti-protein interference was developed for dye removal.Poly(4-vinylbenzylchloro-co-divinylbenzene)(PVBC/DVB)microspheres were synthe-sized and carbonized to obtain PVBC/DVB carbon spheres as the substrate.Through a two-step atom transfer radical polymerization(ATRP)method,PVBC/DVB carbon spheres were firstly grafted with a mixture of 4-vinylbenzene sulfonate(Nass)and styrene(St),creating adsorption sites with hydrophobic effect and ion exchange force to improve dye adsorption capacity.Then a second ATRP reaction was conducted to graft zwitterionic 2-methylac-ryloxyethylphosphocholine(MPC)monomers onto the external surfaceof PVBC/DVB carbon spheres,forming highly hydrophilic zweitterionic polymers as exclusion sites to improve the anti-interference ability against bio-logical macromolecules such as proteins.The results showed that the adsorbent PVBC/DVB@poly(St-co-Nass)@poly(MPC)had high adsorption capacity and fast adsorption rate for six common dyes found in wastewater,while achieving a remarkable 96.6%interference rejection capacity against bovine serum albumin.The adsor-bent had excellent anti-interference properties and can be applied for the removal of organic dyes in wastewater.After 7 cycles of adsorption experiments,the adsorbent still showed superior adsorption performance.
基金项目
北方民族大学青年人才培育基金资助项目(2021KYQD30)
国家自然科学基金资助项目(22064013)
北方民族大学2023年大学生区级创新训练计划基金资助项目(S202311407036)
国家科技期刊平台
NSTL
万方数据