检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:陈秋蓉 罗艳[1,2,3] CHEN Qiurong;LUO Yan(College of Chemistry and Chemical Engineering,Donghua University,Shanghai 201620,China;Key Laboratory of Science&Technology of Eco-Textile,Ministry of Education,Donghua University,Shanghai 201620,China;National Manufacturing Innovation Center of Advanced Dyeing and Finishing Technology,Donghua University,Shanghai 201620,China)
机构地区:[1]东华大学化学与化工学院,上海201620 [2]东华大学教育部生态纺织科学技术重点实验室,上海201620 [3]东华大学国家先进染整技术制造创新中心,上海201620
出 处:《印染助剂》2024年第8期33-37,共5页Textile Auxiliaries
摘 要:甲醛是最主要的室内VOC污染源之一,目前常用多孔材料加以吸附。然而,这些吸附材料的吸附能力和使用周期均有限。亚氯酸钠(NaClO_(2))在酸性条件下释放得到二氧化氯(ClO_(2)),可将甲醛氧化为二氧化碳。但NaClO_(2)在常规条件下易于吸湿和分解,极不稳定。采用乳化交联法将NaClO_(2)作为芯材,将具有高生物相容性的天然高分子材料海藻酸钠(SA)和羧甲基纤维素钠(CMC-Na)作为壁材,制备NaClO_(2)复合凝胶微球以提高其稳定性和缓释性能。借助SEM、DLS、FTIR、TGA等分析测试仪器对所得微球进行形貌、官能团及热性能表征,并通过降解实验评价NaClO_(2)复合凝胶微球去除气态甲醛的能力。结果表明,制备的NaClO_(2)复合凝胶微球呈现规整球形,平均粒径为662.5 nm,具备良好的热稳定性能;当pH为6.5,甲醛初始质量浓度为4 mg/m^(3)时,250 mgNaClO_(2)复合凝胶微球表现出持续降解甲醛的能力,在前5 min对甲醛的降解率已达60.00%,30 min时对甲醛的降解率可至90.45%。由此可见,NaClO_(2)复合凝胶微球有望用于空调滤网或者室内装饰纺织品,起到吸附甲醛、净化室内空气的功效。Formaldehyde is one of the most important indoor VOC pollution sources,and it is often adsorbed by porous materials.However,these adsorbent materials have limited adsorption capacity and service life.Sodium chlorite(NaClO_(2))releases chlorine dioxide(ClO_(2))under acidic conditions,which can oxidize formaldehyde to carbon dioxide.Meanwhile,NaClO_(2)is prone to moisture absorption and decomposition,it is extremely unstable under conventional conditions.NaClO_(2)composite gel microspheres were prepared by emulsion crosslinking method with NaClO_(2)as core material and high biocompatible natural polymer materials sodium alginate(SA)and sodium carboxymethyl cellulose(CMC-Na)as wall material to improve their stability and slow release performance.The morphology,functional groups and thermal properties of the obtained microspheres were characterized by SEM,DLS,FTIR and TGA,and the ability of NaClO_(2)composite gel microspheres to remove gaseous formaldehyde was evaluated by degradation experiments.The results showed that the prepared NaClO_(2)composite gel microspheres were structured and spherical,with an average particle size of 662.5 nm,and had good thermal stability.When the pH was 6.5 and the initial mass concentration of formaldehyde was 4 mg/m^(3),the 250 mg NaClO_(2)composite gel microspheres showed the ability of continuous degradation of formaldehyde,and the degradation rate of formaldehyde reached 60.00%in the first 5 min and 90.45%in 30 min.It could be seen that NaClO_(2)composite gel microspheres were expected to be used in air conditioning filters or interior decoration textiles to adsorb formaldehyde and purify indoor air.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.198