聚乙烯吡咯烷酮/羟丙基甲基纤维素/纳米纤维素三元恶臭气体阻隔喷膜研发及阻隔性能研究  

DEVELOPMENT AND BARRIER PERFORMANCE OF A POLYVINYLPYRROLIDONE/HYDROXYPROPYL METHYLCELLULOSE/NANOCELLULOSE TERNARY ODOR GAS BARRIER SPRAY FILM

作　　者：付佳慧 郭婕 刘爱荣[1,2] 周涛 赵由才[1,2] FU Jiahui;GUO Jie;LIU Airong;ZHOU Tao;ZHAO Youcai(College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China;State Key Laboratory for Pollution Control and Resource Reuse,Shanghai 200092,China)

机构地区：[1]同济大学环境科学与工程学院,上海200092 [2]污染控制与资源化研究国家重点实验室,上海200092

出　　处：《环境工程》2024年第12期116-125,共10页Environmental Engineering

基　　金：国家重点研发计划项目(2018YFC1901402)。

摘　　要：垃圾填埋处理的过程会产生恶臭气体,特点是产生量大、持续时间长、影响范围广等,其中硫化氢(H_(2)S)和氨气(NH_(3))是生活垃圾填埋场散发的典型恶臭气体。为了处理恶臭气体,使用以聚乙烯吡咯烷酮(polyvinylpyrrolidone, PVP)、羟丙基甲基纤维素(hydroxypropyl methylcellulose, HPMC)、纤维素纳米纤维(cellulose nanofiber, CNF)、纤维素纳米晶(cellulose nanocrystal, CNC)为膜基材的聚合物共混物(polymer blend)制备除臭复合膜,PVP的羰基与HPMC的游离羟基之间存有较强分子间氢键,在整个组成范围内形成可混溶的共混物,相容性良好。该高分子混合溶液喷洒后成膜,利用模拟升流式反应器隔绝H_(2)S和NH_(3),单因素实验及响应面分析得到最佳复合膜液配比为4.20%PVP、1.20%HPMC、0.40%CNF、0.06%CNC;并添加增塑剂1.5%丙三醇、表面活性剂1.0%吐温80、防蝇除臭剂3.0%柠檬烯、香料0.5%茶树精油优化复合膜性能,该复合膜对H_(2)S和NH_(3)的截留率在30 min时均可保证在95%以上。Gases with bad odor are produced during the landfill treatment process,and with a large production,long lifetime,and broad impact range.Among them,hydrogen sulfide and ammonia are the typical pungent gases released by landfills for municipal solid waste.To deal with odorous gases,this article used a polymer blend based on polyvinylpyrrolidone(PVP),hydroxypropyl methylcellulose(HPMC),cellulose nanofiber(CNF),and cellulose nanocrystal(CNC)as the membrane substrates.There is a strong intermolecular hydrogen bond between the carbonyl group of polyvinylpyrrolidone and the free hydroxyl group of hydroxypropyl methylcellulose,forming a miscible blend throughout the entire composition range with good compatibility.The polymer mixed solution was sprayed into a film,and a simulated upflow reactor was used to isolate hydrogen sulfide and ammonia gas.Single-factor experiments were conducted,response surface analysis was designed,and the optimal composite membrane liquid ratio was obtained as follows:4.20%PVP,1.20%HPMC,0.40%CNF,and 0.06%CNC.A plasticizer of 1.5%glycerol,a surfactant of 1.0%Tween 80,a fly repellent and deodorant of 3.0%limonene,and a fragrance of 0.5%tea tree essential oil were added to optimize the comprehensive performance of the composite membrane.The retention rate of H_(2)S and NH_(3) in the composite membrane can be guaranteed to be 95%above in 30 minutes.

关 键 词：恶臭气体 除臭复合膜 正交实验 气体截留率 优化制备 

分 类 号：TQ3[化学工程]