LDHs/LLDPE复合薄膜的制备及保温性能研究  

Preparation and thermal insulation performance of LDHs/LLDPE composite films

作　　者：袁华金 成晓玲[1,3] 刘源 周恩国 赵文林 何洁冰 熊晓燕 Yuan Huajin;Cheng Xiaoling;Liu Yuan;Zhou Enguo;Zhao Wenlin;He Jiebing;Xiong Xiaoyan(School of Chemical Engineering and Light Industry,Guangdong University of Technology,Guangzhou 510006;GCH Technology Co.,Ltd.,Guangzhou 510445;Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory(Rongjiang Laboratory),Jieyang 515200;Center for Industrial Analysis and Testing,Guangdong Academy of Science,Guangzhou 510650)

机构地区：[1]广东工业大学轻工化工学院,广州510006 [2]呈和科技股份有限公司,广州510445 [3]化学与精细化工广东省实验室揭阳分中心(榕江实验室),揭阳515200 [4]广东省科学院工业分析检测中心,广州510650

出　　处：《化工新型材料》2024年第6期78-82,共5页New Chemical Materials

基　　金：广东工业大学横向项目(21HK0340)。

摘　　要：采用共沉淀法合成锌铝硝酸根型水滑石(ZnAl-NO_(3)-LDH),通过阴离子交换法将乙二胺四甲叉膦酸四钠(EDTMPS4Na)插层到ZnAl-NO_(3)-LDH中得到乙二胺四甲叉膦酸根插层水滑石(EDTMPS-LDH),使用硅烷偶联剂KH570对其进行表面改性得到类水滑石(LDHs)。将LDHs与线性低密度聚乙烯(LLDPE)共混,通过挤出吹塑得到LDHs/LLDPE复合薄膜。采用多通道温度测量仪进行保温实验,测试LDHs/LLDPE复合薄膜的保温性能。结果表明:EDTMPS4Na插入ZnAl-NO_(3)-LDH层间,拓宽了ZnAl-NO_(3)-LDH的红外吸收范围,从7~25μm波段无明显红外吸收扩展到9~11μm波段具有明显选择性红外吸收;与ZnAl-NO_(3)-LDH相比,EDTMPS-LDH提高了ZnAl-NO_(3)-LDH的稳定性,添加LDHs比未添加LDHs的LLDPE复合薄膜白天棚内温度下降4%~15%,夜晚温度提高4%~17%,改善了LLDPE薄膜的保温性能。Zinc-aluminium nitrate layered double hydrotalcite(ZnAl-NO_(3)-LDH)was prepared by coprecipitation method,and ethylenediamine tetramethylphosphonate four sodium(EDTMPS4Na)was intercalated into ZnAl-NO_(3)-LDH by anion exchange method to obtain ethylenediamine tetramethylphosphonate intercalated layered double hydrotalcite(EDTMPS-LDH).The surface modification of EDTMPS-LDH was carried out by silane coupling agent KH570 to obtain hydrotalcites(LDHs).LDHs were blended with linear low-density polyethylene(LLDPE),and LDHs/LLDPE composite films were obtained by extrusion blow moulding.Thermal insulation experiments were carried out using a multi-channel temperature measuring instrument to test the thermal insulation performance of the LDHs/LLDPE films.The experimental results showed that the insertion of EDTMPS4Na into the interlayer of ZnAl-NO_(3)-LDH broadened the infrared absorption range of ZnAl-NO_(3)-LDH,expanding it from no obvious infrared absorption at 7~25μm mave band to obvious selective infrared absorption at 9~11μm mave band.Compared with ZnAl-NO_(3)-LDH,the thermal stability of EDTMPS-LDH was improved.Moreover,the addition of LDHs improved the thermal insulation performance of LLDPE films by decreasing the temperature in the shed by 4% to 15% during the day and increasing the temperature by about 4%to 17%at night compared with LLDPE composite films without LDHs.

关 键 词：水滑石 乙二胺四甲叉膦酸四钠 改性 复合薄膜 保温性能 

分 类 号：O611.64[理学—无机化学]