采用乳化-交联法制备了明胶壳聚糖/蒙脱土(MMT)复合材料,考察了MMT对复合材料吸/放湿性能的影响。通过吸湿性能、放湿性能、粒径、扫描电镜、透射电镜和红外光谱等手段表征了复合材料的性能与结构。结果表明:MMT被成功引入到复合材料中,且MMT引入后复合材料微球的表面变得不光滑,在明胶中引入MMT所得的复合材料微球表面出现层状结构。MMT的引入可以增加复合材料的吸湿性能,明胶中引入MMT后复合材料的吸湿率优于壳聚糖中引入MMT,当MMT/明胶为0.05/1时,复合材料吸湿率和放湿率较大、放湿时间短,具有较好的吸/放湿性能,说明其综合调湿性能最优。
Gelatin/chitosan/MMT composites were prepared by emulsion-crosslinking method.The effect of MMT on the adsorption/desorption of moisture of the composites was investigated.The properties and structures of the composites were studied by moisture adsorption/desorption,particle size,SEM and TEM.The results shown that the MMT was successfully introduced into the composite by FT-IR.SEM and TEM showed that the surface of the microspheres was not smooth after the introduction of MMT.The surface of the microspheres with MMT in gelatin showed a layered structure.The moisture adsorption can be improved by MMT.The moisture adsorption rate of the composite with MMT in gelatin was higher than that of the composite with MMT in chitosan.The composites exhibited high moisture adsorption and desorption rate,short desorption time when the mass ratio of MMT to gelatin was 0.05 to 1,indicating a good moisture adsorption/desorption and comprehensive moisture regulation performance.
[1] Qin Menghao,Hou Pumin,Wu Zhimin,et al.Precise humidity control materials for autonomous regulation of indoor moisture[J].Building and Environment,2020,169:106581.
[2] Bovin G G,Mahajan P V.Regulation of humidity in fresh produce packaging[J].Reference Module in Food Science,2017,doi.org/10.1016/B978-0-08-100596-5.21895-7.
[3] 郑旭,袁丽婷.复合调湿材料的研究现状及最新进展[J].化工进展,2020,doi.org/10.16085/j.issn.1000-6613.2019-1161.
[4] 王吉会,王志伟.复合调湿材料的研究现状及最新进展[J].材料导报,2007,21(6):55-58.
[5] Salama A,Hasanin M,Hesemann P.Synthesis and antimicrobial properties of new chitosan derivatives containing guanidinium groups[J].Carbohydrate Polymers,2020,241:116363.
[6] 曹嘉洌,罗曦芸,张文清,等.壳聚糖基调湿材料的制备及性能[J].化工新型材料,2009,37(3):94-96.
[7] 沈方红,罗曦芸,张文清,等.羧甲基壳聚糖基调湿材料的制备及性能[J].功能材料,2010,40(10):1742-1743,1746.
[8] 尚建丽,董莉.双壳微纳胶囊的制备及热湿性能的试验研究[J].建筑材料学报,2015,18(3):428-432.
[9] Luo Wuhui,Ouyang Jiping,Antwi Philip,et al.Microwave/ultrasound-assisted modification of montmorillonite by conventional and gemini alkyl quaternary ammonium salts for adsorption of chromate and phenol:structure function relationship[J].Science of the Total Environment,2019,65(5):45-48.
[10] Zhang Hongling,Ma Jianzhe,Wang Fengyun,et al.Mechanism of carboxymethyl chitosan hybrid montmorillonite and adsorption of Pb(II) and Congo red by CMC-MMT organic-inorganic hybrid composite[J].International Journal of Biological Macromolecules,2020,149:1161-1169.
[11] Yan Long,Xu Zhisheng,Wang Xinghua.Synergistic effects of organically modified montmorillonite on the flame-retardant and smoke suppression properties of transparent intumescent fire-retardant coatings[J].Progress in Organic Coatings,2018,122:107-118.
[12] 赵起.改性蒙脱土的制备及催化长链酸酯化性能的研究[D].无锡:江南大学,2015.
[13] 王欣.明胶-壳聚糖/蒙脱土载药微球的制备与性能研究[D].天津:天津大学,2008.
