乙酸丁酸纤维素酯流变学特性及其在壁材上的应用
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摘要
对机械活化固相共反应剂法合成的乙酸丁酸纤维素酯进行流变学特性分析,并以其为壁材制备载药微囊。研究表明:机械活化乙酸丁酸纤维素酯溶液为非牛顿流体中的假塑性流体,随温度的升高粘度和动态模量变化都较为明显;纤维素酯溶液的动态模量(G’,G")随角频率的增加呈近似线性增加,并且损耗模量G"大于储能模量G’,表现为粘性特征;以机械活化乙酸丁酸纤维素酯为壁材材料制备阿维菌素微胶囊,所得微胶囊颗粒圆滑,形状均一。
Rheological properties of cellulose acetate butyrate ester made by mechanical activation method of solid phase reaction doses analysis and as the wall material preparation for micro capsule. Research shows that the cellulose acetate butyrate solution for the pseudoplastic fluid in the non-Newtonian fluid,although higher viscosity with temperature and dynamic modulus changes are evident,but did not change its nature. The dynamic modulus( G',G") of cellulose acetate solution with the increase of the angular frequency,the approximate linear increase,loss modulus is greater than the performance for the cohesive characteristics; Successful preparation of abamectin microspheres by cellulose acetate butyrate ester through mechanical activation method of solid phase reaction doses as wall material,microspheres particles sleek and flat shape.
Rheological properties of cellulose acetate butyrate ester made by mechanical activation method of solid phase reaction doses analysis and as the wall material preparation for micro capsule. Research shows that the cellulose acetate butyrate solution for the pseudoplastic fluid in the non-Newtonian fluid,although higher viscosity with temperature and dynamic modulus changes are evident,but did not change its nature. The dynamic modulus( G',G") of cellulose acetate solution with the increase of the angular frequency,the approximate linear increase,loss modulus is greater than the performance for the cohesive characteristics; Successful preparation of abamectin microspheres by cellulose acetate butyrate ester through mechanical activation method of solid phase reaction doses as wall material,microspheres particles sleek and flat shape.
引文
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[2]杨佳,侯占群,贺文浩,等.微胶囊壁材的分类及其性质比较[J].食品与发酵工业,2009,35(5):122-127.
[3]李淑慧,邵竞尧,张鹏中,等.相变储能微胶囊的制备及其复合材料的研究进展[J].应用化工,2015,44(5):937-940,950.
[4] John J,Nandagopalan P,Baek S W,et al. Rheology of solid-like ethanol fuel for hybrid rockets:Effect of type and concentration of gellants[J]. Fuel,2017,209:96-108.
[5] Hohberg M,Karger L,Henning F,et al. Rheological measurements and rheological shell model considering the compressible behavior of long fiber reinforced sheet molding compound(SMC)[J]. Composites Part A:Applied Science and Manufacturing,2017,95:110-117.
[6]王芬,谢岩黎,毕宁宁.壁材流变学特性对微胶囊物化性质影响的研究进展[J].食品科技,2013(1):138-140.
[7] Krasnou I,Tarasova E,Maertson T,et al. Thermoplastic cellulose stearate and cellulose laurate:melt rheology,processing and application potential[J]. International Polymer Processing,2015,30(2):210-216.
[8]邹军军.壁材对微胶囊物性及与载体混合行为的影响[D].郑州:河南工业大学,2015.
[9]谭云方,黄祖强,张燕娟,等.月桂酸纤维素酯的机械活化固相酯化合成[J].湖北农业科学,2013,52(4):906-909.
[10] Hu H Y,Li H X,Zhang Y J,et al. Green mechanical activation-assisted solid phase synthesis of cellulose esters using a co-reactant:Effect of chain length of fatty acids on reaction efficiency and structure properties of products[J]. RSC Advances,2015,5:20656-20662.
[11] Qin X Z,Zhou J R,Huang A M,et al. A green technology for the synthesis of cellulose succinate for efficient adsorption of Cd(Ⅱ)and Pb(Ⅱ)ions[J]. RSC Advances,2016,6:26817-26825.
[12]文胜,陈燕萌,王小淑,等.机械活化固相共反应剂法合成纤维素混合酯[J].化工新型材料,2017,45(2):196-198.
[13] Gan T,Zhang Y J,Su Y,et al. Esterification of bagasse cellulose with metal salts as efficient catalyst in mechanical activation-assisted solid phase reaction system[J].Cellulose,2017,24:5371-5387.
[14]梁亚琴,胡志勇.两性纤维素醚的合成及流变性能的研究[J].应用化工,2009,38(3):402-404.
[15]刘国琴,李琳,李冰,等.小麦湿面筋蛋白的流变学性质[J].华南理工大学学报:自然科学版,2006(3):86-89.
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