木质素基脱落酸缓释微胶囊的制备及其在纸基地膜中的应用  

Preparation of lignin-based abscisic acid sustained-release microcapsules and its application in paper-based mulch

作　　者：刘超[1,2] 张威健 李雨 王雨婷 盖晓倩 计磊 卞辉洋 肖惠宁 LIU Chao;ZHANG Weijian;LI Yu;WANG Yuting;GAI Xiaoqian;JI Lei;BIAN Huiyang;XIAO Huining(Jiangsu Key Laboratory of Green Pulp and Paper and Biomass Materials,International Innovation Center of Forest Chemistry and Materials,Nanjing Forestry University,Nanjing 210037,Jiangsu,China;Zhejiang Kaifeng New Materials Co.,Ltd.,Quzhou 324400,Zhejiang,China;Department of Chemical Engineering,University of New Brunswick,NB Fredericton E3B 5A3,Canada)

机构地区：[1]南京林业大学江苏省绿色制浆造纸与生物质材料重点实验室林产化学与材料国际创新高地,江苏南京210037 [2]浙江凯丰新材料股份有限公司,浙江衢州324400 [3]Department of Chemical Engineering,University of New Brunswick,NB Fredericton E3B 5A3

出　　处：《精细化工》2024年第12期2754-2765,共12页Fine Chemicals

基　　金：国家自然科学基金项目(22208161,22208163)。

摘　　要：对木质素磺酸钠(SL)进行胺基化改性得到了胺基化木质素磺酸钠(ASL),然后,采用十二烷基苯磺酸钠(SDBS)对ASL进行表面改性制备了ASL/SDBS微球。利用自组装技术将植物生长调节剂脱落酸(ABA)装载于ASL/SDBS微球中,制备了以ASL/SDBS为壁材、ABA为芯材的木质素基脱落酸(ABA@ASL)微胶囊。以ABA@ASL微胶囊和棕榈蜡乳液为涂布材料,通过涂布技术制备了功能性纸基地膜。采用纳米粒度及Zeta电位分析仪、SEM、TEM、FTIR考察了m(SDBS)/m(ASL)对制备的ASL/SDBS微球的Zeta电位、微观形貌、结构组成的影响。通过载药量、包封率测定和药物缓释、抗光解性能测试,探究了壁芯比(即ASL/SDBS与ABA的质量比,下同)对ABA@ASL微胶囊载药和缓释的影响;采用水蒸气透过率、水接触角测定和模拟土壤环境的温度、相对湿度变化以及降解实验,分析了棕榈蜡涂布量对功能性纸基地膜性能的影响。结果表明,当壁芯比为1∶1时,制备的ABA@ASL-2微胶囊载药量为32%,包封率为58%,72 h药物释放率仅为49.3%,72 h的紫外线照射下药物保留率可达75.1%。ABA@ASL微胶囊分散液和棕榈蜡乳液的涂布量为3 g/m^(2)制备的地膜-3性能最佳,其水接触角达到103°,干抗张能量吸收值达到50.98 J/m^(2),湿抗张能量吸收值为11.84 J/m^(2);相比于第0 d,经地膜-3覆盖7 d后的地下5 cm土壤相对湿度保留率超过50%,其地下5 cm土壤保温性能与聚乙烯地膜相当。经土壤埋藏降解实验,纸基地膜在90 d内基本完全降解,降解产物对环境无污染。Aminated sodium lignosulfonate (ASL) was prepared from amine methylation of sodium lignosulfonate (SL),and surface modified with sodium dodecyl benzene sulfonate to obtain ASL/SDBS microspheres,into which the plant growth regulator abscisic acid (ABA) was encapsulated for the preparation of ABA@ASL microcapsules with ASL as wall material and ABA as core material.The functional paper-based mulch was then synthesized using ABA@ASL microcapsules and carnauba emulsion as coating materials through coating technology.The influence of m(SDBS)/m(ASL) on the Zeta potential,microstructure,and composition of ASL/SDBS microspheres was analyzed by nano particle size and Zeta potential analyzer,SEM,TEM and FTIR.The effect of wall core ratio (mass ratio of ASL/SDBS microspheres to ABA,the same below) on drug loading and sustained release of ABA@ASL microcapsules was investigated through determination of drug loading and encapsulation rate,as well as tests for drug sustained release and anti-photolysis properties.The effect of carnauba wax coating amount on the properties of functional paper-based mulch were further evaluated via water vapor transmittance test,water contact angle test,temperature and relative humidity change of simulated soil environment and degradation experiment.The results demonstrated that when the wall core ratio was 1∶1,the drug loading capacity of ABA@ASL microcapsules reached 32%,with an encapsulation efficiency of 58%.The drug release rate was observed to be only 49.3% after a 72-hour period,while the drug retention rate reached to 75.1% upon exposure to ultraviolet irradiation for the same duration.The mulch-3 exhibited optimal performance by applying ABA@ASL microcapsules and carnauba wax emulsion at dosages of 3 g/m^(2),with a water contact angle of 103°,a dry tensile energy absorption value of 50.98 J/m^(2),and a wet tensile energy absorption value of 11.84 J/m^(2).The relative humidity retention rate of soil subsurface 5 cm was higher than 50% after being covered by mulch-3 for 7 d,and the therm

关 键 词：木质素 脱落酸 载药微胶囊 纸基地膜 药物缓释 功能材料 

分 类 号：TS79[轻工技术与工程—制浆造纸工程] TQ452[化学工程—农药化工]