摘要
为实现小麦秸秆高值化利用,降低聚3-羟基丁酸酯(PHB)生产成本,同时综合提高麦秸粉(WSF)/PHB复合材料的物理力学性能和热性能。通过有机蒙脱土(OMMT)熔融共混改性WSF/PHB复合材料,热压—冷压工艺制备复合材料,探究OMMT添加量对复合材料性能的影响。结果表明:复合材料经OMMT改性后,OMMT层间距增大,部分PHB分子链进入OMMT层间,制备得到了插层型复合材料,复合材料的界面相容性得到改善。当OMMT添加量为1%时,相比对照组,复合材料的弯曲强度、弯曲模量、拉伸强度、拉伸模量、冲击强度分别提高了13.49%、13.78%、9.52%、15.53%、12.59%,吸水率下降了2.15%,复合材料的结晶度相比对照组提高了12.73%。OMMT的加入降低了复合材料的起始分解温度,但提升了复合材料的热稳定性及高温耐烧蚀性能。
In order to achieve high value-added utilization of wheat straw,reduce production cost of poly(3-hydroxybutyrate)(PHB)and improve physical,the mechanical and thermal properties of wheat straw flour(WSF)/PHB composites,WSF and PHB were served as the main materials used to produce WSF/PHB composites modified by organo-montmorillonite(OMMT).Composites were produced by hot-pressing and cold-pressing technology.The effect of OMMT content on properties of OMMT/WSF/PHB composites was analyzed.Results were analyzed by interlayer spacing of OMMT,fracture surface,physical and mechanical properties,thermal properties of composites.Results indicated that WSF/PHB composites modified by OMMT was increased interlayer spacing and better interface compatibility.Parts of PHB molecular chains were intercalated into the OMMT interlayers,and the prepared composites were intercalation composites.When the OMMT content was 1%,flexural strength,flexural modulus,tensile strength,tensile modulus and impact strength could reach better values,compared to control group,these values were increased by 13.49%,13.78%,9.52%,15.53%,12.59%,respectively.Compared to control group,the water absorption value was decreased by 2.15%,and crystallinity of OMMT/WSF/PHB composites was improved by 12.73%.Owing to the adding OMMT,the initial decomposition temperature of OMMT/WSF/PHB composites was reduced,while the ablative resistance and thermal stability were enhanced.
作者
杨泽勋
宋伟
田兰馨
陈政豪
王翠翠
张双保
Yang Zexun;Song Wei;Tian Lanxin;Chen Zhenghao;Wang Cuicui;Zhang Shuangbao(Wood Material Science and Utilization of Ministry of Education,Beijing Forestry University,Beijing 100083,P.R.China)
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2018年第4期67-72,共6页
Journal of Northeast Forestry University
基金
北京市教育委员会共建项目专项(2016GJ-01)
国家自然科学基金项目(31670571)
北京市自然科学基金项目(6162019)
浙江省共建项目(CZXC201410)
关键词
有机蒙脱土
麦秸粉
聚3-羟基丁酸酯
复合材料
物理力学性能
热学性能
Organo-montmorillonite
Wheat straw flour
Poly(3-hydroxybutyrate)
Composite
Physical and mechanical properties
Thermal properties
