β-羟基丁酸与β-羟基戊酸酯共聚物/有机化蒙脱土纳米复合材料热性能、结晶性能与生物降解性能的研究  

THERMAL CHARACTERISTICS, CRYSTALLIZATION BEHAVIOR AND BIODEGRADABILITY OF POLY(β-HYDROXYBUTYRATE-coβ-HYDROXYVALERATE)/ ORGANOPHILIC MONTMORILLONITE (PHBV/OMMT) NANOCOMPOSITES

作　　者：王淑芳[1] 宋存江[2] 陈广新[1] 郭天瑛[1] 杨超 刘静 张喜慧 张邦华[1] 

机构地区：[1]吸附分离功能高分子材料国家重点实验室,南开大学高分子化学研究所,天津3000712 [2]生物活性材料教育部重点实验室,南开大学生命科学学院微生物学系,天津300071

出　　处：《离子交换与吸附》2004年第4期299-307,共9页Ion Exchange and Adsorption

基　　金：国家自然科学基金 (20374032); ;天津市自然科学基金 (023617887)

摘　　要：采用溶液插层法制备了-羟基丁酸与-羟基戊酸酯共聚物 (PHBV)/有机化蒙脱土(OMMT) 的纳米复合材料。用示差热分析 (DSC),热重分析 (TG) 和偏光显微镜 (POM) 研究了材料的热性能和结晶行为。通过土壤悬浊降解培养法研究了材料的生物降解性。结果表明,材料的熔点和熔融焓随OMMT含量的增加而降低。OMMT在纳米复合材料中的均匀分散,使材料形成了小尺寸的结晶,并有效降低了PHBV的结晶度,提高了结晶速率。在土壤悬浊液中该材料的生物降解性随着OMMT含量的增加而降低。Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)/Organophilic montmorillonite (PHBV/OMMT) nanocomposites were prepared by solution intercalation method. The thermal properties and crystallization behaviors were studied by means of differential scanning calorimetry (DSC), thermogravimetry (TG) and polarizing optical microscopy (POM), respectively. The biodegradability of the PHBV/OMMT nanocomposites was studied by a degrading cultivation method in soil suspension. The results showed the melting points (Tm) and the enthalpy of fusion (ΔHm) for PHBV decreased with increasing the OMMT content in the nanocomposites. It was demonstrated that the small-sized PHBV crystallites were formed and the crystallinity of PHBV was reduced effectively by the well-dispersed OMMT in the nanocomposites. The ranges of the processing temperatures of the nanocomposites could be enlarged by intercalation OMMT with PHBV. The biodegradability of PHBV/OMMT nanocomposites in soil suspension decreased with increasing the OMMT content.

关 键 词：β-羟基丁酸 β-羟基戊酸酯 共聚物 有机化蒙脱土 纳米复合材料 热性能 结晶性能 生物降解性能 

分 类 号：TB383[一般工业技术—材料科学与工程] TB33