CAJ | 학술논문

采用流延法制备了不同二甘醇(DEG)含量的聚丁二酸丁二醇二甘醇共聚酯(PBS-co-DEG)与热塑性淀粉(TPS)共混的复合膜，通过核磁共振氢谱仪、傅里叶变换红外光谱仪、凝胶渗透色谱仪、热重分析仪、紫外–可见分光光度计、偏光显微镜等对共聚酯的结构及复合膜的性能进行了表征和测试，采用N435脂肪酶对复合膜进行了降解实验。结果表明，随DEG含量的增加PBS-co-DEG／TPS复合膜的亲水性、光透过率和断裂伸长率均有所增加，热稳定性变化不明显；与PBS／TPS复合膜相比，PBS-co-DEG／TPS复合膜的酶降解速率显著提高。
채용류연법제비료불동이감순(DEG)함량적취정이산정이순이감순공취지(PBS-co-DEG)여열소성정분(TPS)공혼적복합막，통과핵자공진경보의、부리협변환홍외광보의、응효삼투색보의、열중분석의、자외–가견분광광도계、편광현미경등대공취지적결구급복합막적성능진행료표정화측시，채용N435지방매대복합막진행료강해실험。결과표명，수DEG함량적증가PBS-co-DEG／TPS복합막적친수성、광투과솔화단렬신장솔균유소증가，열은정성변화불명현；여PBS／TPS복합막상비，PBS-co-DEG／TPS복합막적매강해속솔현저제고。
Film casting method was adopted to prepare PBS-co-DEG copolymer and thermoplastic starch(TPS) composite film based on different diethylene glycol(DEG) content. The structure of PBS-co-DEG was characterized by proton nuclear magnetic resonance spectroscopy,Fourier transform infrared spectroscopy;molecular weight was tested by gel permeation chromatography;transmittance,thermal and crystallinity properties of the composite film were analyzed by thermgravimetric analyzer,polarizing microscope and UV-visible spectrophotometer;and the degradation property of composite film was tested by lipase N435. The results show that with the increasing content of DEG,the hydrophilicity,light transmittance and tensile strength of PBS-co-DEG/TPS composite film are improved,and thermal stability doesn′t change significantly. Compared with TPS/PBS composite film, lipase N435 catalyzed degradation of TPS/PBS-co-DEG composite film is better.