CAJ | 학술논문

以聚L-乳酸( PLLA)和麦草( WS)为原料，以N-甲基吗啉-N-氧化物( NMMO)为溶剂，采用溶液共混法制备了PLLA/WS共混物。首先将麦草溶解在NMMO后，再添加聚L-乳酸并溶解，制备聚L-乳酸与麦草的共混溶液。共混溶液采用浇膜法制备PLLA/WS共混物，采用差示扫描量热法、X射线衍射法、傅里叶变换红外光谱、热重分析和扫描电镜等方法对所得的共混物进行表征。结果表明，聚L-乳酸与麦草可以形成均匀的共混溶液。共混物中PLLA与麦草组分之间具有较强的相互作用，相容性较好。当共混物中PLLA的质量分数为50%时，共混物可以形成结晶结构，且随着PLLA 含量的增加，其结晶更加完美，熔点与热稳定性提高。共混物薄膜断面结构较为致密，这说明PLLA与麦草相容性较好，混合均匀。通过调节聚L-乳酸和麦草的配比，可以制备不同性能的生物高分子材料。
이취L-유산( PLLA)화맥초( WS)위원료，이N-갑기마람-N-양화물( NMMO)위용제，채용용액공혼법제비료PLLA/WS공혼물。수선장맥초용해재NMMO후，재첨가취L-유산병용해，제비취L-유산여맥초적공혼용액。공혼용액채용요막법제비PLLA/WS공혼물，채용차시소묘량열법、X사선연사법、부리협변환홍외광보、열중분석화소묘전경등방법대소득적공혼물진행표정。결과표명，취L-유산여맥초가이형성균균적공혼용액。공혼물중PLLA여맥초조분지간구유교강적상호작용，상용성교호。당공혼물중PLLA적질량분수위50%시，공혼물가이형성결정결구，차수착PLLA 함량적증가，기결정경가완미，용점여열은정성제고。공혼물박막단면결구교위치밀，저설명PLLA여맥초상용성교호，혼합균균。통과조절취L-유산화맥초적배비，가이제비불동성능적생물고분자재료。
The blends of PLLA/WS were prepared using poly ( L-lactic acid ) ( PLLA ) and wheat straw ( WS ) in N-methyl morpholine-N-oxide( NMMO) solution. WS was firstly dissolved in NMMO, then PLLA was successively dissolved in the WS solutions to get homogeneous mixture solutions. The mixtures were cast to prepare PLLA/WS blends. Differential scanning calorimetry,X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetry, and scanning electron microscopy were employed for the characterization of the blends. The results showed that PLLA and WS could form a homogeneous mixture in NMMO. A strong interaction between PLLA and WS was observed. The crystal structures were formed as the PLLA content was under 50%. With the increase of PLLA contents,the thermostability and melting points of PLAA/WS were gradually increased. The blend films possessed smooth section and micropore due to the compatibility between PLLA and WS. The biodegradable polymeric materials with different properties could be prepared through modifying the ratios of PLLA to WS.