원문정보
초록
영어
In recent years, cellulose films or nano-paper have attracted great attention due to their potential applications in optoelectronic materials. Both optical transparency and optical haze are key properties, but generally, transparent paper substrates show 90% transparency but low optical haze (<20%). Corn straw is a resourceful and renewable agricultural waste, and its comprehensive utilization deserves attention. Therefore, in this study, different parts of corn straw (corn straw skin (CSS) and corn straw core (CSC)) were pretreated with different concentrations of complex enzymes combined with high-pressure homogenization to prepare CNF, and CNF films were further obtained by vacuum filtration. The results showed that the transmittance of CNF film prepared by corn straw skin (CSS) and corn straw core (CSC) had little difference. After enzyme pretreatment, the transmittance of CNF film was improved. When the enzyme activity was 900U/g, the transmittance of CNF film could be up to about 88%. However, the haze degree of CNF film of corn straw core (CSC) was higher than that of corn straw skin (CSS). When the enzyme activity was 900U/g, the haze degree was 76%. In addition, when the enzyme activity was 900U/g, the corn straw core (CSC) has excellent mechanical properties that the tensile strength is up to 220 MPa. Above all, this work provides a promising preparation method for nanocellulose films with high transparency and high haze from agricultural waste.