Lignocellulosic nanofibers(LCNFs),implying lignin-containing cellulose fibers,maintain the prop-erties of both lignin and cellulose,which are hydrophobic and hydrophilic,respectively.The pres-ence of hydrophobic ligni...Lignocellulosic nanofibers(LCNFs),implying lignin-containing cellulose fibers,maintain the prop-erties of both lignin and cellulose,which are hydrophobic and hydrophilic,respectively.The pres-ence of hydrophobic lignin in LCNFs is expected to be an economical and attractive option that can improve the thermal and mechanical properties of polymers.Thus,this study was conducted to produce lignin-rich LCNFs from sugar-rich waste obtained from rice husks after acidic pretreat-ment.The LCNFs were produced from the lignin-rich solid fractions obtained after pretreatment and enzymatic hydrolysis,which were then incorporated as an additive into a chitosan-based film.The variations in lignin content in the range of approximately 50.6%-66.8%in differently obtained LCNFs gave significantly different optical strengths and mechanical properties.These controllable processes may allow for customized film formation.Additionally,the glucose-rich liquid fractions obtained after pretreatment and enzymatic hydrolysis were used as a substrate for ethanol fermentation to achieve total utilization of rice husk biomass waste.In conclusion,the lignin-rich biomass fraction holds promise as a suitable material for chitosan-LCNF film and has the potential to increase the economic feasibility of the biomaterial industry.展开更多
The demand for sustainable functional materials with an eco-friendly preparation process is on the rise.Lignocellulosics has been attributed as the most sustainable bioresource on earth which can meet the stringentreq...The demand for sustainable functional materials with an eco-friendly preparation process is on the rise.Lignocellulosics has been attributed as the most sustainable bioresource on earth which can meet the stringentrequirements of functionalization. However, cellulose nanomaterials obtained from lignocellulosics which has reachedadvanced stages as a sustainable functional material is challenged by its preparation procedures. These procedures can notbest be described as sustainable and eco-friendly owning to lots of energy and chemicals spent in the pre-treatment andpurification processes. These processes are intended to aid fractionation into the major components in order to removelignin and hemicellulose for the production of cellulose nanomaterials. This work is thus centred on reviewing theprogress achieved in introducing a new cellulose nanomaterial containing lignin. The preparation processes, propertiesand applications of this new lignin-containing cellulose nanomaterial will be discussed in order to chart a sustainablepreparation route for cellulose nanomaterials.展开更多
基金supported by the Technology Development Program funded by the Ministry of SMEs and Startups(MSS,Korea)[S2978549]supported by the National Research Foundation of Korea(NRF)grant funded by Korea government(Ministry of Science and ICT,MSITNo.2020R1C1C1005251).
文摘Lignocellulosic nanofibers(LCNFs),implying lignin-containing cellulose fibers,maintain the prop-erties of both lignin and cellulose,which are hydrophobic and hydrophilic,respectively.The pres-ence of hydrophobic lignin in LCNFs is expected to be an economical and attractive option that can improve the thermal and mechanical properties of polymers.Thus,this study was conducted to produce lignin-rich LCNFs from sugar-rich waste obtained from rice husks after acidic pretreat-ment.The LCNFs were produced from the lignin-rich solid fractions obtained after pretreatment and enzymatic hydrolysis,which were then incorporated as an additive into a chitosan-based film.The variations in lignin content in the range of approximately 50.6%-66.8%in differently obtained LCNFs gave significantly different optical strengths and mechanical properties.These controllable processes may allow for customized film formation.Additionally,the glucose-rich liquid fractions obtained after pretreatment and enzymatic hydrolysis were used as a substrate for ethanol fermentation to achieve total utilization of rice husk biomass waste.In conclusion,the lignin-rich biomass fraction holds promise as a suitable material for chitosan-LCNF film and has the potential to increase the economic feasibility of the biomaterial industry.
基金National Natural Science Foundation of China(No.51733009)Chinese Academy of Science-President’s International Fellowship Initiative(CAS-PIFI)Postdoctoral Research in China(No.2017PS0019).
文摘The demand for sustainable functional materials with an eco-friendly preparation process is on the rise.Lignocellulosics has been attributed as the most sustainable bioresource on earth which can meet the stringentrequirements of functionalization. However, cellulose nanomaterials obtained from lignocellulosics which has reachedadvanced stages as a sustainable functional material is challenged by its preparation procedures. These procedures can notbest be described as sustainable and eco-friendly owning to lots of energy and chemicals spent in the pre-treatment andpurification processes. These processes are intended to aid fractionation into the major components in order to removelignin and hemicellulose for the production of cellulose nanomaterials. This work is thus centred on reviewing theprogress achieved in introducing a new cellulose nanomaterial containing lignin. The preparation processes, propertiesand applications of this new lignin-containing cellulose nanomaterial will be discussed in order to chart a sustainablepreparation route for cellulose nanomaterials.
