Chemically modified lignin refers to a class of high-value products derived from the treatment of industrial lignin using physical,chemical,or biological methods,which alter its structure and properties.The modificati...Chemically modified lignin refers to a class of high-value products derived from the treatment of industrial lignin using physical,chemical,or biological methods,which alter its structure and properties.The modification of lignin will enhance its thermostability,antioxidant property,adsorbability,antibacterial property,degradability and plasticity,and opens new avenues for its use in biomass utilization,consequently expanding its potential applications.This paper reviews the theoretical foundations and preparation methods of modified lignin,such as amination modification,sulfonation modification,demethylation modification,oxidation modification,graft copolymerization modification and alkylation modification,were reviewed in this paper,with a particular focus on its applications in adhesives,dispersants,drug delivery systems,luminophores,carbon-based energy storage electrodes,and some other areas.Additionally,the paper addresses the challenges and issues faced by modified lignin.This review offers valuable theoretical insights for the green production of modified lignin and its expanded applications.展开更多
Chemical synthetic residual is one of the solid wastes generated from pharmaceutical industry.The pyrolysis and combustion characteristics of chemical synthesis residual were investigated using a thermogravimetric ana...Chemical synthetic residual is one of the solid wastes generated from pharmaceutical industry.The pyrolysis and combustion characteristics of chemical synthesis residual were investigated using a thermogravimetric analyser coupled with Fourier transform infrared spectroscopy(TG-FTIR)in this study.The processes of pyrolysis and combustion can be divided into three stages.The average weight loss rate of pyrolysis process at low temperature was higher than that of combustion.The kinetic parameters of chemical synthesis residual during pyrolysis and combustion were calculated based on the TG results.Acetic acid and 4-aminophenol were the main evolved matter observed in the pyrolysis process.The emission characteristics of combustion at low temperature were similar to that of the pyrolysis,while CO2 was found as the major gaseous product at high temperature.A high temperature about 850°C is needed to make sure the complete combustion of chemical synthesis residual.展开更多
基金supported by the National Natural Science Foundation of China(No.22108135)Natural Science Foundation of Shandong Province(No.ZR2024MB126,ZR2020QB197)+1 种基金Shandong University youth innovation team(No.2023KJ137)key Laboratory of Pulp and Paper Science,Technology of Ministry of Education of Qilu University of Technology(Shandong Academy of Sciences)(KF202310).
文摘Chemically modified lignin refers to a class of high-value products derived from the treatment of industrial lignin using physical,chemical,or biological methods,which alter its structure and properties.The modification of lignin will enhance its thermostability,antioxidant property,adsorbability,antibacterial property,degradability and plasticity,and opens new avenues for its use in biomass utilization,consequently expanding its potential applications.This paper reviews the theoretical foundations and preparation methods of modified lignin,such as amination modification,sulfonation modification,demethylation modification,oxidation modification,graft copolymerization modification and alkylation modification,were reviewed in this paper,with a particular focus on its applications in adhesives,dispersants,drug delivery systems,luminophores,carbon-based energy storage electrodes,and some other areas.Additionally,the paper addresses the challenges and issues faced by modified lignin.This review offers valuable theoretical insights for the green production of modified lignin and its expanded applications.
基金supported by the National Key Research and Development Program of China (2018YFF0215001, 2017YFC0703100)the Innovative Research Groups of the National Natural Science Foundation of China (51621005)+1 种基金the National Natural Science Foundation of China (51676172)the Fundamental Research Funds for the Central Universities (2016FZA4010)
文摘Chemical synthetic residual is one of the solid wastes generated from pharmaceutical industry.The pyrolysis and combustion characteristics of chemical synthesis residual were investigated using a thermogravimetric analyser coupled with Fourier transform infrared spectroscopy(TG-FTIR)in this study.The processes of pyrolysis and combustion can be divided into three stages.The average weight loss rate of pyrolysis process at low temperature was higher than that of combustion.The kinetic parameters of chemical synthesis residual during pyrolysis and combustion were calculated based on the TG results.Acetic acid and 4-aminophenol were the main evolved matter observed in the pyrolysis process.The emission characteristics of combustion at low temperature were similar to that of the pyrolysis,while CO2 was found as the major gaseous product at high temperature.A high temperature about 850°C is needed to make sure the complete combustion of chemical synthesis residual.
