Lignin and styrene graft copolymer

Lignin and styrene graft copolymer

Benzene extraction of lignin using the grafting reaction with styrene , the test procedure is as follows : the pure styrene ( Sample A) was added to the conical flask, and passed N2 10min, lignin , CaCl2 , and dimethylsulfoxide (DMSO ) ( sample B) was added to another Erlenmeyer flask.

Drum gas 10min, H2O2 added to the sample B, the mixture was further drum gas 20min, added to the Sample A Sample B , stirred 5min, and continue with N2 gas , and then the flask was placed in 30 ℃ water bath was stirred 48h, after the reaction without any terminator , termination plus 10 times the volume of the mixture (pH = 2 ) acid , precipitate recovered by filtration .

The resulting product is a graft surfactant molecules , mainly in the phenylpropanoid grafted aromatic ring , a surfactant which can form a stable emulsion which can be further confirmed while covered with lignin – styrene connection birch graft copolymer can increase the contact angle of water , wood and polystyrene can also increase the connection strength, the formation properties of the copolymer used to design wood – thermoplastic composite.

Synthetic polymer grafted to the cellulose, lignin and other natural polymers are used on a large radical process method , however, is difficult to control by free radical grafting method the molecular mass , while the presence of the grafting product various types of bond type connection , contains a lot of homopolymer. And difficult to repeat grafting , graft yield and some other characteristics .

In view of the above problems, the product obtained by the method of such grafting is not well as a surfactant . Using a new synthetic method can well control the lignin skeleton and molecular weight of the product after the graft , the graft ratio and graft control connection key type , nature is relatively stable , that is a low molecular weight dispersion of small lignin with a molecular weight of anionic polymerization of styrene , by replacing the lignin macromolecule obtained methylsulfonyl structure determination of lignin – styrene copolymer. Then extracted unreacted styrene toluene , the residue ( toluene -insoluble ) was grafted product.

Recommended Posts


lignin Details

Lignin is a complex and highly abundant organic polymer found in the cell walls of plants, particularly in woody tissues. It is one of the main components of lignocellulosic biomass, along with cellulose and hemicellulose. Lignin provides structural support to plants and plays a crucial role in the transportation of water, nutrients, and sugars throughout […]


Magnesium Lignosulfonate Benefits

Magnesium lignosulfonate offers several benefits in various applications. Here are some key benefits of using magnesium lignosulfonate:

lignosulfonate binding agent

Magnesium Lignosulfonate as a Binding Agent

Magnesium lignosulfonate can be used as a binding agent in various applications. Here are some key points regarding the use of magnesium lignosulfonate as a binding agent:

string(15) "sidebar_layouts"

This site is protected by