Influence Of The Structure Of The1,3,5-triazine’s Deirvates On The Hydrolysis Of The Modified Rice Straws

The key of producing fuel ethanol with lignocellulose is how to hydrolyze cellulose intofermentable sugars efficiently, but the low yield of fermentable sugar of hydrolysis ofcellulose is the bottle-neck problem in biomass utilization. A creative idea was proposedthat based on the cellulose fabric dyed reactive dyes owns the caaracter of “reactive tendering”. The aim of a new way is to improve the yield of hydrolysis by the crystal structural changeof cellulose based on chemical modification. The hydrolysis of modified celluloses werestudied which is based on reaction of reactive dyes and cellulose. New1,3,5-triazinederivatives, which have different substituent groups, were synthesized from cyanuric chloridewith various compounds. The hydrolysis of modified celluloses were studied which is basedon reaction of1,3,5-triazine derivatives and cellulose.2,4,6-trichloro-1,3,5-triazine derivatives with different number of ‘C’, water-solublegroups and number of substitution were synthesized successfully through nucleophilicsubstitution reaction between cyanuric chloride, ethylamine, aminopropionic acid,aminoethanesulfonic acid and amino caproic acid. New1,3,5-triazine derivatives, which were2-hydroxy-4,6-dichloro-1,3,5-triazine,2-N-carboxyethylamino-4-hydroxy-6-chloro-1,3,5-triazine,2-carboxyamylamino-4-hydroxy-6-chloro-1,3,5-triazine,2-N-ethylamino-4-hydroxy-6-chloro-1,3,5-triazine,2-N-taurine-4-hydroxy-6-chloro-1,3,5-triazine,2-aminoethylsulfonic acid-4,6-dichloro-1,3,5-triazine and2,4-diaminoethylsulfonicacid-6-chloro-1,3,5-triazine were used as modifiers and reacted with straws under chemicalmodification. The structure of target products were determined by IR, HPLC/MS and13CNMR spectrometer. Straws were chemically modified with2,4,6-trichloro-1,3,5-triazinederivatives. The chemical and crystal structures of modified straws were analyzed by IR andWAXD, respectively.The hydrolysis process of original straws and modified straws was under the condition of30%wt sulfuric acid,1:30solid-liquid ratio and oscillating4h at the temperature of343K.The experimental result illustrated that the crystal of modified straws have some changescompared to original straws and that Y, R002and CrI vary with the dosage of modifier. Thehydrolysis showed that it was obviously inhibited when the longer of the carbon chain of2,4,6-trichloro-1,3,5-triazine derivatives modified straws by compare original straws with thedifferent number of ‘C’of2,4,6-trichloro-1,3,5-triazine derivatives modified straws. Theexperimental result illustrated that hydrolysis was significantly increased when the highhydrophilia of2,4,6-trichloro-1,3,5-triazine derivatives modified straws by compare originalstraws with that of the different water-soluble groups of2,4,6-trichloro-1,3,5-triazinederivatives modified straws. The hydrolysis result showed that hydrolysis was markedlyinhibited when the greater number of substitution of2,4,6-trichloro-1,3,5-triazine derivativesmodified straws by compare original straws with that of the different number of substitutionof2,4,6-trichloro-1,3,5-triazine derivatives modified straws.