I-cotton ecocekileyo-ukuvula-i-alkalizing-etherifying-neutralizing-ehlula-ukuhlamba-ukwahlula, ukomisa-i-pulverizing-ukupakisha-ukugqitywa kwe-cotton ukuvula: i-cotton ecocekileyo ivuliwe ukususa isinyithi, kwaye emva koko i-pulverized. Ikotoni ehlanjululweyo ehlanjululweyo ikwimo yepowder, kwaye ubukhulu bayo be-particle yi-80 mesh kunye ne-transmittance yi-100%. Kungenjalo, kulula ukuba agglomerate kunye ngexesha lenkqubo yokusabela kunye nokunciphisa ukusebenza etherification.
I-alkalization: Yongeza umqhaphu osulungekisiweyo owenziwe ngumgubo emva kokuvula kwi-solvent engasebenziyo, kwaye uyivule ngealkali kunye namanzi athambileyo ukudumba i-lattice yecotton esulungekisiweyo, enceda ekungeneni kwee-agent etherifying agent, kwaye iphucule ukufana kwe-etherification reaction. . I-alkali esetyenziswe kwi-alkalization yintsimbi ye-hydroxide okanye isiseko sezinto eziphilayo. Ubungakanani be-alkali eyongeziweyo (ngobunzima, obufana ngezantsi) yi-0.1-0.6 amaxesha e-cotton ecocekileyo, kunye nomthamo wamanzi athambileyo ngama-0.3-1.0 amaxesha ekotoni ecocekileyo; i-solvent inert ngumxube wotywala kunye ne-hydrocarbon, kwaye inani le-solvent ye-inert eyongeziweyo i-cotton ecocekileyo. Amaxesha angama-7-15: i-solvent ye-inert ingaba yi-alcohol kunye ne-3-5 i-athomu ye-carbon (njenge-alcohol, propanol), i-acetone. Isenokuba yi-aliphatic hydrocarbons kunye ne-aromatics hydrocarbons; iqondo lokushisa kufuneka lilawulwe ngaphakathi kwe-0-35 ° C ngexesha le-alkalization; ixesha alkalization malunga 1hr. Ukulungiswa kweqondo lokushisa kunye nexesha kunokumiselwa ngokweemfuno zezinto kunye nemveliso.
I-Etherification: Emva kokunyanga kwe-alkalization, phantsi kweemeko ze-vacuum, i-etherification iqhutyelwa ngokudibanisa i-etherifying agent, kunye ne-etherifying agent yi-propylene oxide. Ukuze kuncitshiswe ukusetyenziswa kwe-etherifying agent, kwinkqubo ye-etherification, i-ejenti ye-etherifying yongezwa ngamaxesha amabini, isixa esongezelelweyo sokuqala si-1-3.5 ngamaxesha e-cotton ecocekileyo, kunye nenani elipheleleyo lezongezo ezimbini. yi 1.5-4 amaxesha ukuba umqhaphu esulungekileyo. amaxesha. Emva kokuba ungeze i-agent etherifying okokuqala, gxuma kwiqondo lokushisa kwe-≤30 ° C kwi-45min-90min, uze ushushu ukuya kwi-50-100 ° C ye-etherification, ixesha li-1-5h, uze uphole phantsi ukuya ku-≤30. °C , Yongeza i-Jing etherified okwesihlandlo sesibini kwaye uvuselele, ixesha lokuvuselela yi-30-120min, kwaye emva koko ushushu ukuya kuthi ga? ? ? Ukuqhuba i-etherification, ixesha li-1-4h, ngeli xesha, ikotoni ecocekileyo kunye ne-etherifying agent isabela ngokupheleleyo ukuvelisa i-H-HPC.
I-Pulverization kunye nokupakishwa: imveliso eyomisiweyo yokuveliswa kwangoku iyahluzwa kwaye ihlulwe. Ubungakanani be-particle ye-pulverized and sieved product of the invention yangoku yi-40 mesh kunye ne-transmittance yi-10096, okanye ngokweemfuno zomsebenzisi. Yipakishe uyikhuphe kumzi-mveliso.
Ixesha lokuposa: Oct-13-2022