Zenziwa njani ii-cellulose esters?

I-cellulose esters yiklasi yezixhobo ezenziwe xa i-cellulose iphendulwa nge-asidi okanye utywala. Imveliso ephumayo iyinto echasene kakhulu namanzi, ubushushu, kunye neekhemikhali. I-cellulose esters isetyenziswa kwiintlobo ngeentlobo zezicelo, kubandakanywa iingubo, i-adhesives, kunye neeplastiki.

I-cellulose esters yenziwa ngokuphendula i-cellulose nge-asidi okanye utywala. Ukusabela ngokuqhelekileyo kuqhutyelwa phambi kwe-catalyst, njenge-asidi ye-sulfuric, kunye nokushisa okuphezulu. Ukusabela kuvelisa iintlobo ezahlukeneyo ze-esters, kuxhomekeke kuhlobo lwe-asidi okanye utywala obusetyenzisiweyo.

Ezona zixhaphakileyo ze-cellulose esters yi-cellulose acetate, i-cellulose propionate, kunye ne-cellulose butyrate. I-cellulose acetate yenziwa xa i-cellulose iphendulwa nge-acetic acid. I-Cellulose propionate yenziwa xa i-cellulose iphendulwa ngepropionic acid. I-cellulose butyrate yenziwa xa i-cellulose iphendulwa nge-butyric acid.

I-cellulose esters nayo inokuveliswa ngokusabela i-cellulose ngotywala. Utywala obuqhelekileyo obusetyenziselwa le njongo yi-methanol, i-ethanol, kunye ne-isopropanol. Ukusabela kuvelisa iintlobo ezahlukeneyo ze-esters, kuxhomekeke kuhlobo lotywala olusetyenzisiweyo.

I-cellulose esters nayo inokuveliswa ngokuphendula i-cellulose kunye ne-esterifying agent, njenge-glycerol okanye i-ethylene glycol. Le mpendulo ivelisa iindidi ezahlukeneyo ze-ester, kuxhomekeke kuhlobo lwe-esterifying agent esetyenzisiweyo.

I-cellulose esters nayo inokuveliswa ngokuphendula i-cellulose kunye ne-halogenating agent, njenge-chlorine okanye i-bromine. Le mpendulo ivelisa iindidi ezahlukeneyo ze-esters, kuxhomekeke kuhlobo lwe-agent ye-halogenating esetyenzisiweyo.

I-cellulose esters nayo inokuveliswa ngokuphendula i-cellulose kunye ne-oxidizing agent, efana ne-hydrogen peroxide. Le mpendulo ivelisa iindidi ezahlukeneyo ze-ester, kuxhomekeke kuhlobo lwe-agent oxidizing esetyenziswayo.

I-cellulose esters nayo inokuveliswa ngokuphendula i-cellulose kunye ne-aminating agent, njenge-ammonia okanye i-amine. Le mpendulo ivelisa iindidi ezahlukeneyo ze-esters, kuxhomekeke kuhlobo lwe-aminating agent esetyenziswayo.

I-cellulose esters nayo inokuveliswa ngokuphendula i-cellulose kunye ne-agent yokunciphisa, njenge-sodium borohydride okanye i-lithium aluminium hydride. Le mpendulo ivelisa iindidi ezahlukeneyo ze-ester, kuxhomekeke kuhlobo lwe-arhente yokunciphisa esetyenzisiweyo.

I-cellulose esters nayo inokuveliswa ngokuphendula i-cellulose kunye ne-agent edibeneyo edibeneyo, njenge-dialdehyde okanye i-disocyanate. Le mpendulo ivelisa iindidi ezahlukeneyo ze-ester, kuxhomekeke kuhlobo lwe-agent edibanisayo esetyenzisiweyo.

I-cellulose esters nayo inokuveliswa ngokuphendula i-cellulose kunye ne-polymerizing agent, njenge-vinyl monomer okanye i-polyester. Le mpendulo ivelisa iindidi ezahlukeneyo ze-ester, kuxhomekeke kuhlobo lwe-agent esebenzayo esetyenzisiweyo.

I-cellulose esters nayo inokuveliswa ngokuphendula i-cellulose kunye ne-ejenti yokunyanga, njenge-epoxy okanye i-polyurethane. Le ndlela yokusabela ivelisa iintlobo ngeentlobo zee-ester ezahlukeneyo, ngokuxhomekeke kuhlobo lwe-arhente yokunyanga esetyenzisiweyo.

I-cellulose esters nayo inokuveliswa ngokuphendula i-cellulose kunye ne-agent ye-plasticizing, njenge-phthalate okanye i-polyethylene glycol. Le mpendulo ivelisa iindidi ezahlukeneyo ze-ester, kuxhomekeke kuhlobo lwe-agent ye-plasticizing esetyenzisiweyo.

I-cellulose esters nayo inokuveliswa ngokuphendula i-cellulose kunye ne-surfactant, njenge-nonionic okanye i-anionic surfactant. Le ntshukumo ivelisa iintlobo ngeentlobo zee-ester ezahlukeneyo, kuxhomekeke kuhlobo lwe-surfactant esetyenzisiweyo.

I-cellulose esters nayo inokuveliswa ngokuphendula i-cellulose kunye ne-flame retardant, njenge-halogenated hydrocarbon okanye ikhompawundi ye-phosphorous. Le ndlela yokusabela ivelisa iindidi ezahlukeneyo ze-ester, kuxhomekeke kuhlobo lwe-flame retardant esetyenzisiweyo.

Ekugqibeleni, i-cellulose esters iveliswa ngokuphendula i-cellulose nge-asidi, i-alcohol, i-esterifying agent, i-halogenating agent, i-oxidizing agent, i-aminating agent, i-agent yokunciphisa, i-agent edibeneyo, i-polymerizing agent, i-agent yokunyanga. , into yokwenza iplastiki, i-surfactant, okanye i-flame retardant. Uhlobo lwe-ester oluveliswayo luxhomekeke kuhlobo lwe-reactant esetyenzisiweyo. I-cellulose esters isetyenziswa kwiintlobo ngeentlobo zezicelo, kubandakanywa iingubo, i-adhesives, kunye neeplastiki.