Kwiga kuri selulose etherification yo guhindura no gushyira muburyo bwo gusiga irangi ryanditse

Kuva amarangi atagaragara mu kinyejana gishize, sodium alginate (SA) niyo yabaye intandaro yo gucapa irangi ryoroshye ku mwenda w'ipamba.

paste. Nyamara, hamwe nogukomeza kunoza ibyo abantu bakeneye kugirango bashobore gucapa, sodium alginate nka paste yo gucapa ntabwo irwanya aside ikomeye na alkali.

Kandi ibishushanyo mbonera byubatswe ni bito, kubwibyo gukoreshwa muburyo bwo kuzenguruka (buringaniye) gucapisha bigarukira ku rugero runaka;

Igiciro cya sodium alginate nacyo kirazamuka, abantu rero batangiye ubushakashatsi kubindi bisobanuro, selulose ether nimwe mubyingenzi.

ubwoko. Ariko kuri ubu ibikoresho nyamukuru bikoreshwa mugutegura selile ether ni ipamba, umusaruro wacyo uragabanuka, kandi igiciro nacyo kiriyongera

Byongeye kandi, imiti ikoreshwa cyane nka aside ya chloroacetike (uburozi bukabije) na okiside ya Ethylene (kanseri) nayo yangiza umubiri wumuntu nibidukikije.

Urebye ibi, muri iyi nyandiko, selile ya selulose yakuwe mu myanda y’ibimera, naho sodium chloroacetate na 2-chloroethanol byakoreshwaga nka etherifingi yo gutegura karubasi.

Ubwoko butatu bwa fibre: methyl selulose (CMC), hydroxyethyl selulose (HEC) na hydroxyethyl carboxymethyl selulose (HECMC)

bitatuselile ethersna SA byakoreshwaga kumyenda y'ipamba reaction yo gusiga irangi, kandi ingaruka zo gucapa zagereranijwe kandi zirigwa.

imbuto. Ibyingenzi byubushakashatsi bikubiye muri sisitemu bigabanyijemo ibice bitatu:

(1) Kuramo selile mu myanda y'ibihingwa. Binyuze mu gutunganya imyanda itanu y ibihingwa (ibyatsi byumuceri, umuceri wumuceri, ibyatsi by ingano, ibiti byinanasi

na bagasse) kugirango hamenyekane no gusesengura ibice (ubushuhe, ivu, lignine, selile na hemicellulose), byatoranijwe

Ibikoresho bitatu byerekana ibihingwa (ibiti bya pinusi, ibyatsi by ingano na bagasse) bikoreshwa mugukuramo selile, hanyuma havamo selile.

Inzira yari nziza; mugihe cyogutezimbere uburyo bwiza, ibyiciro bya pine selulose, ibyatsi byatsi selile na bagasse selulose byabonetse.

Isuku iri hejuru ya 90%, kandi umusaruro uri hejuru ya 40%; irashobora kugaragara uhereye kubisesengura rya infragre spracre na ultraviolet absorption spekure yanduye

Lignin na hemicellulose byavanyweho ahanini, kandi selile yabonetse ifite ubuziranenge bwinshi; birashobora kugaragara mubisesengura rya X-ray ko bisa nibikoresho fatizo byibimera.

Mugereranije, ugereranije na kristu yibicuruzwa byabonetse byateye imbere cyane.

(2) Gutegura no kuranga selile ya selile. Hifashishijwe ibiti bya pinusi selile yakuwe mu biti bya pinusi nkibikoresho fatizo, hakozwe ubushakashatsi bumwe.

Inzira yibanze ya alkali decrystallisation yo kwitegura pine selulose yari nziza; no mugushushanya imitekerereze ya orthogonal hamwe nubushakashatsi bumwe ,.

Inzira zo gutegura CMC, HEC na HECMC ziva mubiti bya pinusi alkali selulose byateguwe neza;

Habonetse CMC hamwe na DS kugeza kuri 1.237, HEC hamwe na MS kugeza kuri 1.657, na HECMC hamwe na DS ya 0.869. Dukurikije isesengura rya FTIR na H-NMR, amatsinda ya ether ahuye yinjijwe mu bicuruzwa bitatu bya selile;

Imiterere ya kristu ya ethers isanzwe CMC, HEC na HEECMC byose byahindutse mubwoko bwa selile II, kandi kristu yagabanutse cyane.

(3) Gukoresha selile ya ether paste. Ubwoko butatu bwa selile ethers yateguwe mugihe cyiza cyakoreshejwe kumyenda y'ipamba

Byacapishijwe irangi ryoroshye kandi ugereranije na sodium alginate. Ubushakashatsi bwerekanye ko SA, CMC, HEC na HECMC ibintu bine bitera

Amapasi yose ni amavuta ya pseudoplastique, kandi pseudoplastique ya ether eshatu ya selile iruta iya SA; gahunda yikigereranyo cyo gushiraho paste enye

Ni: SA> CMC> HECMC> HEC. Kubijyanye no gucapa ingaruka, CMC igaragara ibara ryumusaruro no kwinjira, gucapa intoki

Sensitivity, gucapa amabara yihuta, nibindi bisa na SA, kandi igipimo cya depaste ya CMC kiruta SA;

SA irasa, ariko HEC igaragara ibara ry'umusaruro, ubworoherane no kwihuta biri munsi ya SA; Icapiro rya HECMC umva, irwanya irwanya

Ibara ryihuta ryo guswera risa na SA, kandi igipimo cyo gukuraho paste kiri hejuru ya SA, ariko umusaruro ugaragara wamabara hamwe nububiko bwa HEECMC biri munsi ya SA.

Amagambo y'ingenzi: imyanda y'ibihingwa; selile; selile ether; guhindura etherification; gucapa irangi;