Eteri za sitashi ni ubwoko bwa sitashi bwahinduwe bwakunzwe cyane mu nganda zitandukanye bitewe n’ubushobozi bwazo bwo gukora ibintu bitandukanye n’imiterere yihariye. Nubwo ikoreshwa cyane mu gufunga ibintu bitewe n’ubushobozi bwayo bwo gufatanya, kuba ikwiriye ahantu hashyuha cyane biterwa n’ibintu byinshi.
1. Intangiriro kuri eteri ya sitashi:
Eteri za sitashi ni ibikomoka kuri sitashi gakondo, ari byo polysaccharides biboneka mu bimera. Binyuze mu guhindura imiti, akenshi biganisha kuri eteri, eteri za sitashi zikorwa kugira ngo zongere imiterere yazo kandi zirusheho gukoreshwa mu buryo bwihariye. Uburyo bwo guhindura buhindura imiterere ya sitashi inyura mu mazi n'amazi, bityo bikanoza imiterere yayo ihamye, ishonga ndetse n'imiterere ya rheological.
2. Imiterere ya eteri ya sitashi:
Eteri za sitashi zifite imiterere myinshi y'ingenzi ituma zikurura abantu mu nganda zitandukanye, harimo n'ibirungo. Iyi miterere irimo:
A. Amazi Ashongera: Ifu ya sitashi ishongera amazi kandi ishobora gushyirwa mu buryo bworoshye mu buryo bwo gufatana no guteza imbere ubushobozi bwiza bwo kunywesha.
b. Ubushobozi bwo gukora firime: Ifu ya sitashi ishobora gukora firime zifasha kole gufata ku buso no guha imbaraga ibikoresho bya kole.
C. Ikora nk'inyunganizi mu miterere y'ubudodo, igira ingaruka ku bukonje no kunoza imiterere y'ikoreshwa.
d. Kubora: Ifu ya sitashi ikomoka ku bintu bishobora kongera gukoreshwa bityo ikaba irinda ibidukikije kandi ikwiriye gukoreshwa mu buryo bwibanda ku kurambye.
3. Gukoresha eteri ifata neza:
Eteri za sitashi zishobora gukoreshwa mu buryo butandukanye bwo gufatana, nko:
A. Kole zo gupfunyikaho impapuro n'udupfunyikaho: Eteri z'ibinyampeke zikunze gukoreshwa mu dupfunyikaho impapuro n'udupfunyikaho kubera ubushobozi bwazo bwo gukora filime no gufata neza.
b. Kole zo kubaka: Uburyo amazi ashonga n'ubushobozi bwo gukuba bwa eteri ya sitashi bituma ikoreshwa nk'ikole zo kubaka kugira ngo ifashe mu guhuza ibikoresho by'ubwubatsi.
C. Gufatana mu giti: Mu nganda zikora imbaho, eteri zikoreshwa mu gufatana mu giti kugira ngo zongere imbaraga zo gufatana no gutanga ubusugire.
d. Kole zo mu myenda: Ifu ya sitashi ikoreshwa mu kole zo mu myenda kubera ubushobozi bwayo bwo gufatanya insinga no kongera imbaraga rusange z'imyenda.
4. Imikorere mu bushyuhe bwinshi:
Ku birebana n'ikoreshwa ry'ibicuruzwa aho ubushyuhe bwinshi bugera, imikorere ya eteri za starch mu bushyuhe bwinshi ni ikintu cy'ingenzi cyane. Hari ibintu byinshi bigira ingaruka ku myitwarire yabyo muri iki gihe:
A. Gukomera ku bushyuhe: Eteri za sitashi zigaragaza urwego rutandukanye rw'ubushyuhe bitewe n'urwego rwazo rwo gusimbuza hamwe n'impinduka zihariye za shimi zakoreshejwe mu gihe cyo gukwirakwiza eteri.
b. Ubushyuhe bwa Gelatinization: Ubushyuhe bwa gelatinization bwa ether ya starch ni ikintu cy'ingenzi mu ikoreshwa ry'ubushyuhe bwinshi kandi bizagirwaho ingaruka n'uburemere bwayo bwa molekile n'urwego rwo kuyisimbura.
C. Impinduka mu bushyuhe: Ubushyuhe bwinshi bushobora guhindura ubushyuhe bw'ibice by'ubutare birimo eteri za starch. Gusobanukirwa izi mpinduka ni ingenzi kugira ngo habeho imikorere ihamye y'ubutare.
d. Ingufu z'Ubufatanye: Ingufu z'ubufatanye bw'ibinyabutabire birimo eteri za sitashi zishobora kugira ingaruka ku bushyuhe, bityo rero hakenewe gusobanukirwa neza ibisabwa kugira ngo bikoreshwe.
5. Ingamba zo guhindura uburyo ubushyuhe bukomeza kwiyongera:
Kugira ngo hongerwe uburyo eteri ya starch ikoreshwa mu bushyuhe bwinshi, ingamba zikurikira zo guhindura zishobora gukoreshwa:
A. Guhuza: Molekile za eteri zihuza starch zongera ubushyuhe buhamye no kurwanya impinduka z’ubushyuhe ziterwa n’ubushyuhe.
b. Kuvanga na polimeri zirinda ubushyuhe: Guhuza eteri za starch na polimeri zirinda ubushyuhe bishobora gukora imiterere ya hybrid adhesive ikomeza ubushyuhe mu gihe cy'ubushyuhe bwinshi.
C. Impinduka mu bya shimi: Izindi mpinduka mu bya shimi, nko gutangiza amatsinda y’imikorere arwanya ubushyuhe, zishobora gusuzumwa kugira ngo hakorwe eteri za starch ku buryo bwihariye bwo gukoresha mu bushyuhe bwinshi.
6. Inyigo z'ibyabaye n'ikoreshwa mu buryo bufatika:
Gusuzuma inyigo z’ibintu nyabyo n’ikoreshwa ryabyo bitanga ubumenyi bw’ingirakamaro ku mikorere ya starch ethers mu bidukikije birimo ubushyuhe bwinshi. Inganda aho ubushyuhe budashobora kwiyongera, nk’imodoka, indege n’ibikoresho by’ikoranabuhanga, zishobora gutanga ingero z’ingirakamaro.
7. Ibitekerezo ku bidukikije:
Uko ibibazo by’ibidukikije bigenda birushaho kuba ingenzi, ni ko ubushobozi bwa eteri za starch bwo kwangirika burushaho kwiyongera. Gusuzuma ingaruka z’ibice by’ubutare birimo eteri za starch ku bidukikije mu bikorwa birambye.
8. Ibyerekezo by'ejo hazaza n'amahirwe yo gukora ubushakashatsi:
Ubushakashatsi n'iterambere bikomeje mu bijyanye no guhindura eteri ya starch bishobora gutanga amahirwe mashya yo kuyikoresha mu bidukikije birimo ubushyuhe bwinshi. Gusuzuma uburyo bushya bwo guhindura, gusobanukirwa uburyo bw'ibanze bwo guhagarara neza k'ubushyuhe, no kumenya isano iri hagati y'izindi polymer ni ahantu hakwiye gukorwaho ubushakashatsi.
9. Umwanzuro:
Muri make, eteri za starch ni abakandida beza bo gukoresha kole, zifite imiterere itandukanye yifuzwa. Imikorere yazo mu bushyuhe bwinshi iterwa no gusuzuma neza ibintu nko guhagarara k'ubushyuhe, ubushyuhe bwa gelatinization n'imbaraga z'imibanire. Binyuze mu mpinduka z'ingamba n'uburyo bushya bwo gukora, eteri za starch zishobora guhindurwa kugira ngo zikemure ibibazo byihariye biterwa n'ubushyuhe bwinshi, bikingura inzira nshya zo kuzikoresha mu nganda aho kurwanya ubushyuhe ari ingenzi cyane. Uko ubushakashatsi bugenda butera imbere, uruhare rwa eteri za starch mu gukoresha kole rushobora kwaguka, bigakomeza gukomera nk'ibintu bikoreshwa mu buryo butandukanye kandi burambye.
Igihe cyo kohereza: Ukuboza-02-2023