Starch ethers bụ ụdị starch emezigharịrị nke enwetala nlebara anya zuru oke na ngwa ụlọ ọrụ dị iche iche n'ihi ike ha na ihe pụrụ iche. Ọ bụ ezie na a na-ejikarị ya eme ihe na adhesives maka ike njikọ ya, ọ dabara maka gburugburu okpomọkụ dị elu na-adabere n'ọtụtụ ihe.
1. Okwu mmalite nke starch ether:
Starch ethers bụ ihe ndị sitere na starch obodo, nke bụ polysaccharides dị na osisi. Site na mgbanwe kemịkalụ, na-emetụtakarị etherification, a na-emepụta starch ethers iji kwalite ihe onwunwe ha ma mee ka ha dịkwuo mma maka ngwa ngwa. Usoro mgbanwe na-agbanwe ihe hydrophilic na hydrophobic nke starch, si otú ahụ na-eme ka nkwụsi ike, solubility na rheological Njirimara.
2. Njirimara nke starch ether:
Starch ethers nwere ọtụtụ isi ihe na-eme ka ha mara mma maka ngwa ụlọ ọrụ dị iche iche, gụnyere adhesives. Njirimara ndị a gụnyere:
A. Mmiri Soluble: Starch ethers bụ mmiri soluble na enwere ike itinye ya ngwa ngwa n'ime usoro nrapado ma kwalite ezigbo wetting Njirimara.
b. Ikike imepụta ihe nkiri: Starch ethers nwere ike imepụta ihe nkiri na-enyere aka nrapado na-arapara n'elu ma na-enye ike na ihe nrapado.
C. Thickener: Ọ na-eme dị ka a thickener na nrapado formulations, na-emetụta viscosity na mma ngwa àgwà.
d. Biodegradability: Starch ethers sitere na akụrụngwa enwere ike imeghari ya mere ọ dị mma na gburugburu ebe obibi ma dabara adaba maka ngwa na-elekwasị anya na nkwado.
3. Ngwa nrapado nke starch ether:
Enwere ike iji ether starch mee ihe n'ụdị nrapado dị iche iche, dịka:
A. Adhesives akwụkwọ na nkwakọ ngwaahịa: A na-ejikarị ethers starch eme ihe na mpempe akwụkwọ na nkwakọ ngwaahịa n'ihi imepụta ihe nkiri na nrapado ha.
b. Adhesives ihe owuwu: Mmiri solubility na ike nke starch ether na-eme ka ọ dị mma maka iji ya dị ka ihe nkwụnye ihe owuwu iji nyere aka jikọta ihe ụlọ.
C. Adhesives osisi: N'ime ụlọ ọrụ na-arụ ọrụ osisi, a na-eji starch ethers mee ihe n'ime ihe eji eme ihe na-eme ka ike dị ike ma nye nkwụsi ike.
d. Adhesives textile: A na-eji starch ether eme ihe na nrapado textile n'ihi ike ya ijikọ eriri ma mee ka ike zuru ezu nke ákwà ahụ dịkwuo elu.
4. Arụmọrụ na ọnọdụ okpomọkụ dị elu:
Maka ngwa ebe okpomọkụ dị elu na-ezute, arụmọrụ nke starch ethers na gburugburu okpomọkụ dị elu bụ ihe dị oké mkpa. Enwere ọtụtụ ihe na-emetụta omume ya na nke a:
A. Thermal Stability: Starch ethers na-egosipụta ogo dị iche iche nke nkwụsi ike okpomọkụ dabere na ogo ngbanwe ha na mgbanwe mgbanwe kemịkalụ akọwapụtara n'oge usoro etherification.
b. Gelatinization okpomọkụ: Gelatinization okpomọkụ nke starch ether bụ isi ihe n'ime ngwa okpomọkụ dị elu na ịdị arọ ya na ogo nke nnọchi ga-emetụta ya.
C. Viscosity mgbanwe: Oke okpomọkụ nwere ike ịgbanwe viscosity nke nrapado formulations nwere starch ethers. Ịghọta mgbanwe ndị a dị oke mkpa iji hụ na arụmọrụ nrapado na-agbanwe agbanwe.
d. Ike nkekọ: Ike njikọ nke usoro nwere starch ethers nwere ike imetụta ọnọdụ okpomọkụ, ya mere a chọrọ nghọta nke ọma nke ngwa chọrọ.
5. Atụmatụ mgbanwe maka nkwụsi ike dị elu:
Iji kwalite ngwa ngwa nke starch ether na gburugburu okpomọkụ dị elu, enwere ike ịnakwere usoro mgbanwe ndị a:
A. Cross-linking: Cross-linking starch ether molecules na-eme ka nkwụsi ike nke okpomọkụ na iguzogide mgbanwe viscosity okpomọkụ na-ebute.
b. Ịgwakọta na polymer na-eguzogide okpomọkụ: Ijikọta starch ethers na okpomọkụ na-eguzogide polymer nwere ike ịmepụta ngwakọ nrapado formulations na-ejigide nkwụsi ike na elu okpomọkụ.
C. Mgbanwe kemịkalụ: Mgbanwe ndị ọzọ kemịkalụ, dị ka mmeghe nke ndị na-arụ ọrụ na-eguzogide okpomọkụ, nwere ike nyochaa iji kwado starch ethers maka ngwa okpomọkụ dị elu.
6. Ọmụmụ ikpe na ngwa bara uru:
Inyocha ihe ọmụmụ ihe gbasara ụwa na ngwa bara uru na-enye nghọta bara uru na arụmọrụ nke starch ethers na gburugburu okpomọkụ dị elu. Ụlọ ọrụ ebe nguzogide okpomọkụ dị oke egwu, dị ka ụgbọ ala, ikuku ikuku na ngwá electronic, nwere ike ịnye ihe atụ bara uru.
7. Ihe gbasara gburugburu ebe obibi:
Ka nchegbu gburugburu ebe obibi na-adịwanye mkpa, biodegradability nke starch ethers na-agbakwụnye uru dị ukwuu. Na-enyocha mmetụta gburugburu ebe obibi nke usoro nrapado nwere starch ethers na ngwa okpomọkụ dị elu maka omume na-adigide.
8. Ntuzi aka n'ọdịnihu na ohere nyocha:
Nnyocha na-aga n'ihu na mmepe na mpaghara starch ether modification nwere ike imeghe ohere ọhụrụ maka ngwa ya na gburugburu okpomọkụ dị elu. Ịchọgharị usoro mgbanwe ọhụrụ, ịghọta usoro dị n'okpuru nke nkwụsi ike nke okpomọkụ, na ịchọpụta mmekọrịta ya na polymers ndị ọzọ bụ ebe kwesịrị ekwesị nyocha.
9. Nkwubi okwu:
Na nchịkọta, starch ethers bụ ndị na-ekwe nkwa maka ngwa nrapado, nwere ọtụtụ ihe ndị a na-achọsi ike. Ọrụ ya na gburugburu ebe okpomọkụ dị elu na-adabere na iji nlezianya tụlee ihe ndị dị ka nkwụsi ike nke okpomọkụ, okpomọkụ gelatinization na ike njikọ. Site na mgbanwe usoro na usoro ihe ọhụrụ, starch ethers nwere ike ịhazi ya iji dozie nsogbu ndị dị iche iche nke okpomọkụ dị elu na-ebute, na-emepe ụzọ ọhụrụ maka iji ha na ụlọ ọrụ ebe okpomọkụ dị oke mkpa. Ka nyocha na-aga n'ihu, ọrụ nke starch ethers na ngwa ntanye nwere ike gbasaa, na-eme ka ọnọdụ ha dịkwuo ike dị ka ihe ndị na-emepụta ihe na-emepụta ihe na-adịgide adịgide.
Oge nzipu: Dec-02-2023