Ihe na-emetụta hydyysis nke pollylactic acid (Pla)
November 20, 2023
Ka ọ dị ugbu a, a kwa afọ nke plastics dị ihe dị ka nde 150, mgbe ojiji nke ihe mkpofu ego maka imepụta ihe dị ka 50% Uto nke osisi na anụmanụ, na-atụ egwu nlanarị nke ime na ahụ ike mmadụ, ma bụrụ onye na-eme ka ụwa dị ọcha. Ka ndị mmadụ na-akwụkwu ndị ọzọ ma nweekwa mmasị na nsogbu gburugburu ebe obibi, plastik na-eji nwayọọ nwayọọ. Dị ka poyester enyi gburugburu ebe obibi, phowlactic acid (pla) bụkwa ụdị ihe ndị a kacha eji eme ihe . Site na ezigbo biocom dị mma, mgbada na nnukwu nhazi, a na-ahụta anya zuru oke ma na-ahụta na ọ bụ otu n'ime ihe ọhụrụ "eco-ihe" dochie plastik. 1.degradition usoro nke pollactic acid (Pla) Dika ihe nke poyester, mmebi nke pollactic acidic a na-ekewa n'ime nkọcha hydrolytics dị mfe na mbibi Enzyme. Ndaba Hdrlyytic Hdrlyytic bụ mmeghachi omume nke ịkọ, na-amalite site na nnabata mmiri, mgbasa nke mmiri na-eme ka a na-ahụ maka acid na alkali na ọkara, onye Ester Bond Free hydrolysis na-enweghị nsogbu, ihe atụ nke molekule, ọnụego ngwa ngwa na oke molecular belatara na ụfọdụ, ihe nlele ahụ malitere igbari, na-emepụta ngwaahịa nrụpụta. Mgbada nke polyyyciatic na-ezighi ezi, hydylactic acid mbụ mbụ, hydrolysis mbụ na-eme ihe ụfọdụ, nke mere na enwere ike ịmepụta usoro mmebi ahụ.
2.facting na-emetụta hydysis na nkọ nke pollactic acid Ihe ndị na-emetụta hydylysis nke Plan nwere ike kewaa ụzọ abụọ: Njirimara ihe onwunwe na ọnọdụ hydrolysis. Ngwongwo onwunwe gụnyere usoro molecular, crystalkiaty nha na nkesa, usoro nke ihe owuwu, usoro ịkpụzi, usoro ịkpụ na adịghị ọcha, wdg.; Ọnọdụ hydrolysis gụnyere ph, okpomọkụ na iru mmiri, ọgwụgwụ radieshon, wdg, ihe ndị a enweghị onwe ha na mmetụta nke polymer mebiri emebi nke akwụkwọ ahụ, kama mmekọrịta nke ibe ha. 3. Mmetụta nke molecular owu Ihe owuwu molecular bụ ihe dị mkpa na-emetụta akụrụngwa nke ihe ndị sitere na Pla-Dabere. Researchersfọdụ ndị na-eme nchọpụta kwadebere, 4 nke a na-eji ngwa agha na-eji ihe dị iche iche na-eme ihe dị iche iche iji mụọ ihe ndị na-eme hydrolysis, nke dị elu ọnụ ọgụgụ nke ụdọ akwa, ọnụego ya. Nyocha ahụ nwere ike ịbụ eziokwu na polymers nwere akụkụ ndị nwere obere obere kristal na otu dị iche iche, ya mere nutunal ngwa ngwa karịa ndị nwere ihe owuwu. Ndị mmadụ na-agbanwe usoro nke plaịm site na mgbanwe ndị a na-agbanwe ma na-enwe ụdị cololymers dị iche iche na Pla dị ka matrix iji chịkwaa hydrix. Iji maa atụ, plga Cololimer, iwebata putDophilicy nke Pla ma belata ọkụ nke polymen, kamakwa ọ na-enyekwa ihe ọhụụ na ọrụ. Ihe hydrophical nke ìgwè ewebata a webatara na usoro hydrolysis nke polymers na ngbanwe ngwakọta, ka mma hydrophicity, ka ọ dịkwuo n'anya hydrophytic, ka ọ dịkwuo mkpa.
4. Mmetụta nke kristal PLA bụ crystalline ihe, mana ọ bụrụ na plaịm na-enweghị ike iru 100%, ma ọ bụ ihe aecorphous mpaghara (mpaghara amorphous). Na usoro hydrolysis nke pla, hydrolysis na-ebu ụzọ na-ebu ụzọ na mpaghara Amorphous. Mmiri buru ụzọ banye n'ime Amorphous Mpaghara, nke mere na a na-agbajikwa ogige amorphosed, mgbe ọtụtụ amorphous mpaghara na-amalite hydrolyze mpaghara ahụ na-amalite hydrolyze. O kwesiri iburu n'uche na, na usoro pla hydrolysis, na-esokarị ihe ịtụnanya nke oke kristal, nke nwere ike ịbụ ihe hydrolysis nke mpaghara Amorphous, ọgbọ nke ọtụtụ ihe eji eme ihe Cricstine mkpu. Researchersfọdụ ndị na-eme nchọpụta kwenyere na mmụba nke kristal bụ n'ihi hydrolysis nke mpaghara Amorphous, nke na-abawanye ngwa ngwa nke mpaghara Crystal dị na ebe a. 5. Mmetụta nke usoro nke usoro N'ihi ngwaanirum acid nke lactic acid, Pla nwekwara cubes dị iche iche, PLLA, nke polymerization nke polymerization nke acid acid; PDla, nke polymerization nke acid d-lactic acid; Pdlla, nke polymerization nke dị ala na-acha ọcha na-acha ọcha na obere nke l-lactic acid na d-lactic acid; na p (l / d) LA, nke a na-eme site na plla na PDla na oke. Onye na-eme nchọpụta jiri ihe hydrolysis nke Plla, Pdlla, Pdla, Pdla, na P (L / D) LA, na Pdlla kacha mfe na hddleyze; Plla na PDla bụ ndị kachasị mfe na hrdolyze, na p (l / d) la nwere ike iguzogide hydrolysis siri ike.
