Uru nke ihe nkiri nkwakọ ngwaahịa PLA

PLA bụ otu n'ime ihe ndị a na-enyochakarị ma lekwasịrị anya biodegradable ma n'ime ụlọ na nke mba ụwa, yana ọgwụ, nkwakọ ngwaahịa na ngwa fiber bụ mpaghara ngwa atọ a ma ama. A na-eme PLA site na lactic acid eke, nke nwere ezigbo biodegradability na biocompatibility. Ibu okirikiri ndụ ya na gburugburu ebe obibi dị obere karịa nke ihe ndị sitere na mmanụ ala, a na-ewerekwa ya dị ka ihe nkwakọ ngwaahịa akwụkwọ ndụ akwụkwọ ndụ kacha mma.

Enwere ike imebi polylactic acid (PLA) kpamkpam n'ime carbon dioxide na mmiri n'okpuru ọnọdụ eke mgbe a tụfuru ya. Ọ nwere ezigbo mmiri na-eguzogide mmiri, ihe ndị na-emepụta ihe, ihe ndị dị ndụ, nwere ike ịmịnye ya site na ntule, ọ nweghịkwa mmetọ na gburugburu ebe obibi. PLA nwekwara ezigbo ihe eji arụ ọrụ. Ọ nwere ike nguzogide dị elu, mgbanwe dị mma na nkwụsi ike nke okpomọkụ, plasticity, processability, no discoloration, ezigbo permeability na oxygen na vapor mmiri, yana nghọta dị mma, mgbochi ebu na antibacterial Njirimara, na-arụ ọrụ nke 2-3 afọ.

Nkwakọ nri dabere na ihe nkiri

Ihe ngosi arụmọrụ kachasị mkpa nke ihe nkwakọba ihe bụ iku ume, na mpaghara ngwa ngwa nke ihe a na nkwakọ ngwaahịa nwere ike ikpebi dabere na ume iku ume ya dị iche iche. Ụfọdụ ihe nkwakọ ngwaahịa chọrọ ikuku oxygen iji nye ikuku oxygen zuru oke na ngwaahịa; Ụfọdụ ihe nkwakọ ngwaahịa chọrọ ihe mgbochi oxygen n'ihe gbasara ihe onwunwe, dị ka maka nkwakọ ngwaahịa ihe ọṅụṅụ, nke na-achọ ihe ndị nwere ike igbochi ikuku oxygen ịbanye na nkwakọ ngwaahịa ma si otú ahụ gbochie uto ebu. PLA nwere ihe mgbochi gas, ihe mgbochi mmiri, nghọta, yana ezigbo mbipụta.

nghọta

PLA nwere ezigbo nghọta na glossiness, yana ọmarịcha arụmọrụ ya dị ka nke akwụkwọ iko na PET, nke plastik ndị ọzọ nwere ike imebi enweghị. Nghọta na glossiness nke PLA bụ 2-3 ugboro nke ihe nkiri PP nkịtị na 10 ugboro nke LDPE. Nghọta ya dị elu na-eme ka ojiji PLA dị ka ihe nkwakọ ngwaahịa mara mma. Maka nkwakọ ngwaahịa swiiti, ugbu a, ọtụtụ ngwugwu swiiti na ahịa na-ejiIhe nkiri nkwakọ ngwaahịa PLA.

Ọdịdị na arụmọrụ nke aihe nkiri nkwakọ ngwaahịayiri ihe nkiri nkwakọ ngwaahịa swiiti ọdịnala, nwere nghọta dị elu, njigide eriri mara mma, ibipụta, na ike. O nwekwara ezigbo ihe mgbochi, nke nwere ike ichekwa ísì ụtọ nke swiiti.

ihe mgbochi

Enwere ike ịme PLA ka ọ bụrụ ngwaahịa ihe nkiri dị mkpa nke nwere nghọta dị elu, ihe mgbochi dị mma, nhazi usoro, na ihe eji arụ ọrụ, nke enwere ike iji maka nkwakọ ngwaahịa na-agbanwe agbanwe nke mkpụrụ osisi na akwụkwọ nri. Ọ nwere ike ịmepụta ebe nchekwa kwesịrị ekwesị maka mkpụrụ osisi na akwụkwọ nri, nọgide na-adị ike, na-egbu oge ịka nká, na-echekwa agba, ísì, uto, na ọdịdị ha. Mana mgbe etinyere ya na ngwa nkwakọ ngwaahịa nri, a ka chọrọ mgbanwe ụfọdụ iji kwekọọ na njirimara nri n'onwe ya, iji nweta nsonaazụ nkwakọ ngwaahịa ka mma.

Dịka ọmụmaatụ, n'ime ngwa ndị bara uru, nyocha achọpụtala na fim ndị agwakọtara dị mma karịa ihe nkiri dị ọcha. He Yiyao ji ihe nkiri PLA dị ọcha na ihe nkiri PLA mejupụtara brọkọlị, ma chekwaa ya na (22 ± 3) ℃. Ọ na-anwale mgbe niile mgbanwe dị iche iche physiological na biochemical egosi broccoli n'oge nchekwa. Nsonaazụ gosiri na ihe nkiri mejupụtara PLA nwere mmetụta nchekwa dị mma na broccoli echekwara na ụlọ okpomọkụ. Ọ nwere ike ịmepụta ọkwa iru mmiri na ikuku a na-achịkwa n'ime akpa nkwakọ ngwaahịa nke na-enyere aka ịhazi iku ume broccoli na metabolism, na-ejigide ọdịdị broccoli na ichekwa ụtọ na uto mbụ ya, si otú a na-agbatị ndụ broccoli n'ime ụlọ okpomọkụ site na 23. ụbọchị.

Antibacterial ọrụ

PLA nwere ike ịmepụta gburugburu acidic na-adịghị ike n'elu ngwaahịa ahụ, na-enye ihe ndabere maka ihe ndị na-egbu egbu na mgbochi. Ọ bụrụ na ejiri ọgwụ nje ndị ọzọ na-ejikọta ọnụ, ọnụ ọgụgụ nje bacteria nwere ike iru karịa 90%, na-eme ka ọ dị mma maka nkwakọ ngwaahịa antibacterial. Yin Min mụrụ mmetụta nchekwa nke ụdị ọhụrụ PLA nano antibacterial composite film na nri ero na-eji Agaricus bisporus na Auricularia auricula dị ka ihe atụ, iji gbatịa ndụ nke ero nri ma nọgide na-adị mma. Nsonaazụ gosiri na ihe nkiri PLA/ rosemary mmanụ dị mkpa (REO)/AgO nwere ike igbu oge n'ụzọ dị irè mbelata ọdịnaya vitamin C na auricularia auricula.

E jiri ya tụnyere ihe nkiri LDPE, ihe nkiri PLA, na ihe nkiri PLA / GEO / TiO2, ikike mmiri nke PLA / GEO / Ag composite film dị elu karịa nke ihe nkiri ndị ọzọ. Site na nke a, enwere ike kwubie na ọ nwere ike igbochi nguzobe nke mmiri na-ekpo ọkụ ma nweta mmetụta nke igbochi uto microbial; N'otu oge ahụ, ọ nwekwara mmetụta antibacterial magburu onwe ya, nke nwere ike igbochi mmepụta nke microorganisms n'oge nchekwa nke ntị ọla edo, ma nwee ike ịgbatị ndụ ndụ ruo ụbọchị 16.

E jiri ya tụnyere ihe nkiri nri nri PE nkịtị, PLA nwere mmetụta ka mma

Tulee mmetụta nchekwa nkeIhe nkiri plastik PEkechie na ihe nkiri PLA na broccoli. Nsonaazụ gosiri na iji ngwugwu ihe nkiri PLA nwere ike igbochi ịcha edo edo na bọlbụ nke broccoli, na-edobe ọdịnaya nke chlorophyll, vitamin C, na soluble na broccoli nke ọma. Ihe nkiri PLA nwere ezigbo ikike nhọrọ gas, nke na-enyere aka ịmepụta ebe nchekwa O2 dị ala na CO2 dị elu n'ime akpa nkwakọ ngwaahịa PLA, si otú ahụ na-egbochi ọrụ ndụ nke broccoli, na-ebelata mmiri na-efunahụ na nri nri. Nsonaazụ gosiri na ma e jiri ya tụnyere nkwakọ ngwaahịa plastik PE, nkwakọ ihe nkiri PLA nwere ike ịgbatị ndụ broccoli na ụlọ okpomọkụ site na ụbọchị 1-2, yana mmetụta nchekwa ahụ dị oke mkpa.