Polylactic acid bụ ihe na-emebi emebi na otu n'ime ihe eji eme eriri na-ekwe nkwa na narị afọ nke 21st.Polylactic acid (PLA)adịghị adị na okike ma na-achọ njikọ artificial. A na-esi n'ihe ọkụkụ dị ka ọka wit, sugar beet, akpu, ọka, na fatịlaịza organic na-amịpụta akụrụngwa lactic acid. Enwere ike nweta eriri polylactic acid, nke a makwaara dị ka eriri ọka, site na ntụgharị.
Mmepe nke eriri polylactic acid
A na-achọta lactic acid na yogọt. Mgbe e mesịrị, ndị ọkà mmụta sayensị chọpụtara na acid nke mmegharị ahụ ahụ na-emepụta n'ime anụmanụ na ụmụ mmadụ bụ lactic acid. Ihe mepụtara DuPont Corporation (onye mepụtara naịlọn) bụ onye mbụ jiri polymers lactic acid kwadebe ihe polylactic acid polymer n'ime ụlọ nyocha.
Nnyocha na mmepe nke eriri polylactic acid nwere akụkọ ihe mere eme nke ihe karịrị ọkara narị afọ. Cyanamid, ụlọ ọrụ America, mepụtara polylactic acid absorbable sutures na 1960s. Na 1989, Japan Zhong Fang na Shimadzu Manufacturing Institute jikọrọ aka ịzụlite ọcha spun polylactic acid fiber (LactonTM) na ngwakọta ya na eke emep uta eri (Corn FiberTM), nke e gosiri na 1998 Nagano Winter Games; Unijica Corporation nke Japan mepụtara polylactic acid filament na spunbond nonwoven ákwà (TerramacTM) na 2000. Cargill Dow Polymers (CDP) na United States (ugbu a NatureWorks) wepụtara a usoro nke ngwaahịa (IngeoTM) ekpuchi polylactic acid resins, eriri, na ihe nkiri na 2003, na TM nke Germany na-emepụta na-abụghị Trevira usoro. eji n'ubi dịka ụgbọ ala, akwa ụlọ, na ịdị ọcha.
Usoro na ntinye nke eriri polylactic acid
Ka ọ dị ugbu a, a na-eme akwa PLA na-abụghị nke a na-eji akwa anya dị ọcha L-polylactic acid (PLLA) dị ka akụrụngwa, na-eji kristal dị elu na njirimara nghazi ya, ma kwadebere ya site na usoro ntụgharị dị iche iche (agbaze agbaze, ịgba mmiri mmiri, ịgba akọrọ, ịgba mmiri mmiri, ịgbanye ọkụ eletrik, wdg). N'ime ha, agbaze spun polylactic acid fibers (ogologo eriri, obere eriri) nwere ike iji na ubi nke uwe, ụlọ textiles, wdg The mmepụta ngwá na usoro yiri polyester, na ezi spinnability na agafeghị oke arụmọrụ. Mgbe emezigharị kwesịrị ekwesị, eriri polylactic acid nwere ike nweta ihe na-egbochi ire ọkụ (na-ekpochapụ onwe ya) yana ihe ndị na-egbu egbu. Otú ọ dị, agbaze spun PLA eriri ka nwere ohere maka imeziwanye ike n'ibu, nkwụsi ike akụkụ okpomọkụ dị elu, nkwụsi ike na nguzogide ịka nká.
Ọkpụkpụ mmiri, ịgba akọrọ, ịgba mmiri mmiri akọrọ, na electrospinning nke polylactic acid fibers (membranes) bụ nke a na-ejikarị n'ọhịa biomedical. Ngwaahịa nọchitere anya gụnyere sutures nwere ike ịmịkọrọ ike dị elu, ndị na-ebu ọgwụ, akpụkpọ ahụ na-egbochi adhesion, akpụkpọ ahụ arụrụ arụ, scafolds engineering anụ ahụ, wdg.
Site na mmụba na-arịwanye elu maka ịkwanye akwa anaghị kpara akpa na ahụike, ịdị ọcha, filtration, ịchọ mma na mpaghara ndị ọzọ, akwa polylactic acid aghọọla otu n'ime ebe nyocha na mmepe mmepe.
N'afọ ndị 1990, Mahadum Tennessee dị na United States buru ụzọ mụọ polylactic acid spunbond ma gbazee akwa ndị na-adịghị akwa. Zhongfang nke Japan mechara mepụta polylactic acid spunbond akwa na-abụghị nke maka ngwa ọrụ ugbo, ebe ụlọ ọrụ Fibreweb nke France mepụtara spunbond polylactic acid, gbazee akwa anaghị kpara akpa, na ihe owuwu mejupụtara ọtụtụ oyibo (DepositaTM). N'ime ha, akwa akwa akwa na-abụghị nke spunbond na-enye nkwado n'ibu, ebe akwa akwa akwa na-agbaze agbaze na akwa akwa akwa spunbond na-ejikọta ọnụ na-enye ihe mgbochi, adsorption, filtration, na mkpuchi mkpuchi.
Domestic Tongji University, Shanghai Tongjieliang Biomaterials Co., Ltd., Hengtian Changjiang Biomaterials Co., Ltd. na ndị ọzọ nkeji nwere ọma mepụtara nonwoven akwa dị ka spun viscose, spunlaced, na-ekpo ọkụ akpọrepu, na-ekpo ọkụ ikuku, wdg na mmepe nke mejupụtara emep uta eri n'ihi na nonwovens na nonwoven ngwaahịa ndị dị otú ahụ dị ọcha na-eji na-adịghị ọcha ngwaahịa, nke na-eji na-adịghị ọcha ngwaahịa. akwa akwa, yana mkpuchi ihu, akpa tii, ihe nzacha ikuku na mmiri na ngwaahịa ndị ọzọ.
A kwalitela ma tinye eriri polylactic acid n'ime ime ụgbọ ala, ngwugwu sịga, na mpaghara ndị ọzọ n'ihi ebe sitere n'okike ya, biodegradability, na enyi gburugburu ebe obibi.
Njirimara nke eriri polylactic acid
Otu n'ime uru a na-enweta nke ọma nke polylactic acid fibers bụ ike ha nwere biodegrade ma ọ bụ banye n'ime ahụ. N'okpuru ọnọdụ composting ọkọlọtọ, a ga-atụrịrị biodegradability, na ngwaahịa mmebi bụ mmiri na carbon dioxide. eriri polylactic acid a na-ahụkarị na-eji nwayọ nwayọ ma ọ bụ ọ siri ike ịchọpụta n'iji ya eme ihe ma ọ bụ ọtụtụ gburugburu eke. Dị ka ihe atụ, ọ bụrụ na e liri ya n'ala eke ruo otu afọ, ọ dịghị eweda ya ala, ma n'okpuru ọnọdụ composting nke okpomọkụ, ọ na-eweda ala ruo ihe dị ka otu izu.
Nbibi na nnabata nke eriri polylactic acid na vivo na-emetụta kristal ha nke ukwuu. Nnwale nbibi nke in vitro egosila na eriri polylactic acid crystallinity dị elu ka na-edobe ọdịdị ha na ihe fọrọ nke nta ka ọ bụrụ 80% ike mgbe afọ 5.3 gasịrị, ma nwee ike were afọ 40-50 ka ọ daa nke ọma.
Ihe ọhụrụ na mgbasawanye nke polylactic acid fibers
Dị ka ụdị eriri kemịkal nke emepụtara ma mepụta ihe karịrị ọkara narị afọ, ojiji e ji polylactic acid eme ihe n'ezie ka na-erughị otu puku kwuru puku nke eriri polyester. Ọ bụ ezie na ọnụ ahịa ego dị na mbụ, a pụghị ileghara arụmọrụ ya anya. Mgbanwe bụ ụzọ iji mepụta eriri polylactic acid.
China bụ onye na-emepụta ihe na ndị na-eji eriri kemịkal eme ihe, na n'afọ ndị na-adịbeghị anya, a na-ebute nchọpụta banyere eriri polylactic acid gbanwere ụzọ. Enwere ike ịgwakọta eriri polylactic acid na “owu, linen na ajị anụ” nke ọdịnala, iji mee igwe a kpara akpa na akwa kpara arụ ọrụ yana arụ ọrụ mgbakwunye, yana yana eriri kemịkal ndị ọzọ dị ka spandex na PTT iji mee akwa, na-egosipụta enyi na enyi anụ ahụ, iku ume, na mmetụta wicking nke mmiri. A kwalitela ha n'ọhịa nke akwa uwe ime.
Ụgwọ nke ụlọ ọrụ Dongguan Liansheng Nonwoven Fabric Co., Ltd., Onye na-emepụta ihe na-emepụta ihe na-adịghị akwa ákwà na akwa akwa, kwesịrị ntụkwasị obi gị!
Oge nzipu: Jun-11-2024