Polylactic asidhi ndeye biodegradable zvinhu uye imwe yeinovimbisa fiber zvinhu muzana remakore rechi21.Polylactic asidhi (PLA)haipo mune zvakasikwa uye inoda artificial synthesis. Iyo mbishi lactic acid inoviriswa kubva muzvirimwa zvakaita segorosi, sugar beet, mufarinya, chibage, uye organic fetereza. Polylactic acid fibers, inozivikanwawo sechibage fibers, inogona kuwanikwa nekuruka.
Kubudirira kwe polylactic acid fibers
Lactic acid inowanikwa mu yogati. Gare gare, masayendisiti akawana kuti asidhi inogadzirwa nekufamba kwetsandanyama mumhuka nevanhu ilactic acid. Kugadzirwa kweDuPont Corporation (muumbi wenaironi) ndiye akatanga kushandisa lactic acid polymers kugadzira polylactic acid polymer zvinhu murabhoritari.
Tsvagiridzo nekuvandudzwa kwepolylactic acid fibers ine nhoroondo yeanopfuura hafu yezana ramakore. Cyanamid, kambani yekuAmerica, yakagadzira polylactic acid inotorwa sutures muma1960s. Muna 1989, Japan's Zhong Fang uye Shimadzu Manufacturing Institute vakabatana kuti vagadzire pure spun polylactic acid fiber (Lacton TM) uye kusanganiswa kwayo nemafuta echisikigo (Corn Fiber TM), iyo yakaratidzwa pa1998 Nagano Winter Games; Unijica Corporation yeJapan yakagadzira polylactic acid filament uye spunbond nonwoven fabric (Terramac TM) muna 2000. Cargill Dow Polymers (CDP) muUnited States (ikozvino NatureWorks) yakabudisa mutsara wezvigadzirwa (Ingeo TM) inovhara polylactic acid resins, fibers, uye mafirimu mu2003 yeTrevirange TM yeTrevirange muGermany 2003, uye reisensi yeTrevirange TM yeGermany. machira ekushandisa muminda yakaita semota, machira epamba, nehutsanana.
Maitiro uye kushandiswa kwepolylactic acid fibers
Parizvino, machira ePLA asiri akarukwa anogadzirwa kubva kune yakakwira optical kuchena L-polylactic asidhi (PLLA) seyakagadzirwa, ichishandisa yakakwira crystallinity uye maitiro ekumisikidza, uye inogadzirirwa kuburikidza neakasiyana kuruka maitiro (kunyunguduka kuruka, kunyorova kuruka, kuruka kwakaoma, kwakaoma kunyorova kuruka, electrostatic kutenderera, nezvimwewo). Pakati pavo, yakanyunguduka yakarukwa polylactic acid fibers (yakareba fibers, mafupi mafiber) inogona kushandiswa muminda yezvipfeko, machira epamba, nezvimwewo. Michina yekugadzira uye nzira yakafanana nepolyester, ine yakanaka spinnability uye ine mwero kuita. Mushure mekugadziriswa kwakakodzera, polylactic asidhi fibers inogona kuwana yepamusoro murazvo retardant (self extinguishing) uye zvakasikwa antibacterial properties. Nekudaro, melt spun PLA fiber ichiri nenzvimbo yekuvandudza musimba remuchina, tembiricha yakakwira dimensional kugadzikana, kusimba uye kuramba kuchembera.
Kuruka kunyorova, kuruka kwakaoma, kuruka kwakaoma kwemvura, uye electrospinning yepolylactic acid fibers (membranes) inonyanya kushandiswa mumunda webiomedical. Zvigadzirwa zvinomiririra zvinosanganisira yakakwira-simba rinotora sutures, vatakuri vezvinodhaka, anti adhesion membranes, ganda rekugadzira, tishu engineering scaffolds, nezvimwe.
Nekuwedzera kuri kudiwa kwemachira asina kuruka anoraswa mune zvekurapa, hutsanana, kusefa, kushongedza nemimwe minda, polylactic acid machira asiri akarukwa avewo imwe yekutsvagisa nekusimudzira hotspots.
Mumakore ekuma1990, Yunivhesiti yeTennessee muUnited States yakatanga kudzidza polylactic acid spunbond uye yakanyungudutsa machira asina kuruka. Zhongfang yekuJapan yakazogadzira polylactic acid spunbond nonwoven machira ekushandisa pakurima, ukuwo kambani yeFibreweb yekuFrance yakagadzira polylactic acid spunbond, yakanyungudutswa machira asina kuruka, uye akawanda-layer composite zvimiro (Deposita TM). Pakati pazvo, spunbond nonwoven fabric layer inonyanya kupa tsigiro yemuchina, ukuwo iyo yakanyungudutswa yakafefeterwa isina woven jira layer uye spunbond nonwoven jira layer zvakabatana zvinopa chipingamupinyi, adsorption, filtration, uye insulation mhedzisiro.
Domestic Tongji University, Shanghai Tongjieliang Biomaterials Co., Ltd., Hengtian Changjiang Biomaterials Co., Ltd. nemamwe mayuniti akabudirira kugadzira machira asina kurukwa senge viscose yakarukwa, yakarukwa, inopisa yakakungurutswa, mhepo inopisa, nezvimwewo mukugadzirwa kweshinda dzakasanganiswa dzezvigadzirwa zvisingazororwe uye zvisingazorohwe, zvinova zvakashandiswa kugadzira zvigadzirwa zvisina kugadzirwa. sanitary napkins uye manapukeni, pamwe nemask kumeso, tii mabhegi, mhepo nemvura kusefa zvinhu uye zvimwe zvigadzirwa.
Polylactic acid fiber yakasimudzirwa zvakanyanya uye kuiswa mukati memotokari mukati, masumbu efodya, nedzimwe nzvimbo nekuda kwechisikigo kwacho, biodegradability, uye hushamwari kwezvakatipoteredza.
Maitiro e polylactic acid fibers
Imwe yemabhenefiti anonyanya kuzivikanwa epolylactic acid fibers kugona kwavo kuita biodegrade kana kunyudza mumuviri. Pasi pemamiriro akajairwa ecompost, biodegradability inofanirwa kuyerwa, uye zvigadzirwa zvekusvibisa imvura uye kabhoni dhaidhi. Yakajairwa polylactic asidhi faibha hydrolyze zvishoma nezvishoma kana kutonetsa kuona mukushandiswa kwakajairwa kana kwakawanda kwakasikwa nharaunda. Semuenzaniso, kana yakavigwa muvhu rechisikigo kwegore, haina kuderera, asi pasi peyakajairika tembiricha composting mamiriro, inoderedza kweinenge vhiki.
Kuora uye kutorwa kwepolylactic acid fibers mu vivo kunokanganisa zvakanyanya nekujeka kwavo. Simulation in vitro degradation experiments yakaratidza kuti high crystallinity polylactic acid fibers ichiri kuchengetedza chimiro chavo uye inoda kusvika 80% simba mushure memakore 5.3, uye inogona kutora makore 40-50 kuti iparadze zvizere.
Innovation uye kuwedzera kwe polylactic acid fibers
Sekemikari fiber yakasiyana-siyana yakagadziridzwa uye yakagadzirwa kweanopfuura hafu yezana remakore, iyo chaiyo yekushandiswa kwepolylactic acid fiber ichiri pasi pechiuru chimwe che polyester fiber. Kunyange zvazvo mutengo unotanga, kushanda kwayo hakugoni kuregererwa. Kushandura inzira yekugadzira polylactic acid fibers.
China inogadzira uye mutengi wemakemikari fibers, uye mumakore achangopfuura, tsvakiridzo yeakagadziridzwa polylactic acid fibers yakapihwa pamberi. Polylactic acid fibers inogona kusanganiswa neyechinyakare "donje, yerineni, uye makushe" echinyakare kugadzira muchina wakarukwa uye akarukwa machira ane anopindirana kuita, pamwe nemamwe makemikari fibers senge spandex nePTT kugadzira machira, anoratidza ganda hushamwari, kufema, uye mwando wicking mhedzisiro. Vakasimudzirwa mumunda wemachira ezvipfeko zvemukati.
Dongguan Liansheng Nonwoven Fabric Co., Ltd., mugadziri wemicheka isina mucheka uye micheka isina kugadzirwa, akakodzera kuvimba kwako!
Nguva yekutumira: Jun-11-2024