Iyo biodegradable PCB ine hushamwari zvakaringana here?

PCB chikamu chakakosha chechero chigadzirwa chemagetsi. Nekuwedzera kwekushandiswa kwemagetsi emagetsi mumativi ose ehupenyu hwedu uye nekuda kwehupenyu hwavo hupfupi, chinhu chimwe ndechekuwedzera kwehuwandu hwe-e-waste. Nekuvandudzwa kwemaindasitiri ari kusimukira akadai seInternet Yezvinhu uye nekusimudzira kwakasimba kwehunyanzvi hwekubatsira vatyairi muchikamu chemotokari, kukura uku kunongowedzera.

ipcb

Nei PCB marara iri dambudziko chairo?

Kunyangwe madhizaini ePCB achigona kushandiswa kwemakore mazhinji, chokwadi ndechekuti maturusi madiki aya anotongwa nePCB ari kutsiviwa pamwero unotyisa. Nokudaro, nyaya inokosha inomuka idambudziko rekuparara, rinotungamirira kumatambudziko akawanda ezvakatipoteredza. Kunyanya munyika dzakabudirira, nekuti huwandu hukuru hwezvigadzirwa zvemagetsi zvakaraswa zvinotakurwa kuenda kunoraswa, zvinoburitsa zvinhu zvine muchetura munzvimbo, senge:

Mercury-inogona kukonzera itsvo uye kukuvara kwehuropi.

Cadmium-inozivikanwa kukonzera cancer.

Lead-inozivikanwa kukonzera kukuvara kwehuropi

Brominated flame retardants (BFR) -inozivikanwa kukanganisa basa rehomoni revakadzi.

Beryllium-inozivikanwa kukonzera cancer

Kunyangwe bhodhi rikadzokororwa uye richishandiswa zvakare pachinzvimbo chekurikanda mugomba remarara, maitiro ekudzokorodza ane njodzi uye anogona kukonzera njodzi dzehutano. Rimwe dambudziko nderekuti sezvo midziyo yedu inova diki uye ichireruka, ibasa rakaoma kuti uzviparadzanise kuti udzokorore zvikamu zvinogadziriswazve. Usati wabvisa chero zvinhu zvinogona kudzokororwa, maglue ese uye zvinonamira zvinoshandiswa zvinoda kubviswa nemaoko. Nokudaro, nzira yacho yakaoma zvikuru. Kazhinji, izvi zvinoreva kutumira mabhodhi ePCB kunyika dzisina kusimukira dzine mutengo wakaderera wevashandi. Mhinduro kumibvunzo iyi (midziyo yemagetsi yakaturikidzwa mumarara kana kuti inodzokororwa) zviri pachena kuti PCB inoodza, inogona kuderedza zvakanyanya marara e-e.

Kutsinhanisa zvinhu zvino chepfu nesimbi dzenguva pfupi (senge tungsten kana zingi) inhanho huru munzira iyi. Chikwata chemasayendisiti paFrederick Seitz Materials Research Laboratory paYunivhesiti yeI Illinois kuUrbana-Champaign yakaronga kugadzira PCB inoshanda zvakakwana inoora kana yaiswa mumvura. Iyo PCB inogadzirwa nezvinhu zvinotevera:

Commerce off-the-sherufu zvikamu

Magnesium paste

Tungsten Paste

Sodium Carboxymethyl Cellulose (Na-CMC) Substrate

Polyethylene oxide (PEO) bonding layer

Muchokwadi, maPCB akazara biodegradable akagadzirwa achishandisa biocomposites akagadzirwa echisikigo cellulose fiber akatorwa kubva mumabhanana madzinde uye gorosi gluten. Iyo biocomposite zvinhu haina makemikari zvinhu. Aya ma-biodegradable transient PCB ane zvimiro zvakafanana kune akajairwa maPCB. Mamwe maPCB anoora akagadzirwa zvakare pachishandiswa minhenga yehuku uye magirazi fiber.

Mabiopolymers akadai semakabhohaidhiretsi uye mapuroteni anogona kugadzirwa, asi zviwanikwa zvavanoda (zvakadai sevhu nemvura) zviri kushomeka. Mabiopolymers anovandudzwa uye anoenderera mberi anogona kuwanikwa kubva kumarara ekurima (senge faibha yebhanana), iyo inotorwa kubva mumiti yemiti. Izvi zvigadzirwa zvekurima zvinogona kushandiswa kugadzira zvizere biodegradable composite zvinhu.

Ko bhodhi rekuchengetedza zvakatipoteredza rakavimbika here?

Kazhinji, izwi rokuti “kuchengetedzwa kwezvakatipoteredza” rinoyeuchidza vanhu nezvemufananidzo wezvigadzirwa zvisina kusimba, izvo zvisiri izvo zvatinoda kushamwaridzana nePCBs. Zvimwe zvezvatinetsekera maererano negirinhi PCB mabhodhi anosanganisira:

Mechanical properties-Icho chokwadi chokuti mabhodhi ane hushamwari kwezvakatipoteredza anogadzirwa nebhanana fiber inoita kuti tifunge kuti mapuranga anogona kunge asina kusimba semashizha. Asi chokwadi ndechekuti vaongorori vari kubatanidza substrate zvinhu kugadzira mapuranga anofananidzwa nesimba kune akajairwa mapuranga.

Thermal performance-PCB inoda kuve yakanakisa mukushanda kwekupisa uye kwete nyore kubata moto. Zvinozivikanwa kuti zvipenyu zvipenyu zvine yakaderera tembiricha chikumbaridzo, saka neimwe nzira, kutya uku kwakanyatsodzika. Nekudaro, yakaderera tembiricha solder inogona kubatsira kudzivirira dambudziko iri.

Dielectric constant-Iyi inzvimbo iyo kuita kweiyo biodegradable board kwakafanana neiyo yechinyakare board. Iyo dielectric constants inowanikwa neaya mahwendefa zvakanaka mukati memhando inodiwa.

Kuita pasi pemamiriro ezvinhu akanyanya-Kana iyo PCB yebiocomposite zvinhu yakaratidzwa kune yakakwira humidity kana tembiricha yakakwira, kutsauka kwekubuda hakuzoonekwe.

Heat dissipation-biocomposite zvinhu zvinogona kupenya kupisa kwakawanda, iyo inodiwa hunhu hwePCBs.

Sezvo kushandiswa kwezvigadzirwa zvemagetsi kunowedzera uye kupararira, tsvina yemagetsi icharamba ichikura kusvika pamwero unotyisa. Zvisinei, mashoko akanaka ndeokuti pamwe nekuvandudzwa kwekutsvakurudza pamusoro pezvisarudzo zvekuchengetedza zvakatipoteredza, mabhodhi akasvibirira achava chokwadi chekutengeserana, nokudaro kuderedza e-marara uye e-recycling nyaya. Tichiri kurwisana ne-e-waste yakapfuura uye midziyo yemagetsi yazvino, inguva yokuti isu titarise kune ramangwana uye tive nechokwadi chekushandiswa kwakapararira kwebiodegradable PCBs.