Luthini umqondo onobushushu obuphezulu wezinto zePI?

I-PI (i-polyoimide) yimpahla ye-pollilomide enozinzo olugqibeleleyo, ukufakelwa kombane, ukuxhathisa imichiza kunye namandla omatshini. Ngenxa yezi ndawo, izixhobo ze-PI zisetyenziswa ngokubanzi kwi-aerospace, ulwazi lwe-elektroniki, i-biomedical kunye namanye amasimi.

Yintoni kanye kanye le qondo lobushushu eliphakamileyo lezixhobo ze-PI? Ngapha koko, ukuchasana nobushushu obuphezulu kwezixhobo ze-PI kunxulumene ngokusondeleyo nesakhiwo sabo semolekyuli kunye nendlela ye-synthesi. Ngokubanzi, izixhobo ze-PI eziqhelekileyo zinokusetyenziswa ixesha elide malunga ne-250 ℃, ngelixa ezinye izinto ezintsha ze-PI nonyango olukhethekileyo okanye i-syntheshes zinokudlula kwi-300 ℃ malunga nokunganyangeki kobushushu obuphezulu. Ukusebenza kweqondo lobushushu obuphezulu kwenza ukuba izixhobo ze-PPI zilungisa ukusebenza ngokuzinzileyo kwiindawo ezininzi ezixineneyo.

Kutheni le nto izixhobo ze-PI zinokusebenza kakuhle? Oku ikakhulu kungenxa ye-aromatic kunye namakhonkco aphezulu kwimo yayo yeemolekyuli. Ezi ntlobo zesandi zivumela izixhobo ze-PI ukugcina iipropathi ezizinzileyo kunye nezixhobo zobushushu obuphakathi kwaye zincinci zinokubola okanye zichaphazele. Ukongeza, kukho nokunxibelelana okuqinileyo phakathi kwemixokelelwane yePolymer kwizixhobo ze-PI, eyenza ukuba i-PI ye-PI ye-PI ukuze igcine izinto ezilungileyo nezinombane kubushushu obuphezulu.

Nangona ukuchasana nobushushu obuphezulu kwezixhobo ze-PI kulungile, ezinye izinto kufuneka ziqwalaselwe kwizicelo ezenziwayo. Umzekelo, uzinzo lwexesha elide kwizixhobo ze-PI kumaqondo obushushu aphezulu anokuchaphazeleka kwizinto ezizeleyo ezifana neoksijini, umphunga wamanzi, kunye ne-ultraviolet. Ke ngoko, xa usebenzisa izixhobo ze-PI, kuyayimfuneko nokuqwalaselwa ngokutsha ngokwendalo ethile kunye neemeko, kwaye ukhethe izixhobo ezifanelekileyo kunye neendlela zokulungiselela.

Ukwenzela ukuqhubela phambili ukuchasana nobushushu obuphezulu kwezixhobo ze-PI, abaphandi bakwahlolisisa iindlela zeNovels Synthesi kunye neendlela zokulungiswa. Umzekelo, uzinzo lwe-shirm, iipropathi zoomatshini kunye neepropathi zokulungisa izixhobo ezinokuphuculwa ngokwazisa iimodyuli ezintsha okanye iifilitha. Okwangoku, izixhobo ezintsha ze-PI ezinepropathi egqwesileyo zinokulungiswa ngokusebenzisa ubuchwephesha bokulungiselela abaphambili, njengokusetyenziswa kweekhemikhali zemichiza kunye nendlela ye-sol-gel-indlela.

Ngokubanzi, ukuxhathisa kobushushu obuphezulu kwezixhobo ze-PI kulungile, kwaye bayakwazi ukugcina ukusebenza ngokuzinzileyo kumaqondo obushushu aphezulu. Oku kwenza ukuba izixhobo ze-PI zinoluhlu olubanzi lweemeko zesicelo kwiindawo ezininzi. Kwixa elizayo, kunye nenkqubela phambili eqhubekayo yetekhnoloji kunye neemfuno zesicelo, ndiyakholelwa ukuba ukusebenza kwezixhobo ze-PI kuya kuphuculwa ngakumbi kwaye zigqibelele.

Ukongeza, kufanelekile ukukhankanya ukuba ukumelana nobushushu obuphezulu kwezixhobo ze-PI ayisiyiyo kuphela inzuzo. Ngapha koko, izixhobo ze-PI nazo zinezinye izinto ezininzi ezilungileyo. Umzekelo, ukufundiswa kombane kwezixhobo ezilungileyo kakhulu, kwaye kunokusetyenziswa njengento yokuthambisa kwi-voltage ephezulu, indawo eneqondo lobushushu eliphezulu; Kwangelo xesha, ukuxhathisa i-Abrashion, ukubuyisa ilangatye, ukumelana nokucoca kunye neminye imiba ye-PI ayibalasele. Ezi zibonelelo zenza izinto ze-PI zinendima engenakufikelelwa kumasimi amaninzi.

Nangona kunjalo, ngaphandle kwezibonelelo zabo ezininzi, izinto ezinzima ze-PI zisafuna ukunikela ingqalelo kwiintsilelo zabo kunye nokusikelwa umda kwizicelo ezenziwe. Umzekelo, ukulungiswa kunye nokubumba kwezinto ze-PI kunzima ngakumbi, kucela ubushushu obuphakamileyo kunye noxinzelelo; Kwangelo xesha, iindleko zezinto ze-PI ikwinqanaba eliphezulu, elikwadanisa ukusetyenziswa kwayo kwiindawo ezithile zokuphela. Ke ngoko, kuyimfuneko ukuba ukhethe kwaye ubavavanye ngokweemfuno kunye neemeko ezithile kwisicelo.