Bosoeu, bo khanyang, bo bonolo, bo hloekileng, bo tšoantšetsang bohloeki.
Batho ba bangata ba rata lintho tse tšoeu, 'me thepa ea bareki hangata e etsoa ka bosoeu.Hangata, batho ba rekang lintho tse tšoeu kapa ba apereng liaparo tse tšoeu ba tla ba hlokolosi hore ba se ke ba lumella bosoeu hore bo fumane litšila.Empa ho na le pina e reng, “Bokahohleng bona ba hona joale, hana ka ho sa feleng.”Ho sa tsotellehe hore na u etsa boiteko bo bokae ho boloka lintho tsena hore li se ke tsa silafala, butle-butle li tla fetoha mosehla ka botsona.Ka beke, selemo, kapa lilemo tse tharo, u roala mokotla oa li-headphone ha u ea mosebetsing letsatsi le leng le le leng, 'me hempe e tšoeu eo u sa e aparang ka har'a wardrobe e fetoha mosehla u le mong.
Ha e le hantle, ho ba mosehla ha likhoele tsa liaparo, lithapo tsa lieta tse rekerehang, le mabokose a li-headphone a polasetiki ke pontšo ea botsofali ba polymer, bo tsejoang e le yellowing.Yellowing e bolela ketsahalo ea ho senyeha, ho hlophisa bocha, kapa ho kopanya limolek'hule tsa lihlahisoa tsa polymer nakong ea ts'ebeliso, e bakoang ke mocheso, mahlaseli a khanyang, oxidation le lintlha tse ling, e leng se etsang hore ho thehoe lihlopha tse ling tse mebala-bala.
Lihlopha tsena tsa mebala hangata ke carbon carbon double bonds (C=C), lihlopha tsa carbonyl (C=O), lihlopha tsa imine (C=N), joalo-joalo.Ha palo ea li-conjugated carbon carbon bonds li fihla ho 7-8, hangata li bonahala li le mosehla.Hangata, ha u hlokomela hore lihlahisoa tsa polymer li qala ho fetoha mosehla, tekanyo ea mosehla e atisa ho eketseha.Lebaka ke hore ho senyeha ha li-polymers ke karabelo ea ketane, 'me hang ha ts'ebetso ea ho senyeha e qala, ho senyeha ha liketane tsa molek'hule ho tšoana le domino,' me karolo ka 'ngoe e oa ka bonngoe.
Ho na le mekhoa e mengata ea ho boloka thepa e tšoeu.Ho kenyelletsa titanium dioxide le li-fluorescent whitening agents li ka ntlafatsa phello ea bosoeu ea thepa ka katleho, empa e ke ke ea thibela thepa hore e se be mosehla.Ho fokotsa ho fokotseha ha li-polymers, li-stabilizers tse khanyang, li-absorber tse khanyang, li-absorbers, joalo-joalo li ka kenyelletsoa.Mefuta ena ea li-additives e ka monya matla a tsamaisoang ke leseli la ultraviolet khanyeng ea letsatsi, ho khutlisetsa polymer boemong bo tsitsitseng.'Me li-anti-thermal oxidants li ka tšoara li-radicals tsa mahala tse hlahisoang ke oxidation, kapa tsa thibela ho senyeha ha liketane tsa polymer ho felisa karabelo ea ketane ea ho senyeha ha polymer.Lisebelisoa li na le nako ea bophelo, 'me li-additives li na le nako ea bophelo.Leha li-additives li ka fokotsa sekhahla sa polymer yellowing, empa butle-butle li tla hloleha nakong ea ts'ebeliso.
Ntle le ho eketsa li-additives, hoa khoneha ho thibela polymer yellowing ho tsoa likarolong tse ling.Ka mohlala, ho fokotsa tšebeliso ea thepa mocheso o phahameng le libaka tse khanyang tsa ka ntle, ho hlokahala hore u sebelise lesela le monyang leseli ho lisebelisoa ha u li sebelisa ka ntle.Yellowing ha e ame feela ponahalo, empa hape e sebetsa e le pontšo ea ho senyeha ha ts'ebetso ea mochine kapa ho hlōleha!Ha thepa ea ho haha e e-ba mosehla, lisebelisoa tse ncha li lokela ho nkeloa sebaka kapele kamoo ho ka khonehang.
Nako ea poso: Dec-20-2023