T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 10 – Arkady Leokum<\/p>\n\n\n\n
Keo si\u00eau d\u00ednh \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n ra n\u0103m 1942 b\u1edfi ti\u1ebfn s\u0129 Harry Coover c\u1ee7a c\u00f4ng ty Eastman Kodak trong qu\u00e1 tr\u00ecnh nghi\u00ean c\u1ee9u c\u00e1c v\u1eadt li\u1ec7u ph\u00f9 h\u1ee3p \u0111\u1ec3 ch\u1ebf t\u1ea1o c\u00e1c th\u00e0nh ph\u1ea7n trong su\u1ed1t. Trong khi t\u00ecm ki\u1ebfm m\u1ed9t lo\u1ea1i v\u1eadt li\u1ec7u th\u00edch h\u1ee3p \u0111\u1ec3 ch\u1ebf k\u00ednh ng\u1eafm platic cho s\u00fang, \u00f4ng t\u00ecm hi\u1ec3u t\u00ednh ch\u1ea5t c\u1ee7a h\u1ee3p ch\u1ea5t metyl cyanoacrylate v\u00e0 nh\u1eadn th\u1ea5y ch\u00fang c\u00f3 m\u1ed9t \u0111\u1eb7c t\u00ednh k\u00ec l\u1ea1 l\u00e0 d\u00ednh ch\u1eb7t v\u00e0o b\u1ea5t k\u00ec v\u1eadt g\u00ec m\u00e0 ch\u00fang ti\u1ebfp x\u00fac. Ti\u1ebfn s\u0129 t\u00ecnh c\u1edd g\u1eb7p l\u1ea1i ch\u1ea5t metyl cyanoacrylate v\u00e0o ch\u00edn n\u0103m sau trong khi gi\u00e1m s\u00e1t m\u1ed9t nh\u00f3m ng\u01b0\u1eddi l\u00e0m vi\u1ec7c tr\u00ean c\u00e1c t\u1ea5m plastic ch\u1ecbu nhi\u1ec7t d\u00f9ng l\u00e0m v\u00f2m che bu\u1ed3n l\u00e1i m\u00e1y bay chi\u1ebfn \u0111\u1ea5u. M\u1ed9t l\u1ea7n n\u1eefa, ch\u1ea5t n\u00e0y th\u1ec3 hi\u1ec7n m\u1ed9t kh\u1ea3 n\u0103ng d\u00ednh \u0111\u1ebfn kh\u00f3 ch\u1ecbu nh\u01b0ng l\u1ea7n n\u00e0y n\u00f3 khi\u1ebfn \u00f4ng \u0111\u1ec3 \u00fd v\u00e0 \u0111\u00e3 ph\u00e1t hi\u1ec7n ra m\u1ed9t d\u1ea1ng b\u00e1m d\u00ednh m\u1edbi, kh\u00f4ng c\u1ea7n \u00e1p su\u1ea5t hay nhi\u1ec7t \u0111\u1ed9 \u0111\u1ec3 d\u00e1n d\u00ednh c\u00e1c v\u1eadt v\u00e0o v\u1edbi nhau. \u0110i\u1ec1u tuy\u1ec7t v\u1eddi l\u00e0 qu\u00e1 tr\u00ecnh d\u00e1n s\u1ebd x\u1ea3y ra ngay khi ch\u1ec9 c\u00f3 s\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a m\u1ed9t l\u01b0\u1ee3ng r\u1ea5t nh\u1ecf n\u01b0\u1edbc – nh\u01b0 l\u1edbp h\u01a1i n\u01b0\u1edbc c\u00f3 trong kh\u00f4ng kh\u00ed (do \u0111\u1ed9 \u1ea9m t\u1ef1 nhi\u00ean c\u1ee7a kh\u00f4ng kh\u00ed) bao ph\u1ee7 m\u1ecdi v\u1eadt ch\u1eb3ng h\u1ea1n. Kodak \u0111\u00e3 ch\u1ebf t\u1ea1o th\u00e0nh s\u1ea3n ph\u1ea7m v\u00e0 l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u01b0a ra th\u1ecb tr\u01b0\u1eddng v\u00e0o n\u0103m 1958.<\/p>\n\n\n\n
Keo si\u00eau d\u00ednh c\u00f3 kh\u1ea3 n\u0103ng t\u1ef1 chuy\u1ec3n \u0111\u1ed5i t\u1eeb c\u1ea5u tr\u00fac l\u00e0 m\u1ed9t t\u1eadp h\u1ee3p c\u1ee7a nhi\u1ec1u ph\u00e2n t\u1eed ri\u00eang bi\u1ec7t th\u00e0nh m\u1ed9t chu\u1ed7i ph\u00e2n t\u1eed c\u00f3 \u0111\u1ed9 li\u00ean k\u1ebft cao, kh\u00f3 ph\u00e1 v\u1ee1. C\u00e1c electron trong nh\u1eefng ph\u00e2n t\u1eed n\u01b0\u1edbc t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn m\u1ed1i li\u00ean k\u1ebft gi\u1eefa hai nguy\u00ean t\u1eed carbon trong ph\u00e2n t\u1eed cyanoacrylate, bi\u1ebfn n\u00f3 th\u00e0nh m\u1ed9t c\u00e1i m\u00f3c c\u00f3 hai \u0111\u1ea7u c\u00f3 th\u1ec3 g\u1eafn v\u1edbi nh\u1eefng ph\u00e2n t\u1eed keo kh\u00e1c. Nh\u1eefng li\u00ean k\u1ebft n\u00e0y ng\u01b0\u1ee3c l\u1ea1i s\u1ebd cho electron cho c\u00e1c ph\u00e2n t\u1eed kh\u00e1c, k\u00edch ho\u1ea1t s\u1ef1 h\u00ecnh th\u00e0nh c\u1ee7a m\u1ed9t chu\u1ed7i ph\u00e2n t\u1eed, chu\u1ed7i ph\u00e2n t\u1eed n\u00e0y n\u1ed1i c\u00e1c ph\u00e2n t\u1eed v\u1edbi nhau b\u1eb1ng m\u1ed9t l\u1ef1c r\u1ea5t l\u1edbn. Qu\u00e1 tr\u00ecnh n\u00e0y di\u1ec5n ra v\u00f4 c\u00f9ng nhanh v\u00e0 d\u1ec5 d\u00e0ng khi c\u00f3 s\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a n\u01b0\u1edbc \u0111\u1ebfn n\u1ed7i c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t keo si\u00eau d\u00ednh ph\u1ea3i tr\u1ed9n n\u00f3 v\u1edbi m\u1ed9t l\u01b0\u1ee3ng nh\u1ecf acid, \u0111\u1ec3 c\u00f3 th\u1ec3 l\u00e0m ng\u1eebng c\u00e1c qu\u00e1 tr\u00ecnh ph\u1ea3n \u1ee9ng m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng. Ch\u1ec9 c\u1ea7n m\u1ed9t ch\u00fat h\u01a1i n\u01b0\u1edbc, ngay c\u1ea3 h\u01a1i n\u01b0\u1edbc d\u00ednh tr\u00ean \u0111\u1ea7u ng\u00f3n tay c\u0169ng \u0111\u1ee7 \u0111\u1ec3 ph\u00e1 ho\u1ea1i ch\u1ea5t \u1ed5n \u0111\u1ecbnh acid v\u00e0 ph\u1ea3n \u1ee9ng h\u00ecnh th\u00e0nh chu\u1ed7i b\u1eaft \u0111\u1ea7u x\u1ea3y ra m\u1ed9t c\u00e1ch d\u1eef d\u1ed9i.<\/p>\n\n\n\n
Ti\u1ebfn s\u0129 Coover l\u00e0 ng\u01b0\u1eddi d\u1eabn \u0111\u1ea7u trong vi\u1ec7c c\u1ea5p b\u1eb1ng s\u00e1ng ch\u1ebf c\u1ee7a vi\u1ec7c s\u1eed d\u1ee5ng keo si\u00eau d\u00ednh trong gi\u1ea3i ph\u1eabu, d\u00e1n c\u00e1c c\u01a1 v\u1edbi nhau m\u00e0 kh\u00f4ng c\u1ea7n may l\u1ea1i. Keo si\u00eau d\u00ednh \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u1ea7n \u0111\u1ea7u ti\u00ean trong gi\u1ea3i ph\u1eabu trong chi\u1ebfn tranh \u1edf Vi\u1ec7t Nam v\u00e0 ng\u00e0y nay th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong ti\u1ec3u ph\u1eabu.<\/p>\n","protected":false},"excerpt":{"rendered":"
T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 10 – Arkady Leokum Keo si\u00eau d\u00ednh \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n ra n\u0103m 1942 b\u1edfi ti\u1ebfn s\u0129 Harry Coover c\u1ee7a c\u00f4ng ty Eastman Kodak trong qu\u00e1 tr\u00ecnh nghi\u00ean c\u1ee9u c\u00e1c v\u1eadt li\u1ec7u ph\u00f9 h\u1ee3p \u0111\u1ec3 ch\u1ebf t\u1ea1o c\u00e1c th\u00e0nh ph\u1ea7n trong su\u1ed1t. Trong khi […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15],"tags":[],"class_list":["post-15929","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/15929","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=15929"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/15929\/revisions"}],"predecessor-version":[{"id":15930,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/15929\/revisions\/15930"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=15929"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=15929"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=15929"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}