Polytetrafloetylen l\u00e0 “k\u1ebb sinh sau” trong th\u1ebf gi\u1edbi c\u00e1c ch\u1ea5t d\u1ebbo. H\u1ee3p ch\u1ea5t n\u00e0y \u0111\u01b0\u1ee3c ch\u00ednh th\u1ee9c s\u1ea3n xu\u1ea5t ch\u1ec9 m\u1edbi kho\u1ea3ng 30 n\u0103m tr\u01b0\u1edbc \u0111\u00e2y. Th\u1ebf nh\u01b0ng h\u1ee3p ch\u1ea5t \u0111\u00e3 nhanh ch\u00f3ng \u0111\u01b0\u1ee3c t\u00f4n l\u00e0 “vua ch\u1ea5t d\u1ebbo”. V\u00ec sao v\u1eady?<\/p>\n\n\n\n
Polytetrafloetylen c\u00f3 nhi\u1ec1u t\u00ednh ch\u1ea5t \u01b0u vi\u1ec7t m\u00e0 c\u00e1c lo\u1ea1i ch\u1ea5t d\u1ebbo kh\u00e1c kh\u00f4ng c\u00f3: H\u1ee3p ch\u1ea5t kh\u00f4ng b\u1ecb gi\u00f2n trong kh\u00f4ng kh\u00ed l\u1ecfng. Kh\u00f4ng b\u1ecb m\u1ec1m \u0111i trong n\u01b0\u1edbc \u0111un s\u00f4i. T\u1eeb nhi\u1ec7t \u0111\u1ed9 th\u1ea5p -269,3\u00b0C ch\u1ec9 l\u1edbn h\u01a1n nhi\u1ec7t \u0111\u1ed9 0 K (nhi\u1ec7t \u0111\u1ed9 tuy\u1ec7t \u0111\u1ed1i) 4\u00b0C cho \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 cao 250\u00b0C kh\u00f4ng h\u1ec1 c\u00f3 s\u1ef1 thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i. Polytetrafloetylen r\u1ea5t b\u1ec1n v\u1edbi c\u00e1c t\u00e1c nh\u00e2n g\u00e2y \u0103n m\u00f2n, cho d\u00f9 \u0111\u00f3 l\u00e0 c\u00e1c axit, dung d\u1ecbch ki\u1ec1m \u0111\u1eadm \u0111\u1eb7c c\u0169ng nh\u01b0 c\u00e1c t\u00e1c nh\u00e2n oxy ho\u00e1 m\u1ea1nh c\u0169ng kh\u00f4ng g\u00e2y \u0111\u01b0\u1ee3c t\u00e1c d\u1ee5ng g\u00ec. T\u00ednh b\u1ec1n ho\u00e1 h\u1ecdc c\u1ee7a polytetrafloetylen v\u01b0\u1ee3t qua th\u1ee7y tinh g\u1ed1m, th\u00e9p kh\u00f4ng g\u1ec9, v\u00e0ng, b\u1ea1ch kim. B\u1edfi v\u00ec thu\u1ef7 tinh, th\u00e9p kh\u00f4ng g\u1ec9, v\u00e0ng, b\u1ea1ch kim \u0111\u1ec1u ho\u00e0 tan trong c\u01b0\u1eddng th\u1ee7y \u0111un s\u00f4i, c\u00f2n polytetrafloetylen c\u00f3 \u0111un s\u00f4i trong c\u01b0\u1eddng th\u1ee7y h\u00e0ng ch\u1ee5c gi\u1edd \u0111\u1ed3ng h\u1ed3 c\u0169ng tr\u01a1 nguy\u00ean. Polytetrafloetylen kh\u00f4ng b\u1ecb ng\u1ea5m n\u01b0\u1edbc, kh\u00f4ng b\u1ecb tr\u01b0\u01a1ng trong n\u01b0\u1edbc. Ngo\u00e0i ra polytetrafloetylen l\u00e0 ch\u1ea5t c\u00e1ch \u0111i\u1ec7n t\u1ed1t, kh\u00f4ng ch\u1ecbu \u1ea3nh h\u01b0\u1edfng c\u1ee7a \u0111i\u1ec7n t\u1eeb tr\u01b0\u1eddng, kh\u00f4ng c\u00f3 b\u1ea5t k\u1ef3 s\u1ef1 thay \u0111\u1ed5i n\u00e0o theo nhi\u1ec7t \u0111\u1ed9.<\/p>\n\n\n\n
Do polytetrafloetylen c\u00f3 nh\u1eefng t\u00ednh n\u0103ng qu\u00fd gi\u00e1 nh\u01b0 v\u1eady n\u00ean \u0111\u01b0\u1ee3c ng\u01b0\u1eddi ta r\u1ea5t coi tr\u1ecdng. Polytetrafloetylen \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p: C\u00f4ng nghi\u1ec7p \u0111\u00f4ng l\u1ea1nh, c\u00f4ng nghi\u1ec7p ho\u00e1 h\u1ecdc, c\u00f4ng nghi\u1ec7p \u0111i\u1ec7n, c\u00f4ng nghi\u1ec7p th\u1ef1c ph\u1ea9m, c\u00f4ng nghi\u1ec7p y d\u01b0\u1ee3c\u2026<\/p>\n\n\n\n
Ng\u01b0\u1eddi ta d\u00f9ng polytetrafloetylen trong vi\u1ec7c ch\u1ebf t\u1ea1o thi\u1ebft b\u1ecb nhi\u1ec7t \u0111\u1ed9 th\u1ea5p \u0111\u1ec3 s\u1ea3n xu\u1ea5t c\u00e1c b\u00ecnh \u0111\u1ef1ng kh\u00f4ng kh\u00ed l\u1ecfng. Trong c\u00f4ng nghi\u1ec7p ho\u00e1 h\u1ecdc, ng\u01b0\u1eddi ta d\u00f9ng polytetrafloetylen \u0111\u1ec3 ch\u1ebf t\u1ea1o c\u00e1c b\u00ecnh ph\u1ea3n \u1ee9ng ch\u1ecbu \u0103n m\u00f2n, ch\u1ebf t\u1ea1o v\u1ecf b\u00ecnh \u0103cquy, l\u00e0m t\u1ea5m l\u1ecdc. Trong c\u00f4ng nghi\u1ec7p \u0111i\u1ec7n, ng\u01b0\u1eddi ta d\u00f9ng polytetrafloetylen l\u00e0m c\u00e1c l\u1edbp v\u1ecf c\u00e1ch \u0111i\u1ec7n r\u1ea5t m\u1ecfng, v\u1edbi l\u1edbp ch\u1ea5t c\u00e1ch \u0111i\u1ec7n n\u00e0y ch\u1ec9 c\u1ea7n \u0111\u1ed9 d\u00e0y 15 micromet l\u00e0 \u0111\u00e3 c\u00f3 kh\u1ea3 n\u0103ng c\u00e1ch \u0111i\u1ec7n tuy\u1ec7t h\u1ea3o. Trong c\u00f4ng nghi\u1ec7p y d\u01b0\u1ee3c, ng\u01b0\u1eddi ta d\u00f9ng polytetrafloetylen ch\u1ebf t\u1ea1o x\u01b0\u01a1ng nh\u00e2n t\u1ea1o, l\u00e0m v\u1eadt li\u1ec7u t\u1ea1o s\u1ee5n l\u00e0 v\u1eadt li\u1ec7u cho ngo\u1ea1i khoa, v\u00ec \u0111\u00e2y l\u00e0 v\u1eadt li\u1ec7u v\u00f4 h\u1ea1i \u0111\u1ed1i v\u1edbi c\u01a1 th\u1ec3 con ng\u01b0\u1eddi. Ngo\u00e0i ra polytetrafloetylen c\u00f2n d\u00f9ng \u0111\u1ec3 ch\u1ebf t\u1ea1o ra\u0111a, v\u1eadt li\u1ec7u th\u00f4ng tin cao t\u1ea7n, thi\u1ebft b\u1ecb s\u00f3ng ng\u1eafn.<\/p>\n\n\n\n
Polytetrafloetylen l\u00e0 ch\u1ea5t c\u00f3 m\u00e0u tr\u1eafng x\u00e1m, l\u00e0 h\u1ee3p ch\u1ea5t cao ph\u00e2n t\u1eed k\u1ebft tinh n\u1eeda trong su\u1ed1t, l\u00e0 s\u1ea3n ph\u1ea9m tr\u00f9ng h\u1ee3p t\u1eeb tetrafloetylen. Nguy\u00ean li\u1ec7u c\u01a1 b\u1ea3n \u0111\u1ec3 s\u1ea3n xu\u1ea5t h\u1ee3p ch\u1ea5t tetrafloetylen l\u00e0 trifloetan v\u00e0 hy\u0111roforua. C\u00e1c ch\u1ea5t d\u1ebbo th\u00f4ng th\u01b0\u1eddng do c\u00e1c nguy\u00ean t\u1eed cacbon, hy\u0111ro v\u00e0 nhi\u1ec1u nguy\u00ean t\u1eed kh\u00e1c t\u1ea1o n\u00ean, trong polytetrafloetylen kh\u00f4ng c\u00f3 nguy\u00ean t\u1eed hy\u0111ro m\u00e0 ch\u1ec9 c\u00f3 c\u00e1c nguy\u00ean t\u1eed flo v\u00e0 cacbon. Ch\u00ednh nguy\u00ean t\u1eed flo trong ph\u00e2n t\u1eed \u0111\u00e3 thay th\u1ebf nguy\u00ean t\u1eed hy\u0111ro l\u00e0m cho li\u00ean k\u1ebft gi\u1eefa c\u00e1c nguy\u00ean t\u1eed cacbon trong ph\u00e2n t\u1eed c\u00e0ng \u0111\u1eb7c kh\u00edt, b\u1ec1n ch\u1eb7t h\u01a1n, do \u0111\u00f3 m\u00e0 ch\u1ea5t d\u1ebbo polytetrafloetylen m\u1edbi c\u00f3 \u0111\u01b0\u1ee3c c\u00e1c t\u00ednh ch\u1ea5t \u01b0u vi\u1ec7t \u0111\u00e3 k\u1ec3 tr\u00ean.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: Polytetrafloetylen; Vua ch\u1ea5t d\u1ebbo.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
Polytetrafloetylen l\u00e0 “k\u1ebb sinh sau” trong th\u1ebf gi\u1edbi c\u00e1c ch\u1ea5t d\u1ebbo. H\u1ee3p ch\u1ea5t n\u00e0y \u0111\u01b0\u1ee3c ch\u00ednh th\u1ee9c s\u1ea3n xu\u1ea5t ch\u1ec9 m\u1edbi kho\u1ea3ng 30 n\u0103m tr\u01b0\u1edbc \u0111\u00e2y. Th\u1ebf nh\u01b0ng h\u1ee3p ch\u1ea5t \u0111\u00e3 nhanh ch\u00f3ng \u0111\u01b0\u1ee3c t\u00f4n l\u00e0 “vua ch\u1ea5t d\u1ebbo”. V\u00ec sao v\u1eady? Polytetrafloetylen c\u00f3 nhi\u1ec1u t\u00ednh ch\u1ea5t \u01b0u vi\u1ec7t m\u00e0 c\u00e1c lo\u1ea1i ch\u1ea5t d\u1ebbo kh\u00e1c […]<\/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":[8,15],"tags":[],"class_list":["post-7856","post","type-post","status-publish","format-standard","hentry","category-hoa-hoc","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7856","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=7856"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7856\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=7856"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=7856"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=7856"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}