{"id":118476,"date":"2022-08-22T16:35:36","date_gmt":"2022-08-22T08:35:36","guid":{"rendered":"https:\/\/www.alpapowder.com\/118476\/"},"modified":"2022-08-22T16:35:36","modified_gmt":"2022-08-22T08:35:36","slug":"dieu-che-canxi-cacbonat-hinh-cau-bang-phan-ung-sieu-trong-luc-ket-tinh-va-cacbon-hoa","status":"publish","type":"post","link":"https:\/\/www.alpapowder.com\/vi\/118476\/","title":{"rendered":"\u0110i\u1ec1u ch\u1ebf canxi cacbonat h\u00ecnh c\u1ea7u b\u1eb1ng ph\u1ea3n \u1ee9ng si\u00eau tr\u1ecdng l\u1ef1c k\u1ebft tinh v\u00e0 cacbon h\u00f3a"},"content":{"rendered":"

\"\"<\/p>\n

C\u00e1c d\u1ea1ng ph\u1ed5 bi\u1ebfn c\u1ee7a canxi cacbonat ch\u1ee7 y\u1ebfu bao g\u1ed3m h\u00ecnh d\u1ea1ng kh\u00f4ng \u0111\u1ec1u, h\u00ecnh tr\u1ee5c, h\u00ecnh c\u1ea7u, h\u00ecnh v\u1ea3y v\u00e0 h\u00ecnh kh\u1ed1i, vv C\u00e1c d\u1ea1ng kh\u00e1c nhau c\u1ee7a canxi cacbonat c\u00f3 c\u00e1c l\u0129nh v\u1ef1c \u1ee9ng d\u1ee5ng v\u00e0 ch\u1ee9c n\u0103ng kh\u00e1c nhau. , kh\u1ea3 n\u0103ng h\u00f2a tan v\u00e0 di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t ri\u00eang l\u1edbn, v.v., c\u00f3 c\u00e1c \u1ee9ng d\u1ee5ng quan tr\u1ecdng trong l\u0129nh v\u1ef1c nh\u1ef1a, cao su, th\u1ef1c ph\u1ea9m v\u00e0 s\u1ea3n xu\u1ea5t gi\u1ea5y.<\/p>\n

Hi\u1ec7n nay, c\u00e1c ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec1u ch\u1ebf canxi cacbonat h\u00ecnh c\u1ea7u ch\u00ednh l\u00e0 ph\u01b0\u01a1ng ph\u00e1p metathesis v\u00e0 ph\u01b0\u01a1ng ph\u00e1p cacbon h\u00f3a. M\u1eb7c d\u00f9 ph\u01b0\u01a1ng ph\u00e1p metathesis c\u00f3 th\u1ec3 t\u1ea1o ra canxi cacbonat h\u00ecnh c\u1ea7u v\u1edbi h\u00ecnh th\u00e1i \u0111\u1ec1u \u0111\u1eb7n v\u00e0 ph\u00e2n t\u00e1n t\u1ed1t, nh\u01b0ng nguy\u00ean li\u1ec7u c\u1ee7a ph\u01b0\u01a1ng ph\u00e1p n\u00e0y r\u1ea5t \u0111\u1eaft v\u00e0 m\u1ed9t l\u01b0\u1ee3ng l\u1edbn c\u00e1c ion t\u1ea1p ch\u1ea5t s\u1ebd \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o, kh\u00f4ng th\u00edch h\u1ee3p cho s\u1ea3n xu\u1ea5t c\u00f4ng nghi\u1ec7p. Ph\u01b0\u01a1ng ph\u00e1p cacbon h\u00f3a l\u00e0 ph\u01b0\u01a1ng ph\u00e1p \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t trong c\u00f4ng nghi\u1ec7p. Ph\u01b0\u01a1ng ph\u00e1p cacbon h\u00f3a truy\u1ec1n th\u1ed1ng ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c chia th\u00e0nh ph\u01b0\u01a1ng ph\u00e1p cacbon h\u00f3a gi\u00e1n \u0111o\u1ea1n v\u00e0 ph\u01b0\u01a1ng ph\u00e1p cacbon h\u00f3a phun li\u00ean t\u1ee5c. M\u1eb7c d\u00f9 ph\u01b0\u01a1ng ph\u00e1p cacbon h\u00f3a c\u00f3 chi ph\u00ed th\u1ea5p v\u00e0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t tr\u00ean quy m\u00f4 l\u1edbn, nh\u01b0ng ph\u01b0\u01a1ng ph\u00e1p cacbon h\u00f3a truy\u1ec1n th\u1ed1ng \u0111\u1ec3 \u0111i\u1ec1u ch\u1ebf canxi cacbonat h\u00ecnh c\u1ea7u c\u00f3 c\u00e1c v\u1ea5n \u0111\u1ec1 nh\u01b0 ph\u00e2n b\u1ed1 k\u00edch th\u01b0\u1edbc h\u1ea1t kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u v\u00e0 hi\u1ec7u qu\u1ea3 s\u1ea3n xu\u1ea5t th\u1ea5p.<\/p>\n

Ph\u01b0\u01a1ng ph\u00e1p k\u1ebft tinh ph\u1ea3n \u1ee9ng si\u00eau tr\u1ecdng l\u1ef1c l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec1u ch\u1ebf v\u1eadt li\u1ec7u nano m\u1edbi, b\u1ea3n ch\u1ea5t c\u1ee7a n\u00f3 l\u00e0 t\u1ea1o ra l\u1ef1c ly t\u00e2m c\u1ef1c l\u1edbn th\u00f4ng qua chuy\u1ec3n \u0111\u1ed9ng quay t\u1ed1c \u0111\u1ed9 cao, m\u00f4 ph\u1ecfng m\u00f4i tr\u01b0\u1eddng c\u1ee7a tr\u01b0\u1eddng si\u00eau tr\u1ecdng l\u1ef1c. R\u00f4to \u0111\u00f3ng g\u00f3i quay t\u1ed1c \u0111\u1ed9 cao trong l\u00f2 ph\u1ea3n \u1ee9ng si\u00eau tr\u1ecdng l\u1ef1c \u0111\u1eadp ch\u1ea5t l\u1ecfng th\u00e0nh c\u00e1c s\u1ee3i l\u1ecfng, gi\u1ecdt ho\u1eb7c m\u00e0ng ch\u1ea5t l\u1ecfng, v\u00e0 di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t ri\u00eang c\u1ee7a ch\u1ea5t l\u1ecfng t\u0103ng m\u1ea1nh. 1 \u0111\u1ebfn 3 b\u1eadc l\u1edbn, qu\u00e1 tr\u00ecnh tr\u1ed9n vi m\u00f4 v\u00e0 chuy\u1ec3n kh\u1ed1i \u0111\u01b0\u1ee3c t\u0103ng c\u01b0\u1eddng \u0111\u00e1ng k\u1ec3, do \u0111\u00f3 th\u1eddi gian ph\u1ea3n \u1ee9ng ng\u1eafn h\u01a1n so v\u1edbi ph\u01b0\u01a1ng ph\u00e1p cacbon h\u00f3a truy\u1ec1n th\u1ed1ng, v\u00e0 s\u1ea3n ph\u1ea9m c\u00f3 \u01b0u \u0111i\u1ec3m l\u00e0 k\u00edch th\u01b0\u1edbc h\u1ea1t nh\u1ecf, ph\u00e2n b\u1ed1 k\u00edch th\u01b0\u1edbc h\u1ea1t h\u1eb9p, s\u1ea3n ph\u1ea9m c\u00f3 \u0111\u1ed9 tinh khi\u1ebft cao. , v\u00e0 h\u00ecnh th\u00e1i \u0111\u1ec1u \u0111\u1eb7n h\u01a1n. . L\u00f2 ph\u1ea3n \u1ee9ng si\u00eau tr\u1ecdng l\u1ef1c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong vi\u1ec7c chu\u1ea9n b\u1ecb v\u1eadt li\u1ec7u nano do hi\u1ec7u \u1ee9ng tr\u1ed9n vi m\u00f4 v\u00e0 truy\u1ec1n kh\u1ed1i t\u1ed1t c\u1ee7a ch\u00fang.<\/p>\n

Canxi cacbonat h\u00ecnh c\u1ea7u \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n t\u1eeb vaterit trong h\u1ea7u h\u1ebft c\u00e1c tr\u01b0\u1eddng h\u1ee3p, nh\u01b0ng vaterit, l\u00e0 m\u1ed9t d\u1ea1ng tinh th\u1ec3 kh\u00f4ng \u1ed5n \u0111\u1ecbnh v\u1ec1 m\u1eb7t nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc, kh\u00f3 t\u1ed3n t\u1ea1i \u1ed5n \u0111\u1ecbnh trong m\u00f4i tr\u01b0\u1eddng \u1ea9m v\u00e0 dung d\u1ecbch n\u01b0\u1edbc, v\u00e0 c\u1ea7n m\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 thu \u0111\u01b0\u1ee3c n\u00f3 \u1ed5n \u0111\u1ecbnh. Nghi\u00ean c\u1ee9u cho th\u1ea5y r\u1eb1ng vi\u1ec7c \u0111\u01b0a NH4 + v\u00e0o trong ph\u1ea3n \u1ee9ng cacbon h\u00f3a kh\u00f4ng ch\u1ec9 c\u00f3 th\u1ec3 \u1ee9c ch\u1ebf s\u1ef1 h\u00ecnh th\u00e0nh canxit trong qu\u00e1 tr\u00ecnh k\u1ebft tinh, v\u00e0 t\u1ea1o \u0111i\u1ec1u ki\u1ec7n chuy\u1ec3n d\u1ea1ng tinh th\u1ec3 c\u1ee7a canxi cacbonat th\u00e0nh vaterit, m\u00e0 kh\u00f4ng kh\u00ed c\u1ee7a NH4 + c\u00f3 th\u1ec3 t\u1ea1o ra vaterit t\u1ed3n t\u1ea1i \u1ed5n \u0111\u1ecbnh trong dung d\u1ecbch.<\/p>\n

Kh\u00e1c v\u1edbi NH4 +, c\u00e1c axit amin c\u00f3 t\u00ednh axit s\u1ebd ph\u00e2n ly trong dung d\u1ecbch v\u00e0 k\u1ebft h\u1ee3p v\u1edbi Ca2 + t\u1ea1o th\u00e0nh khu\u00f4n m\u1eabu tinh th\u1ec3 h\u1ea1t. D\u01b0\u1edbi \u1ea3nh h\u01b0\u1edfng c\u1ee7a khu\u00f4n m\u1eabu tinh th\u1ec3 h\u1ea1t, canxi cacbonat t\u1ea1o th\u00e0nh c\u0169ng s\u1ebd xu\u1ea5t hi\u1ec7n pha tinh th\u1ec3 di c\u0103n, v\u00e0 axit amin th\u00edch h\u1ee3p Vi\u1ec7c \u0111\u01b0a v\u00e0o s\u1ebd t\u1ea1o ra c\u00e1c ch\u1ee9c n\u0103ng c\u1ee5 th\u1ec3 v\u00e0 thay \u0111\u1ed5i h\u00ecnh th\u00e1i trong qu\u00e1 tr\u00ecnh k\u1ebft tinh canxi cacbonat.<\/p>\n

S\u1eed d\u1ee5ng axit glutamic r\u1ebb ti\u1ec1n v\u00e0 amoni clorua l\u00e0m ch\u1ea5t ph\u1ee5 gia, qu\u00e1 tr\u00ecnh \u0111i\u1ec1u ch\u1ebf canxi cacbonat h\u00ecnh c\u1ea7u c\u00f3 th\u1ec3 ki\u1ec3m so\u00e1t \u0111\u01b0\u1ee3c trong tr\u01b0\u1eddng si\u00eau tr\u1ecdng l\u1ef1c \u0111\u00e3 \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u, v\u00e0 t\u00e1c \u0111\u1ed9ng c\u1ee7a hai ch\u1ea5t ph\u1ee5 gia trong qu\u00e1 tr\u00ecnh t\u1ed5ng h\u1ee3p canxi cacbonat \u0111\u00e3 \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u. K\u1ebft qu\u1ea3 cho th\u1ea5y:<\/p>\n

(1) S\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p k\u1ebft tinh ph\u1ea3n \u1ee9ng si\u00eau tr\u1ecdng l\u1ef1c v\u00e0 ph\u01b0\u01a1ng ph\u00e1p cacbon h\u00f3a, k\u00edch th\u01b0\u1edbc h\u1ea1t c\u00f3 th\u1ec3 thu \u0111\u01b0\u1ee3c trong \u0111i\u1ec1u ki\u1ec7n t\u1ed1i \u01b0u m\u00e0 axit L-glutamic v\u00e0 amoni clorua \u0111\u01b0\u1ee3c th\u00eam v\u00e0o l\u1ea7n l\u01b0\u1ee3t l\u00e0 4% v\u00e0 20% canxi hydroxit, v\u00e0 h\u1ec7 s\u1ed1 si\u00eau tr\u1ecdng l\u1ef1c l\u00e0 161,0. Vaterit canxi cacbonat tinh khi\u1ebft c\u00f3 \u0111\u1ed9 c\u1ea7u cao kho\u1ea3ng 500nm.<\/p>\n

(2) Tr\u01b0\u1edbc khi ph\u1ea3n \u1ee9ng b\u1eaft \u0111\u1ea7u, axit L-glutamic v\u00e0 c\u00e1c ion canxi trong dung d\u1ecbch t\u1ea1o th\u00e0nh khu\u00f4n m\u1eabu, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ef1 h\u00ecnh th\u00e0nh v\u00e0 ph\u00e1t tri\u1ec3n c\u1ee7a canxi cacbonat, v\u00e0 l\u01b0\u1ee3ng NH4 + d\u1ed3i d\u00e0o trong dung d\u1ecbch trong qu\u00e1 tr\u00ecnh ph\u1ea3n \u1ee9ng t\u1ea1o m\u00f4i tr\u01b0\u1eddng t\u1ed1t cho s\u1ef1 h\u00ecnh th\u00e0nh vaterite, Qu\u00e1 tr\u00ecnh c\u1eaft t\u1ed1c \u0111\u1ed9 cao c\u1ee7a ch\u1ea5t l\u1ecfng b\u1eb1ng l\u00f2 ph\u1ea3n \u1ee9ng si\u00eau tr\u1ecdng l\u1ef1c ng\u0103n ng\u1eeba kh\u1ea3 n\u0103ng ph\u1ee7 qu\u00e1 nhi\u1ec1u nguy\u00ean li\u1ec7u th\u00f4 canxi hydroxit v\u00e0 nh\u1eadn ra qu\u00e1 tr\u00ecnh \u0111i\u1ec1u ch\u1ebf canxi cacbonat h\u00ecnh c\u1ea7u c\u00f3 th\u1ec3 ki\u1ec3m so\u00e1t \u0111\u01b0\u1ee3c.<\/p>\n","protected":false},"excerpt":{"rendered":"

C\u00e1c d\u1ea1ng ph\u1ed5 bi\u1ebfn c\u1ee7a canxi cacbonat ch\u1ee7 y\u1ebfu bao g\u1ed3m h\u00ecnh d\u1ea1ng b\u1ea5t th\u01b0\u1eddng, h\u00ecnh tr\u1ee5c, h\u00ecnh c\u1ea7u, h\u00ecnh v\u1ea3y v\u00e0 h\u00ecnh kh\u1ed1i, vv C\u00e1c d\u1ea1ng kh\u00e1c nhau c\u1ee7a canxi cacbonat c\u00f3 c\u00e1c l\u0129nh v\u1ef1c \u1ee9ng d\u1ee5ng v\u00e0 ch\u1ee9c n\u0103ng kh\u00e1c nhau. , kh\u1ea3 n\u0103ng h\u00f2a tan v\u00e0 di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t ri\u00eang l\u1edbn, v.v., c\u00f3 c\u00e1c \u1ee9ng d\u1ee5ng quan tr\u1ecdng trong l\u0129nh v\u1ef1c nh\u1ef1a, cao su, th\u1ef1c ph\u1ea9m v\u00e0 s\u1ea3n xu\u1ea5t gi\u1ea5y.<\/p>\n","protected":false},"author":7,"featured_media":118452,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[852],"tags":[],"class_list":["post-118476","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cong-nghiep-tin-tuc-vi"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts\/118476"}],"collection":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/comments?post=118476"}],"version-history":[{"count":0,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts\/118476\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/media\/118452"}],"wp:attachment":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/media?parent=118476"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/categories?post=118476"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/tags?post=118476"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}