{"id":115125,"date":"2021-12-10T17:02:43","date_gmt":"2021-12-10T09:02:43","guid":{"rendered":"https:\/\/www.alpapowder.com\/115125\/"},"modified":"2021-12-10T17:02:43","modified_gmt":"2021-12-10T09:02:43","slug":"bien-doi-be-mat-cua-nano-canxi-cacbonat","status":"publish","type":"post","link":"https:\/\/www.alpapowder.com\/vi\/115125\/","title":{"rendered":"Bi\u1ebfn \u0111\u1ed5i b\u1ec1 m\u1eb7t c\u1ee7a nano canxi cacbonat"},"content":{"rendered":"
Canxi cacbonat nano l\u00e0 m\u1ed9t lo\u1ea1i v\u1eadt li\u1ec7u b\u1ed9t r\u1eafn si\u00eau m\u1ecbn m\u1edbi \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n v\u00e0o nh\u1eefng n\u0103m 1980, v\u00e0 k\u00edch th\u01b0\u1edbc h\u1ea1t c\u1ee7a n\u00f3 l\u00e0 t\u1eeb 0,01 \u0111\u1ebfn 0,1 \u03bcm. Ch\u00ednh do \u0111\u1ed9 si\u00eau m\u1ecbn c\u1ee7a c\u00e1c h\u1ea1t nano canxi cacbonat \u0111\u00e3 t\u1ea1o ra nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m m\u00e0 canxi cacbonat th\u00f4ng th\u01b0\u1eddng kh\u00f4ng c\u00f3 \u0111\u01b0\u1ee3c n\u00ean nano canxi cacbonat \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c l\u0129nh v\u1ef1c kh\u00e1c nhau.<\/p>\n
Nano canxi cacbonat c\u00f3 l\u1ecbch s\u1eed ph\u00e1t tri\u1ec3n h\u01a1n 50 n\u0103m v\u00e0 \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c l\u0129nh v\u1ef1c.<\/p>\n
Canxi cacbonat nano<\/td>\n | M\u1ee5c \u0111\u00edch<\/td>\n | C\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t<\/td>\n<\/tr>\n |
Nh\u1ef1a<\/td>\n | T\u01b0\u01a1ng th\u00edch t\u1ed1t v\u1edbi nh\u1ef1a, c\u1ea3i thi\u1ec7n t\u00ednh ch\u1ea5t l\u01b0u bi\u1ebfn c\u1ee7a s\u1ea3n ph\u1ea9m, v.v.<\/td>\n<\/tr>\n | |
L\u00e0m gi\u1ea5y<\/td>\n | C\u1ea3i thi\u1ec7n m\u1eadt \u0111\u1ed9 kh\u1ed1i, \u0111\u1ed9 m\u1ecbn r\u00f5 r\u00e0ng v\u00e0 kh\u1ea3 n\u0103ng h\u00fat n\u01b0\u1edbc c\u1ee7a gi\u1ea5y.<\/td>\n<\/tr>\n | |
Cao su<\/td>\n | Gia c\u1ed1, l\u1ea5p \u0111\u1ea7y, t\u00f4 m\u00e0u, c\u1ea3i ti\u1ebfn c\u00f4ng ngh\u1ec7 ch\u1ebf bi\u1ebfn v\u00e0 hi\u1ec7u su\u1ea5t s\u1ea3n ph\u1ea9m.<\/td>\n<\/tr>\n | |
S\u01a1n<\/td>\n | C\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng thixotropy c\u1ee7a h\u1ec7 th\u1ed1ng m\u00e0u xanh lam, \u0111\u1ed9 b\u00e1m d\u00ednh c\u1ee7a s\u01a1n \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn cao, kh\u1ea3 n\u0103ng ch\u1ed1ng c\u1ecd r\u1eeda v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng b\u00e1m b\u1ea9n.<\/td>\n<\/tr>\n | |
Kh\u00e1c<\/td>\n | Trong c\u00f4ng nghi\u1ec7p th\u1ee9c \u0103n ch\u0103n nu\u00f4i, n\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 m\u1ed9t ch\u1ea5t b\u1ed5 sung canxi \u0111\u1ec3 t\u0103ng h\u00e0m l\u01b0\u1ee3ng canxi trong th\u1ee9c \u0103n ch\u0103n nu\u00f4i.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n V\u00ec nano canxi cacbonat c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m l\u00e0 n\u0103ng l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t l\u1edbn, kh\u1ea3 n\u0103ng ph\u00e2n t\u00e1n th\u1ea5p v\u00e0 b\u1ec1 m\u1eb7t \u01b0a n\u01b0\u1edbc, n\u00f3 ph\u00e2n t\u00e1n kh\u00f4ng ho\u00e0n to\u00e0n trong m\u00f4i tr\u01b0\u1eddng h\u1eefu c\u01a1 v\u00e0 nano canxi cacbonat kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng tr\u1ef1c ti\u1ebfp trong m\u00f4i tr\u01b0\u1eddng h\u1eefu c\u01a1.<\/p>\n M\u1ee5c \u0111\u00edch c\u1ee7a s\u1eeda \u0111\u1ed5i canxi cacbonat nano l\u00e0 gi\u1ea3m s\u1ef1 g\u1eafn k\u1ebft gi\u1eefa c\u00e1c h\u1ea1t v\u00e0 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng ph\u00e2n t\u00e1n c\u1ee7a n\u00f3; c\u1ea3i thi\u1ec7n ho\u1ea1t \u0111\u1ed9ng b\u1ec1 m\u1eb7t; c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1c ch\u1ea5t kh\u00e1c; c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng kh\u00e1ng axit; \u0111i\u1ec1u ch\u1ebf canxi cacbonat nano v\u1edbi c\u00e1c h\u00ecnh d\u1ea1ng tinh th\u1ec3 c\u1ee5 th\u1ec3 \u0111\u1ec3 s\u1eed d\u1ee5ng trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p kh\u00e1c nhau.<\/p>\n C\u00e1c ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec1u ch\u1ec9nh c\u1ee7a nano canxi cacbonat th\u01b0\u1eddng ch\u1ee7 y\u1ebfu \u00e1p d\u1ee5ng ph\u1ea3n \u1ee9ng gh\u00e9p v\u00e0 gh\u00e9p n\u1ed1i, t\u1ee9c l\u00e0 k\u1ebft n\u1ed1i m\u1ed9t s\u1ed1 nh\u00f3m h\u1eefu c\u01a1 nh\u1ea5t \u0111\u1ecbnh (ch\u1eb3ng h\u1ea1n nh\u01b0 nh\u00f3m cacboxyl, v.v.), ch\u1ea5t k\u1ebft n\u1ed1i, ch\u1ea5t ho\u1ea1t \u0111\u1ed9ng b\u1ec1 m\u1eb7t, v.v. tr\u00ean b\u1ec1 m\u1eb7t c\u1ee7a nano canxi cacbonat. C\u00e1c ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng bao g\u1ed3m ch\u1ea5t ho\u1ea1t \u0111\u1ed9ng b\u1ec1 m\u1eb7t, polyme v\u00e0 ch\u1ea5t k\u1ebft n\u1ed1i.<\/p>\n <\/p>\n Ch\u1ea5t ho\u1ea1t \u0111\u1ed9ng b\u1ec1 m\u1eb7t<\/h4>\nCh\u1ea5t ho\u1ea1t \u0111\u1ed9ng b\u1ec1 m\u1eb7t h\u1ea5p th\u1ee5 ho\u1eb7c ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc tr\u00ean b\u1ec1 m\u1eb7t c\u1ee7a c\u00e1c h\u1ea1t canxi cacbonat \u0111\u1ec3 t\u1ea1o th\u00e0nh m\u1ed9t l\u1edbp c\u1ea5u tr\u00fac \u01b0a b\u00e9o, c\u00f3 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch t\u1ed1t v\u1edbi ch\u1ea5t \u0111\u1ed9n v\u00e0 nh\u1ef1a, v\u00e0 l\u00e0m gi\u1ea3m \u0111\u00e1ng k\u1ec3 \u0111\u1ed9 nh\u1edbt c\u1ee7a polyme. C\u00e1c ch\u1ea5t ho\u1ea1t \u0111\u1ed9ng b\u1ec1 m\u1eb7t th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0 axit b\u00e9o (mu\u1ed1i), axit nh\u1ef1a, lignin v\u00e0 ch\u1ea5t ho\u1ea1t \u0111\u1ed9ng b\u1ec1 m\u1eb7t anion \/ cation.<\/p>\n Polymer<\/h4>\nPolyme \u0111i\u1ec1u ch\u1ec9nh b\u1ec1 m\u1eb7t c\u1ee7a nano canxi cacbonat, c\u00f3 th\u1ec3 ph\u1ee7 l\u00ean b\u1ec1 m\u1eb7t c\u1ee7a nano canxi cacbonat \u0111\u1ec3 t\u1ea1o th\u00e0nh m\u1ed9t l\u1edbp ph\u1ee7 ho\u00e0n ch\u1ec9nh v\u00e0 d\u00e0y \u0111\u1eb7c, c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng ph\u00e2n t\u00e1n v\u00e0 t\u0103ng kh\u1ea3 n\u0103ng ch\u1ed1ng axit. C\u00e1c polyme th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng bao g\u1ed3m axit acrylic, mu\u1ed1i v\u00e0 terpolyme.<\/p>\n Ch\u1ea5t g\u1eafn k\u1ebft<\/h4>\nM\u1ed9t ph\u1ea7n c\u1ee7a c\u00e1c nh\u00f3m trong ph\u00e2n t\u1eed t\u00e1c nh\u00e2n k\u1ebft n\u1ed1i ph\u1ea3n \u1ee9ng v\u1edbi c\u00e1c nh\u00f3m ch\u1ee9c \u0111\u1ec3 t\u1ea1o th\u00e0nh li\u00ean k\u1ebft h\u00f3a h\u1ecdc m\u1ea1nh, v\u00e0 ph\u1ea7n kh\u00e1c c\u1ee7a c\u00e1c nh\u00f3m c\u00f3 th\u1ec3 tr\u1ea3i qua c\u00e1c ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc ho\u1eb7c v\u01b0\u1edbng v\u00edu v\u1eadt l\u00fd. V\u1edbi s\u1ef1 tr\u1ee3 gi\u00fap c\u1ee7a l\u1edbp \u0111\u01a1n l\u1edbp “b\u1eafc c\u1ea7u”, c\u00e1c kho\u00e1ng ch\u1ea5t v\u00e0 sinh v\u1eadt c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c k\u1ebft h\u1ee3p v\u1edbi nhau. C\u00e1c v\u1eadt li\u1ec7u r\u1ea5t kh\u00e1c nhau \u0111\u01b0\u1ee3c k\u1ebft h\u1ee3p ch\u1eafc ch\u1eafn. C\u00e1c t\u00e1c nh\u00e2n gh\u00e9p n\u1ed1i th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i th\u00e0nh lo\u1ea1t organosilicon, lo\u1ea1t titan, lo\u1ea1t nh\u00f4m, lo\u1ea1t crom, v.v. theo y\u1ebfu t\u1ed1 c\u1ed1t l\u00f5i c\u1ee7a ch\u00fang. C\u00e1c t\u00e1c nh\u00e2n gh\u00e9p n\u1ed1i th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u1ea5t l\u00e0 c\u00e1c t\u00e1c nh\u00e2n gh\u00e9p n\u1ed1i titanate v\u00e0 c\u00e1c organosilanes.<\/p>\n Ph\u01b0\u01a1ng ph\u00e1p s\u1eeda \u0111\u1ed5i b\u1ec1 m\u1eb7t<\/h4>\nPh\u01b0\u01a1ng ph\u00e1p s\u1eeda \u0111\u1ed5i ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc c\u1ee5c b\u1ed9 ch\u1ee7 y\u1ebfu s\u1eed d\u1ee5ng ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc gi\u1eefa c\u00e1c nh\u00f3m ch\u1ee9c tr\u00ean b\u1ec1 m\u1eb7t c\u1ee7a nano canxi cacbonat v\u00e0 ch\u1ea5t x\u1eed l\u00fd \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ee5c \u0111\u00edch \u0111i\u1ec1u ch\u1ec9nh. Quy tr\u00ecnh c\u1ee5 th\u1ec3 \u0111\u01b0\u1ee3c chia th\u00e0nh hai lo\u1ea1i: ph\u01b0\u01a1ng ph\u00e1p kh\u00f4 v\u00e0 ph\u01b0\u01a1ng ph\u00e1p \u01b0\u1edbt.<\/p>\n Ph\u01b0\u01a1ng ph\u00e1p kh\u00f4 l\u00e0 \u0111\u01b0a b\u1ed9t canxi cacbonat nano v\u00e0o ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh, sau \u0111\u00f3 \u0111\u01b0a v\u00e0o ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh b\u1ec1 m\u1eb7t \u0111\u1ec3 x\u1eed l\u00fd b\u1ec1 m\u1eb7t sau khi ch\u1ea1y. Bi\u1ebfn t\u00ednh kh\u00f4 r\u1ea5t \u0111\u01a1n gi\u1ea3n v\u00e0 d\u1ec5 d\u00e0ng, \u0111\u00f3ng g\u00f3i tr\u1ef1c ti\u1ebfp, d\u1ec5 v\u1eadn chuy\u1ec3n, nh\u01b0ng b\u1ed9t thu \u0111\u01b0\u1ee3c kh\u00f4ng \u0111\u1ed3ng nh\u1ea5t, th\u00edch h\u1ee3p v\u1edbi c\u00e1c ch\u1ea5t n\u1ed1i nh\u01b0 titanat.<\/p>\n S\u1eeda \u0111\u1ed5i \u01b0\u1edbt l\u00e0 th\u00eam tr\u1ef1c ti\u1ebfp ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh v\u00e0o dung d\u1ecbch canxi cacbonat nano \u0111\u1ec3 x\u1eed l\u00fd bi\u1ebfn \u0111\u1ed5i b\u1ec1 m\u1eb7t. Hi\u1ec7u qu\u1ea3 bi\u1ebfn t\u00ednh c\u1ee7a bi\u1ebfn t\u00ednh \u01b0\u1edbt l\u00e0 t\u1ed1t, nh\u01b0ng qu\u00e1 tr\u00ecnh ph\u1ee9c t\u1ea1p v\u00e0 v\u1eadn chuy\u1ec3n kh\u00f4ng thu\u1eadn ti\u1ec7n, v\u00ec v\u1eady n\u00f3 th\u00edch h\u1ee3p cho c\u00e1c ch\u1ea5t ho\u1ea1t \u0111\u1ed9ng b\u1ec1 m\u1eb7t tan trong n\u01b0\u1edbc.<\/p>\n
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